Classifications

• • A—HUMAN NECESSITIES
  • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
  • A47C—CHAIRS; SOFAS; BEDS
  • A47C1/00—Chairs adapted for special purposes
  • A47C1/02—Reclining or easy chairs
  • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
  • A47C1/034—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts including a leg-rest or foot-rest
  • A47C1/035—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts including a leg-rest or foot-rest in combination with movably coupled seat and back-rest, i.e. the seat and back-rest being movably coupled in such a way that the extension mechanism of the foot-rest is actuated at least by the relative movements of seat and backrest
  • A47C1/0355—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts including a leg-rest or foot-rest in combination with movably coupled seat and back-rest, i.e. the seat and back-rest being movably coupled in such a way that the extension mechanism of the foot-rest is actuated at least by the relative movements of seat and backrest actuated by linkages, e.g. lazy-tongs mechanisms
• • A—HUMAN NECESSITIES
  • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
  • A47C—CHAIRS; SOFAS; BEDS
  • A47C1/00—Chairs adapted for special purposes
  • A47C1/02—Reclining or easy chairs
  • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
  • A47C1/034—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts including a leg-rest or foot-rest
  • A47C1/0342—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts including a leg-rest or foot-rest in combination with movable backrest-seat unit or back-rest
  • A47C1/0345—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts including a leg-rest or foot-rest in combination with movable backrest-seat unit or back-rest characterised by foot-rests actuated by lazy-tongs
• • A—HUMAN NECESSITIES
  • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
  • A47C—CHAIRS; SOFAS; BEDS
  • A47C7/00—Parts, details, or accessories of chairs or stools
  • A47C7/50—Supports for the feet or the legs coupled to fixed parts of the chair
  • A47C7/506—Supports for the feet or the legs coupled to fixed parts of the chair of adjustable type
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
  • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
  • A61G5/10—Parts, details or accessories
  • A61G5/14—Standing-up or sitting-down aids
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
  • A61G2203/00—General characteristics of devices
  • A61G2203/70—General characteristics of devices with special adaptations, e.g. for safety or comfort
  • A61G2203/74—General characteristics of devices with special adaptations, e.g. for safety or comfort for anti-shear when adjusting furniture
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
  • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
  • A61G5/10—Parts, details or accessories
  • A61G5/1056—Arrangements for adjusting the seat
  • A61G5/1067—Arrangements for adjusting the seat adjusting the backrest relative to the seat portion
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
  • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
  • A61G5/10—Parts, details or accessories
  • A61G5/1056—Arrangements for adjusting the seat
  • A61G5/1075—Arrangements for adjusting the seat tilting the whole seat backwards
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
  • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
  • A61G5/10—Parts, details or accessories
  • A61G5/12—Rests specially adapted therefor, e.g. for the head or the feet
  • A61G5/127—Rests specially adapted therefor, e.g. for the head or the feet for lower legs

Definitions

• the present disclosure relates to a furniture member and power recline and lift mechanism.
• Power lift chairs can provide a motor-operated transition from an occupant's seated position to a lift position which provides the occupant with approximately 50 percent or more of a transition from a seated position to a standing position. Such a feature may be particularly beneficial for occupants who have difficulty directly standing from a fully seated position.
• known power lift chair designs can impede placement of the occupant's feet in a position close to the center of gravity of the occupant and, therefore, require greater that necessary leg strength of the occupant to stand even when at a full lift position of the chair.
• known power lift chair designs have complicated operating mechanisms that are expensive to build and therefore result in a high cost of purchase.
• known power lift chair designs do not provide for multiple chair positions or range of motion that maximize occupant choice of seating and/or leg rest positions.
• the present disclosure provides a furniture member that may include a frame assembly, a motor, a slide member, a first bar, an axle, first and second leg members and a second bar.
• the frame assembly may include a chair portion movable relative to a base portion among a nominal position, a reclined position and a lift position.
• the motor may be attached to the base portion.
• the slide member may be connected to the motor and displaceable relative to the base portion in first and second directions by selective operation of the motor.
• the first bar may be connected to the slide member and the chair portion.
• the first bar may move the chair portion among the nominal position, the reclined position and the lift position in response to operation of the motor.
• the axle may be rotatably mounted to the base portion.
• the first and second leg members may be attached to respective first and second ends of the axle.
• Each of the first and second leg members may include a fore foot and an aft foot.
• the second bar may be connected to the chair portion and slidably connected to the axle.
• the second bar may rotate the axle in a first direction in response to movement of the chair portion into the reclined position.
• the second bar may rotate the axle in a second direction in response to movement of the chair portion into the lift position.
• the fore feet of the first and second leg members extend through the base portion in the reclined position so that an aft portion of the base and fore feet of the first and second leg members are supporting a weight of the furniture member with a fore portion of the base portion spaced apart from a ground surface upon which the furniture member is situated.
• the aft feet of the first and second leg members extend through the base portion in the lift position so that the fore portion of the base and aft feet of the first and second leg members are supporting the weight of the furniture member with the aft portion of the base portion spaced apart from the ground surface.
• the first and second leg members are generally U-shaped members.
• the base portion includes a plurality of apertures through which the fore and aft feet of the first and second leg members are extendable.
