Source: http://www.google.com/patents/US7992936?dq=7125605
Timestamp: 2016-06-30 01:40:28
Document Index: 276297518

Matched Legal Cases: ['art.\n5', 'art.\n27', 'art 4', 'art 4', 'art 4', 'art 5', 'art 5', 'art 5', 'art 4', 'art 5', 'art 4', 'art 5', 'art 5', 'art 4', 'art 5', 'art 4', 'art 5', 'art 4', 'art 4', 'art 4', 'art 4', 'art 4', 'art 4', 'art 4', 'art 5', 'art 5', 'art 5', 'art 4', 'art 4', 'art 5', 'art 4', 'art 5', 'art 4', 'art 5', 'art 4', 'art 5', 'art 4', 'art 5', 'art 4', 'art 4', 'art 5', 'art 5', 'art 3', 'art 5']

Patent US7992936 - Seat - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA seat comprising an underframe and a seat element wherein the seat element comprises a front seat part, a rear seat part, a lower backrest part and an upper backrest part wherein the seat element can be displaced from a basic position into a reclined position, and wherein the seat element comprises...http://www.google.com/patents/US7992936?utm_source=gb-gplus-sharePatent US7992936 - SeatAdvanced Patent SearchPublication numberUS7992936 B2Publication typeGrantApplication numberUS 12/225,335PCT numberPCT/IB2007/000745Publication dateAug 9, 2011Filing dateMar 22, 2007Priority dateMar 24, 2006Fee statusPaidAlso published asCA2643948A1, CA2643948C, CN101534679A, CN101534679B, EP1998649A2, EP1998649A4, EP1998649B1, US8282172, US20100117419, US20110291453, WO2007110737A2, WO2007110737A3Publication number12225335, 225335, PCT/2007/745, PCT/IB/2007/000745, PCT/IB/2007/00745, PCT/IB/7/000745, PCT/IB/7/00745, PCT/IB2007/000745, PCT/IB2007/00745, PCT/IB2007000745, PCT/IB200700745, PCT/IB7/000745, PCT/IB7/00745, PCT/IB7000745, PCT/IB700745, US 7992936 B2, US 7992936B2, US-B2-7992936, US7992936 B2, US7992936B2InventorsJohann Burkhard Schmitz, Carola Eva Marianne Zwick, Roland Rolf Otto Zwick, Claudia PlikatOriginal AssigneeHerman Miller, Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (134), Non-Patent Citations (17), Referenced by (6), Classifications (18), Legal Events (2) External Links: USPTO, USPTO Assignment, EspacenetSeat
US 7992936 B2Abstract
A seat comprising an underframe and a seat element wherein the seat element comprises a front seat part, a rear seat part, a lower backrest part and an upper backrest part wherein the seat element can be displaced from a basic position into a reclined position, and wherein the seat element comprises at least one supporting arm composed of at least one upper support and at least one lower support having an arcuate profile in a transitory region between the rear seat part and the lower backrest part, and wherein the upper support and the lower support are connected at an upper backrest part. At least one guide element guiding the upper support in a front region of the seat part, and at least one connecting link positioning the upper support and the lower support with respect to each other. The front seat pan: being capable of being pulled back by the upper support when the backrest parts are loaded by an individual leaning against them.
1. A seat which comprises:
an underframe; and
a seat element supported by the underframe, the seat element comprising a front seat part, a rear seat part, a lower backrest part and an upper backrest part, wherein the front seat part, the rear seat part, the lower backrest part and the upper backrest part comprise at least one supporting arm, the supporting arm comprising at least one upper support and at least one lower support, the upper support being guided in a region of the front seat part by at least one guide element, the upper support and the lower support being connected to each other in an upper region of the upper backrest part, the upper support and the lower support having an arcuate profile in a transitory region between the rear seat part and the lower backrest part, the upper support and the lower support being positioned with respect to each other in the transitory region by at least one connecting link, and the front seat part being able to be pulled back by the upper support with a pulling-back movement if, when the backrest parts are loaded by an individual leaning against them, the seat element is displaced from an upright position into a reclined position, wherein at least a portion of each of the at least one upper and lower supports experience elastic deformation through bending as the at least one supporting arm is moved between the upright position and the reclined position and wherein an entire of the upper and lower backrest parts bend and rotate in the same direction as the seat element is moved between the upright and reclined positions in response to rearward forces applied to the backrest parts by the individual leaning against them.
2. The seat according to claim 1, wherein the front seat part can be pulled back in a horizontal direction by the pulling-back movement.
3. The seat according to claim 1, characterized in that the front seat part can be raised in a vertical direction by the pulling-back movement.
4. The seat according to claim 1, wherein the supporting arm can be elastically deformed at least in the transitory region between the rear seat part the lower backrest part.
5. The seat according to claim 1, wherein the upper support is guided on the lower support by the guide element.
6. The seat according to claim 1, wherein the upper support is guided on the underframe by the guide element.
7. The seat according to claim 1, wherein the guide element comprises a lever arm which is fastened rotatably to the upper support and rotatably to the lower support.
8. The seat according to claim 1, wherein the guide element comprises a lever arm which is fastened rotatably to the upper support and rotatably to the underframe.
9. The seat according to claim 1, wherein the connecting link between the upper support and the lower support comprises a lever which is connected rotatably in each case to the upper support and the lower support.
10. The seat according to claim 1, wherein the connecting link between the upper support and the lower support is designed as at least one slotted-guide mechanism.
11. The seat according to claim 1, wherein the connecting link between the upper support and the lower support is formed by at least one elastic element which is adhesively bonded to the supports.
12. The seat according to claim 1, wherein the seat has an energy store.
13. The seat according to claim 12, wherein the energy store is adjustable.
14. The seat according to claim 12, wherein the upper support can be pulled back counter to the energy store.
15. The seat according to claim 1, wherein the seat element executes a guided rocking movement in relation to the fixed underframe, with there being approximately an equilibrium of forces between the seat part and the backrest part in every seat position between the upright position and the reclined position.
16. The seat according to claim 1, wherein the lower support is connected to the underframe.
17. The seat according to claim 1, wherein the supporting arm or the upper support thereof and the lower support thereof are curved in an L-shaped manner.
18. The seat according to claim 1, wherein, in the upright position and in the reclined position of the seat, an upper pivotal point of the guide element is located vertically above a lower pivotal point of the guide element, the upper pivotal point being situated further away from the backrest part than the lower pivotal point.
19. The seat according to claim 1, wherein, during a movement of the seat from the upright position into the reclined position, the connecting link is rotatable and displaceable by means of the supports.
20. The seat according to claim 1, wherein the front seat part can be raised by deformation of the supporting arm by an individual leaning back against the backrest part, along a path in the direction of the backrest part, and in that the deformed supporting arm can be re-formed by load alleviation of the backrest part, with the front seat part thereby being lowerable along the path.
21. The seat according to claim 1, wherein the upper support and the lower support of the supporting arm are connected in the transitory region by at least a pair of connecting links.
22. The seat according to claim 21, wherein the upper support and the lower support of the supporting arm (6, 7) are connected in the transitory region by at least three connecting links (12).
23. The seat according to claim 1 wherein the upper and lower supports are integrally formed as a single component.
24. The seat according to claim 1 further comprising a flexible membrane coupled to the at least one supporting arm and defining a body support surface.
