Patent Abstract:
A buoyant pool chair supports a swimmer in an upright, semi-reclining or sitting position while the chair is floating in a swimming pool. Interconnected rigid frame members collectively form an open chair frame including a seat frame, left and right arm frames attached to the seat frame, and a back frame pivotally coupled to the seat frame. The back frame can be manually rotated to a folded, minimum profile position in which the chair back overlaps the chair seat, for example for shipping and storage, and rotatable to an upright, fixed position to accommodate lounging in a semi-reclining or sitting position. Stop apparatus on the chair frame is engagable with one of the seat frame and the back frame for fixing the back frame in the upright position, and releasable therefrom to permit closing rotational movement of the back frame to the folded position.

Full Description:
BACKGROUND OF THE INVENTION  
         [0001]    This invention relates generally to swimming pool accessories, and in particular to a buoyant lounge chair for supporting a person in a seated position while the chair is floating in water.  
           [0002]    Swimming pools offer personal recreation and relaxation in a variety of settings, for example in private homes, apartment complexes, motels, resorts and country clubs. Various flotation devices including buoyant chairs, rafts, water wings, floating cushions, body floats and air mattresses are used by swimmers as an aid for floating and relaxing on the surface of the water, while remaining seated upright, reclining or lounging, either partially or completely submerged. These items of pool furniture include flotation cushions made of a buoyant material such as open cell foam, closed cell foam, cork, kapok, fiberglass or balsa wood, which are sealed within a protective outer covering.  
           [0003]    A popular item of pool furniture is the buoyant lounge chair that permits a swimmer to relax on the surface of the water in a seated, semi-reclining orientation. In some lounge chair designs, the angle of recline is fixed and determined by the form of the rigid frame on which buoyancy cushions are attached, for example as shown in U.S. Pat. No. 6,086,150, which is incorporated herein by reference. In other lounge chair designs, the chair back is pivotably coupled to the frame on which buoyancy cushions are attached, for example as shown in U.S. Pat. No. 6,312,054, which is incorporated herein by reference. Those buoyant lounge chairs, manufactured and sold by Texas Recreation Corporation of Wichita Falls, Tex. have met with considerable commercial success. The present invention was stimulated by the need for a buoyant lounge chair having pivotal chair back that can be set in an upright, semi-reclining sitting position, in which the pool chair functions essentially as a buoyant chair, to a fully folded, minimum profile configuration for storage purposes, and to facilitate handling and shipment. For convenience and comfort, the back rest should be easily set in the standard angle of recline provided by conventional fixed-back lounge chairs.  
           [0004]    According to another conventional buoyant lounge chair arrangement, as shown in U.S. Pat. No. 4,662,852, the back rest frame is pivotally connected to the seat frame and is inclined against a rear cross bar, and the seat frame is braced by releasable engagement of a slotted bracket with a forward cross bar. The angle of recline is adjusted by extending and retracting the slotted bracket relative to the forward cross bar. This movement translates into angle of recline adjustment as the two sections pivot about a common hinge axis.  
           [0005]    An important consideration in the design and construction of buoyant lounge chairs, including those including a foldable back, is the maintenance of a water-tight seal about the cushion material and around the welded metal frame. The interlocking components of the foldable seat back coupling apparatus should also be protected.  
           [0006]    The external surface of the lounge chair is susceptible to attack by mildew, fungus, surface hardening, cracking and shrinking that are caused by long-term exposure to water, pool chemicals and solar radiation. Consequently, lounge chairs as well as other buoyant flotation devices are desirably protected by a durable, non-reactive coating of plastic material, such as vinyl. The protective coating must be soft, pliable and able to withstand rough handling and high shear forces along the joinder lines between the chair arms, the chair seat, and along the flex lines between the chair back and chair seat. The protective coating is applied by various processes, including dipping and spraying, preferably as set forth in our U.S. Pat. No. 6,086,150, incorporated herein by reference.  
           [0007]    Another limitation imposed by the construction of conventional lounge chairs is that the buoyant arm support sections are subject to tearing or deformation, and are also subject to collapse and separation from the chair frame at the interface between the arm support sections and the chair seat.  
           [0008]    Special care should be taken in the construction of buoyant lounge chairs to provide sufficient buoyancy material to maintain a stable upright orientation while the occupant is in a semi-reclining or sitting orientation. The buoyant lounge chair can overturn in response to shifting of its center of buoyancy as the occupant turns or moves about.  