• the furniture member includes a legrest mechanism including a legrest linkage and a legrest member that are moveable between an extended position and a retracted position independently of movement of the first and second bars.
• the legrest mechanism includes a legrest motor that drivingly engages the legrest linkage.
• the axle is rotatably supported by bearing blocks that are fixedly mounted to the base portion.
• first and second leg members are fixedly attached to the axle by first and second brackets, respectively.
• the second bar includes an elongated slot that slidably receives a peg that is fixedly attached to the axle.
• the slide connected to the first bar has a range of motion that is longer than the elongated slot so that the peg slides along the elongated slot of the second bar for only a portion of the range of motion of the slide.
• continued motion of the slide in a rearward direction past a position of the slide corresponding to initial contact between the peg and a fore end of the elongated slot causes rotation of the axle and the first and second leg members in a first rotational direction relative to the base portion.
• continued motion of the slide in a forward direction past a position of the slide corresponding to initial contact between the peg and an aft end of the elongated slot causes rotation of the axle and the first and second leg members in a second rotational direction relative to the base portion.
• the furniture member can be a chair.
• the furniture member can be a sofa or a section of a sofa.
• an angle between a seatback of the chair portion and a seat bottom of the chair portion increases by a predetermined amount when the chair portion is moved from the nominal position to the lift position.
• the predetermined amount may be approximately five degrees, for example.
• the present disclosure provides a furniture member that may include a base member, a chair frame, a mechanism, and first and second leg members.
• the base member may include fore and aft end portions.
• the chair frame may be movable relative to the base member among a nominal position, a reclined position and a lift position.
• the mechanism may move the chair frame relative to the base member among the nominal, reclined and lift positions.
• the first and second leg members may each have fore and aft feet movably mounted to the base member such that the fore feet extend through the base member in the reclined position and the aft feet extend through the base member in the lift position.
• the fore and aft end portions of the base may support a weight of the furniture member in the nominal position.
• the fore feet and the aft end portion may support the weight in the reclined position.
• the aft feet and the fore end portion may support the weight in the lift position.
• the mechanism includes a motor attached to the base member, a slide member connected to the motor, and a first bar connected to the slide member and the chair frame.
• the furniture member includes an axle rotatably mounted to the base member; and a second bar connected to the chair frame and slidably connected to the axle.
• the second bar may rotate the axle in a first direction in response to movement of the chair frame into the reclined position and rotate the axle in a second direction in response to movement of the chair frame into the lift position.
• the second bar includes an elongated slot that slidably receives a peg that is fixedly attached to the axle.
• the slide connected to the first bar has a range of motion that is longer than the elongated slot so that the peg slides along the elongated slot of the second bar for only a portion of the range of motion of the slide member.
• continued motion of the slide member in a rearward direction past a position of the slide member corresponding to initial contact between the peg and a fore end of the elongated slot causes rotation of the axle and the first and second leg members in a first rotational direction relative to the base member.
• continued motion of the slide member in a forward direction past a position of the slide member corresponding to initial contact between the peg and an aft end of the elongated slot causes rotation of the axle and the first and second leg members in a second rotational direction relative to the base member.
• the axle is rotatably supported by bearing blocks that are fixedly mounted to the base member.
• first and second leg members are fixedly attached to the axle by first and second brackets, respectively.
• the base member includes a plurality of apertures through which the fore and aft feet of the first and second leg members are extendable.
• the furniture member includes a legrest mechanism including a legrest linkage and a legrest member that are moveable between an extended position and a retracted position independently of movement of the first and second leg members.
• the legrest mechanism includes a legrest motor that drivingly engages the legrest linkage.
• the first and second leg members are generally U-shaped members.
• the furniture member can be a chair.
• the furniture member can be a sofa or a section of a sofa.
• an angle between a seatback of the chair frame and a seat bottom of the chair frame increases by a predetermined amount when the chair frame is moved from the nominal position to the lift position.
• the predetermined amount may be approximately five degrees, for example.
