Patent Publication Number: US-2004057786-A1

Title: Coupling device, in particular for at least two pieces adjustable relative to each other

Description:
[0001] The invention relates to a coupling mechanism, in particular for at least two parts that are adjustable relative to one another, of the type described in the generic parts of claims 1 and 2, and the use of the coupling mechanism as an energy-absorbing deformation system, as described in claim 51.  
       [0002] A number of adjusting mechanisms are already known, which are fitted with a fixing mechanism incorporating a coupling mechanism between two parts that are adjustable relative to one another, where each of the parts has a respective coupling element and the coupling elements of the parts are releasably fixed in a located locked position obtained by a form-fitting arrangement which fixes their relative position against the action of elastically deformable return elements. The coupling elements forming a coupling mechanism, disposed opposite one another so that they can be brought into engagement, have several rigid coupling parts which are spaced at a distance apart from one another or immediately one after the other. The disadvantage of fixing mechanisms or coupling mechanisms of this type primarily resides in the fact that because the coupling parts are disposed so as to locate with one another, a relative position between two relatively adjustable parts can be fixed but only at predetermined distances.  
       [0003] The underlying objective of the invention is to propose an adjusting mechanism co-operating with a fixing system having a coupling mechanism, which enables several parts that are adjustable relative to one another to be steplessly fixed in a set relative position.  
       [0004] The objective of the invention is achieved as a result of the characterising features defined in claim  1 . The surprising advantages obtained as a result of the features defined in the characterising part of claim 1 are that high forces can be applied to the relatively adjustable parts by means of a coupling mechanism in a direction parallel with the bearing surface, without causing any shift in the relative position of the parts. Another advantage of the compact coupling elements also primarily resides in the fact that, firstly, only a small amount of mounting space is needed because of the compact construction and, secondly, only short adjustment paths are needed to engage or disengage the locatable coupling elements. Furthermore, the mutually locatable elements can be coupled in any relative position, thereby enabling a relative position of several parts to be fixed in a stepless arrangement.  
       [0005] The objective is also achieved by the invention as a result of the characterising features set out in claim 2. The surprising advantages of this approach are that, because the coupling parts of the coupling elements which can be moved into engagement or located with one another are of a resiliently flexible and reversible design, even if several parts come into contact with one another they can be pushed sideways out of the way and, as the adjusting mechanism is further adjusted, other part regions of the coupling elements and their coupling parts can locate with one another in a form-fitting arrangement, which means that a major part of the located coupling parts can be used as a means of transmitting forces acting in the direction parallel with or at an incline to the bearing surface. This enables a fine adjustment or fixture in several spatial directions in order to fix this set relative position. It also enables a stepless engagement of the locating coupling elements.  
       [0006] Other embodiments defined in claims 3 and 4 are also of advantage because the pressure applied by the coupling elements during the locating process prevents the located, fixed locking position from inadvertently being released.  
       [0007] With the embodiment defined in claim 5, the coupling mechanism can be used as an energy-absorbing safety mechanism, for example, in which case, provided they are not too high, impact forces can be absorbed by the coupling mechanism without damaging it.  
       [0008] Also of advantage are the embodiments defined in claims 6 to 10, whereby, when the coupling elements are located in order to fix a relative position between at least two relatively adjustable parts, in particular in a motor vehicle, a form-fitting arrangement is obtained in certain regions whilst a and form-fitting and/or frictional-locking arrangement is obtained in other regions.  
       [0009] As a result of the embodiments defined in claims 11 and 12, if at least two of the profile crests of the two relatively adjustable coupling elements come into contact with one another, they are pushed together, as a result of which the deflected material is pushed into the profile troughs adjacent to the profile crests, and, as a result of the pressure applied, the parts which are located in a fixing and locking position produce a friction lock for the coupling elements and parts in the region of the abutting profile crests, and, because of the deformation which occurs between the abutting profile crests, additionally generates a form-fit connection, so that the releasably fixable parts are easily able to transmit high forces into the bearing surface in a parallel or inclined direction.  
       [0010] Claims 13 and 14 enable adjustments to be made in order to accommodate various requirements. The embodiments defined in claims 15 and 16 enable the fixing of the relatively adjustable parts to be influenced directly at the profiled surface constituting the locating surface, so that the best possible adjustments can be made in order to meet certain requirements, such as force transmission.  
       [0011] The embodiments defined in claims 17 to 21 have proved to be of advantage because they increase the amount of force or torque which can be transmitted. Another advantage is the fact that the entire profiled surface can be used as a means of transmitting force.  
       [0012] Other advantages are to be had from the embodiments defined in claims 22 to 24, because a set relative position between several parts can be reliably fixed due to the resiliently flexible and reversible design of the coupling elements, even if the distances separating them are different and/or the number of coupling parts differs, and because of the pre-settable contact force of the adjusting mechanism.  
       [0013] The embodiments defined in claims 25 and 26 produce a secure fixture for the parts in every set relative position. Accordingly, the parts can be pushed in two spatial directions and/or turned towards one another.  
       [0014] Also of advantage is an embodiment defined in claim 27, because one of the surfaces of the support body is designed to lock or fix the coupling elements on one part and the other surface is designed to serve as a locating surface for releasably fixing a relative position. Furthermore, as a result of the distribution of the coupling parts on the surface of the support body, a relative position can be adjusted and fixed steplessly.  
       [0015] Advantages are also to be had from an embodiment as defined in claim 28, whereby any undesirable shifting of a relative position between two mutually fixed parts is prevented in a direction parallel with the bearing surface.  
       [0016] The advantage of the embodiment defined in claim 29 is that even wear and tear on the coupling parts caused by friction will not adversely affect fixing of the parts, and in particular will not lead to a reduction in the fixing forces.  
       [0017] As a result of the embodiment defined in claim 30, a part incorporating the coupling element can be made by an in expensive manufacturing process.  
       [0018] As defined in claim 31, forces or, if necessary torques, acting parallel with or at an angle to the seating surface can be eliminated.  
       [0019] The embodiments defined in claims 32 to 34 are also of advantage because different geometric shapes and materials can be used for the slightly flexible coupling elements and coupling parts in order to adapt to different requirements.  
       [0020] Claims 35 to 39 define a structurally simple and compact construction.  
       [0021] As a result of the embodiment defined in claim 40, the components slightly biassed towards one another offer a simple and essentially clearance-free way of adjusting the parts, in particular the steering shaft, relative to the mount, whereby the coupling parts are totally disengaged during the adjustment process, which prevents any friction-induced wear of the coupling elements during the process of adjusting the parts.  
       [0022] The embodiment of the coupling parts described in claim 41 is of advantage because the energy generated in the event of the vehicle colliding is largely absorbed by the coupling parts and projections, causing no undesirable lifting of the coupling parts from one another, which might cause the mutually fixed parts to be released. Consequently, movement is only possible, as an option, in the longitudinal direction of the coupling elements, which likewise leads to an absorption of energy.  
       [0023] Another possible embodiment is that defined in claim 42, whereby the co-operation of an essentially form-fitting and/or friction-locking fixture of the parts relative to one another provides a reliable fixing arrangement.  
       [0024] As defined in claims 43 and 44, an inexpensive fixing means known from the prior art can be used to provide a durable fixture between the coupling elements and the parts.  
       [0025] The embodiments defined in claims 45 and 46 enable any set relative position to be fixed, in particular an angle of inclination, length or height, between relatively adjustable parts, for example between a back part and seat part or a body and another part of a height-adjusting mechanism of a restraining element.  
       [0026] An embodiment of the coupling elements defined in claims 47 and 48 is also of advantage, resulting in a rapid cycle time dependent solely on the pressure applied in order to fix and lock the parts in a predetermined position relative to one another.  
       [0027] Advantageous embodiments are defined in claims 49 and 50, enabling standardised actuators to be used for engaging and disengaging the positioning elements.  
       [0028] Another advantage is that the coupling elements can be designed in an energy-absorbing deforming arrangement in respect of a force or energy acting in the longitudinal direction and/or transversely to the longitudinal direction, as described in claim 51, because the deformation of the coupling elements and coupling parts enables at least some of the kinetic energy to be absorbed. 
     
    
    
     [0029] In order to provide a clearer understanding, the invention will be explained in more detail below with reference to the appended drawings.  