         SUMMARY OF THE INVENTION  
         [0009]    The buoyant lounge chair of the present invention provides stable support for a swimmer in an upright, semi-reclining or sitting position while the chair is floating in a swimming pool. Interconnected rigid frame members collectively form an open chair frame. In the preferred embodiment, the frame members include a seat frame, left and right side arm frames attached to the seat frame, and a movable back frame. The back frame is pivotally coupled to the seat frame on opposite sides by dual axle shafts. A manually operable clutch is mounted on each axle shaft for releasably connecting the seat frame to the back frame. Each clutch is manually releasable to permit pivotal movement of the back frame relative to the seat frame, and is manually engagable to fix the angle of recline of the back frame relative to the seat frame, for example for use in the upright sitting position.  
           [0010]    Buoyant cushions are attached to the frame members, thereby forming a chair seat, a chair back, left and right chair arms and a bolster block. The buoyant cushions forming the chair seat, the chair arms, the chair back and the bolster block each include layers of buoyant cushion material secured and sealed together by an adhesive deposit in overlapping relation, with each chair frame member being enclosed and sealed between a pair of buoyant layers. Each axle shaft and clutch are also enclosed between a pair of the buoyant layers. Each clutch includes a manual actuator that extends laterally through a passage formed in a pair of buoyant arm cushions, and projects externally of each chair arm at a side location in which it can be conveniently manipulated for engaging and releasing the clutch while the operator is seated or reclining on the lounge chair.  
           [0011]    Each buoyant arm support section is reinforced by an upright arm support riser that is laterally offset from the seat frame and by a horizontal arm rest segment that is vertically offset from the seat frame. The left and right buoyant chair arms are stabilized and reinforced against collapse and separation from the chair frame by the upright arm support risers and the horizontal arm rest segments that are sandwiched between the buoyant arm support cushions.  
           [0012]    In the preferred embodiment, the left and right arm support cushions project aft of the pivotal union between the chair seat the chair back. According to this arrangement, the aft projecting portions of the arm support cushions overlap the laterally opposite end portions of the bolster block. The arm support cushions are reinforced against deflection and separation from the chair frame by an aft extension bar attached to the arm rest frame. The extension bar is laterally offset from the seat frame and from the back frame, and projects aft of the pivotal clutch union. The buoyant arm support cushions are further reinforced and stabilized against vertical deflection by the clutch actuator which extends laterally through the buoyant arm cushions.  
           [0013]    According to another aspect of the invention, the upright floating stability of the lounge chair is improved by extension portions of the buoyant arm cushions that project aft of the chair seat, substantially overlapping the opposite end portions of the bolster block. The upright floating stability of the lounge chair is also improved by a seat frame assembly including left and right seat frame segments each including an angled connecting portion attached to a central seat frame segment. The angled connecting portions slope downwardly relative to the seat frame segments, whereby the buoyant cushions in combination with the seat frame segments form a leg support section that slopes downwardly relative to the chair seat and buoyant arm cushions.  
           [0014]    The floating stability of the lounge chair is further improved by buoyant arm rest cushions which are mounted on top of the left arm and right arm support cushions. The arm rest cushions extend aft of the seat frame/back frame pivotal clutch union, substantially in flush alignment with the bolster block when the seat back is set in the upright lounging position. 