25. A seat comprising:
a seat element supported by the underframe, the seat element comprising a front seat part, a rear seat part, a lower backrest part and an upper backrest part, wherein the front seat part, the rear seat part, the lower backrest part and the upper backrest part comprise at least one supporting arm, the supporting arm comprising at least one upper support and at least one lower support, the upper support being guided in a region of the front seat part by at least one guide element, the upper support and the lower support being connected to each other in an upper region of the upper backrest part, the upper support and the lower support having an arcuate profile in a transitory region between the rear seat part and the lower backrest part, the upper support and the lower support being positioned with respect to each other in the transitory region by at least one connecting link, and the front seat part being able to be pulled back by the upper support with a pulling-back movement if, when the backrest parts are loaded by an individual leaning against them, the seat element is displaced from an upright position into a reclined position, wherein the guide element is formed by a slotted-guide mechanism by means of which a free end of the upper support is guided on the underframe.
26. The seat according to claim 25, wherein the slotted-guide mechanism guides the upper support on a curve which rises towards the backrest part.
27. A seat comprising:
a seat element supported by the underframe, the seat element comprising a front seat part, a rear seat part, a lower backrest part and an upper backrest part, wherein the front seat part, the rear seat part, the lower backrest part and the upper backrest part comprise at least one supporting arm, the supporting arm comprising at least one upper support and at least one lower support, the upper support being guided in a region of the front seat part by at least one guide element, the upper support and the lower support being connected to each other in an upper region of the upper backrest part, the upper support and the lower support having an arcuate profile in a transitory region between the rear seat part and the lower backrest part, the upper support and the lower support being positioned with respect to each other in the transitory region by at least one connecting link, and the front seat part being able to be pulled back by the upper support with a pulling-back movement if, when the backrest parts are loaded by an individual leaning against them, the seat element is displaced from an upright position into a reclined position, wherein the supporting arm is formed by a left, upper support and a right, upper support and a lower support situated between them, the lower support being connected to the left, upper support by at least one mechanical connecting link, and the lower support being connected to the right, upper support by at least one mechanical connecting link.
28. The seat according to claim 27, wherein an upwardly directed limb of the lower support is divided into two struts and merges by means of the latter into upwardly directed limbs of the upper supports.
29. The seat according to claim 27, wherein the supporting arm is designed as a single piece.
30. The seat according to claim 27, wherein the upper support is guided on the lower support by a guide element.
31. The seat according to claim 27, wherein the upper support is guided on the underframe by a guide element.
32. A seat comprising:
a seat element supported by the underframe, the seat element comprising a front seat part, a rear seat part, a lower backrest part and an upper backrest part, wherein the front seat part, the rear seat part, the lower backrest part and the upper backrest part comprise at least one supporting arm, the supporting arm comprising at least one upper support and at least one lower support, the upper support being guided in a region of the front seat part by at least one guide element, the upper support and the lower support being connected to each other in an upper region of the upper backrest part, the upper support and the lower support having an arcuate profile in a transitory region between the rear seat part and the lower backrest part, the upper support and the lower support being positioned with respect to each other in the transitory region by at least one connecting link, wherein the seat element is displaced from an upright position into a reclined position in response to a force being applied to the backrest parts by a user, wherein the upper region of the upper backrest part rotates away from the front seat part in response to the force being applied to the backrest parts by the user.
33. The seat according to claim 32, wherein the upper support is guided on the lower support by the guide element.
34. The seat according to claim 32, wherein the upper support is guided on the underframe by the guide element.
The invention relates to a seat which comprises an underframe and a seat element, the seat element comprising a front seat part, a rear seat part, a lower backrest part and an upper backrest part.
DE 42 35 691 C2 describes a seat in which the seat is to be automatically adapted to the body weight of the particular user. A drawback of seats of this type is the enormous constructional complexity which leads to high costs and to the seat being heavy.
The invention is based on the object of developing a seat, in which, in order to provide basic compensation for different body weights of the individuals using the seat, the use of a weighing device in the sense of a complex mechanism, in which movements are used to automatically change spring forces or spring characteristics, is to be omitted.
This object is achieved, for example and without limitation, by the features of claim 1. Advantageous and expedient developments are provided in the subclaims.
The seat according to the invention has a front seat part, a rear seat part, a lower backrest part and an upper backrest part, which comprise at least one supporting arm, the supporting arm being composed of at least one upper support and at least one lower support, the upper support being guided in a region A of the front seat part by at least one guide element, the upper support and the lower support being connected to each other in a region D of the upper backrest part, the upper support and the lower support having an arcuate profile in the region B of the rear seat part and in the region C of the lower backrest part, the upper support and the lower support being positioned with respect to each other in the region B of the rear seat part or in the region C of the lower backrest part by at least one connecting link, and the front seat part being able to be pulled back by the upper support with a pulling-back movement directed towards the backrest parts C, D if, when the backrest part is loaded by an individual leaning against it, the seat element is displaced from a basic position I into a resting position II. By this means, a movement by means of which the seat part is actively pulled back can be produced by the seat element. The active displacement or deformation of the seat element makes it possible to influence the position of an individual sitting on the seat relative to the underframe of the seat and, by this means, to counteract the loss of potential energy when the individual leans back into the resting position II. This compensation takes place in order to keep the restoring force, which has to be applied by the backrest part to comfortably move the individual from the resting position II into the basic position I, low or to make it entirely superfluous. The core of the invention is a seat with at least one supporting arm by means of which an active movement of the front seat part can be produced by a largely defined change in shape.
Furthermore, the invention makes provision, by means of the pulling-back movement, to bring about a movement of the front seat part or of the upper support with a horizontal component or a vertical, upwardly directed component. By means of the movement of the front seat part upwards and in the direction of the backrest part, it is possible, as an individual sitting on the seat leans back, to raise his lower body gently from the basic position I into the resting position II or into any intermediate position by means of the front seat part. By this means, a loss of potential energy due to the lowering of the upper body of the individual can be compensated for by the backrest part. The opposed movements of the seat part and of the backrest part permit a seesaw movement or rocking movement, similar to a seesaw or a beam-balance, of the individual on the seat, which movement can take place very substantially independently of the individual's body weight. A presetting of a spring that is dependent on the body weight of the individual using the seat can therefore be basically or very substantially omitted, since the deformation of the seat element brings about a compensation which is independent of the body weight. That is to say, each individual using the seat forms a counterweight as a function of the body weight with a proportion of the body weight itself and thereby brings about intrinsic compensation.
According to the invention, elastic deformability of the supporting arm or of the upper support and/or of the lower support is provided at least in the region B of the rear seat part and in the region C of the lower backrest part. This makes it possible to change a radius of curvature of the supports and therefore also a relative movement between the two supports, by means of which the front seat part can then also be moved.
According to the invention, the guide element, which guides the upper support in the region of the front seat part on the lower support or on the underframe, is essentially designed as a lever arm which is fastened rotatably to the upper support and rotatably to the lower support or to the underframe. This makes it possible, using simple means, to define a movement on a circular path, which movement has a horizontally directed component and a component directed vertically upwards during a movement from the basic position I into the resting position II.
Alternatively, the invention makes provision to design the guide element as a slotted-guide mechanism in which the upper support is movable in the region of the front seat part relative to the lower support or to the underframe. In the case of a slotted-guide mechanism, a curve on which the front seat part or the upper support moves can be very substantially freely selected. By this means, a complicated coupling mechanism for defining a curve for the movement of the upper support can be omitted.
According to a first variant embodiment, as the connecting link or mechanical connecting link between the upper support and the lower support, the invention provides a lever which is connected rotatably in each case to the upper support and the lower support. This makes it possible to define the profile of a relative movement executed by the two supports during the transition from the basic position I into the resting position II, with the supports being pulled towards each other or pushed apart from each other during their opposed displacement depending on the positioning of the bearing points of the lever. Instead of a lever which is mounted by means of bolts, use of clasps or clips is also provided.
According to a second variant embodiment, the invention makes provision to form the connecting link between the upper support and the lower support by at least one slotted-guide mechanism. It is possible to define, by means of a connecting link of this type, any desired curves on which the supports move during corresponding loading.