     [0030] Of these:  
     [0031]FIG. 1 is a highly simplified, schematic diagram showing a side view of a steering shaft unit;  
     [0032]FIG. 2 is a highly simplified, schematic diagram showing a side view in section along line II-II indicated in FIG. 1 of a steering shaft unit with at least one adjusting and fixing mechanism as proposed by the invention in the disengaged open position;  
     [0033]FIG. 3 is a highly simplified, schematic diagram showing a side view of a support element in section;  
     [0034]FIG. 4 is a highly simplified, schematic diagram illustrating a part-region of the fixing mechanism proposed by the invention and illustrated in FIG. 3;  
     [0035]FIG. 5 is a highly simplified, schematic diagram showing the support element and fixing element in section along line V-V indicated in FIG. 3, from a front view;  
     [0036]FIG. 6 is a highly simplified, schematic diagram showing a plan view of the base element of the fixing element proposed by the invention;  
     [0037]FIG. 7 is a highly simplified, schematic diagram showing a front view in section of a part-region of the support element with a coupling mechanism in a released, open position;  
     [0038]FIG. 8 is a highly simplified, schematic diagram showing a front view in section of a part-region of the fixing mechanism illustrated in FIG. 7, in particular the coupling mechanism, in a disengaged, released open position;  
     [0039]FIG. 9 is a highly simplified, schematic diagram showing a front view in section of another embodiment of the coupling mechanism of the fixing system with the coupling elements in a located fixing and locking position and in engagement;  
     [0040]FIG. 10 is a highly simplified, schematic diagram showing a front view of a vehicle seat with a different embodiment of the adjusting mechanism and fixing system proposed by the invention;  
     [0041]FIG. 11 is a highly simplified, schematic diagram showing a front view of the vehicle seat with fixing mechanism and adjusting mechanism, seen in section;  
     [0042]FIG. 12 is a highly simplified, schematic diagram, showing a front view in section of a part-region of the adjusting and fixing mechanism of the vehicle seat with a different embodiment of the coupling mechanism;  
     [0043]FIG. 13 is a highly simplified, schematic diagram showing a section of a different embodiment of the disengaged coupling elements of the coupling mechanism between two relatively adjustable and fixable parts;  
     [0044]FIG. 14 is a highly simplified, schematic diagram in vertical section showing coupling elements as proposed by the invention attached to relatively adjustable parts in the disengaged state;  
     [0045]FIG. 15 is a highly simplified, schematic diagram showing a vertical section through coupling elements as proposed by the invention attached to relatively adjustable parts in an engaged state;  
     [0046]FIG. 16 is a highly simplified, schematic diagram showing a vertical section through coupling elements as proposed by the invention attached to relatively adjustable parts in the disengaged state;  
     [0047]FIG. 17 is a highly simplified, schematic diagram showing a vertical section through couplings elements as proposed by the invention attached to relatively adjustable parts in an engaged state. 
    
    
     [0048] Firstly, it should be pointed out that the same parts described in the different embodiments are denoted by the same reference numbers and the same component names and the disclosures made throughout the description can be transposed in terms of meaning to same parts bearing the same reference numbers or same component names. Furthermore, the positions chosen for the purposes of the description, such as top, bottom, side, etc,. relate to the drawing specifically being described and can be transposed in terms of meaning to a new position when another position is being described. Individual features or combinations of features from the different embodiments illustrated and described may be construed as independent inventive solutions or solutions proposed by the invention in their own right.  
     [0049]FIGS. 1 and 2, which will be described together, illustrate a steering shaft adjusting mechanism  1  with an adjusting mechanism  3  for varying the position of a steering shaft  2  and a fixing system  4  co-operating therewith for positioning the position of the steering shaft. The adjusting mechanism  3  for the steering shaft  2  has at least one mount  7  joined to a body  6  so as to be stationary by one or more fixing means  5 , a profiled piece  8  enclosed in at least certain regions by the mount  7  and a support element  9  mounted on the profiled piece  8  so as to be longitudinally slidable. A base  10  of the mount  7 ,which has a multi-cornered and in particular U-shaped cross section, is disposed adjacent to the body  6  and is joined, releasably as necessary, to the body  6  by fixing means  5 , in particular screws. The approximately U-shaped profiled piece  8  is disposed between the oppositely lying legs  11 , which extend in the direction away from the base  10  of the mount  7  or body  6 , and is preferably arranged rotated by 90° relative to the mount  7 . The support element  9  is longitudinally guided between the oppositely lying profile legs  12  of the profiled piece  8  with a guide mechanism  13  provided between the profiled piece  8  and the support element  9 .  
     [0050] The steering shaft  2  is longitudinally slidable relative to the mount  7 , which is itself mounted so as to be stationary on a vehicle, in the direction of the longitudinal mid-axis  14 —indicated by double arrow  15 —and mounted so as to pivot in at least one radial direction relative thereto—indicated by double arrow. The steering shaft  2  is of a telescopic design and its position in the support element  9  is maintained or supported by bearings  19 ,  20  provided at oppositely lying end regions  17 ,  18 . A length  21  of the support element  9  as measured in the direction of the longitudinal mid-axis  14  of the steering shaft  2  is longer than a length  22  of the profiled piece  8  and a length  23  of the mount  7 . The profiled piece  8 , which is mounted so as to pivot about a pivot axis  24  relative to the longitudinal mid-axis  14  of the steering shaft  2 , has, on an internal face  25  directed towards the support element  9 , a guide track arrangement  27  at least across a part of its length  22 , which complements guide elements  26  co-operating therewith, such as guide bars, spherical guides, guide blocks, slide blocks, etc.. The guide elements  26  are joined to the support element  9  in a form-fitting and/or friction-locking arrangement, in particular are screwed, riveted, welded or bonded thereto, and extend at least across a pact of the length  21 , in particular across the entire length  21 , of the support element  9 .  
     [0051] As may be seen by comparing FIGS. 1 and 2, at least one of the legs  11  of the mount  7  extending in the direction away from the body  6  has an orifice  30  which is curved in the radial direction relative to the longitudinal mid-axis  14 , with a length  28  and a width  29 , which is specifically convex towards the pivot axis  24 , enabling an adjustment to be made—as indicated by double arrow  16 . A clamping element  33  is provided, extending through a slot  31  of the support element  9  and a bore  32 , in particular a guide bore, of the profiled piece  8  and the orifice  30  of the mount  7  along a mid-axis  34  disposed transversely to the longitudinal mid-axis  14  of the steering shaft  2 . Naturally, several clamping elements  33  may also be used. As illustrated in this embodiment, the single-part or multi-part support element at least partially enclosed by the profiled piece  8  consists of a first part  35  and another oppositely lying part  36  joined to it. The parts  35 ,  36  to be joined to one another may naturally be joined by type of form-fitting and/or friction-locking connection known from the prior art, such as welding, bonding, brazing, screws, rivets, etc..  
     [0052] In the assembled state, the support element  9  has a profiled cross section. At least one of the two parts  35 ;  36 , and expediently part  35  directed towards the internal face  25  of the profiled piece  8 , has a slot  31  extending in a direction parallel with the longitudinal mid-axis  14  of the steering shaft  2 . The first part  35  has a height  37  extending parallel with the mid-axis  34  and a wall thickness  38 , whereby for practical purposes the height  37  is shorter and the wall thickness  38  greater than a height  39  and wall thickness  40  of the other part  36 . The first part  35  has a trapezoidal cross section, for example, and a widthways dimension  42  at a base  41  lying opposite the other part  36  is shorter than a widthways dimension in the joining region  43  of the two parts  35 ,  36  to be joined to one another. The parts of side legs  44  disposed between the base  41  of the first part  35  and the joining regions  43  are inclined towards one another in the direction of the height  37  and the angle becomes wider, the farther they are away from the base  41  they are, forming intermediate parts which are inclined relative to the mid-axis  34 , which are then adjoined by end parts extending parallel with the mid-axis  34 . The parts of the side legs  45  between a base  41  of the other part  36  lying opposite the base  41 of the first part and the joining region  43  initially extend parallel with the mid-axis  34  in the direction of the height  39 , adjoining which are intermediate parts with a slight taper, which are in turn followed by end parts extending parallel with the mid-axis  34 . Naturally any single-part or multi-part support element  9  known from the prior art may be used as the support element  9 .  
     [0053] A base  46  of the profiled piece  8  incorporating the bore  32 , in particular a guide bore, is disposed adjacent to the legs  11  of the mount  7  provided with the orifice  30 , from which the profile legs  12  extend in a direction away from the legs  11  or base  46  on either side and parallel with one another. An orifice width as measured at the internal face  25  between the oppositely lying profile legs  12  is at least slightly larger than a maximum width at the outer periphery of the support element  9 . For practical purposes, the profile legs  12  extend parallel with the mid-axis  34 . Recessed into transition regions  47  between the base  46  and the profile legs  12  of the profiled piece  8  and extending at an angle to the mid-axis  34  are guide track arrangements  27  forming guide tracks  48 ,  49 . As illustrated in this embodiment chosen as an example, the guide mechanism  13  is provided in the form of guide elements  26 , arranged on the external surface in the region of the intermediate parts of the side legs  44  of the first part  35 , in particular profiled strips, and the guide track arrangements  27  disposed on the internal face  25  in the transition regions  47  of the profile legs  8 . Expediently, the guide element  26 , in particular the profiled strip, has a multi-cornered, in particular trapezoidal cross section, in a plane perpendicular to its longitudinal extension. At least one of the guide tracks  48 ;  49 , in particular the guide track  48 , extends parallel with the longitudinal mid-axis  14  of the steering shaft  2 , whilst the other guide track  49  extends at an angle, starting from the base  46 , in the direction towards the profile leg  12  and becomes wider, the farther the distance in the direction of the profile leg  12 . As a result of the guide mechanisms  13  spaced at a distance apart about the mid-axis  34  and inclined towards one another, the support element  9  is guided in the direction parallel with and perpendicular to the longitudinal mid-axis  14  during the process of adjusting the steering shaft  2  when the fixing system  4  is in the released state.  
     [0054] The fixing system  4  co-operating with the adjusting mechanism  3  has at least one, in particular two, adjusting devices  50 ,  51 , which are received on the clamping element  33  so as to be prevented from rotating, and an operating lever  52  mounted so as to be pivotably displaceable by the clamping element  33 . At least one adjusting device  51  is provided between the steering shaft  2  and the support element  9  and at least one other adjusting device  50  is provided between the mount  7  and the operating lever  52 . The adjusting devices  50 ,  51  overlap at least certain regions of a bearing surface  53  of the leg  11  of the mount  7  and a bearing surface  54  in the region of the base  41  of the first part  35  of the support element  9 . Disposed perpendicular to the mid-axis  34 , the bearing surfaces  53 ,  54  extend parallel with one another. Between the adjusting device  50  co-operating with the mount  7  and the operating lever  52 , one or more operating elements  55  with interlocking operating elements  55  are provided, which rotate one on the other and are mounted so as to be pivotably displaced by the clamping element  33 , having tapering operating faces to enable a pivoting motion from a released disengaged open position into a fixing locking position in a direction perpendicular to the circumferential direction of the operating elements  55 . In practical terms, one of the operating elements  55  is fixed to the adjusting device  50  so as to be displaced with it, whilst the other operating element  55  is fixed to the operating lever  52  so as to be displaced with it, in particular welded, brazed, screwed, riveted, etc.. As the operating lever  52  is pivoted from a located locking position into a disengaged open position, the adjusting devices  50 ,  51  are shifted into a released or disengaged, uncoupled open position due to the mutual support of the mutually facing operating faces of the oppositely lying operating elements  55  against the action of resilient return forces.  