• Figure 1 is a front right perspective view of a furniture member having a power lift mechanism shown in a nominal seating position
• Figure 2 is the furniture member of Figure 1 shown in a maximum lift position
• Figure 3 is a front left perspective view of a base portion of the furniture member of Figure 1 showing the power lift mechanism in an exploded view;
• Figure 4 is the front left perspective view of Figure 3 showing the assembled power lift mechanism
• Figure 5 is a front right perspective exploded assembly view of a chair portion of the furniture member of Figure 1 ;
• Figure 6 is a right rear perspective view of the base and chair portions of Figures 4 and 5 during assembly;
• Figure 7 is a front right perspective view of the furniture member of Figure 1 in a forward lift position
• Figure 8 is a front right perspective view of the furniture member of Figure 1 in a rearward tilt and seatback rotated position
• Figure 9 is a front right perspective view of the furniture member of Figure 1 in a leg rest extended position
• Figure 10 is a front right perspective view of the furniture member of Figure 1 in a seatback rotated and leg rest extended position;
• Figure 1 1 is a front right perspective view of the furniture member of Figure 9 in the leg rest extended and further in a forward lift position;
• Figure 12 is a top plan view of the furniture member of Figure 1 ;
• Figure 13 is a cross sectional right side elevational view taken at section 13 of Figure 12;
• Figure 14 is a cross sectional rear elevational view taken at section 14 of Figure 12;
• Figure 15 is a left side elevational view of the furniture member of Figure 2;
• Figure 16 is a cross sectional side elevational view of the furniture member of Figure 2 taken at section 16 of Figure 12;
• Figure 17 is a partial front left perspective view of the furniture member of Figure 2;
• Figure 18 is a cross sectional right side elevational view of the furniture member of Figure 13 further showing the chair in a rearward tilt position;
• Figure 19 is a cross sectional right side elevational view of the furniture member of Figure 13 further showing the chair in a leg rest fully extended position;
• Figure 20 is a cross sectional right side elevational view of the furniture member of Figure 18 further showing the chair in a seatback fully reclined position;
• Figure 21 is a cross sectional right side elevational view of the furniture member of Figure 20 further showing the chair in a leg rest fully extended position;
• Figure 22 is a right side elevational view of another furniture member (with a right armrest removed) in a nominal position;
• Figure 23 is a perspective view of a mechanism of the furniture member of Figure 22 in the nominal position
• Figure 24 is a right side elevational view of the furniture member in a nominal position with a legrest mechanism in an extended position
• Figure 25 is a right side elevational view of the furniture member in a fully reclined position
• Figure 26 is a perspective view of the mechanism in the fully reclined position;
• Figure 27 is a right side elevational view of the furniture member in a full lift position;
• Figure 28 is a perspective view of the mechanism in the full lift position.
• Figure 29 is a perspective view of an alternative configuration of a leg member of the furniture member of Figures 22-28.
• a lift chair 10 includes a rotatable frame assembly 12 having a seat back assembly 14 rotatably connected to frame assembly 12, and a leg rest member 16 connected to and extendable/retractable with respect to frame assembly 12.
• the frame assembly 12 includes a base portion 18 which is positioned interior to and rotatable with respect to a chair portion 20.
• lift chair 10 is not shown with seat support springs, padding, or upholstery which are commonly applied to lift chairs as known in the art.
• the lift chair 10 is supported on a floor or planar surface using a square or rectangular shaped base platform 22 which according to several embodiments is included with base portion 18.
• the chair portion 20 further includes each of a first arm rest portion 24, corresponding to a right side of an occupant seated in lift chair 10, and a second arm rest portion 26, corresponding to a left side of the seated occupant.
• Lift chair 10 also includes several components which are movably displaced using a mechanism 28.
• Mechanism 28 independently or in combination controls: forward and rearward rotational displacement of seat back assembly 14; extension/retraction of the leg rest member 16 between a stowed position shown to an outward extended position, which is shown and described in reference to Figures 9 and 10; and rotation of the chair portion 20 upwardly and downwardly with respect to the base portion 18 to provide multiple occupant seating positions and a full lift position.
• lift chair 10 is shown following an upward/forward rotation from the nominal seating position of Figure 1 to a maximum lift position which accommodates user exit or entrance from/to the lift chair 10.
• a lift mechanism portion 30 of mechanism 28 is actuated by the occupant, causing lift and rotation of chair portion 20 with respect to a frame rotational axis 32 which rotates chair portion 20 in a lift rotational direction "A".
• the seat back assembly 14 is positioned in the fully upright position and leg rest member 16 is positioned in its stowed position.
• the mechanism 28 further includes a leg rest mechanism portion 34 which will be described in greater detail in reference to Figure 5, which is not operational during the rotation of chair portion 20 to the full lift position.
• the chair portion 20 further includes a first inner arm rest member 36 positioned to the occupant's right hand side and a second inner arm rest member 38 positioned to the occupant's left hand side, which are nested between a first base frame member 40 and a second base frame member 42.
• components of the lift mechanism portion 30 of mechanism 28 are positioned in a cavity defined between the first and second base frame members 40, 42.
• the first base frame member 40 is positioned proximate to a base platform first edge 44 of base platform 22, and second base frame member 42 is positioned proximate to a base platform second edge 46 of base platform 22.
• Each of the first and second base frame members 40, 42 are oriented parallel with respect to each other and substantially perpendicular to base platform 22.
• a third base frame member 48, defining a rear facing wall of base portion 18, is positioned proximate to a base platform third edge 50 of base platform 22.
• a plurality of feet 51 are adjustably connected to base platform 22 at each of a plurality of feet positioning apertures 52. Feet 51 allow for ensuring contact and equal support of the four corners of base platform 22.
• first and second base frame members 40, 42 are provided with an intersecting corner 53 where a frame member forward edge 54 of each of the first and second base frame members 40, 42 intersects with base platform 22.
• the intersecting corner 53 of each of the first and second base frame members 40, 42 is spatially and rearwardly positioned with respect to a base platform forward edge 55 of base platform 22.
• first base frame member 40 includes a first receiving face 56 which is oriented parallel with respect to an upper face 58 of base platform 22. The first receiving face 56 is positioned proximate to the frame member forward edge 54 of first base frame member 40.
• a second receiving face 60 is similarly provided with second base frame member 42, which is oriented parallel with respect to upper face 58 and co-planar with respect to first receiving face 56.
• a first receiving slot 62 having a generally U-shape, is created downwardly with respect to the first receiving face 56.