According to a third variant embodiment, the invention makes provision to form the connecting link between the upper support and the lower support by an elastic element. This makes it possible to reduce the elastic deformation of the upper and/or lower support, since the bearing element used as the bearing can also be deformed and therefore can store energy. In particular, a rubber block which is adhesively bonded to the supports is provided as the bearing.
The invention provides an energy store which, in particular, is adjustable. By this means, for example, particular seat loads caused, for example, by the body build of individuals using the seat can be compensated for.
The invention provides, as energy store, for example, a spring element counter to which the upper support can be pulled back in the direction of the backrest part. A spring element of this type can be realized with little outlay and requires little construction space.
The invention also provides a guided rocking movement of the seat element on the underframe, with there being approximately an equilibrium of forces between the seat part and the backrest part in every seat position between the basic position I and the resting position II. By this means, the function of the seat is largely independent of the body weight of an individual using the seat.
Furthermore, the invention makes provision to fasten the lower support of the supporting arm to the underframe. By this means, the upper support of the supporting arm obtains the required degrees of freedom in order, despite the guide element, despite the at least one connecting link and despite the connection to the lower support in the region of the upper backrest part, to compensate for the shifting of the weight of an individual using the seat.
The invention also provides an L-shaped profile of the supporting arm or of the supports of the supporting arm in the side view of the seat. This makes it possible to use the supporting arm as a supporting component of the seat element and to use it both to control the sequence of movement of the seat element and to form the seat part itself. In principle, every supporting arm is designed as an arcuate clamp which has two legs running next to each other and at a distance from each other, the legs forming the supports. Between a clamp head, in which the two legs are connected to each other or merge one into the other, and free ends of the legs, the legs are connected by at least one connecting link. The free end of the upper leg of the clamp, which end forms the seat surface or bears the latter, is guided on the lower leg or on the underframe by a guide element.
According to the invention, in the basic position I and in the resting position II, an upper pivotal point of the guide element is located higher than a lower pivotal point of the guide element, the upper pivotal point being at a greater distance from the backrest part than the lower pivotal point. This defines a movement clearance of the front seat part, in which the front seat part rises continuously from the basic position I into the resting position II and moves continuously in the direction of the backrest.
According to the invention, during a loading of the seat element by a person leaning back against the backrest part, the connecting link is rotatable by the supports and is displaceable with the latter. The connecting link therefore constitutes a connection between the supports, which connection permits the supports or the supporting arm to have a delimited movement.
A variant embodiment of the invention provides a seat in which the supporting arm is formed by a left, upper support and a right, upper support and a lower support situated between them, the lower support being connected to the left, upper support by at least one mechanical connecting link, and the lower support being connected to the right, upper support by at least one mechanical connecting link. By this means, with just one supporting arm, a seat or a seat element can be brought about, in which a supporting arm suffices in order to carry a covering which serves as the seat surface and backrest.
Furthermore, in the case of a supporting arm with two upper supports, the invention provides an upwardly directed limb of the lower support, which limb is divided into two struts and merges by means of the latter into upwardly directed limbs of the upper supports. Such a transition of the lower support into the upper supports changes a torsional rigidity of the seat element and is suitable for a single-piece design of the supporting arm.
The invention also makes provision, in the case of a supporting arm with two upper supports, to guide the upper supports on the lower support or on the underframe by means of a respective guide element. The use of two guide elements enables the divided upper support also to be guided along a desired curve.
According to the invention, the front seat part can be raised by deformation of the supporting arm, which is necessitated by an individual leaning back against the backrest part, along a path in the direction of the backrest part, with the supporting arm deformed in such a manner resuming its original shape by load alleviation of the backrest part, and with the front seat part being lowered again along the path mentioned during the re-forming. The lowering of the front seat part makes it easier for the individual to return into an upright sitting position.
Finally, the invention makes provision to connect the upper support and the lower support of the supporting arm in the region of the lower backrest part by at least one connecting link and to connect them in the region of the rear seat part by at least one connecting link. By this means, buckling of the supports during the deformation between the basic position I and the resting position II can be effectively prevented.
In particular, it is also provided to connect a central section of the upper support of the supporting arm and a central section of the lower support of the supporting arm to each other by at least three connecting links. By this means, the forces occurring during the deformation of the supporting arm between the basic position I and the resting position II can be distributed particularly uniformly to the supports. This distribution of the load leads to an increase of the service life of the supporting arm.
Further details of the invention are described in the drawing with reference to schematically illustrated exemplary embodiments.
FIG. 1 a shows: a simplified side view of a first variant embodiment of a seat according to the invention in a basic position I;
FIG. 1 b shows: a perspective schematic diagram of the seat shown in FIG. 1 a; FIG. 2 shows: the seat shown in FIG. 1 a in a resting position II;
FIG. 3 shows: a second variant embodiment of a seat according to the invention in a basic position;
FIG. 4 shows: the seat shown in FIG. 3 in a resting position II;
FIG. 5 shows: a superimposed illustration of the illustrations shown in FIGS. 3 and 4;
FIG. 6 shows: a third variant embodiment of a seat according to the invention in a basic position,
FIG. 7 shows: a simplified perspective illustration of a fourth variant embodiment of a seat according to the invention;
FIG. 8 shows: a simplified side view of a fifth variant embodiment of a seat according to the invention;
FIG. 9 shows: an enlarged illustration of the supporting element of the seat, shown in FIG. 8, in a basic position;
FIG. 10 shows: an enlarged illustration of the supporting element of the seat, shown in FIG. 8, in an intermediate position;
FIG. 11 shows: an enlarged illustration of the supporting element of the seat, shown in FIG. 8, in a resting position;
FIG. 12 shows: a superimposed illustration of the positions, shown in FIGS. 9 to 11, of the supporting element;
FIG. 13 shows: a simplified perspective view of a sixth variant embodiment of a seat according to the invention;
FIG. 14 shows: a simplified perspective view of a seventh variant embodiment of a seat according to
FIG. 15 shows: a perspective view of a seat element of an eighth variant embodiment of a seat according to the invention;
FIG. 16 shows: a side view of the eighth variant embodiment of the seat;
FIG. 17 shows: a further perspective view of the seat element known from FIG. 15, and
FIGS. 18-20 show: side views of a ninth, tenth and eleventh variant embodiment of a seat according to the invention.
FIGS. 1 a to 20 show schematic diagrams of eleven variant embodiments of a seat according to the invention.
FIG. 1 a illustrates a seat 1 in side view. The seat 1 includes a seat element 2 and an underframe 3. The seat element 2 has a seat part 4 which is divided into a front seat part 4 a and a rear seat part 4 b. Furthermore, the seat element 2 has a backrest part 5 which is divided into a lower backrest part 5 a and an upper backrest part 5 b. The seat element 2 includes two supporting arms 6, 7 which are each formed by an upper support 6 a or 7 a and a lower support 6 b, 7 b (also see FIG. 1 b). A fabric 8, which is only visible in FIG. 1 b, is stretched between the two supporting arms 6, 7 and the upper supports 6 a, 7 a thereof. Other body support components, such as a shell or membrane, alone or in combination with the fabric, can also bridge between the two supporting arms. FIG. 1 b shows a simplified perspective view of the seat 1 illustrated in FIG. 1. For simplification, the seat 1 is described in more detail below only in the region of the first supporting arm 6. The upper support 6 a is connected in a region A of the front seat part 4 a to the lower support 6 b by a guide element 9. The guide element 9 is designed as a lever 10 which is connected rotatably at pivotal points D91 and D92 to the upper support 6 a and the lower support 6 b. The second supporting arm 7 is in each case of corresponding design. The supports 6 a, 6 b of the supporting arm 6 merge into each other as a single part in a region D of the upper backrest part 5 b and, according to a variant embodiment (not illustrated), are screwed or riveted to each other. From the region D, the supports 6 a, 6 b have an intermediate space 11 with respect to each other over their entire extent. In particular in a region B of the rear seat part 4 b and in a region C of the lower backrest part 5 a, the supports 6 a, 6 b run in an arcuately curved manner and approximately at the same distance from each other. In this curved region B or C, the two supports 6 a, 6 b are connected to each other by a connecting link 12. The connecting link 12 is designed as a lever 13 which is fastened rotatably to the supports 6 a and 6 b at pivotal points D121 and D122. The underframe 3 has a transverse support 14 to which the right and the left supporting arms 6, 7 of the seat element 2, and in particular the lower seat support are fastened. In particular, the lower seat support is fixedly connected to the support 14. FIGS. 1 a and 1 b both show the seat 1 in a basic position I in which the seat 1 is upright, if it is unloaded or if an individual is sitting on the seat 1 and is not leaning or is only slightly leaning against the backrest part 5.