     [0055] Naturally, any type of operating element  55  known from the prior art which is able to act against resilient return forces may be used, such as eccentric plates, cam plates, etc.. More details of the structure and operating mode of the fixing system  4  will be given with reference to the other drawings.  
     [0056] As may also be seen from FIG. 2, the clamping element  33  in its assembled position is positioned by means of a plastic plate  56  arranged between the profiled piece  8  and the support element  9  and a sheet metal plate  57  arranged on top of and parallel therewith. The metal plate  57  and the clamping element  33  may be joined by any type of form-fitting and/or friction-locking connecting elements known from the prior art. The operating lever  52 , the operating elements  55  and the adjusting devices  50 ,  51  are disposed in a substantially clearance-free arrangement relative to one another, releasably fixed as necessary, in the longitudinal direction of the clamping element  33  by means of a fixing arrangement  58  provided on the free end of the clamping element  33 , in particular a screw arrangement.  
     [0057] FIGS.  3  to  6 , which will be described together, illustrate the support element  9  in longitudinal section and in cross section. The support element  9 , which is expediently made up of several parts, is provided with semi-cylindrical bearing points  59 ,  60  at the oppositely lying end regions  17 ,  18  for receiving bearings, not illustrated in detail. As may be seen from this drawing, the semi-cylindrical bearing points  59 ,  60  extend concentrically about the longitudinal mid-axis  14  of the steering shaft, not illustrated in detail.  
     [0058] At oppositely lying end regions, a length  61  of the slot  31  is bounded by stop elements  62 . Aligned transversely to the longitudinal mid-axis  14 , the stop elements  62  have a bore accommodating a damping element  63 . For practical purposes, the damping element  63  is made from a plastic material, in particular an elastomer. An adjustment path  64  bounded by the oppositely lying damping elements  63  is at least slightly shorter than the length  61  of the slot  31 . The oppositely lying edges of the slot  31  act as end stops so that if the adjustment path  64  is exceeded, the adjusting device  51  briefly moves into abutment against one of the edges.  
     [0059] As may be also seen from FIG. 3, the bearing surface  54  of the first part  35  of the support element extending parallel with the longitudinal mid-axis  14  is provided with at least one, and in particular several, strip-shaped and flat coupling elements  65  extending parallel with one another in the longitudinal direction. For practical purposes, the coupling elements  65 , in particular a flat support body thereof, are joined to the bearing surface  54  of the first part  35  so as to be stationary by means of an adhesive layer  66 . A length of the coupling elements  65  is at least the same as, and expediently longer than, a length  61  of the slot  31 .  
     [0060]FIGS. 4 and 5 illustrate a part-region of the adjusting device  51  and the support element  9 . The adjusting device  51  preferably consists of a strip-shaped base element  67  with substantially prismatic longitudinal webs  70  oriented in the direction of its longitudinal extension on two oppositely lying longitudinal side regions  68  perpendicular to a base surface  69 , the bearing surfaces  71  of which extending parallel with the base surface  69  are joined to other flat coupling elements  72 , and at least one elastically deformable return element  74  disposed between a strip-shaped guide element  73  and the base element  67 . In a located, fixing, locking position, a pressing force generated by at least one return element  74  is applied to the mutually locatable coupling elements  65 ,  72 . The pressing force of the adjusting devices  50 ;  51  is applied to at least one of the coupling elements  65 ;  72 . The adjusting device  50  is not illustrated in detail in FIGS. 4 and 5.  
     [0061] As may be seen more clearly from FIG. 6, the longitudinal webs  70  may be integrally formed on the base element  67  in a single piece or joined to it by means of a form-fitting and/or friction-locking connecting element. A width  75  of the base element  67  measured transversely to the longitudinal mid-axis  14  spaces two mutually parallel longitudinal side faces  76  apart from one other, extending perpendicular to transverse side faces  78  mutually spaced apart from one another by a length  77 . In a bottom face  79  lying opposite the base surface  69  is a cut-out for providing a non-rotating mount for the clamping element  33 . A longitudinal mid-axis  80  and a transverse mid-axis  81  extending perpendicular thereto form a common intersection for a bore  82  through which the clamping element  33  is inserted. The longitudinal mid-axis  80  extends parallel with the longitudinal mid-axis  14  of the steering shaft  2 . At the distal end regions  83  of the base element  67 , preferably in the peripheral region thereof and aligned perpendicular to its base surface  69 , are substantially prismatic guide and/or stop elements  84 , which project into the slot  31 . A width of the guide and/or stop elements  84  is at least smaller than an orifice width of the slot  31 . The side faces of the base element  67  disposed at right-angles to the longitudinal side faces  76  extend congruently with the stop surfaces  85  of the guide and/or stop elements  84 , as may be seen from FIG. 6.  
     [0062] The width  75  of the base element  67  is expediently slightly smaller than the widthways dimension  42  in the region of the base  41  of the support element  9 . The strip-shaped coupling element  72  is joined by means of an adhesive layer  66  to the bearing surface  71  of the longitudinal web  70 . The base element  67  may co-operate with a strip-shaped coupling element  72  or several coupling elements  72  distributed across the base surface  69  of the base element  67 . A coupling element width  86  of the coupling element  72  arranged on the base element  67  is expediently the same as a coupling element width  87  of the coupling element  65  cooperating with the first part  35  of the support element  9 . Naturally, it would also be possible for one of the two coupling element widths  86 ;  87  to be bigger or smaller.  
     [0063] The strip-shaped guide element  73  supported on the return element  74  has a surface extending in a plane parallel with the bearing surface  54  of the first part  35 . At its distal end regions incorporating the guide and/or stop elements  84 , the guide element  73  has matching recesses so that the guide element  73  is accommodated between the guide and/or stop elements  84  and the oppositely lying longitudinal webs  70  in the widthways direction.  
     [0064] For the sake of simplicity, the adjusting device  50  is illustrated in FIG. 2 only, but the bearing face  53  of the leg  11  of the mount  7  directed towards the adjusting device  50  has at least one, in particular several, parallel coupling elements  65  spaced at a distance apart from one another in the longitudinal extension of the orifice  30 . For practical purposes, the coupling elements  65  are spaced apart from one another by at least the width  29  of the orifice  30 .  
     [0065] The mutually locatable coupling elements,  65 ,  72  form a coupling system  88 , which may be releasable if necessary, between at least two, preferably flat parts  89 ,  90  or elements, which are adjustable relative to one another. The relatively adjustable parts  89 ,  90  constitute the adjusting mechanism  3 . This being the case, the first part  35  of the support element  9  and the legs  11  of the mount  7 —not illustrated in FIGS.  3  to  6 —form a first part  89 , whilst at least a part-region of the adjusting devices  50 ,  51 , in particular the base element  67 , forms the other part  90 .  
     [0066] As in the preceding embodiments, the mount  7 , the support element  9 , in particular the first part  35 , as well as the adjusting devices  50 ,  51 , in particular the base element  67 , are made from a metal and/or non-metal material, on the mounting surfaces or bearing surfaces  53 ,  54 ,  71  or base surface  69  of which coupling elements  65 ,  72  are provided, at least in certain regions.  
     [0067] FIGS.  7  to  9 , which will be described together, show a part-region of the first part  89 , in particular the support element  9 , and the other part  90 , in particular the base element  67 , of the adjusting device  51 , which can be located with one another via a coupling device  88 . As described in detail above, the first coupling element or elements  65  are joined to the bearing surface  54  of the first part  89 , in particular the first part  35  of the support element  9 , by means of an adhesive layer  66 .  
     [0068] The other coupling elements  72  lying opposite the coupling element or elements  65  are joined by the adhesive layer, in particular at the flat support body, to the bearing surfaces  71  of the longitudinal webs  70  of the other part  90 , in particular the base element  67 . As illustrated in this drawing, the coupling elements  65 ,  72  are disengaged and therefore in a released open position. The coupling elements  65  arranged in the longitudinal direction in a region bordering the slot  31  are spaced at a distance apart from one another in the widthways direction and extend parallel with one another and parallel with the slot  31 . The coupling elements  65 ,  72  have several coupling parts  91 , which are preferably spaced apart from one another in the direction of the coupling element width  86 ,  87 , which extend perpendicular, starting from a preferably flat support body  92 , in the direction of the base element  67 . The coupling parts  91  are expediently arranged on a surface of the entire support body  92  of the coupling elements  65 ,  72  in rows in the direction of the length and/or coupling element width  87  thereof or diagonally offset from one another. The coupling elements  65 ,  72  therefore have a plurality of coupling parts  91  distributed across a bearing surface  53 ,  54 ,  71  or a support body  92 , which essentially locate in a form-fit with one another in a fixing, locking position and releasably fix the parts  89 ,  90  in a relative position. At least one coupling element  65 ;  72  is provided with at least one adjusting element, in particular an electrical, mechanical, etc., actuator.  