       
    
    
     BRIEF DESCRIPTION OF THE DRAWING  
       [0015]    The accompanying drawing is incorporated into and forms a part of the specification to illustrate the preferred embodiments of the present invention. Various advantages and features of the invention will be understood from the following detailed description taken in connection with the appended claims and with reference to the attached drawing figures in which:  
         [0016]    [0016]FIG. 1 is perspective view of a buoyant lounge chair constructed according to the preferred embodiment of the present invention;  
         [0017]    [0017]FIG. 2 is a perspective view thereof showing interconnected rigid frame members including a pivotally coupled back frame collectively forming an open chair frame;  
         [0018]    [0018]FIG. 3 is a perspective view showing first and second layers of buoyant cushion material secured together in overlapping relation, with the seat frame and back frame of the chair being sandwiched between the buoyant layers, the top layer forming a continuous body support surface that transitions through the pivotal union between the seat frame and the back frame;  
         [0019]    [0019]FIG. 4 is a perspective view of a portion of the seat frame, showing a threaded coupling nut welded onto a central seat frame segment;  
         [0020]    [0020]FIG. 5 is a perspective view similar to FIG. 3, showing the assembly of buoyant arm support cushions onto the left and right arm frames;  
         [0021]    [0021]FIG. 6 is a rear perspective view of the buoyant lounge chair showing a bolster frame sandwiched between a pair of buoyant cushions;  
         [0022]    [0022]FIG. 7 is a rear elevational view of the buoyant lounge chair shown in FIG. 1;  
         [0023]    [0023]FIG. 8 is a perspective view of the open chair frame of FIG. 2 with the pivotal back frame in the extended, fully reclining (body float) position;  
         [0024]    [0024]FIG. 9 is a perspective view of the open chair frame of FIG. 2, showing the back frame in the folded, minimum profile (storage/shipping) position;  
         [0025]    [0025]FIG. 10 is a perspective view of the fully assembled buoyant lounge chair of FIG. 1 with the back unfolded to the fully reclining (body float) position;  
         [0026]    [0026]FIG. 11 is a perspective view of the buoyant lounge chair of FIG. 1 with the back folded forward in the minimum profile (storage/shipping) position;  
         [0027]    [0027]FIG. 12 is a perspective view of the buoyant lounge chair shown in FIG. 1, partially broken away, showing details of the pivotal coupling and clutch assembly which connect the foldable back frame to the seat frame;  
         [0028]    [0028]FIG. 13 is a sectional view, partially broken away, taken along the line  13 - 13  of FIG. 1 showing abutting cushion layers that are adhesively sealed together around a portion of the back frame;  
         [0029]    [0029]FIG. 14 is a perspective view, partially broken away, of the pivotal coupling and clutch assembly shown in FIG. 12;  
         [0030]    [0030]FIG. 15 is a perspective view, partially broken away, of an alternative embodiment of the pivotal coupling and clutch assembly;  
         [0031]    [0031]FIG. 16 is an exploded, perspective view of the pivotal coupling and clutch assembly of the present invention;  
         [0032]    [0032]FIG. 17 is an exploded, perspective view similar to FIG. 16, illustrating an alternative embodiment of the pivotal coupling and clutch assembly;  
         [0033]    [0033]FIG. 18 is a perspective view, partially broken away, of the inside coupling clutch member shown in FIG. 17;  
         [0034]    [0034]FIG. 19 is a sectional view of the pivotal coupling and clutch assembly shown in FIG. 17, with the clutch assembly in the engaged operative position;  
         [0035]    [0035]FIG. 20 is a perspective view of the tubular steel coupling sleeve shown in FIG. 19;  
         [0036]    [0036]FIG. 21 is a left side elevational view thereof;  
         [0037]    [0037]FIG. 22 is a right side elevational view thereof; and,  
         [0038]    [0038]FIG. 23 is a perspective view of an alternative embodiment of the buoyant lounge chair of FIG. 1 which includes an extended leg support section.  
     
    
     DETAILED DESCRIPTION OF THE INVENTION  
       [0039]    Preferred embodiments of the invention will now be described with reference to various examples of how the invention can best be made and used. Like reference numerals are used throughout the description and several views of the drawing to indicate like or corresponding parts.  
         [0040]    Referring now to FIG. 1-FIG. 7, there is illustrated an exemplary embodiment of a light-weight buoyant lounge chair  10  for selectively supporting a person in seated, semi-reclining and fully reclining lounge positions while the chair is floating in water. The lounge chair  10  includes an adjustable chair back  12 , chair arms  14 ,  16 , a chair seat  18  and arm rest cushions  20 ,  22  which provide full body support in the seated, upright, semi-reclining, reclining and fully reclining lounge positions.  
         [0041]    The operative upright floating position refers to the flotation orientation of the lounge chair  10  with the chair back  12  and chair arms  14 ,  16  generally upright while the chair seat  18  is generally horizontal and at least partially submerged as indicated in FIG. 1. When the lounge chair is floating in water, the occupant is supported in a comfortable lounging orientation, with his arms being supported by the left arm rest cushion  20 , the right arm rest cushion  22  and his head is supported by a head support cushion  24 . The occupant&#39;s legs are supported by a leg support section  26  which projects forwardly from the chair seat  18 .  