In one embodiment, the upper support 6 a, 7 a has a cross sectional area of 1 inch2 and a moment of inertia of 0.005000 inch4 in the sections B and C. In various exemplary and suitable embodiments, the cross sectional area can be from 0.3 inch2 to 4 inch2 and the moment of inertia can be from 0.000172 inch4 to 0.011442 inch4. Preferably, the cross-sectional area is at least 0.3 inch2 and the moment of inertia is at least 0.000172 inch4. In one embodiment, the connecting links are spaced apart about 3 inch. In various exemplary embodiments, the connecting links are spaced at least 0.5 inch, but preferably no more than 8 inch. In the section A the moment of inertia of the first upper support 6 a, 7 a increases in direction to front seat part 4 a in comparison with the moment of inertia in the sections B and C. In the section D the moment of inertia of the upper support 6 a, 7 a is comparable with the moment of inertia of the upper support 6 a, 7 a in the sections B and C. In all sections A, B, C and D the lower support 6 b, 7 b is dimensioned comparably to the corresponding section of the upper support 6 a, 7 a. In various exemplary embodiments, the values for the moment of inertia and cross sectional areas differ from the values of the upper support 6 a, 7 a by a factor from 0.5 to 1.5. Preferably the upper and lower support 6 a, 7 a, 6 b, 7 b have a cross sectional area of the same shape. According to the embodiment of FIGS. 1 a and 1 b the cross sectional area has the shape of a rectangle. In various exemplary and suitable embodiments, the cross sectional area of the supports 6 a, 7 a, 6 b, 7 b has the shape of a circle or an oval or a polygon.
The supports can be made, for example and without limitation, of glass filled Nylon, unfilled Nylon, glass filled polypropylene, unfilled polypropylene, polycarbonate, polycarbonate/ABS blend, acetal, or combinations thereof. The connecting links and/or the levers can be made of the same materials, or of various elastomeric materials, including without limitation, Hytrel, Nylon blended with elastomers, thermoplastic urethane or combinations thereof. The connecting links and/or the levers can also be made of rigid materials, including various rigid plastics or metal.
FIG. 2 illustrates the seat 1 known from FIGS. 1 a and 1 b in a resting position II. The seat 1 or the seat element 2 takes up a resting position II of this type if an individual sitting on the seat 1 leans back in an arrow direction x against the backrest part 5. The action of leaning back changes an inner opening angle α of the seat element 2 between the seat part 4 and the backrest part 5 from α=90� (see FIG. 1 a) to α=80� (see FIG. 2). This change in the inner opening angle α is produced by the supporting arm 6 being bent, which takes place essentially in the regions B and C and at the transition of the region B into the region A, and by the front seat part 4 a being raised or inclined. An opening angle W6 relevant to the sitting comfort therefore increases from the basic position I into the resting position II by 10� from W6=90� to W6=100�. By the supporting arm 6 being bent, the upper support 6 a thereof is pulled, in particular in the region A, in the arrow direction x. This leads, because of the guide element 9, to the front seat part 4 a being raised or inclined. Said seat part can only move out of the basic position I, shown in FIG. 1 a, on an arcuate path K9 which is predefined by the guide element 9 and is designed as a circular path K. In other words, the seat element 2 tips or sways or rocks about a rocking point WP in a manner similar to the beam of a beam-balance, with the two supporting arms 6 of the seat element 2 being deformed in the process as a function of their particular position. In the resting position II, not only has an orientation of the guide element 9, which is designed as a lever 10, but also an orientation of the mechanical connecting link 12, which is designed as a lever 13, then changed. When the supporting arm 6 is bent up, the upper support 6 a thereof is forced to describe a relatively large radius. However, this is only possible if the upper support 6 a with the pivotal point D121 for the lever 13 moves approximately in a direction m. The movement of the pivotal point D121 is predefined by the coupling of the upper support 6 a to the lower support 6 b by the mechanical connecting link 12 in order to prevent buckling or to obtain a defined movement. By means of the described active movement or deformation of the seat element 2 or of the front seat part 4 a, an individual sitting on the seat 1 is slightly raised in the region of his thighs as he leans back. This facilitates reaching the basic position I from the resting position II without energy having to be stored to a considerable extent in a spring element. The points of application of the weight of an individual sitting on the seat are therefore changed between the basic position I and the resting position II in order to obtain, as a function of the position of the seat element 2, a position which is oriented to an equilibrium. This makes it largely superfluous, during the leaning-back action, to store potential energy of the upper body in a force store, such as, for example, a spring, since the potential energy of the upper body of an individual is supplied by the kinematics of the seat element to the lower body of the individual as potential energy. For this reason, with the seat according to the invention similar sitting comfort is basically possible even for individuals of very different body weight without a spring having to be adjusted to the weight of the particular individual.
FIGS. 3 and 4 show a second variant embodiment of a seat 1 according to the invention in a basic position I and in a basic position II. Like the first variant embodiment, the second variant embodiment of the seat 1 has two supporting arms 6, the second supporting arm being concealed in the side view. In contrast to the first variant embodiment, in the second variant embodiment a right supporting arm 6 and a left supporting arm are of rigid design at free ends E1, E2 of their supports 6 a, 6 b. The free end E2 of the lower support 6 b therefore behaves, in principle, as an underframe 3, and an elastic region of the lower support 6 b is of shortened design in comparison to the first variant embodiment (see FIGS. 1 a to 2).
In FIG. 5, the illustrations of FIGS. 3 and 4 are shown superimposed. This illustration reveals how a guide element 9, which is designed as a lever 10, rotates by an angle β=25� in an arrow direction w between the basic position I and the resting position II. By this means, a front seat part 4 a is raised at its pivotal point D91 by a height H1 in an arrow direction y and is pushed rearwards by a distance L1 in an arrow direction x. A connecting link 12, which is designed as a lever 13, also rotates in the direction of rotation w, changes its angle by γ=10� and drops slightly.
FIG. 6 illustrates, as an analogy with FIG. 1 a, a third variant embodiment of a seat 1 according to the invention with a seat element 2 in a basic position I. The description for FIGS. 1 a to 2 basically applies to this seat 1. In addition, the seat 1 of FIG. 6 has an energy store or force store 15 which comprises a leaf spring 17 as the spring element 16. The leaf spring 17 is fastened in a lower support 6 b of a first supporting arm 6 and stands in the way of a stop 18 belonging to the energy store 15. The stop 18 is fastened to an upper support 6 a of the supporting arm 6. As soon as the seat element 2 moves from the illustrated basic position I into a resting position (not illustrated here) according to FIG. 2, the stop 18 presses against the leaf spring 17. By this means, the energy store 15 damps the movement of the support 6 a and assists a return movement into the basic position I. By displacement of a contact body 19 of the stop 18 in an arrow direction y′ by, for example, a displacement distance V1, a resetting force produced by the energy store 15 can be adjusted. The embodiment of a corresponding energy store is provided on a left supporting arm of the seat 1, which supporting arm is not visible in the illustration of FIG. 6.