     [0069] The coupling elements  65 ,  72 , which are made by an embossing process for example, form recessed or hollowed coupling parts  91 , in which the hollow core  93  of the support body  92  is expediently at least surface-coated and/or completely filled with reinforcing and/or strength-enhancing materials, in particular polymers. An external structured surface  94 , in particular a locating surface or joining surface, of the flat support body  92  of the coupling parts  91  has a plurality of small, in particular microscopic, slightly elastically flexible, reversible projections  95 . Naturally, the surface  94 , in particular the locating surface or joining surface of the support body  92  of the coupling parts  91  may be made using a slightly elastically flexible and reversible coating.  
     [0070] At least part-regions of the surface  94  or locating surface, in particular the projections  95 , are of an elastically flexible design, whereas their core  93  may be made in a flexible or rigid design. The coupling elements  65 ,  72  are joined to the first part  89  and to the other part  90  by the adhesive layer  66 , at least in certain regions.  
     [0071] The coupling parts  91  may naturally be of any geometric shape known from the prior art, such as triangular pyramids, regular polygons, frustoconical bodies, etc., If necessary, they may also be of a thread-type design.  
     [0072] For more detailed information about the different designs of coupling parts  91  of the coupling elements  65 ,  72 , reference may be made to the more detailed disclosures made in patent specification WO 97/13981 A on this subject matter.  
     [0073] As illustrated in FIG. 7 and FIG. 8, the coupling parts  91  are in the shape of a truncated cone, the bigger cross-sectional surface of which sits close to the support body  92 , whilst the smaller cross-sectional surface lying opposite it is close to the base element  67 . A minimum height  96 ;  97  of one of the coupling elements  65 ;  72  is at least slightly bigger than a maximum height  97 ;  96  of the other coupling element  72 ;  65 . As may be seen from this drawing, the minimum height  96  of the coupling element  65  is at least slightly bigger than a maximum height  97  of the coupling element  72 . An acceptance angle  98  is bounded by the surface of the coupling parts  91 . When the coupling elements  65 ,  72  are in a located fixing, closed position a distance  99  between the oppositely lying parts  89 ;  90  is at least slightly bigger than the maximum heights  96 ,  97  of the coupling parts  91 . Consequently, there is no contact with the flat support body  92  which might otherwise damage the coupling parts  91 .  
     [0074] The coupling elements  65 ,  72  may naturally be made from any thermoplastic materials-plastomers containing polyolefins known from the prior art, such as polypropylene, polyethylene and/or polyethylene copolymer, for example. Naturally, it would also be possible to use mixtures of polypropylene and/or polyethylene, for example with a high or low molecular weight. Another option would be to use thermoplastic materials-plastomers containing polyvinyl chloride (PVC), polyamide (PA), such as nylon, polystyrene, polyester, for example.  
     [0075] A height of the return element or elements  74  is bigger than the height  97  of the coupling parts  91  of the other part  90 . At this stage, it should be pointed out that the return elements  74  may naturally be provided by any means known from the prior art, such as helical springs, plate springs, resilient rubber elements or resilient plastics.  
     [0076] The height  96 ;  97  of the coupling parts  91  is between 0.2 and 8 mm, in particular between 0.8 and 4 mm, for example 2 mm. A diameter at the larger cross-sectional surface of the coupling part  91  is between 0.1 mm and 4 mm, in particular between 0.4 and 1 mm, for example 0.8 mm. A diameter as measured at the smaller cross-sectional surface of the coupling part  91  is between 0.05 and 3 mm, in particular between 0.1 and 2.5 mm, for example 0.5 mm. The acceptance angle  98  between external lines at the surface  94  of the coupling parts  91  is between 5° and 40°, in particular between 10° and 30°. A distance between two or more adjacent coupling parts  91  more or less corresponds to the dimensions of the coupling part  91  projecting out in a receiving region.  
     [0077] For more details as to how these dimensions of the coupling parts  91  of the coupling elements  65 ,  72  are selected, reference may be made to the more detailed disclosures made in patent specification WO 97/13981 A in respect of this subject matter.  
     [0078] On the bearing surface  53  of the first part  90 , in particular the mount  7 , at least one, in particular several, coupling elements  65  are likewise provided, in the longitudinal extension of the orifice  30  and extending parallel with the orifice  30 , the length of which is longer than the length  28  of the orifice  30 .  
     [0079]FIG. 9 illustrates a different embodiment of the coupling mechanism  88  between the first part  89 , in particular the support element  9  and/or the mount  7 —not illustrated in detail—and the other part  90 , in particular the base element  67 . Spaced apart from one another in the lengthways and/or widthways direction of the coupling elements  65 ,  72 , the coupling parts  91  have a frustoconical cross-sectional shape with at least one, in particular several, projections  95  extending round the periphery of the surface  94  spaced apart from one another in the longitudinal direction. The projections  95  are polygonal in shape in particular triangular, trapezoidal, etc.. The projections  95  standing proud of the surface  94  preferably have a height and width in the range of between 5 μm and 450 μm, in particular between 250 μm and 400 μm. Side faces of the elastically flexible projections  95  converge, tapering in a radial direction, the greater the distance, for example. As may be seen from this drawing, the coupling elements  65 ,  72  are respectively integral and of the same material. For practical purposes, the two coupling elements  65 ,  72  are made from the same material, in particular thermoplastic polymers. Naturally, it would also be possible for one of the two coupling elements  65 ,  72  to be made from a plastic material of a different strength and/or toughness, in particular thermoplastic polymers.  
     [0080] It should also be pointed out that the support element  9 , the mount  7  and the profiled piece  8  may me made in a single piece or several pieces from ferrous metal or non-ferrous metal or plastics, such as PVC or PA, for example. Naturally, these components made from metal or non-metal materials may additionally be provided with a coating of plastics. The coupling elements  65 ,  72  may naturally be joined to the respective components by any joining process or joining means known from the prior art, such as welding, bonding, or optionally rivets, screws, etc..  
     [0081] The design of the mutually locatable coupling parts  91  of the coupling elements  65 ,  72  enables the coupling mechanism  88  to be used as an energy-absorbing deformation system or safety system. By using appropriate materials, in particular with a high toughness and/or strength, for the coupling parts  91 , in particular their projections  95 , cores  93  or the coupling parts  91  themselves, energy generated as a result of any deformation which occurs in the coupling parts  91  and/or the projections  95  and/or cores  93  due to the force acting in the longitudinal direction of the steering shaft and/ or in a direction extending transversely thereto can be absorbed. As was the case with the drawings above, the coupling parts  91  may be provided with the cores  93 , which specifically have a property enabling them to absorb a high amount of energy. The advantage of this embodiment primarily resides in the fact that even forces or energy occurring in the longitudinal direction of the steering shaft and/or in a direction extending transversely thereto as a result of an accident can stop or largely prevent the steering shaft and a steering wheel from lifting in a direction perpendicular to the longitudinal extension of the steering shaft. Consequently, the risk to which the vehicle passengers are exposed due to shifting or lifting of the steering wheel can be significantly reduced.  
     [0082] It is also of advantage to use a plastic material for the support element  9  and/or the mount  7 , because the coupling elements  65  can be extruded in one or optionally several production processes onto a main body made from plastic. This being the case, the coupling element  65  can be extruded onto the profiled support element  9 , which is expediently made in a single piece, or the mount  7  in one and the same work process. The calibrated and cooled, dimensionally stable support element  9  or mount  7  is heated in a surface region where the coupling elements or elements  65  are to be applied, after which the coupling element or elements  65  are extruded onto the heated region.  
     [0083] In another embodiment, the support element  9  or the mount  7  is heated to such a degree in the region in which the coupling element  65  is to be welded on that the surface region melts. Support elements  9  or mounts  8  of this type, made by the co-extrusion principle, may be calibrated during or after the extrusion process, to ensure that they are made to a sufficient degree of accuracy. Naturally, these components may optionally also be encased in a resistant and chemically resistant protective coating, either in at least parts of their surface or over the entire surface, thereby enabling the stringent requirements of the automotive industry to be met. A method of this type and the plant and machinery needed to implement this method of producing a profiled component, such as the support element  9  or mount  7  are already generally known from the prior art and do not constitute part of the subject matter of this application. Naturally any other method and equipment known from the prior art may be used to make the profiled components. The materials which might be used for the mount  7  and the support element  9  will preferably be polyvinyl chlorides (PVC) and high-strength polyvinyl chlorides or polyamides. The high-strength polyvinyl chlorides will primarily be used to strength part-regions or the entire component, to render it capable of withstanding high stress, such as temperature, chemical reactions, etc..  
     [0084] In another embodiment, the part or parts  89 ;  90  and the coupling elements  65 ;  72  are made from a metal material and the metal coupling parts  91  themselves have elastically flexible projections  95 . The coupling parts  91  of the coupling elements  65 ;  72  are made by an embossing or erosion process. The surface  94  produced as a result may optionally be coated with a plastic material which has an intrinsic elasticity. The dimensions of the coupling parts  91 , such as height, diameter, angle, width etc., substantially correspond to the dimensions of the coupling parts  91  made from plastic  91 . Naturally, the core  93  may also be made from a metal material, the surface  94  of which is covered with a layer of plastic material. Another possibility is to provide metal coupling elements  65 ;  72 .  