         [0042]    Buoyancy sufficient to support an adult occupant having a body weight up to 250 lbs. is provided by multiple pairs of overlapping buoyant cushions that are attached to an open chair frame  28  shown in FIG. 2. The open chair frame  28  is a skeleton frame formed by interconnected rigid frame members, preferably {fraction (5/16)} inch diameter steel rod segments that are welded together. The rigid steel rod segments form a seat frame  30 , a back frame  32  that is pivotally coupled to the seat frame along a pivotal axis A and is adjustable through an incline angle α, which ranges from about 10° in the folded configuration (FIG. 11) to about 180° in the fully extended, body float configuration (FIG. 10). A left arm frame  34  and a right arm frame  36  are attached to the seat frame but are separated from the back frame to permit free movement of the back frame during adjustment of the recline angle α. A bolster frame  38  is welded onto the back frame  32 , projecting aft of the chair frame and extending laterally substantially from the left side to the right side of the chair frame  28 .  
         [0043]    Buoyant cushions formed by overlapping layers of buoyant cushion material are attached to the individual steel rod frame segments, thereby forming the buoyant chair back  12 , the left chair arm  14 , the right chair arm  16 , the chair seat  18  and a bolster block  40 . Each buoyant cushion is formed by a pair of overlapping layers of buoyant material, preferably slabs of closed cell polyurethane foam F having a density in the range of 1-6 lbs./cu.ft. Each closed cell foam layer is in the form of a rectangular slab, having a typical thickness in the range of 1-2 inches, and is cut to form a lounge chair having an assembled height of 27 inches, a length of 30 inches and a width of 30 inches.  
         [0044]    Referring again to FIG. 2, FIG. 3, FIG. 5, FIG. 6 and FIG. 13, overlapping pairs of buoyant cushions are attached and secured onto the chair frame members by an adhesive bonding agent, for example a deposit  42  of a fast setting contact cement, with the frame members being enclosed and sealed between the layers, thereby providing structural reinforcement for the soft, buoyant cushions. For this purpose, the chair seat  18  is formed by a pair of overlapping cushion layers  18 A,  18 B; the left chair arm is formed by a pair of overlapping arm support cushions  14 A,  14 B, with the left arm frame  34  being enclosed and sealed between the overlapping layers  14 A,  14 B.  
         [0045]    Likewise, the right arm  16  is formed by a pair of overlapping cushion layers  16 A,  16 B that are adhesively bonded together with the right arm frame  36  being enclosed and sealed between the overlapping layers. The chair back  12  is also formed by overlapping cushion layers  12 A,  12 B which are adhesively bonded together, with the back frame  32  being enclosed and sealed between the overlapping cushion layers. The bolster block  40  is also formed by overlapping buoyant cushion layers  40 A,  40 B that are adhesively bonded together with the bolster frame  38  being enclosed and sealed between the overlapping cushion layers.  
         [0046]    Referring again to FIG. 1 and FIG. 5, the left and right chair arms  14 ,  16  are stabilized further by adhesive attachment to the left and right side edge portions of the chair seat  18 . The chair arms overlap the laterally opposite sides of the chair back  12 , but are not attached to it. The left and right arm support cushions are further stabilized by adhesive attachment to the left arm rest cushion  20  and right arm rest cushion  22  which bridge across the overlapping cushion layers  14 A,  14 B and  16 A,  16 B, respectively. As shown in FIG. 5 and FIG. 7, aft projecting end portions  14 C,  14 D and  16 C,  16 D of the left arm support  14  and right arm support  16  overlap the opposite ends of the bolster block  40 , which further improves the buoyancy and floating stability of the lounge chair.  
         [0047]    The buoyant arm support sections  14 ,  16  are reinforced by the side arm frames  34 ,  36 . The side arm frame  34  includes an upright arm support riser segment  34 B that is laterally offset from the seat frame by an angled linking segment  34 C. The side arm frame also includes a horizontal arm rest segment  34 A that is vertically offset from the seat frame.  