FIG. 7 illustrates a fourth variant embodiment of a seat 1 in a simplified perspective view. The seat 1 includes a seat element 2 and an underframe 3. The seat element 2 has a seat part 4 which is divided into a front seat part 4 a and a rear seat part 4 b. Furthermore, the seat element 2 has a backrest part 5 which is divided into a lower backrest part 5 a and an upper backrest part 5 b. The seat element 2 comprises two supporting arms 6, 7 which are each formed by an upper support 6 a or 7 a and a lower support 6 b, 7 b. A fabric 8, or other body support structure, is stretched between the two supporting arms 6, 7 or the upper supports 6 a, 7 a thereof. The seat element 2 is fastened on a transverse support 14 of the underframe 3 by the lower supports 6 b, 7 b. The supporting elements 6, 7 or the lower supports 6 b, 7 b thereof are furthermore connected to each other via two transverse struts 20, 21 in order to couple the supporting elements 6 and 7 to each other so that the latter can mutually support each other if the seat 1 is loaded on one side. In addition to the transverse support 14, the underframe 3 also comprises a footplate 22 which is connected to the transverse support 14 via a strut 23. The seat 1 is in a basic position I.
FIG. 8 illustrates a fifth variant embodiment of a seat 1 in a simplified side view. A seat element 2 is screwed here by lower supports 6 b of two supporting arms 6 (only one supporting arm is visible in the side view) to a transverse support 14 of an underframe 3 at two fastening points 24, 25. The lower support 6 b and an upper support 6 a of the supporting arm 6 are connected in a region A of a front seat part 4 a via a guide element 9. The guide element 9 is integrally formed as a single piece with the upper support 6 a and the lower support 6 b of the supporting arm 6. In a region B of a rear seat part 4 b and a region C of a lower backrest part 5 a, the upper support 6 a and the lower support 6 b are connected to each other by seven connecting links 12 which are likewise integrally formed as a single piece with said supports. The upper support 6 a is formed in the regions B and C by a central section Q, and the lower support 6 b is formed in the regions B and C by a central section R. Instead of a fabric, in this embodiment the upper supports 6 a of the two supporting arms 6 bear a multiplicity of transverse slats 26 which connect the two supports 6 a. It should be understood that a fabric, or other body support member, is also suitably employed. Only two transverse slats are illustrated by way of example. The guide element 9 and the connecting links 12 are designed as spokes 27 and the latter, like the upper and the lower support 6 a, 6 b, are made from plastic. The seat 1 is in a basic position I.
FIGS. 9, 10 and 11 exclusively illustrate the supporting arm 6 and part of the transverse support 14 of the seat 1 shown in FIG. 8. FIG. 9 shows the supporting arm 6 in the basic position I, FIG. 11 shows the supporting arm 6 in a resting position II, and FIG. 10 shows the supporting arm 6 in an intermediate position III located between the basic position I and the resting position II. In the three positions I-III illustrated, the following values then arise for an opening angle W6 between seat part 4 and backrest part 5, for an angle W4 between the seat part 4 and a horizontal H, for an angle W5 between the backrest part 5 and a vertical V, and for an angle W9 taken up by the guide element 9 with respect to a further horizontal H:
I - Basic position
III - Intermediate position
II - Resting position
The guide element 9 rotates about a pivotal point or elastic region D92 from the basic position I in the clockwise direction in a direction of rotation w into the resting position II (compare FIGS. 9 and 11). In this connection, the guide element 9, which is designed as a spoke 27, is situated in all possible positions between 9 o'clock and 12 o'clock between the basic position I and the resting position II. The angle W9 taken up in this case by the guide element 9 changes from 32� to 46� and therefore increases by β=14� (also see FIG. 12). During the rotation, the guide element 9 raises the upper support 6 a or the region A of the front seat part 4 a at a pivotal point or elastic region D91. In the elastic region D91, the guide element 9 merges into the upper support 6 a. Upon rotation of the elastic region 91 on an arcuate path K9, the region A is raised upwards by a distance H1 in an arrow direction y and is displaced to the right by a distance L1 in an arrow direction x (see FIG. 12). This movement can be described by a type of rocking movement of the supporting arm 6 at a rocking point or rocking region WP. The rocking region here is arranged approximately wherever the lower support 6 b of the supporting arm 6 leaves the transverse support 14 as a cantilever or wherever elastic deformation of the lower support 6 b is possible. The supporting arm 6 is bent up in particular as a result of loading of a region D of an upper backrest part 5 b. The upper support 6 a here, as it is bent up from the lower support 6 b, is pulled rearwards and downwards in the arrow direction x and an arrow direction y′. During this bending-up movement, the upper support 6 a is guided by the guide element 9 and by the connecting links 12 on the lower support 6 b on a multiplicity of paths K9 and K12. As an individual leans back, this pulling-back action of the upper support 6 a causes the upper support 6 a to be raised on the left from a point P6 and causes the upper support 6 a to be lowered on the right from the point P6. Therefore, during the movement into the position II, the seat part 4 is raised and, at the same time, the backrest part 5 is lowered. During the transition from the basic position I into the resting position II, the connecting links 12 all rotate to the right in the arrow direction w about pivotal points or elastic regions D112 on the lower support 6 b. In the process, the elastic regions D112 also change their position by the lower support 6 b being bent up.
FIG. 13 illustrates a sixth variant embodiment of a seat 1 according to the invention in a simplified perspective view. A seat element 2 is essentially formed solely by a supporting arm 6 with supports 6 a and 6 b. For this purpose, the supporting arm 6 has a width B6 required for the seat element 2. The lower support 6 b is fastened on an underframe 3 of the seat 1. The seat 1 or the seat element 2 is in a basic position I.
FIG. 14 illustrates a seventh variant embodiment of a seat 1 according to the invention in a simplified perspective view. A seat element 2 is essentially formed by a supporting arm 6 (only partially illustrated) with supports 6 a and 6 b and transverse slats 26. The transverse slats 26 are arranged on the upper support 6 a of the supporting arm 6 and are movable in relation to one another in order not to inhibit or obstruct the deformation of the upper support 6 a, which deformation arises as a basic position I illustrated is left. The lower support 6 b is fastened on an underframe 3 of the seat 1.
FIG. 15 illustrates a perspective view of a seat element 2 of an eighth variant embodiment of a seat 1. The seat element 2 has a supporting arm 6 which bears a covering 28 which forms a seat surface 29 and a backrest 30. The supporting arm 6 comprises a left, upper support 6 a, a right, upper support 6 a′ and a lower support 6 b located between them. The lower support 6 b is connected to the left, upper support 6 a by mechanical connecting links 12 and to the right, upper support 6 a′ by further mechanical connecting links 12. The upper supports 6 a and 6 a′ are connected to each other by two transverse supports 31 and 32. An upwardly directed, approximately vertically situated limb 33 of the lower support 6 b is divided into two struts 33 a, 33 b and merges with the latter into upwardly directed limbs 34, 35 of the upper supports 6 a, 6 a′. By this means, the upper supports 6 a and 6 a′ and the lower support 6 b form the single-part supporting arm 6. An approximately horizontally running limb 36 of the lower support 6 b is connected at a free end 37 via a guide element 9 to an approximately horizontally running limb 38 of the left, upper support 6 a and to an approximately horizontally running limb 39 of the right, upper support 6 a′. FIG. 16 shows a side view of the seat 1, the seat element 2 of which is already known from FIG. 15. The side view also illustrates an underframe 3 of the seat 1. The underframe 3 is connected to the limb 36 of the lower support 6 b. Only the left, upper support 6 a of the upper supports can be seen in the side view, the right, upper support is completely concealed. The supporting arm 6 which is of single-part design is connected between its upper support 6 a and its lower support 6 b via the guide element 9 and six connecting links 12. The guide element 9 and the connecting links 12 are designed as struts 40 which are mounted rotatably in the upper support 6 a and the lower support 6 b. A variant embodiment for the arrangement of the guide element 9, which arrangement replaces the guide element 9 (illustrated by solid lines), is illustrated by dashed lines. The guide element 9 shown by dashed lines connects the underframe 3 and the upper support 6 a. A seat part 4 of the seat 1 is situated with a rear seat part 4 b in a region. B, and a backrest part 5 is situated with a lower backrest part 5 a in a region C. In the regions B and C, the upper supports 6 a, 6 a′ are formed by central sections Q and Q′. The lower support 6 b is formed in these two regions B and C by a central section R. All six connecting links 12 visible in FIG. 16 are arranged between the central section Q of the upper support 6 a and the central section R of the lower support 6 b. A further six connecting links are arranged between the upper support 6 a′ and the lower support 6 b (see FIG. 17).