     [0085] How the adjusting mechanism operates:  
     [0086] When a position has to be adjusted and fixed, the operating lever  52  is operated to release an adjustment direction—indicated by arrow  100 —of the adjusting devices  50 ,  51 , which are displaceable relative to one another, in the longitudinal extension of the clamping element  33  and the latter are respectively moved back by a same adjustment path  101 . Naturally, the spring constants of the return elements  74  of the adjusting devices  50 ,  51  can be selected so that the coupling mechanisms  88  of the fixing system  4  are brought into engagement simultaneously or, alternatively, the other coupling mechanisms  88  are located after the first coupling mechanisms  88  have been brought into engagement. Accordingly, at least one and expediently several mutually spaced coupling parts  91  of a first coupling element  71  is or are brought into engagement in the direction of the adjustment direction—indicated by arrow  100 —with another oppositely lying coupling element  65  incorporating at least one, in particular several coupling parts  91 . Consequently, each coupling element  65 ,  72  expediently has a plurality of receiving regions  102  between mutually spaced coupling parts  91  which are expediently distributed uniformly across the support body  92 . In a located, fixing, locking position, at least one associated oppositely lying coupling part  91  projects into and engages with this receiving region  102  of the coupling elements  65 ,  72 . For practical purposes, at least one coupling part  91  engages with several respective mutually spaced coupling parts  91  in a form-fit arrangement. At the same time, the surfaces  94  of oppositely lying coupling parts  91  are pressed against one another with at least a slight friction-locking action if necessary in the direction of the adjustment direction—indicated by arrow  100 . By selecting the dimensions accordingly, the coupling parts  91  may be at least lightly clamped to one another as they are pressed one against the other. In the located, fixing position—as illustrated in FIG. 9 showing a different embodiment of the coupling elements  65 ,  72 —the coupling elements  65 ,  72  and their coupling parts  91  and hence also the parts  89 ,  90  are held in position relative to one another, substantially without any clearance, in the direction parallel with the bearing surface  53 ;  54 ;  71  and releasably fixed.  
     [0087] In the located, fixing, locking position, the support element  9  and the mount  7  are releasably fixed in their relative position against the action of the elastically deformable return element or elements  74  by means of a plurality of elastically flexible, reversible projections  95  and the elastically flexible, reversible surfaces  94  of the locatable coupling elements  91 . The adjustment path  101  must be overcome by the interlocking operating elements  55  mounted on the clamping element  33 , in particular a clamping bolt. For practical purposes, the adjustment direction—indicated by arrow  100 —extends parallel with the mid-axis  34  of the clamping element  33  disposed perpendicular to the longitudinal mid-axis  14  of the steering shaft  2 . It should be pointed out at this stage that the adjustment direction illustrated in the drawings—indicated by arrow  100 —corresponds to an engaged position whilst the opposite direction corresponds to a released position, although this is not specifically indicated.  
     [0088] In a released, disengaged open position—as illustrated in FIGS. 7 and 8 for one embodiment of the coupling elements  65 ,  72  illustrated as an example—a pre-definable contact force is applied along the surfaces  53 ,  54  of overlapping guide elements  73  by the expediently clamped return elements  74  of the adjusting mechanisms  50 ,  51  so that an operator only has to apply light forces in order to adjust a steering wheel position. In order to switch from a located, fixing locking position to a disengaged released open position, it is necessary to overcome the adjustment path  101  in a direction parallel with the mid-axis  34  and in a direction opposite the support body  92  of the coupling elements  65  of the support element  9  and mount  7 , in order to disengage the interlocking coupling parts  91 . During the opening process with the operating lever  52 , it is necessary to overcome only the force, in particular the contact force, prevailing between the interlocking coupling parts  91 , since the clamped return element  74  reduces a force needed to open the mutually fixed components, such as mount  7 , profiled pieces  8 , support elements  9 .  
     [0089] During the fixing process, the spring force of the return elements  74  of the adjusting devices  50 ,  51  must firstly be overcome and then a slight increase in force applied once the coupling elements  65 ,  72  are engaged since mechanical forces, in particular contact forces and/or deformation forces have to be overcome in addition during the continued movement in the adjusting direction—indicated by arrow  100 —between the respective mutually locatable coupling parts  91 . The force needed for releasing purposes may therefore be less, by the amount of clamping force in the return element  74 , than a force needed for fixing purposes for which a further clamping force must additionally be overcome. It should be pointed out that the adjustment direction shown in the drawings—indicated by arrow  100 —corresponds to a closing motion and an adjusting direction opposite the closing motion corresponds to an opening motion. The adjusting direction—indicated by arrow  100 —for engaging or releasing the locatable coupling elements  65 ,  72  extends at least at an incline to the bearing surface  53 ;  54 ;  71 , in particular perpendicular to the bearing surface  53 ;  54 ;  71  or to a force-transmitting direction if there is one—indicated by double arrow  103  in FIG. 3 for example. Consequently, the coupling mechanism  88  disposed between the parts  89 ;  90  is suitable for transmitting higher forces and/or torques in a direction parallel with the bearing surface  53 ;  54 ;  71  or in an inclined direction. One or more coupling mechanisms  88  may naturally be provided between the relatively adjustable parts  89 ,  90  one after the other and/or adjacent to one another.  
     [0090] FIGS.  10  to  12 , which will be described together, are highly simplified, schematic diagrams snowing different views of an adjustable vehicle seat  104 . The vehicle seat  104 , comprising a seat part  105 , a back part  106  and a head rest  107 , engages with a guide mechanism  109  which is releasably attached to a body part  108 , in particular a vehicle floor. The seat part  105  and the back part  106  have at least one reinforcing insert  110  each and each of the reinforcing inserts  110  is mounted so as to be pivotable about a pivot axis  111  extending transversely to the longitudinal direction of the vehicle. Accordingly, the pivot axes  111  are linked to one another by the reinforcing inserts  110  of the seat and back parts  105 ,  106  via a pivot part  112 . The reinforcing inserts  110  are of a frame-type design or a flat or skeletal shape, for example, joined at their pivot parts  112  to reinforcing elements  113  spaced at a distance apart from one another in the widthways direction of the seat part  105  and back part  106 . The reinforcing inserts  110  may naturally be of a single-piece or multi-part design and may be made from non-metallic materials or plastics, such as plastic reinforced with glass fibres, etc.. Spaced apart from one another in the widthways direction of the vehicle seat  104  are approximately L-shaped support elements  114 , which between them bear the seat part  105  and the back part  106  in a pivoting arrangement. To this end, the seat part  105  and back part  106  are joined to the support elements  114  by a rod-type bearing element so as to be pivotable  114 .  
     [0091] The support elements  114  are expediently joined to one another by mutually spaced transverse tracks  115  extending between the support elements transversely to the longitudinal direction. The transverse tracks  115  are disposed adjacent to the body part  108 . In the longitudinal extension of the vehicle, between the transverse tracks  115  and the body part  108  and spaced apart from one another relative to the width of the vehicle are rail-type guide mechanisms  109 . The guide mechanisms  109  spaced apart by a width  116  have at least one coupling mechanism  88  between at least two relatively adjustable parts  89 ,  90  forming an adjusting mechanism  117 . The first part  89  is provided in the form of a rail-type guide part  118  and the other part  90  in the form of a guide part seating  119 . The guide part  118  and the vehicle seat  104  joined to the guide part  118  so as to be fixed therewith in displacement is slidable lengthways in the longitudinal direction of the guide mechanisms  109 . The adjustment path or displacement path of the vehicle seat  104  along the guide mechanism  109  is restricted by stop elements  120  provided at the distal end regions of the guide mechanisms  109 . The guide part seating  119  enclosing the guide part  118  in an approximately C-shaped arrangement has oppositely lying lateral guide tracks  121  and height guide tracks  122  extending perpendicular to the lateral guide tracks  121 . The guide parts  118 , which have a substantially T-shaped cross section, and the vehicle seat  104  joined to the guide part  118  so as to be fixed in displacement therewith is guided in the longitudinal direction of the vehicle and in a transversely extending direction essentially without any clearance. The guide part seatings  119  are joined to the body part  108 , in particular the vehicle floor, so as to be stationary. The coupling mechanisms  88  are disposed between the longitudinal side faces which extend parallel with the lateral guide tracks  121  of the guide part seatings  119  forming bearing surfaces  123  and the guide part seatings  119 . The first coupling element  65  is joined by an adhesive layer  66  etc. in a form-fitting and/or friction-locking arrangement to the longitudinal side faces of the guide part  118  constituting a bearing surface  123 . The coupling element  65  extends across at least a part of the length and expediently across the entire length and across at least a part region of the height of the guide parts  118 .  
     [0092] The schematic diagram given in FIG. 12 illustrates the guide mechanism  109  on an enlarged scale. A fixing system  124  co-operating with the adjusting mechanism  117  has at least one coupling mechanism  88  constituting a different embodiment of the coupling mechanism  88 , which has at least two locatable coupling elements  65  and  72 . The coupling element  72  is joined by an adhesive layer  66  etc. to an adjusting device  125  constituting the part  90 , which is provided with at least one elastically flexible return element  74 . The part  90  is provided in the form of a strip-shaped support part. The return element  74  may naturally be provided by any type of elastically flexible elements known from the prior art, such as a helical spring, rubber spring elements, etc. A retaining part  126  of the guide part seating  119 , which is preferably integral with and made from the same material as the guide part seating  119 , preferably has a substantially rectangular cross section and preferably extends across a part-region of the length and height of the guide part  118 . A clamping element  127  aligned with the adjustment direction—indicated by arrow  100 —is retained in a guide bore  128  by the retaining part  126  so as to be guided in a longitudinal sliding arrangement. A longitudinal side face of the retaining part  126  directed towards the bearing surface  123  of the guide part  118  and constituting a bearing surface  129  forms a guide track for a strip-shaped guide element  130  received by the clamping element  127 . The elastic or automatically reboundable return element or elements  74  is or are retained in position in bores in the part  90  or support part disposed parallel with the longitudinal extension of the clamping element. The return elements  74  are slightly biassed. Expediently, a protrusion or head of the clamping element  127  is arranged in a recess disposed in the support part so as to be prevented from turning. For practical purposes, the support part and the guide element  130  are strip-shaped. A free end  131  of the clamping element  127  is provided with a bore  133  through which a connecting element  132  is inserted.  