         [0048]    The right side arm frame is identically reinforced by a horizontal arm rest segment  36 A, an upright arm support riser  36 B and an angled linking segment  36 C attached to the seat frame  30 B. The left and right arm support cushions are thus stabilized and supported against collapse and separation from the chair frame by the rigid support provided by the left and right arm segments that are enclosed and sealed between the buoyant arm support cushions, as indicated in FIG. 13.  
         [0049]    The aft projecting arm support cushions  14 C,  14 D and  16 C,  16 D are reinforced against deflection and separation from the chair frame by extension bars  34 E,  36 E, respectively. The extension bars  34 E,  36 E are welded onto the side arm frames  34 ,  36 , respectively. The extension bars are laterally offset from the seat frame  30 , and project aft of the pivotal union between the back frame  32  and the seat frame  30 . The upright floating stability of the lounge chair is improved by the aft extending portions of the buoyant arm cushions which project aft of the pivotal union, whereby the aft projecting portions substantially overlap the laterally opposite end portions of the bolster block  40 .  
         [0050]    The upright floating stability of the lounge chair  10  is further improved by the seat frame assembly  30  which includes left and right seat frame segments  30 A,  30 B and a central seat frame segment  30 C. The central seat frame segment  30 C is connected on opposite ends to the seat frame side segments by angled connecting segments  30 D,  30 E. The seat frame segments are enclosed and sealed between the buoyant chair seat cushions  18 A,  18 B. The floating stability of the lounge chair is improved by the leg support section  26  that slopes downwardly from the chair seat  18 , as shown in FIG. 1. The downward slope is provided by the angled seat frame segments  30 D,  30 E, as shown in FIG. 2.  
         [0051]    The floating stability of the lounge chair is also improved by attaching the bolster block  40  onto the back frame  32  so that its moment arm spacing relative to the pivotal axis A remains constant as the chair back is adjusted throughout its angle of incline range. Referring to FIG. 2, FIG. 5 and FIG. 6, the bolster frame  38  includes left and right bolster frame segments  38 A,  38 B that project downwardly from the back frame  32 , and are sandwiched between the lower and upper buoyant bolster cushions  40 A,  40 B. The bolster frame segments  38 A,  38 B maintain the bolster block  40  in a transverse orientation relative to the chair back  32  as the incline angle α is adjusted from one position to another. Preferably, the bolster frame segments  38 A,  38 B slope transversely so that the bolster block  40  is inclined by about 20° relative to the horizontal arm support segments  34 A,  36 A when the lounge chair back is in the upright floating position.  
         [0052]    Referring now to FIG. 1 and FIG. 13, the overlapping buoyant cushions are bonded and sealed together by a thin layer of adhesive  42 . Additionally, the surface portions of the buoyant cushions bordering the lines of abutting engagement between the chair seat and the left and right chair arms, and between the chair back and the bolster block are further bonded together and sealed by a layer of flexible caulking material  44 . Preferably, the caulking material is a high grade, 15-25 year acrylic material that provides good adhesion to the surface of the closed cell foam, and can withstand high shear forces arising along the interface surfaces. After the caulking material  44  has been applied and cured, a layer of solvent-based vinyl coating material  46  is applied to the exposed external surfaces of the lounge chair. Preferably, the protective vinyl coating  46  is applied over the external surfaces of the lounge chair  10  while it is suspended on a threaded weldment  48  from a hanger strap as described and claimed in our co-pending application Ser. No. 09/178,818 filed Oct. 26, 1998.  
         [0053]    Referring again to FIG. 1, FIG. 3 and FIG. 12, the buoyant cushions forming the chair seat  18  and the chair back  12  are preferably formed by first and second layers of buoyant cushion material  18 A,  18 B that are bonded together in overlapping relation by an adhesive deposit  42 . According to this arrangement, the layers of buoyant cushion material forming the chair seat  18  and the chair back  12  are integrally formed together, with the seat frame  30  and the back frame  32  being captured and sandwiched between the overlapping layers. The top buoyant layer  18 A forms a continuous body support surface that transitions smoothly through the incline angle α. The incline angle α can be varied through a range of from approximately 10° when the seat back is folded forward in the minimum profile position as shown in FIG. 11, to approximately 90° when the seat back  12  is in the upright position as shown in FIG. 1, and through approximately 180° when the seat back  12  is in the fully extended (body float) position as shown in FIG. 10.  