FIG. 17 illustrates, in a further perspective view, the seat element 2 shown in FIG. 15. It can be seen from this view that the seat element 2 or the supporting arm 6 is formed mirror-symmetrically with respect to a plane 41 situated vertically in space.
FIGS. 18 to 20 illustrate three further variant embodiments of seats 1 according to the invention. The three seats 1 are designed according to the seat shown in FIG. 1 b and each have two supporting arms 6 which bear a fabric 8 as the covering 28. In the side views, the second supporting arm is entirely concealed by the first supporting arm 6. For simplification, only the supporting arm 6 is described in each case. The other supporting arm is constructed comparably in each case and is comparably fastened to an underframe 3.
In the case of the ninth variant embodiment shown in FIG. 18, a lower support 6 b of the supporting arm 6 is fastened to the underframe 3 of the seat 1 by two bolts 42, 43. A connecting link 12 for connecting the supports 6 a and 6 b is formed by two slotted-guide mechanisms 44, 45. The slotted-guide mechanisms 44, 45 respectively comprise a pin 44 a and 45 a and a slot 44 b and 45 b. The slots 44 b and 45 b are formed on the underframe 3, and the pins 44 a and 45 a are connected to the supports 6 a and 6 b. A free end E1 of the upper support 6 a is guided on the lower support 6 b by means of a guide element 9.
In the case of the tenth variant embodiment shown in FIG. 19, a connecting link 12 between an upper support 6 a and a lower support 6 b of the supporting arm 6 is formed by an elastic element 46. The elastic element is arranged in an intermediate space 11 between the supports 6 a and 6 b. In order also to be able to transmit shearing forces, the elastic element 46 is adhesively bonded to an upper side 47 of the lower support 6 b and to a lower side 48 of the upper support 6 a. The elastic element 46 is designed, for example, as a rubber block 49. The supporting arm 6 is fastened by its lower support 6 b on the underframe 3. A free end E1 of the upper support 6 a is guided on the lower support 6 b via a guide element 9.
In the case of the eleventh variant embodiment shown in FIG. 20, a connecting link 12 between an upper support 6 a and a lower support 6 b of the supporting arm 6 is designed as a lever 13, as already known from preceding exemplary embodiments. In contrast to the preceding exemplary embodiments, a guide element 9 is formed by a slotted-guide mechanism 50. The latter comprises a pin 50 a and a slot 50 b. The pin 50 a is fastened to a free end E1 of the upper support 6 a and slides in the slot 50 b, which is formed on the lower part 3. During a movement of the seat element 1 from the basic position I illustrated in FIG. 20 into a resting position, the pin 50 a and the upper support 6 a connected thereto move upwards on a curve K50 in the direction of a backrest part 5. The lower support 6 b is screwed at a free end E2 to the underframe by means of two screws 51, 52.
The invention is not restricted to exemplary embodiments illustrated or described. On the contrary, it includes developments of the invention within the scope of the claims.
List of designations:
Seat element
Front seat part
Rear seat part
Backrest part
Lower backrest part
Upper backrest part
Upper support of 6
6a′
Second, upper support of 6
Lower support of 6
Upper support of 7
Lower support of 7
Intermediate space between 6a, 6b and 7a, 7b
Transverse support between 6b and 7b
Stop on 6a
Transverse strut between 6 and 7 and 6b and 7b
Footplate of 3
Strut between 22 and 14
Fastening point of 6b/7b on 14
Transverse slat
Transverse support between 6a and 6a′
Approximately vertically situated limb of 6b
Strut on 33
Upwardly directed limb of 6a
Upwardly directed limb of 6a′
Approximately horizontally situated limb of 6b
Free end of 36
Approximately horizontally situated limb of 6a
Approximately horizontally situated limb of 6a′
Slotted-guide mechanism
Slotted-guide mechanism as connecting link
Elastic element between 6a and 6b
Upper side of 6b
Lower side of 6a
Slotted-guide mechanism as guide element
Screw for fastening 6b to 3
Basic position of 1 and 2
Resting position of 1 and 2
Intermediate position between I and II
Region of 4a
Width of 6
Region of 4b
Region of 5a
Region of 5b
Pivotal point of 9 on 6a
Pivotal point of 9 on 6b
Pivotal point of 12 on 6a
Pivotal point of 12 on 6b
End of 6a
End of 6b
Displacement of D91 in y direction
Arcuate path of D91
Arcuate path of D121
Curve of 50a
Circular path of D91 about D92
Displacement of D91 in x direction
Pulling direction of 6a
Point on 6
Central section of 6a
Central section of 6a′
Central section of 6b
Angle between 4 and H
Angle between 5 and V
Opening angle between 4 and 5
Angle between 9 and H
Rocking point
Displacement distance of 19 in y′ direction
Inner opening angle
Difference between the angles W9
Difference between different angles of 12
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS946225Mar 15, 1909Jan 11, 1910Paul Irwin JSeat.US2771122Aug 28, 1953Nov 20, 1956Carl StraubRemovable cover lawn chairUS3041109Sep 29, 1958Jun 26, 1962Miller Herman IncWeb and spreader furniture constructionUS3120407Jun 5, 1961Feb 4, 1964Miller Herman IncNet seatingUS3230011Jul 5, 1963Jan 18, 1966Miller Herman IncSeatingUS3300251Jun 10, 1965Jan 24, 1967Knoll AssociatesUpholstery cover-frame connectionUS3565482 *Jun 24, 1968Feb 23, 1971Blodee LeifAdjustable contour chairUS3586370Dec 4, 1968Jun 22, 1971American Seating CoUpholstered chairUS3640576Jun 8, 1970Feb 8, 1972Art Metal Knoll CorpFurniture constructionUS3669496 *Dec 3, 1970Jun 13, 1972American Desk Mfg CoChair and seat and back unit thereforUS3844612Feb 8, 1973Oct 29, 1974K BorggrenArrangement in seating furniture or seats for attaching seat and back supporting elementsUS3877750Aug 6, 1973Apr 15, 1975Porsche AgReposing furnitureUS4036527Oct 15, 1975Jul 19, 1977Otaco LimitedTransportation seating construction and systemUS4062590May 24, 1976Dec 13, 1977Fixtures Manufacturing CorporationChair structureUS4230365Jan 18, 1979Oct 28, 1980Alexander