     [0093] An oblong lever  134  with a rectangular cross section and one or more right-angled bends is retained and mounted so as to pivot by means of two bearing points  135  in its longitudinal extension, disposed on the guide part seating  119  spaced apart from one another by a distance equal to the height of the lever  134 . The bearing points  135  are expediently joined to the guide part seating  119  in a form-fitting and/or friction-locking arrangement. Although not illustrated, the mid-axis of one of the bores in the bearing points  135  for inserting a bolt forms the pivot axis about which the lever  134  is pivoted. At an end region lying opposite the handle part  136  of the lever  134 , the lever is articulatingly linked to the connecting element  132 , which extends through the bore  133  of the clamping element  127 . To this end, the lever  134  has a blind bore in this end region, through which the connecting element  132 , in particular a bolt, extends.  
     [0094] When the lever  134  is not being operated, the fixing system in particular the coupling elements  65  and  72  of the coupling mechanism  88 , automatically engage, in which case the relatively adjustable parts  89 ,  90  are releasably fixed to one another in their adjusted relative position relative to the body part  108 . When the lever  134  is operated in the direction towards the guide mechanism  109 , the engaged coupling elements  65 ,  72  are moved apart and disengaged from one another against the action of elastic return elements  74 . As long as the lever  134  is being operated, a relative displacement can be effected between the relatively adjustable parts  89 , in particular the vehicle seat  104 , with respect to the other part  90  which is stationary on the body part  108 , in particular the guide part seating  119 , in the longitudinal direction of the vehicle.  
     [0095] Naturally, the different embodiments of the coupling elements  65 ,  72  described in the preceding embodiments may also be used in this application. Furthermore, the design of the adjusting mechanism  117 , as well as the fixing system  125  co-operating with the adjusting mechanism  117  is described merely as an example of an embodiment.  
     [0096] The coupling mechanism  88  may also be used in vehicle seats  104  which can be pivoted radially to the longitudinal direction of the guide mechanism  109 . A coupling mechanism  88  of this type may also be used to fix a position of an arm rest of the vehicle seat  104 .  
     [0097] In another embodiment, not illustrated the coupling mechanism  88  proposed by the invention is disposed between the back part  106  forming the first part  89  and the support element  114  forming the other part  90  as a means of releasably fixing the relative position of the back part  106  with respect to the seat part  105 . For practical purposes, one of the coupling elements  65  is joined to the support element  114  in a form-fitting and/or friction locking arrangement and the other coupling element  72  is preferably joined in a form-fitting and/or friction locking arrangement to the reinforcing element  113  integrated in the back part  106 . At least one of the coupling elements  65 ;  72  is provided with at least one adjusting mechanism, in particular a mechanical or electrical actuator, for engaging or disengaging the locatable coupling elements  65 ,  72 . This will then provide an easy means of being able to releasably fix a set inclination of the inclination adjusting mechanism of a vehicle seat  104 , an armchair or bench, etc., for example., by providing at least one coupling mechanism  88 .  
     [0098] Naturally a coupling mechanism  88  of this type may be provided between the head rest  107  and the back part  106 , in which case a set height of a height adjusting mechanism for the head rest  107  can be releasably fixed. This being the case, one of the coupling elements  65 ;  72  can be joined to the reinforcing element  113  of the back part  106  and the other coupling element  72  can be joined to at least one of the guide elements of the head rest  107 .  
     [0099] In another embodiment, not illustrated, where the coupling mechanism  88  is provided between two relatively adjustable parts  89 ,  90 , the coupling mechanism  88  for releasably fixes a set height and/or inclination of a height and/or inclination adjusting mechanism for an armchair, in particular a desk chair.  
     [0100] In another embodiment, such as illustrated in FIG. 13, two tubular parts  89 ,  90  are provided, nested one inside the other, and one of the two parts  89 ,  90 , in particular the part  89  lying on the inside, is of an elastically deformable design. The inner part  89 , which is air tight, is closed off from the ambient air in an airtight arrangement and has a pre-definable intrinsic stiffness. The part  89  has a connecting line, not illustrated, providing a connection to a working medium, in particular air, liquid, etc., and can be alternately pressurised.  
     [0101] The inner part  89  has an outer periphery forming a bearing surface  137  in at least certain regions, in the form of segments  138  with coupling elements  139  and an inner periphery of the outer part  90  forming a bearing surface  140  directed towards the outer periphery  137  of the inner part  89  has a flat coupling element  141 . The pressure applied to a cavity  142  of the inner part  89  causes a radial widening of the latter, producing a form-fitting engagement of the mutually facing coupling parts  91  of the coupling elements  139 ,  141  and thus fixes the relative position of at least two relatively adjustable parts  89 ,  90 .  
     [0102] The parts  89 ,  90  may be a moulded tube and a flexible pipe element, for example.  
     [0103] If the over-pressure prevailing in the cavity  142  is adjusted to ambient pressure or if it is switched to a pressure blow atmospheric pressure, in particular is reduced to a vacuum pressure, the elastically flexible part is returned to its original initial state. The coupling elements  139 ,  141  are then totally disengaged. The advantage of this solution primarily resides in the fact that it enables a pre-definable relative position of the parts  89 ,  90  to be fixed and locked by a rapid cycle time which is exclusively dependent on the cycle time needed to apply the pressure. The part  89  with a pre-definable intrinsic stiffness or elasticity resumes its original position when ambient pressure prevails in the cavity  142 . As a result of the small dimensions of the coupling parts  91 , only a short adjustment path is needed in the radial direction towards the parts  89 ;  90 .  
     [0104] Naturally, if using a support body with an elasticity for the coupling element  139 , it will extend across the entire outer periphery of the tubular part  89 .  
     [0105] At least part regions of one of the tubular parts  89 ,  90 , in particular the inner part  89 , is designed to be elastically deformable in a radial direction towards the bearing surface  139 ;  140 . The part  89  has a line connection via a connecting line to an adjusting mechanism, in particular a pneumatic or hydraulic actuator, in order to pressurise the cavity  142 .  
     [0106] In order to engage or disengage the locatable coupling elements  139 ,  141 , at least one of them is pressurised alternately in a radial direction towards the bearing surface  137 ,  140 .  
     [0107] In another embodiment, not illustrated, the coupling mechanism  88  is arranged between two relatively displaceable parts  89 ,  90  and the coupling mechanism  88  is used to releasably fix a set height of a belt height adjusting mechanism.  
     [0108] As with the embodiments described above, only manually operated adjusting mechanisms  3 ;  117  and the fixing systems  4 ;  124  co-operating with them are illustrated. This type of adjusting device  50 ;  51 ;  125  for the fixing systems  4 ;  124 , in particular the coupling mechanism  88  between two relatively adjustable parts  89 ,  90  could naturally also be operated by electric, pneumatic or hydraulic actuators. The actuator drives may have flat slide tracks, adjusting elements, etc., in a working connection with the coupling elements  65 ;  72 , which move one of the coupling elements  72  into engagement with the other coupling elements  65  once pressure, force, torque or current is applied. Actuators of this type used for the fixing system  4 ;  124  and adjusting mechanism  3 ;  117 , which are controlled and regulated by at least one control system and at least one operating system, are generally known from the prior art and do not form part of the subject matter of this application.  
     [0109] In another embodiment, not illustrated, when the weight of a seat occupant is detected, at least one other fixing system  4 , in particular another adjusting mechanism  50 ;  51 , is optionally connected in series between the operating lever  52  and the mount  7  and between the steering shaft  2  and the support element  9  in the direction of the steering shaft  2  or is connected in parallel transversely to the steering shaft  2 . Naturally, this approach may also be used with all the other embodiments. The specific advantage of this is that under the action of a force or energy in the longitudinal direction of the steering shaft  2  and/ or in a direction transversely thereto, the contact force and the force for fixing the steering shaft  2  relative to the mount  7  is increased, thereby making it more difficult for the steering shaft  2  to slide in its longitudinal direction or preventing it altogether, so that a higher proportion of energy can be absorbed.  
     [0110]FIGS. 14 and 15, which will be described together, illustrate another embodiment of the coupling elements  143 , which are shown in the disengaged position in FIG. 14 and in the mutually located position in FIG. 15. The mutually locatable coupling elements  143  are made from a single piece or multiple parts or have a single layer or several layers and their coupling parts  91  are at least slightly elastically flexible and reversible, and bearing regions  144  are provided between them for at least one other coupling part  91  formed by the other coupling element  143 . As illustrated in this preferred embodiment, the coupling parts  91  have a pyramid-shaped or conical cross section. The coupling parts  91  of the coupling elements  143 , which have an inherent elasticity and are distributed along a surface  145 , preferably uniformly. are elastically and reversibly deformable in three spatial directions and when pressure is applied at least one coupling element  143  is forced and/or pushed back on its self and elastically deformed in the direction of the bearing region  144  of the other coupling element  143 . The surface  145  forms a locating surface co-operating with the bearing surface  53 ;  54 ;  71 ;  123 ;  129 ;  137 ;  140 —not illustrated in this drawing—for receiving the coupling element  143  in position. Naturally, the bearing surface  53 ;  54 ;  71 ;  123 ;  129 ;  137 ;  140  may be recessed in the part  89 ;  90 , in which case the coupling parts  91  of the other coupling element  143  project into this recess, in order to engage.  