• the first receiving slot 62 receives a first U- shaped journal 64 which is sized to be slidably received in first receiving slot 62 in a downward direction.
• the first U-shaped journal 64 is integrally included with a first connection member 66 which can be combined as a unitary molded plastic component.
• connection member fasteners 68 are inserted from the outer side or face of first base frame member 40 and are received in threaded apertures of first connection member 66 to fix the location of first connection member 66.
• first connection member 72 defining either a duplicate of or a mirror image of first connection member 66, is similarly positioned in a U-shaped second receiving slot created in second receiving face 60 of second base frame member 42.
• Second connection member 72 is shown in its installed position. In the installed position of both first and second connection members 66, 72, an upper edge 74 of both members is positioned substantially flush with or slightly above the first or second receiving face 56, 60.
• the upper edge 74 of both first U-shaped journal 64 and second U-shaped journal 70 may extend partially into the U-shaped slot defined by the U-shaped journal 64, 70. The purpose for this extension will be better described in reference to Figure 6.
• each of the first and second base frame members 40, 42 defines an acute angle a with respect to a plane defined by upper face 58 of base platform 22.
• angle a will be better described in reference to Figure 16. It is noted that intersecting corner 53 is recessed rearwardly with respect to base platform forward edge 55 to create angle a.
• lift mechanism portion 30 includes a lift motor 76 which according to several aspects is a direct current (DC) motor.
• a mounting bracket 78 is connected to a forward directed face 80 of third base frame member 48 and also to upper face 58 of base platform 22.
• Mounting bracket 78 includes coaxial through apertures 82, only one of which is clearly visible in Figure 3, which slidably receive an assembly mount pin 84 to connect an assembly, including lift motor 76 and a gear housing 86 directly connected to lift motor 76, which includes internal gears (not shown) which drive and are directly connected to an internal worm gear (not shown) of a worm drive assembly 88.
• worm drive device or gear is not limiting and can be replaced by other drive devices or gears as are known in the art.
• first and second guide members 96, 98 are molded plastic components; however, alternate materials can also be used.
• First guide member 96 includes a first elongated slot 100
• second guide member 98 includes a second elongated slot 102, both located proximate to an upper wall or edge 103, 103' of first and second guide members 96, 98.
• Elongated slots 100, 102 are oriented substantially in parallel axial alignment with each other in the installed positions of the first and second guide members 96, 98.
• Each of the first and second guide members 96, 98 also includes a low elevation end 104 oriented toward the forward or front facing portion of base portion 18 and a high elevation end 106 oriented toward third base frame member 48 or a rear facing end of base portion 18.
• the elongated slots 100, 102 therefore have a continuous rearward to frontward downward pitch or angle with respect to upper face 58.
• Each of the first and second guide members 96, 98 also includes a planar support face 108 which rests on and is fastened to the upper face 58 of base platform 22.
• Lift mechanism portion 30 further includes a rectangular and hollow metal lift bar or tube 1 10.
• the lift bar 1 10 may be a generally L-shaped bar including a substantially straight first tube portion 1 12 and a second tube portion 1 14 which is angularly oriented with respect to first tube portion 1 12.
• the lift bar 1 10 is connected to, and therefore displaces during the sliding motion of worm gear slide 90.
• a combined weight of a substantial portion of chair portion 20 plus a substantial portion of a weight of the occupant are distributed by lift bar 1 10 to worm gear slide 90 and thereby to each of the first and second guide members 96, 98 such that bending does not occur within the length of worm drive assembly 88.
• a first shoulder bolt 1 16 includes a bolt head 1 18, a bolt sleeve 120, and a bolt threaded shank 122 positioned opposite to bolt head 1 18.
• the bolt threaded shank 122 and bolt sleeve 120 of first shoulder bolt 1 16 are disposed through elongated slot 100 of first guide member 96.
• a tube connecting end 124 of lift bar 1 10 is positioned between a first inside face 126 of first guide member 96 and a first slide face 128 of worm gear slide 90.
• first shoulder bolt 1 16 After the bolt threaded shank 122 and bolt sleeve 120 of first shoulder bolt 1 16 extend through elongated slot 100, they are slidably disposed through a tube through aperture 130 created in the tube connecting end 124.
• Bolt threaded shank 122 extends out of tube through aperture 130 and is threadably engaged in a first threaded bore 132 created in the first slide face 128 of worm gear slide 90.
• Different portions of bolt sleeve 120 are slidably received in elongated slot 100 and rotatably received in the tube through aperture 130, therefore allowing sliding motion of worm gear slide 90 as well as rotation of lift bar 1 10 with respect to a central axis of first shoulder bolt 1 16.
• the sliding contact of first shoulder bolt 1 16 with walls of first elongated slot 100 therefore distributes half the weight received at worm gear slide 90 to first guide member 96 and base platform 22 at any sliding position of worm gear slide 90.
• the lift bar 1 10 is also connected to second guide member 98 in the following manner.
• An offset flange 134 is fastenably engaged to the tube connecting end 124 using bracket fasteners 136.
• the offset flange 134 is integrally connected to a connection bracket 138.
• Connection bracket 138 is substantially planar such that connection bracket 1 38 can rest on a plurality of ribs defining a slide surface 140 of worm gear slide 90.