         [0054]    Referring again to FIG. 6, FIG. 7 and FIG. 11, a flexible tie-off grommet  50  is attached to the bolster frame  38 . The tie-off grommet  50  is enclosed and sealed between the lower and upper buoyant bolster layers  40 A,  40 B. An externally projecting portion of the tie-off grommet includes an eyelet for attachment to a tether line whereby the lounge chair  10  can be secured to a fixed structure such as a pool ladder so that the lounge chair will not be blown away during high winds. Also, the tie-off grommet can be used to hang the lounge chair from an overhead hook for inside sheltered storage, preferably with the lounge chair folded into its minimum profile configuration as shown in FIG. 11.  
         [0055]    According to an important feature of the present invention, the back frame  32  is pivotally coupled to the seat frame  30  by a pair of clutch assemblies  60 ,  80  as shown in FIG. 2, FIG. 8 and FIG. 16. The construction of the clutch assembly  80  is identical to the clutch assembly  80 . Referring in particular to FIG. 14 and FIG. 16, the clutch assembly  60  includes a fixed clutch member  62  attached to the seat frame  30 A and a rotatable clutch member  64  attached to the back frame  32 A. The fixed clutch member  62  and the rotatable clutch member  64  include complementary male and female end portions  62 A,  62 B and  64 A,  64 B that are adapted for mating engagement with each other when the clutch members are in the engaged position as shown in FIG. 14. Preferably, the male and female end portions consist of V-shaped ribs  62 A,  64 A and V-shaped pockets  62 B,  64 B that alternate with each other, wherein the V-shaped ribs on each clutch member are dimensioned and conformed for nesting engagement within the V-shaped pockets on the other clutch member.  
         [0056]    Each clutch member is intersected by a coupling aperture  62 C,  64 C, respectively, which are in concentric alignment with each other when the clutch members are engaged as shown in FIG. 14. The fixed clutch member  62  and the rotatable clutch member  64  are mounted on a threaded axle shaft  66  which extends through the coupling apertures  62 C,  64 C. The rotatable clutch member is mounted for rotation on and axial movement along the axle shaft  66  from an engaged position, as shown in FIG. 14, in which the fixed clutch member and the movable clutch member are in contact with each other, to a disengaged position, as shown in FIG. 17, in which the fixed clutch member  62  and the rotatable clutch member  64  are separated from each other.  
         [0057]    The angular position of the rotatable clutch member  64  relative to the fixed clutch member  62  is maintained by a manually operable actuator  68  and a compression tube  70 . Referring to FIG. 14, FIG. 17 and FIG. 18, the axle shaft  66  extends through the coupling apertures  62 C,  64 C of the fixed clutch member and rotatable clutch member, and also through the compression tube  70 . The threaded end  66 T of the axle shaft is engaged by a complementary threaded retainer  68 R coaxially embedded, preferably by molding, within the actuator knob  68 . As the actuator knob  68  is turned clockwise or counterclockwise, the actuator knob travels axially along the threaded end portion  66 T against or away from the compression tube  70 . The fixed clutch member  62  and the rotatable clutch member  64  are forced together in compressive engagement as the actuator knob  68  is rotated clockwise against the compression tube, and the clutch members  62 ,  64  are permitted to pull apart as the actuator knob  68  is rotated counterclockwise and travels away from the compression tube. Rotation of the axle shaft  66  is prevented by engagement of a hex head portion  66 H within a complementary hex pocket  64 H formed in the rotatable clutch member  64 , as shown in FIG. 18. Preferably, the axle shaft  66  includes a smooth, cylindrical bearing surface  66 S which is in registration with the coupling aperture  64 C. This permits the rotatable clutch member  64  to ride on a smooth bearing surface during rotation of the back frame.  
         [0058]    The length of the compression tube  70  and the length of the threaded portion  66 T of the axle shaft  66  are selected appropriately so that the compression tube  70  extends through the side arm cushions  14 A,  14 B, with the threaded end portion  66 T and the actuator knob  68  projecting externally of the side arm frame cushion  14 B, as shown in FIG. 1 and FIG. 5. The actuator knob  68  is conveniently located so that the operator can manually release and set each clutch to permit pivotal movement of the back frame  32  relative to the seat frame  30 , and to adjust and fix the angle of recline according to personal preference.  