     [0111] The coupling elements  143  are preferably respectively joined to the parts  89 ,  90  by an adhesive layer  66 —not illustrated. As illustrated in this embodiment shown as an example, the coupling element  143  is provided with a flat support body  92  disposed between the coupling parts  91  and the surface  145 , on which the coupling parts  91  are distributed, preferably uniformly, at a support body surface  146  remote from the surface  145  forming a connecting surface. The support body forming the integral coupling element  143  with the coupling parts  91  may have properties that are the same as or different from the coupling parts  91  in terms of toughness, strength, etc.. The coupling parts  91  distributed along the support body surface  146  of the support body, preferably uniformly, are bounded by side faces forming support faces  147  starting from the support body surface  146  and converging with one another in the opposite direction. The coupling parts  91  may naturally be provided with bead-shaped projections  95  standing proud of the support surface  147 —as indicated by broken lines—which are spaced at least slightly apart from one another in the direction of the height  96  of the coupling parts  91 . Clearly, in the region of a profiled surface or the support surfaces  147  of the coupling parts  91  forming it, it would also be possible to provide an elastically flexible and reversible coating totally covering it, although this is not illustrated. This layer may be made from a plastic material with different properties from the coupling parts  91 . In practical terms, the layer is made from a material with a higher elasticity, in particular a plastic material. The layer itself expediently has a wave-shaped mating or profiled surface.  
     [0112] As may be seen from FIG. 14, the oppositely lying coupling elements  143  may have different separating distances  148   a,    148   b  between two couplings parts  91  of the coupling element  143  arranged one immediately after the other, so that the oppositely lying part-regions of the coupling elements  143 , in particular the coupling parts  91 , which can be brought into engagement with one another are deformed when a pressure or force is applied—as indicated by arrow  149 —by at least one of the parts  89 ;  90 , as may be seen from FIG. 15. The pressure or force which may be applied—as indicated by arrow  149 —if necessary by adjusting devices  50 ,  51  may be provided by any electric, hydraulic, pneumatic or hybrid actuators known from the prior art.  
     [0113] Naturally, another possibility would be for the mutually locatable coupling elements  143  to have an identical separation  148   a,    148   b  but a different number of coupling parts within the same length. This shift or offset of at least one bearing region from at least one coupling part  91  results in an enhanced form-fitting and/or friction locking action between the coupling elements  143  in the lengthways and/or widthways direction of the flat locatable coupling elements  143 . If one of the separating distances  148  of the locatable coupling elements  143  is bigger or smaller, several coupling parts  91  of the oppositely lying coupling element  143  may optionally be forced simultaneously into the bearing region  144  in which the support surfaces  147  slide against one another as the coupling parts  91  of the locatable coupling element  143  interlock. In order to make it easier for several coupling parts  19  of a coupling element  143  to be forced into one bearing region  144  of the other coupling element  14 , the flank angles  150  may be of a different inclination. It would, of course, also be possible for the side flank  150  of the coupling parts  91  of the oppositely lying coupling elements  143  to have an identical inclination, in which case several coupling parts  91  separated from one another by the bearing region  144  project into the oppositely lying bearing region  144  of the other coupling element  143  when pressure or a force is applied—as indicated by arrow  149  and as pressure continues to be applied—indicated by arrow  140 —the inclined support surfaces  147  are elastically and reversibly deformed into the bearing region  144  of projecting coupling parts  91 .  
     [0114] The coupling parts  91  projecting into the bearing region  144  of the oppositely lying coupling element  143  in the engaged position overlap with the coupling parts  91  of the oppositely lying coupling element  143  in at last certain regions, as a result of which the locatable coupling elements  143  are supported against one another and at least lightly clamped in at least certain regions and held positioned in their mutual relative position. The bearing regions  144  thus form an absorption region.  
     [0115] The embodiments illustrated in FIGS. 14 and 15 can naturally also be used with all the other embodiments described in connection with FIGS.  1  to  13 , in which case at least two relatively adjustable parts  89 ,  90  in a motor vehicle can each be provided with a coupling element  143  and these can be adjusted at least at an angle to, in particular perpendicular to the bearing surface in order to produce an engaging and disengaging action. To this end, at least one of the parts  89 ,  90  is provided with an adjusting device  50 ;  51 ;  125 , as described in connection with above-mentioned drawings. Naturally, the two parts  89 ,  90  may be designed so as to be adjustable relative to one another.  
     [0116] When the coupling elements  143  are brought into a released, disengaged open position, the elastically deformed coupling parts  9  are automatically deformed back again. As a result of the clamping action in at least certain regions of the coupling parts of the oppositely lying locatable coupling elements  143 , a substantially form-fitting and/or friction locking connection, which may be released as necessary, is produced between the coupling elements  143  and the relatively positioned parts  89 ,  90 . The coupling parts  91  of the coupling element  143  projecting at least slightly towards the bearing surface are disposed on a support body  92  or applied directly to the latter by a co-extrusion process, etc..  
     [0117]FIGS. 16 and 17, which will be described together, show a different embodiment of the locatable coupling elements  143 , FIG. 16 illustrating the coupling elements  143  in a disengaged state and FIG. 17 illustrating the coupling elements  143  in an engaged state. The coupling elements  143  are also of a flat design and may be made as a single piece or in several parts or as a single layer or several layers. As illustrated in the drawings, the coupling elements  143  have a flat support body  92 , which is directly joined to the part  89 ,  90  by an adhesive layer  66 . The support body  92  is integrally formed and the properties may be the same as or different from the coupling part  91 . In the particular embodiment described here, the coupling element  143  is at least one coupling part  91  with a surface profile  151 , which may have a regular or irregular recurring ripple  152  pattern. The surface profile  151  is made up of several adjacent, regularly or irregularly spaced profile crests  153  and profile troughs  154 , in which a maximum height  155  and a maximum depth  156  are bounded by a base profile  157  and a reference profile  158 . Between the base and the reference profiles  157 ,  158 , the profile crests  153  and profile troughs  154  may have a same or shorter height  155  or depth  156 . It should be pointed out that the height  155  and depth  156  is measured respectively between a mean profile  159  lying between the base and reference profiles  157 ,  158 . An opening width  161  of a profile trough as measured at the mean profile  159  on a profile surface  160  and between two adjacent coupling parts  91  may be the same as or different from the other opening widths  161  of the other profile troughs  154 .  
     [0118] As may also be seen from FIG. 16, the other coupling element  143  which may be releasably located with the first coupling element  143  as necessary is provided with the coupling part  91  incorporating a surface profile  151  made up of several profile crests  153  and profile troughs  154  arranged one after the other. These profile crests  153  and profile troughs  154  may have the same heights  155  and depths  156  as one another and/or as the profile crests  153  and profile troughs  154  of the oppositely lying coupling element  143 . A maximum depth  156  of at least one profile trough  154  of the first coupling element  143  may naturally also be smaller than or the same as or bigger than the depth  156  of the profile trough  154  of the other coupling element  143 . The same also applies to the maximum height  155  of the profile crests  153  of the first and other coupling element  143 .  
     [0119] As may be seen more clearly from FIG. 17, the profile crests  153  and profile troughs  154  of the locatable coupling elements are of an elastically flexible and reversible design so that even if at least two profile crests  153  of the two coupling elements  143  come into contact with one another or abut against one another they are elastically deformed so that as the two profile crests  153  come into contact with one another, material is forced into the profile trough  154  or profile troughs adjacent to the profile crest  153  so that the profile crests  153  are received in essentially corresponding profile troughs  154  in certain regions only. As described above, force is applied—as indicated by arrow  149 —to at least one of the parts  89 ;  90  in order to engage the coupling elements  143  and expediently remains active for the entire duration of the coupled engaged position of the coupling elements  143 . As a result of the elastic deformation of the profile crests  153  and/or profile troughs  154  forming the coupling parts and due to the action of the force being applied—as indicated by arrow  149 —an increased contact pressure and hence a friction force is obtained between the coupling elements  143  so that the mating or locatable coupling elements  143  are able to transmit force in a direction parallel with the bearing surface  162  of the parts  89 ,  90 . Another major advantage of this embodiment is that in a located engaged position, even if a maximum height  155  of the profile crest  153  is bigger than a minimum depth  156  of a profile trough  154 , on the one hand the coupling elements  143  can not be damaged because at least one profile crest  153  and/or at least one profile trough  154  will be elastically deformed whilst on the other hand nevertheless reliably fixing a relative position between two relatively adjustable parts  89 ,  90 . Naturally, it would also be possible for the properties of the two mutually locatable coupling elements  143  to be different.  