• a transverse flange 142 is oriented transverse to and integrally connected to connection bracket 138, and contacts a second slide face 144 of worm gear slide 90 which is oriented parallel to, but oppositely facing with respect to first slide face 128.
• a transverse flange aperture 146 of transverse flange 142 is positioned proximate to a bushing 148 that is disposed between transverse flange 142 and a second inside face 150 of second guide member 98.
• Bushing 148 has a length which corresponds approximately with a width of lift bar 1 10, thereby spacing first and second guide members 96, 98 substantially equally about and with respect to worm drive assembly 88.
• a bushing bore 152 of bushing 148 is coaxially aligned with transverse flange aperture 146 and a second shoulder bolt 154 is assembled similar to first shoulder bolt 1 16 by extending second shoulder bolt 154 through the elongated slot 102, the bushing bore 152, the transverse flange aperture 146, and a threaded aperture (not visible in this view) created in the second slide face 144 of worm gear slide 90.
• the second shoulder bolt 154 therefore similarly provides sliding support for half the weight distributed through worm gear slide 90 to second guide member 98 and thereby to base platform 22.
• base portion 18 is shown following the completed assembly of lift mechanism portion 30.
• the worm gear slide 90 is positioned in a neutral or nominal position which provides a basic seating position for the occupant of lift chair 10.
• lift motor 76, gear housing 86 and worm drive assembly 88 By subsequent operation of lift motor 76, gear housing 86 and worm drive assembly 88, worm gear slide 90 can be slidably disposed in the slide lifting direction "B" to rearwardly and upwardly displace lift bar 1 10, establishing the lift chair full lift position shown with respect to Figure 2.
• the occupant's weight, transferred via lift bar 1 10 to worm gear slide 90, is distributed to each of the first and second guide members 96, 98 by the first and second shoulder bolts 1 16, 154.
• first and second shoulder bolts 1 16, 154 are positioned approximately two thirds along a length of elongated slots 100, 102 looking forward with respect to lift motor 76. Also, in the nominal position of worm gear slide 90, the connection bracket 138 lays substantially flat with respect to worm gear slide 90. In the completed assembly position of base portion 18, the first and second U-shaped journals 64, 70 are fixed in place, and base portion 18 is therefore ready to receive chair portion 20 as will be described in reference to Figure 6.
• the chair portion 20 is assembled as follows. First and second chair frame members 156, 158 are positioned substantially parallel with respect to each other. A chair frame structural tube 160 is fixed to rearward ends of each of the first and second chair frame members 156, 158 to provide a predetermined frame spacing. A chair frame front connecting member 162 connects forward ends of the first and second chair frame members 156, 158. The leg rest mechanism portion 34 is positioned between and supported by the chair frame structural tube 160 and the chair frame front connecting member 162.
• the leg rest mechanism portion 34 includes a leg rest drive motor 164 which according to several aspects is a DC motor.
• the leg rest drive motor 164 is connected to a drive connecting member 166 which is used to rotate a drive rod 168 using a drive rod connecting member 170.
• a support shaft 172 is positioned in parallel with drive rod 168 and includes portions which extend outwardly via apertures 173, 173' created in each of the first and second chair frame members 156, 158. The extending portions will be described in better detail in reference to Figure 6.
• First and second pantograph linkage sets 174, 176 are each connected to the drive rod 168 and the support shaft 172. Operation of the leg rest drive motor 164 causes extension of the drive rod connecting member 170 which axially rotates drive rod 168.
• Rotation of drive rod 168 acts to extend or retract each of the first and second pantograph linkage sets 174, 176.
• the first pantograph linkage set 174 extends through a first clearance opening 178 created in chair frame front connecting member 162.
• the second pantograph linkage set 176 extends through a second clearance opening 180 of chair frame front connecting member 162.
• Each of the first and second pantograph linkage sets 174, 176 are connected to the leg rest member 16. Extension or retraction of the first and second pantograph linkage sets 174, 176 therefore extends or retracts the leg rest member 16.
• chair portion 20 further includes a seat frame 182 which is supported in part on first and second swing assemblies 184, 186 which are rotatably connected to a tube assembly 188.
• a first rear swing assembly 190 is also connected to tube assembly 188 and a first back bracket assembly 192 is connected to first rear swing assembly 190.
• a second rear swing assembly 194 is also connected to tube assembly 188 and a second back bracket assembly 196 is connected to the second rear swing assembly 194.
• the first and second back bracket assemblies 192, 196 are used to releasably connect the seat back assembly 14. Rotation of the tube assembly 188 with respect to first and second rear swing assemblies 190, 194 displaces the first and second swing assemblies 184, 186, which displace the seat frame 182 either forwardly or rearwardly.
• frame assembly 12 is assembled by inserting the assembled chair portion 20 into the assembled base portion 18 by loading the chair portion 20 in a downward installation direction "D" until a first shaft extension portion 198 and a second shaft extension portion 199 (shown in phantom in Figure 6), which are integral, extending portions of support shaft 172, are received in the individual first and second U-shaped journals 64, 70 (only first U-shaped journal 64 is clearly visible in this view).
• a material of the U-shaped journals 64, 70 is selected to provide a low coefficient of friction and, as such, can be a polyamide or a polytetraflouroethylene material or similar polymeric material to provide minimal resistance to rotation of chair portion 20 with respect to base portion 18.