MessingerArticle of furniture and method of manufactureUS4522444Sep 15, 1982Jun 11, 1985Charles PollockStacking chairUS4529247 *Apr 15, 1982Jul 16, 1985Herman Miller, Inc.One-piece shell chairUS4585272 *Oct 24, 1983Apr 29, 1986Castelli S.P.A.Chair having a back comprising a plurality of articulated segmentsUS4592126Dec 14, 1984Jun 3, 1986Homecrest Industries IncorporatedMethod for constructing furniture having a flexible sheet portionUS4889385Mar 9, 1988Dec 26, 1989American Seating CompanyChair seat-and-back supportUS4913493Sep 13, 1988Apr 3, 1990Strafor S.A.Flexible structureUS5015038 *Sep 10, 1990May 14, 1991The Shaw-Walker CompanyErgonomic seat and back structure for a chairUS5029942Nov 30, 1989Jul 9, 1991Bayer AktiengesellschaftBack rest support structure for a vehicle seatUS5102196 *Oct 24, 1988Apr 7, 1992Kokuyo Co., Ltd.Chair provided with a backrestUS5114210 *Jan 11, 1990May 19, 1992Maxton Fox Commercial Furniture Pty. Ltd.Tilting chair with improved lumbar supportUS5240308 *May 24, 1991Aug 31, 1993Goldstein Glenn AErgonomic adjustable chair and methodUS5320410 *Jan 14, 1992Jun 14, 1994Steelcase Inc.Chair controlUS5328245Oct 30, 1992Jul 12, 1994Thomas J. MarksChair having adjustable back supportUS5352022May 26, 1993Oct 4, 1994Steelcase Inc.Controlled deflection front lip for seatingUS5518294May 23, 1994May 21, 1996Ligon Brothers Manufacturing CompanyVariable apex back supportUS5649743Jan 31, 1995Jul 22, 1997Victor Stanley, Inc.Vandal-resistant bench and frame thereforUS5660439Nov 27, 1995Aug 26, 1997Unwalla; JamshedIntegrated seat and back and mechanisms for chairsUS5664835 *Mar 24, 1995Sep 9, 1997Peter RoederChairUS5842264 *Aug 27, 1997Dec 1, 1998Steelcase Inc.Chair construction and method of assemblyUS5918935 *Jun 3, 1997Jul 6, 1999Stulik; Edward L.Reclining chairUS5954399Jul 15, 1998Sep 21, 1999Hong; Jung-MyungLumbar support for a car seatUS5975634Oct 24, 1997Nov 2, 1999Steelcase Development Inc.Chair including novel back constructionUS6015187Jan 30, 1998Jan 18, 2000Haworth, Inc.Tilt control for chairUS6059368Jun 7, 1995May 9, 2000Herman Miller, Inc.Office chairUS6193318 *Jun 25, 1999Feb 27, 2001Daimlerchrysler AgSeat arrangementUS6234573 *Jun 29, 1999May 22, 2001Peter R�derChair, in particular office chairUS6257665 *Jul 8, 1999Jul 10, 2001Okamura CorporationChairUS6505890Feb 7, 2001Jan 14, 2003Am-Safe, Inc.Aircraft seat structureUS6513874Jun 19, 2000Feb 4, 2003Konig & Neurath AgChair, especially office chairUS6572190Jun 15, 2001Jun 3, 2003Hon Technology Inc.Lumbar support for a chairUS6582190May 14, 2001Jun 24, 2003Mitsubishi Heavy Industries, Ltd.Variable-capacity turbineUS6609754Feb 9, 2001Aug 26, 2003Arjuna Indraeswaran RajasinghamEasy ejector seat with skeletal crash safety beamUS6749261Aug 8, 2002Jun 15, 2004Steelcase Development CorporationSeating unit including novel back constructionUS6820933Jun 19, 2001Nov 23, 2004Fico Cables, LdaSpine support for vehicle seatsUS6896328Dec 18, 2002May 24, 2005Hon Technology Inc.Steel wire chair with springsUS6986549Mar 19, 2003Jan 17, 2006Leif KnieseSeating elementUS6991291Feb 1, 2005Jan 31, 2006Steelcase Development CorporationBack construction for seating unit having spring biasUS7097249Jul 17, 2003Aug 29, 2006Okamura CorporationTilting mechanism for a chair and chair having the sameUS7226127Dec 21, 2005Jun 5, 2007Tk Canada LimitedErgonomic chair backrestUS7243993Jul 10, 2006Jul 17, 2007Okamura CorporationTilting mechanism for a chair and a chair having the sameUS7252336Nov 5, 2002Aug 7, 2007Matthew Stephen FrisinaPivotable boat seatUS7320503 *Jul 6, 2005Jan 22, 2008Volker W. EysingBackrest for seats and chairs having pressure and tensile elementsUS7455365 *Mar 25, 2004Nov 25, 2008Herman Miller, Inc.Seating structure having flexible support surfaceUS7648201 *Feb 8, 2006Jan 19, 2010Volker Wilhelm EysingSupport elementUS20030189367Apr 7, 2003Oct 9, 2003Christian ErkerBucket seat with inclination-profile adjusting mechanismUS20040032156 *Aug 18, 2003Feb 19, 2004Grant StipekFurniture with molded frameUS20060181126 *Feb 8, 2006Aug 17, 2006Eysing Volker WSupport elementUS20060238009Jul 10, 2006Oct 26, 2006Okamura CorporationTilting mechanism for a chair and a chair having the sameUS20060244295Jul 7, 2006Nov 2, 2006Okamura CorporationChairUS20080264425Apr 30, 2007Oct 30, 2008Donald David MundellOvermolded Lumbar Support Apparatus and MethodUS20090042014Dec 7, 2007Feb 12, 2009InnatechCompressible molded componentUS20090102268Sep 18, 2008Apr 23, 2009Johann Burkhard SchmitzLoad support structureUS20100289308Mar 22, 2007Nov 18, 2010Johann Burkhard SchmitzSeating ArrangementUSD235298Apr 6, 1973Jun 10, 1975 End standard for a furniture seatUSD320034Feb 8, 1989Sep 17, 1991Ultimate Support Systems, Inc.Keyboard standUSD377431Sep 29, 1994Jan 21, 1997Herman Miller, Inc.Seat and back unit for a chairUSD386023Sep 13, 1996Nov 11, 1997Herman Miller, Inc.Seat and back unit for a chairUSD390026Oct 18, 1996Feb 3, 1998Kabushiki Kaisha SazabyChairUSD436259May 4, 2000Jan 16, 2001Okamura CorporationChairUSD436260May 4, 2000Jan 16, 2001Okamura CorporationChairUSD437132May 4, 2000Feb 6, 2001Okamura CorporationChairUSD441977Apr 13, 2000May 15, 2001Bernhardt, L.L.C.ChairUSD442383Sep 6, 2000May 22, 2001Ted Allen BellChairUSD444309May 4, 2000Jul 3, 2001Okamura CorporationChairUSD465347Oct 19, 2001Nov 12, 2002Ted Allen BellChairUSD469618Apr 24, 2001Feb 4, 2003Okamura CorporationChairUSD469970Nov 13, 2001Feb 11, 2003B.Z.B. — SpaChair without armsUSD476493Apr 24, 2001Jul 1, 2003Okamura CorporationChairUSD476820Apr 24, 2001Jul 8, 2003Okamura CorporationChairUSD481560Jul 2, 2002Nov 4, 2003Hsn Improvements, LlcStrut for a shoe storage rackUSD482542Sep 11, 2002Nov 25, 2003Suncoast Aluminum Furniture, Inc.ChairUSD487359Feb 6, 2003Mar 9, 2004Okamura CorporationChairUSD489542Feb 6, 2003May 11, 2004Okamura CorporationChairUSD509969Sep 5, 2003Sep 27, 2005Steelcase Development CorporationSeating unitUSD511629Jun 25, 2003Nov 22, 2005Caldwell John WChairUSD512578May 7, 2004Dec 13, 2005Okamura CorporationChairUSD512579May 7, 2004Dec 13, 2005Okamura CorporationChairUSD513910Apr 13, 2004Jan 31, 