         [0059]    Referring to FIG. 1, FIG. 5 and FIG. 12, it will be appreciated that each clutch assembly  60 ,  80  is covered by the overlapping buoyant cushions that form the chair seat and the chair back. Preferably, the clutch members are constructed of a high strength, moldable plastic material such as polyvinyl chloride (PVC) or nylon which does not corrode when exposed to water. The frame rod segments, which are made of steel, should be sealed and protected from exposure to water to prevent rust. For this purpose, the seat frame segments  30 A,  30 B and the back frame segments  32 A,  32 B are adhesively sealed between the overlapping buoyant cushions  12 A,  12 B as shown in FIG. 13.  
         [0060]    The water-tight seal is intensified and reinforced around the steel rod frame segments at the union with the clutch members by a first surface augmentation collar  72  and a second surface augmentation collar  74 . The augmentation collars  72 ,  74  are formed as integrally molded parts of the clutch members  62 ,  64 , and present enlarged side surfaces  72 S,  74 S, respectively, for adhesively bonding and forming a water-tight seal with the overlapping buoyant seat cushions  18 A,  18 B and overlapping buoyant back cushions  12 A,  12 B, as shown in FIG. 12 and FIG. 13.  
         [0061]    Referring now to FIG. 13, FIG. 15, FIG. 16, FIG. 17 and FIG. 19, the union between each clutch member and the frame segment is reinforced by a tubular steel coupling sleeve  76  which is molded into and embedded within the fixed clutch member  62 , and a tubular steel coupling sleeve  78  which is molded into and embedded within the body of the rotatable clutch member  64 . According to this arrangement, the tubular coupling sleeves  76 ,  78  are preassembled and molded within the clutch members, and the surface augmentation collars  72 ,  74  are integrally molded around the tubular body portions  76 C,  78 C which project externally of the clutch members, as shown in FIG. 19.  
         [0062]    During assembly, the steel rod seat frame segment  30 A is inserted into the bore  76 B of the tubular steel coupling sleeve  76 , and is then welded to the tubular steel coupling sleeve. Likewise, the steel rod seat frame segment  32 A is inserted into the bore  78 B tubular steel coupling sleeve  78  and then is also welded to the tubular coupling sleeve. This arrangement facilitates assembly of the buoyant lounge chair, and provides a more reliable water-tight seal around the chair frame segments that are subject to corrosion. The weldment bead W between the chair frame segments and the tubular coupling sleeves, together with the embedded end portions  76 A,  78 A assure a permanent bond between the chair frame and each clutch member, and prevents separation of the back frame from the seat frame.  
         [0063]    Referring now to FIG. 19, FIG. 20, FIG. 21 and FIG. 22, one end portion  76 A of the tubular steel coupling sleeve  76  is flattened or crimped with a swage tool, as shown in FIG. 20, which causes the end portion to be radially enlarged and flare radially outwardly from the tubular sleeve body portion  76 C. The radially enlarged end portion  76 A is totally embedded and molded within the clutch body  62 , thereby preventing twisting movement or axial movement of any kind of the tubular steel coupling sleeve with respect to the clutch body  62 , thus firmly locking it into place. After the steel rod seat frame segment  30 A is inserted into the cylindrical bore  76 B of the steel coupling sleeve  76 , as shown in FIG. 19, the two pieces are welded together by a weld bead W. The back frame segment  32 A is secured in a welded union W with a tubular steel coupling sleeve  78  which is identically formed with a radially enlarged, flared end portion  78 A. The result is a high strength union which can withstand rough handling without separation and is protected against corrosion.  
         [0064]    Referring now to FIG. 23, an alternative lounge chair embodiment  100  includes an extended buoyant cushion portion  26 E that projects forward of and in cantilevered relation to the central seat frame segment  30 C. The extended length of the leg support section provides complete support for the swimmer&#39;s entire body, including his legs and feet, when the seat back  12  is set in the fully extended, body float position as shown in FIG. 10. The lounge chair  100  shown in FIG. 12 is identical in construction with the lounge chair  10  shown in FIG. 1, except for the additional leg support length.  
         [0065]    Although the invention has been described with reference to certain exemplary arrangements, it is to be understood that the forms of the invention shown and described are to be treated as preferred embodiments. Various changes, substitutions and modifications can be realized without departing from the spirit and scope of the invention as defined by the appended claims.

Technology Classification (CPC): 0