• the first shaft extension portions 198, 199 are individually and sequentially (in any order) snapped in the individual first and second U-shaped journals 64, 70.
• the second tube portion 1 14 of lift bar 1 10 is then positioned in a clevis 200 fixed to the tube assembly 188.
• a clevis through aperture of an insulating bushing 202 receives a tube mounting pin 204 which is also extended through a second tube aperture 206 created in second tube portion 1 14 such that second tube portion 1 14 is rotatably connected to the clevis 200.
• Tube mounting pin 204 can be retained after insertion using a standard hairpin clip (not shown).
• the third base frame member 48 of base portion 18 substantially provides a rear wall when the chair portion 20 is received in base portion 18.
• a motor control fob 208 is then connected to the mechanism 28 for selective operation by the occupant in directing operation of either or both the lift mechanism portion 30 and/or leg rest mechanism portion 34. At this time, the leg rest member 16 is free to extend in a forward direction by operation of the leg rest mechanism portion 34.
• lift chair 10 can be moved from the nominal position shown in Figure 1 to a forward lift position shown in Figure 7 by operation of the lift mechanism portion 30 which causes a forward rotation of chair portion 20 with respect to frame rotational axis 32.
• Each of the first and second arm rest portions 24, 26 includes an arm rest outer frame 210 having a first frame lower face 212 at a rearward end of arm rest outer frame 210 and a second frame lower face 214 positioned toward a forward end of arm rest outer frame 210.
• the first frame lower face 212 is oriented at an angle with respect to second frame lower face 214.
• the second frame lower face 214 is brought into parallel alignment with base platform 22, and the first frame lower face 212 is raised with respect to the base platform third edge 50.
• the seat back assembly 14 is in its upright position, and the leg rest member 16 is in its stowed position.
• lift chair 10 can also be positioned in a rearward tilt position by operation of lift mechanism portion 30.
• chair portion 20 is rotated in a chair downward rotational direction ⁇ " with respect to frame rotational axis 32, the first frame lower face 212 is brought into parallel alignment with base platform 22, and the second frame lower face 214 is raised with respect to base platform 22.
• seat back assembly 14 is rotated in a seat back reclining direction "F", which directly results in a forward displacement of the seat frame 182 in a seat frame extending direction "G”.
• the forward displacement of seat frame 182 is caused by rotation/displacement of the tube assembly 188 during operation of lift mechanism portion 30.
• the leg rest member 16 is still in its stowed position. Operation of the leg rest mechanism portion 34 is therefore not required to reach the lift chair rearward tilt and seat back assembly rearward reclined positions shown.
• leg rest member 16 can be extended by operation of leg rest mechanism portion 34. Operation of leg rest drive motor 164 causes extension of the first and second pantograph linkage sets 174, 176 (only first pantograph linkage set 174 is shown for clarity). The leg rest member 16 can be extended without repositioning seat frame 182.
• leg rest member 16 can be extended by operation of leg rest mechanism portion 34 either before or after rotation of chair portion 20 in the lift rotational direction "A" to the forward lift position.
• the second frame lower face 214 of arm rest outer frames 210 are oriented substantially parallel or in direct contact with base platform 22, and the first frame lower face 212 is elevated with respect to base platform 22. From this position, either the chair portion 20 can be returned to the nominal position shown in Figure 1 before the return of leg rest member 16 to the stowed position, or leg rest member 16 can be returned to the stowed position before chair portion 20 is returned to the nominal position.
• a chair frame rear wall/connecting member 216 of chair portion 20 extends below and rearwardly of third base frame member 48.
• a frame member lower end 218 of chair frame rear connecting member 216 is positioned substantially below an upper end 220 of the third base frame member 48.
• the first shoulder bolt 1 16 (and second shoulder bolt 154, not visible in this view) is positioned substantially two thirds of the length of elongated slot 100 with respect to a rear-to-front orientation of elongated slot 100.
• the chair portion defines a four-sided wood structure, including: the first and second chair frame members 156, 158 oriented parallel to each other; the rear wall member 216 connected to and oriented perpendicular to the first and second chair frame members 156, 158; and the front wall member 162 connected to and oriented perpendicular to the first and second chair frame members 156, 158.
• the base portion 18 also defines a four-sided wood structure, including: the first and second base frame members 40, 42 oriented parallel to each other; the rectangular shaped base platform 22 oriented perpendicular to the first and second base frame members 40, 42; and the third base frame member 48 defining the rear facing wall of the base portion 18.
• a first portion of the weight of the occupant of lift chair 10 is partially distributed by the first and second shaft extension portions 198, 199 of support shaft 172 to each of the first and second base frame members 40, 42.
• a second portion of the occupant weight is distributed, as previously described herein, via tube assembly 188 and lift bar 1 10, to the components of lift mechanism portion 30 and thereby to base platform 22.
• the first base frame member 40 is positioned in a cavity between first inner arm rest member 36 and arm rest outer frame 210 of first arm rest portion 24.
• the second base frame member 42 is positioned in a cavity between second inner arm rest member 38 and an arm rest outer frame 21 1 (similar to arm rest outer frame 210) of second arm rest portion 26.