2006Gehry Frank OSeat frameUSD514345May 7, 2004Feb 7, 2006Okamura CorporationChairUSD514838May 7, 2004Feb 14, 2006Okamura CorporationChairUSD526495May 13, 2005Aug 15, 2006Lisa AlbinRocking chairUSD527920Mar 24, 2005Sep 12, 2006Okamura CorporationChairUSD528810Mar 24, 2005Sep 26, 2006Okamura CorporationChairUSD528811Mar 24, 2005Sep 26, 2006Okamura CorporationChairUSD528812Mar 24, 2005Sep 26, 2006Okamura CorporationChairUSD540557Dec 29, 2005Apr 17, 2007Agio International Co., Ltd.ChairUSD542549Apr 25, 2006May 15, 2007Okamura CorporationChairUSD542580Feb 28, 2006May 15, 2007Steelcase Development CorporationBackrestUSD543039Apr 25, 2006May 22, 2007Okamura CorporationChairUSD543040Apr 25, 2006May 22, 2007Okamura CorporationChairUSD543041Apr 25, 2006May 22, 2007Okamura CorporationChairUSD543042Apr 25, 2006May 22, 2007Okamura CorporationChairUSD543369Apr 25, 2006May 29, 2007Okamura CorporationChairUSD543371Dec 29, 2005May 29, 2007Agio International Company, LimitedChairUSD543385May 20, 2005May 29, 2007Steelcase Development CorporationSeat and back arrangementUSD543397May 20, 2005May 29, 2007Steelcase Development CorporationBack constructionUSD543736Jun 7, 2005Jun 5, 2007Steelcase Development CorporationChairUSD550471Apr 14, 2006Sep 11, 2007Okamura CorporationChairUSD550977Apr 14, 2006Sep 18, 2007Okamura CorporationChairUSD552368Feb 12, 2007Oct 9, 2007Steelcase Development CorporationChairUSD552882Apr 26, 2006Oct 16, 2007Okamura CorporationTableUSD554384Feb 12, 2007Nov 6, 2007Steelcase Development CorporationChairUSD555924Apr 13, 2006Nov 27, 2007Okamura CorporationChairUSD557921May 4, 2007Dec 25, 2007Steelcase Development CorporationChairUSD559000Jul 8, 2005Jan 8, 2008Telescope Casualfurniture, Inc.Outdoor chairUSD572915Feb 2, 2007Jul 15, 2008Tropitone Furniture Co., Inc.FurnitureUSD573816Jul 27, 2007Jul 29, 2008Carl MullerChair seatAU6563380A Title not availableDE4433663A1Sep 21, 1994Mar 28, 1996Gotthard BreschChair with subframe seat and backrestDE19916411A1Apr 1, 1999Nov 16, 2000Leif KnieseDynamischer Hebel zur Verbesserung der Kraft�bertragungEP049310B1 Title not availableEP00250109A1 Title not availableEP860355A1 Title not availableEP1040999A2Apr 1, 2000Oct 4, 2000Leif KnieseLoad carrying element with flexible outer skinEP1316651A2Apr 1, 2000Jun 4, 2003Leif KnieseLoad-carrying element with flexible outer skinFR2715124A1 Title not availableLU88528A1 Title not availableWO2007110737A2Mar 22, 2007Oct 4, 2007Herman Miller Inc.Ergonomic seatWO2009039231A2Sep 18, 2008Mar 26, 2009Herman Miller, Inc.Load support structure* Cited by examinerNon-Patent CitationsReference1Faraday, "Exploring Biomimetrics for Products & Packaging," Sep. 27, 2007, 3 pages.2Herman Miller for Business, "Eames Aluminum Group & Soft Pad Chairs," [online][retrieved from internet: URL http://www.hermanmiller.com/CDA/SSA/Product/1,1592,a10-c440-p39,00.html], [retrieved-date unknown], 2 pages.3Herman Miller for Business, "Eames Aluminum Group & Soft Pad Chairs," [online][retrieved from internet: URL http://www.hermanmiller.com/CDA/SSA/Product/1,1592,a10-c440-p39,00.html], [retrieved—date unknown], 2 pages.4International Search Report in International Application No. PCT/IB07/00721, dated Sep. 5, 2008, 3 pages.5International Search Report in International Application No. PCT/IB07/00745, dated Jul. 17, 2008, 2 pages.6International Search Report in International Application No. PCT/US08/76768, dated Mar. 10, 2009, 1 page.7Md, Magazine of Design, 5 pages, Oct. 2006.8Notice of Allowance from co-pending U.S. Appl. No. 12/284,159, dated Dec. 14, 2010, 7 pages.9Office Action from co-pending U.S. Appl. No. 12/284,159, dated Jun. 10, 2010, 10 pages.10Okamura Corporation, "Baron Ergonomic Mesh Chair," copyright 2005, [online][retrieved from internet: URL: http://www.okamura.co.jp/english/product/office/baron/index.html], [retrieved on Mar. 31, 2008], 1 page.11U.S. Appl. No. 12/225,334, filed Mar. 22, 2007, Schmitz et al. as filed, 68 pages.12U.S. Appl. No. 12/284,159, filed Sep. 18, 2008, Schmitz et al. as filed, 125 pages.13U.S. Appl. No. 29/291,968, filed Sep. 21, 2007, Schmitz et al. as filed, 50 pages.14United States Patent and Trademark Office, Trademark, Principal Register, Reg. No. 3,105,591, registered Jun. 20, 2006, 1 page.15Written Opinion in International Application No. PCT/IB07/00721, dated Sep. 5, 2008, 6 pages.16Written Opinion in International Application No. PCT/IB07/00745, dated Jul. 17, 2008, 4 pages.17Written Opinion of the International Searching Authority for International Application No. PCT/US2008/076768, dated Mar. 10, 2009, 7 pages.Referenced byCiting PatentFiling datePublication dateApplicantTitleUS8998339Mar 15, 2013Apr 7, 2015Steelcase Inc.Chair assembly with upholstery coveringUS9173492 *Jun 6, 2014Nov 3, 2015Jacques FortinSelf-reclining chairUS9211014Dec 5, 2012Dec 15, 2015Herman Miller, Inc.Composite body support member and methods for the manufacture and recycling thereofUS20150151840 *May 24, 2013Jun 4, 2015Lufthansa Technik AgAircraft seat comprising a seat assemblyUSD703457Jun 7, 2013Apr 29, 2014Herman Miller, Inc.ChairUSD723851Mar 27, 2014Mar 10, 2015Herman Miller, Inc.Backrest support* Cited by examinerClassifications U.S. Classification297/300.2, 297/452.13, 297/452.18, 297/451.7, 297/295, 297/285International ClassificationA47C1/024, A47C1/0355Cooperative ClassificationA47C1/03277, A47C31/126, A47C1/03255, A47C1/03288, A47C1/03294European ClassificationA47C31/12C, A47C1/032B, A47C1/032F, A47C1/032C6, A47C1/032C10Legal EventsDateCodeEventDescriptionSep 18, 2008ASAssignmentOwner name: HERMAN MILLER, INC.,MICHIGANFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SCHMITZ, JOHANN BURKHARD;PLIKAT, CLAUDIA;ZWICK, CAROLA EVA MARIANNE;AND OTHERS;REEL/FRAME:021578/0957Effective date: 20080911Owner name: HERMAN MILLER, INC., MICHIGANFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SCHMITZ, JOHANN BURKHARD;PLIKAT, CLAUDIA;ZWICK, CAROLA EVA MARIANNE;AND OTHERS;REEL/FRAME:021578/0957Effective date: 20080911Jan 13, 2015FPAYFee paymentYear of fee payment: 4RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services