     [0120] The locatable coupling elements  143  are disengaged by moving them towards one another in opposite directions against the action of the applied pressure—indicated by arrow  149 —so that the elastically flexible and reversible coupling elements  143  and their coupling parts  91  automatically resume their original starting position. As a result, the profile crests  153  and profile troughs  154  of the locatable coupling elements  143  are only partially in an interlocking engaged position. The specific advantage of this is that it achieves a situation in which the profile crests and profile troughs  153 ,  154  which can be engaged with one another in a form-fitting arrangement can be so to a degree of approximately 30 to 100%, in particular between 50 and 90%, for example 70%, and this will be sufficient to be able to transmit pre-definable forces in the direction parallel with and/or at an angle to the bearing surface  162 . The remaining form-fitting and friction-locking interlocking proportion, in other words 70 to 0%, in particular between 50% and 10%, for example  30  %, of the profile crests and profile troughs  153 ,  154  are elastically deformed in certain regions. It should be pointed out that the proportion, as a percentage, is measured on the basis of the coupling parts  91  and profile crests  153  and profile troughs  154  distributed on the support body surface  146  or the surface  145 . For example, it would also be possible for one of the coupling elements  141 ;  143  to have a different property, for example in terms of its strength, toughness, modulus of elasticity, etc., which will enable a low-force deformation of at least one profile crest  153  of the first coupling element  141  on at least one profile crest  153  of the other coupling element  143 . This will also enable different requirements to be accommodated, such as reliably securing the engaged coupling elements  141 ,  143  to prevent them from coming apart.  
     [0121] In another embodiment, not illustrated, the coupling parts  91  are provided in a filament-type arrangement and when the pressurised coupling elements  65 ,  72 ;  141 ,  143  are brought into engagement with one another they are bent over and/or wrapped and/or enclosed in certain regions. When the substantially cylindrical surfaces of the coupling parts  91  of the coupling elements  65 ,  72 ;  141 ,  143  are brought into direct contact with one another, an increased friction lock is produced between them, which enables high forces to be transmitted in a direction substantially parallel with the bearing surface  53 ;  54 ;  71 ;  123 ;  129 ,  137 ,  140 ;  162 . These filament-type coupling parts  91  are expediently disposed on the flat support body  92 , which is joined by the adhesive layer  66  for the form-fitting and/or friction-locking connecting element to the part  89 ,  90 . The coupling parts  91  are separated from one another by a bearing region.  
     [0122] As a result of the embodiments described above and illustrated in FIGS.  1  to  17 , higher thrust forces in particular can be transmitted, essentially acting in the direction parallel with the bearing surface  53 ;  54 ;  71 ;  123 ;  129 ,  137 ,  140 ;  162  without causing the parts  89 ,  90  to shift. The thrust forces may be approximately between 1% and 30%, for example 5% and 20%, greater than a pressing force needed for the locating action to lock the parts  89 ,  90 .  
     [0123] Finally, it should be pointed out that in order to retain clarity in the drawings, the coupling elements  65 ,  72 ,  141 ,  143  of the coupling mechanism  88  are illustrated in highly simplified and very enlarged diagrams and only a few coupling parts  91  are shown. However, the coupling elements  65 ,  72  are in fact provided with a plurality of coupling parts  91 . Naturally, several coupling mechanisms can be provided one after the other and/or adjacent to one another between the parts  89  and  90 , and hence distributed across the bearing surface  53 ,  54 ,  71 ,  123 ,  129 ,  162 . In particular, the embodiments and applications illustrated in FIGS.  14  to  17  may also be transposed to the embodiments and applications illustrated in FIGS.  1  to  13 .  
     [0124] For the sake of good order, finally, it should be pointed out that in order to provide a clearer understanding of the coupling mechanism  88  and the coupling elements  65 ,  72 ,  139 ,  141 ,  143 , they and their constituent parts are illustrated to a certain extent out of proportion and/or very much magnified and/or on a smaller scale. The independent solutions proposed by the invention to the set task may be found in the description.  
     [0125] Above all, the individual embodiments and features of the subject matter illustrated in FIGS. 1, 2;  3 ,  4 ,  5 ,  6 ;  7 ,  8 ,  9 ;  10 ,  11 ,  12 ;  13 ;  14 ,  15 ;  16 ,  17  may be construed as independent solutions proposed by the invention. The objectives and associated solutions proposed by the invention may be found in the detailed descriptions of these drawings.  
     [0126] List of reference numbers  
     [0127] 1  Steering shaft adjusting unit  
     [0128] 2  Steering shaft  
     [0129] 3  Adjusting mechanism  
     [0130] 4  Fixing system  
     [0131] 5  Fixing means  
     [0132] 6  Body  
     [0133] 7  Mount  
     [0134] 8  Profiled piece  
     [0135] 9  Support element  
     [0136] 10  Base  
     [0137] 11  Leg  
     [0138] 12  Profile leg  
     [0139] 13  Guide mechanism  
     [0140] 14  Longitudinal mid-axis  
     [0141] 15  Double arrow  
     [0142] 16  Double arrow  
     [0143] 17  End region  
     [0144] 18  End region  
     [0145] 19  Bearing  
     [0146] 20  Bearing  
     [0147] 21  Length  
     [0148] 22  Length  
     [0149] 23  Length  
     [0150] 24  Pivot axis  
     [0151] 25  Internal face  
     [0152] 26  Guide element  
     [0153] 27  Guide track arrangement  
     [0154] 28  Length  
     [0155] 29  Width  
     [0156] 30  Orifice  
     [0157] 31  Slot  
     [0158] 32  Bore  
     [0159] 33  Clamping element  
     [0160] 34  Mid-axis  
     [0161] 35  Part  
     [0162] 36  Part  
     [0163] 37  Height  
     [0164] 38  Wall thickness  
     [0165] 39  Height  
     [0166] 40  Wall thickness  
     [0167] 41  Base  
     [0168] 42  Widthways dimension  
     [0169] 43  Connecting region  
     [0170] 44  Side leg  
     [0171] 45  Side leg  
     [0172] 46  Base  
     [0173] 47  Transition region  
     [0174] 48  Guide track  
     [0175] 49  Guide track  
     [0176] 50  Adjusting device  
     [0177] 51  Adjusting device  
     [0178] 52  Operating lever  
     [0179] 53  Bearing surface  
     [0180] 54  Bearing surface  
     [0181] 55  Operating element  
     [0182] 56  Plastic plate  
     [0183] 57  Sheet metal plate  
     [0184] 58  Fixing arrangement  
     [0185] 59  Bearing point  
     [0186] 60  Bearing point  
     [0187] 61  Length  
     [0188] 62  Stop element  
     [0189] 63  Damping element  
     [0190] 64  Adjustment path  
     [0191] 65  Coupling element  
     [0192] 66  Adhesive layer  
     [0193] 67  Base element  
     [0194] 68  Longitudinal side region  
     [0195] 69  Base surface  
     [0196] 70  Longitudinal web  
     [0197] 71  Bearing surface  
     [0198] 72  Coupling element  
     [0199] 73  Guide element  
     [0200] 74  Return element  
     [0201] 75  Width  
     [0202] 76  Longitudinal side face  
     [0203] 77  Length  
     [0204] 78  Transverse side face  
     [0205] 79  Bottom face  
     [0206] 80  Longitudinal mid-axis  
     [0207] 81  Transverse mid-axis  
     [0208] 82  Bore  
     [0209] 83  End region  
     [0210] 84  Guide and/or stop element  
     [0211] 85  Stop surface  
     [0212] 86  Coupling element width  
     [0213] 87  Coupling element width  
     [0214] 88  Coupling mechanism  
     [0215] 89  Part  
     [0216] 90  Part  
     [0217] 91  Coupling part  
     [0218] 92  Support body  
     [0219] 93  Core  
     [0220] 94  Surface  
     [0221] 95  Projection  
     [0222] 96  Height  
     [0223] 97  Height  
     [0224] 98  Acceptance angle  
     [0225] 99  Distance  
     [0226] 100  Arrow  
     [0227] 101  Adjustment path  
     [0228] 102  Bearing region  
     [0229] 103  Double arrow  
     [0230] 104  Vehicle seat  
     [0231] 105  Seat part  
     [0232] 106  Back part  
     [0233] 107  Head rest  
     [0234] 108  Body part  
     [0235] 109  Guide mechanism  
     [0236] 110  Reinforcing insert  
     [0237] 111  Pivot axis  
     [0238] 112  Pivot part  
     [0239] 113  Reinforcing element  
     [0240] 114  Support element  
     [0241] 115  Transverse track  
     [0242] 116  Width  
     [0243] 117  Adjusting mechanism  
     [0244] 118  Guide part  
     [0245] 119  Guide part seating  
     [0246] 120  Stop element  
     [0247] 121  Lateral guide track  
     [0248] 122  Height guide track  
     [0249] 123  Bearing surface  
     [0250] 124  Fixing system  
     [0251] 125  Adjusting device  
     [0252] 126  Holding part  
     [0253] 127  Clamping element  
     [0254] 128  Guide bore  
     [0255] 129  Bearing surface  
     [0256] 130  Guide element  
     [0257] 131  End  
     [0258] 132  Connecting element  
     [0259] 133  Bore  
     [0260] 134  Lever  
     [0261] 135  Bearing point  
     [0262] 136  Handle part  
     [0263] 137  Bearing surface  
     [0264] 138  Segment  
     [0265] 139  Coupling element  
     [0266] 140  Bearing surface  
     [0267] 141  Coupling element  
     [0268] 142  Cavity  
     [0269] 143  Coupling element  
     [0270] 144  Bearing region  
     [0271] 145  Surface  
     [0272] 146  Support body surface  
     [0273] 147  Support surface  
     [0274] 148   a  Separating distance  
     [0275] 148   b  Separating distance  
     [0276] 149  Arrow  
     [0277] 150  Flank angle  
     [0278] 151  Surface profile  
     [0279] 152  Ripple pattern  
     [0280] 153  Profile crest  
     [0281] 154  Profile trough  
     [0282] 155  Height  
     [0283] 156  Depth  
     [0284] 157  Base profile  
     [0285] 158  Reference profile  
     [0286] 159  Mean profile  
     [0287] 260  Profiled surface  
     [0288] 261  Opening width  
     [0289] 262  Bearing surface