• the orientation of the frame member forward edge 54 of both the first and second base frame members 40, 42 at angle a and the rearward positioning of the intersecting corner 53 with respect to frame member forward edge 54 provides additional clearance for the occupant's feet to be moved rearward to a position which is closer to the center of gravity of the occupant to aid in standing up from the lift chair full lift position.
• second shoulder bolt 154 is positioned at a fully rearward end of elongated slot 102 and can be in direct contact with a slot rear end wall 224 of elongated slot 102.
• the first shoulder bolt 1 16 (not visible in this view) is similarly positioned with respect to first elongated slot 100.
• the lift bar 1 10 is therefore providing maximum extension height at clevis 200.
• a vertical plane 226 defined at a forward edge 228 of seat frame 182 is oriented perpendicular with respect to a floor surface 230.
• the spacing between vertical plane 226 and base platform forward edge 55 provides additional space for the feet of the occupant to be positioned rearward of vertical plane 226 and therefore closer to a center of gravity of the occupant than known lift chairs. This enhances the ability of the occupant to stand and exit lift chair 10.
• the shoulder bolts such as second shoulder bolt 154 shown, slide within the elongated slots, such as elongated slot 102 shown, toward the high elevation end 106 of the first and second guide members 96, 98.
• the rearward displacement of worm gear slide 90, as well as the increased elevation of the shoulder bolts, provides the maximum lift position.
• the shoulder bolts 1 16, 154 reach the slot rear end wall 224 of each of the respective first and second elongated slots 100, 102, the maximum lift position is reached.
• Lift chair 10 will remain at the full lift position until the occupant redirects operation of lift motor 76 to return lift chair 10 to the nominal position shown in Figure 1 or to any of the other operating positions described herein.
• chair portion 20 is rotated in the chair downward rotational direction ⁇ " until the first frame lower face 212 is parallel with or in contact with upper face 58 of base platform 22.
• the chair rearward tilt position having seat back assembly 14 in its furthest upright position, results in a lowest position for lift bar 1 10 with respect to base platform 22.
• the shoulder bolts 1 16, 154 displace in the first and second elongated slots 100, 102 in the slide returning direction "C", moving toward a slot forward end wall 232.
• the frame member lower end 218 of chair frame rear connecting member 216 is at its lowest elevation position and positioned proximate to base platform 22.
• leg rest mechanism portion 34 is operated such that an extending drive shaft 234, extended by operation of leg rest drive motor 164 from drive connecting member 166, displaces drive rod connecting member 170 and thereby rotates drive rod 168.
• Rotation of drive rod 168 extends leg rest member 16 to the fully extended position.
• Lift bar 100 and the shoulder bolts 1 16, 154, such as first shoulder bolt 1 16 shown, are in positions corresponding to the nominal position of lift chair 10 shown in Figure 1 .
• the only operation required to extend leg rest member 16 is therefore operation of the leg rest mechanism portion 34 by operation of leg rest drive motor 164.
• lift bar 1 10 is elevated compared to the chair rearward tilt position shown in Figure 18, which allows the full rearward rotation of seat back assembly 14 and forward displacement of seat frame 182 in the seat frame extending direction "G". Again, a maximum chair rearward tilt position can be achieved while the leg rest member 16 is in its fully stowed position.
• leg rest mechanism portion 34 can be further operated to extend leg rest member 16 to its fully extended position shown.
• FIG. 22-28 another furniture member 500 is provided.
• the structure and function of the furniture member 500 may be similar or identical to that of the lift chair 10 described above, apart from any exceptions noted below. Therefore, similar features will not be described in detail.
• the furniture member 500 may include a base portion 518 and a chair portion 520 that is rotatably mounted to the base portion 518.
• a lift/recline mechanism 530 is mounted to a base platform 522 of the base portion 518 and is operable to move the chair portion 520 and the base portion 518 among a nominal position ( Figure 22), a "zero-gravity tilt position” or a fully reclined position (Figure 25) and a fully lifted position ( Figure 27). It will be appreciated that the lift/recline mechanism 530 can move the base portion 518 and the chair portion 520 to any position between the reclined and lift positions.
• a legrest mechanism 534 is coupled to the chair portion 520 and a legrest member 516 and is operable to move the legrest member 516 relative to the base portion 518 and the chair portion 520 between a retracted position ( Figures 22 and 27) and an extended position ( Figures 24 and 25).
• the legrest mechanism 534 may be operable independently of the lift/recline mechanism 530.
• the structure and function of the legrest mechanism 534 may be similar or identical to that of the legrest mechanism 34 described above, and therefore, will not be described again in detail.
• the structure and function of the lift/recline mechanism 530 may be similar to that of the mechanism 30 described above, apart from any exceptions described herein and/or shown in the figures. Therefore, similar features will not be described again in detail.
• the mechanism 530 may include the motor 76, the worm drive assembly 88, the first and second guide members 96, 98, and the lift bar 1 10 (shown in Figure 23). As described above, operation of the motor 76 causes the slide 90 to move along the worm assembly 88 and the first and second guide members 96, 98. As described above, a first end of the lift bar 1 10 is coupled to the slide 90 and a second end of the lift bar 1 10 is coupled to the tube assembly 188, which in turn, is coupled to the chair portion 520.
• the lift/recline mechanism 530 also includes an axle 540, first and second legs 542, 544, and a generally L-shaped extension bar 546.
• the axle 540 is rotatably supported by a pair of bearing blocks 548 that are fixedly mounted to the base platform 522.
• a first end 550 of the axle 540 may be fixedly mounted to the first leg 542 by a bracket 552.
• a second end 554 of the axle 540 may be fixedly mounted to the second leg 44 by another bracket 552.
• the axle and the first and second legs 542, 544 are rotatable with each other relative to the base portion 518 and the chair portion 520 (see Figures 22, 25 and 27).
• the first and second legs 542, 544 may be generally U-shaped members that each includes a fore foot 556 and an aft foot 558.
• the base platform 522 may include a plurality of apertures 560 each of which are generally aligned with a corresponding one of the feet 556, 558 of the first and second legs 542, 544. As shown in Figures 23, 26 and 28, the apertures 560 allow the feet 556, 558 to extend through the base platform 522, as will be described in more detail below.
• Figure 29 depicts an alternative configuration of the legs 542, 544.
• the configuration shown in Figure 29 may be a molded plastic, metal or composite component, rather than a tubular metal, plastic or composite component.
• the configuration shown in Figure 29 attaches to the mechanism 530 in the same way as the configuration shown in Figures 22-28 and also functions in the same way.
• another bracket 562 is fixedly attached to the axle 540 between the first end 550 and the first guide member 96.
• the bracket 562 includes first and second members 564, 566 that engage a peg or pin 568.
• a first portion 570 of the extension bar 546 is disposed between the first and second members 564, 566 and includes an elongated slot 572 that slidably receives the pin 568 so that the extension bar 546 can slide relative to the bracket 562 and axle 540.
• the slot 572 can be formed in a block 574 fixedly mounted to the extension bar 546, or the slot 572 can be formed in an integrally formed portion of the extension bar 546.
• a length of the slot 572 is shorter than the lengths of the first and second slots 100, 102 of the first and second guide members 96, 98.
• a second portion 576 of the extension bar 546 may be pivotably coupled to the tube assembly 188.
• the mechanism 530 moves the base portion 518 and the chair portion 520 among the nominal position ( Figure 22), the reclined position ( Figure 25) and the lifted position ( Figure 27).
• the nominal position fore and aft portions 580, 582 of the base platform 522 may contact a flat ground surface 584 upon which the furniture member 500 is situated and support the entire weight of the furniture member 500.
• the fore and aft feet 556, 558 of the first and second legs 542, 544 may contact the ground surface 584 and support the entire weight of the furniture member 500 in the nominal position.
• the fore feet 556 of the first and second legs 542 and the aft portion 582 of the base platform 522 may contact the ground surface 584 and support the entire weight of the furniture member 500.
• the aft feet 558 of the first and second legs 542 and the fore portion 580 of the base platform 522 may contact the ground surface 584 and support the entire weight of the furniture member 500.
• the pin 568 of the bracket 562 of the axle 540 slides relative to the slot 572 of the extension bar 546 until the pin 568 contacts the forward-most end of the slot 572 (as shown in Figure 28). While the pin 568 is sliding relative to the slot 572, the axle 540 remains stationary relative to the base platform 522.
• a comparison of Figures 21 and 25 shows that for exemplary embodiments of the chair 10 and furniture member 500, providing the mechanism 530 with the rotatable legs 542, 544 increases the legrest height of the furniture member 500 by about 6.75 inches (e.g., from 20.25 inches to 27 inches) and increases the recline angle of the furniture member 500 by about nine degrees (e.g., from 12.25 degrees to 21 .25 degrees).
• the additional range of motion provided by rotating the legs 542, 544 to the "zero-gravity tilt" position shown in Figure 25 may be particularly comfortable for many users, as the user's feet (resting on the extended legrest 516) will be positioned at or near the vertical level (i.e., the vertical distance off of the ground 584) of the user's heart.
• This "zero-gravity" positioning of the user's body in the furniture member 500 promotes restfulness and relaxation.
• the additional lift provided by rotating the legs 542, 544 to the position shown in Figure 27 provides additional lift of a user seated in the furniture member 500 toward a standing position, thereby reducing the amount of effort and strength required of the user to stand up out of the furniture member 500. This may be particularly beneficial for elderly or physically disabled users.
• the furniture member 500 may also include structure that causes the seatback frame 514 to recline backward relative to the seat frame 182 and frame member 515 by approximately five degrees, for example, when the furniture member 500 is in the lifted position to prevent unwanted pressure on the occupants head and/or shoulders during when the occupant is getting up out of the furniture member 500 to a standing position.
• a comparison of Figures 22 and 27 illustrate this five-degree recline of the seatback frame 514 (Figure 22 shows an angle X between seatback frame 514 and frame member 515 in the nominal position, and Figure 27 shows an angle of X+5 degrees in the lifted position).
• a pivot bracket 586 is connected to the tube assembly 188, the seatback frame 514 and the seat frame 182 (via swing assemblies 184).
• a pair of slide brackets 588 are attached to the seat frame 182.
• the slide brackets 588 include slots 590 that slidably receive the shaft 172.
• the pivot bracket 586 and the interface between the slide brackets 588 and the shaft 172 allow the balance of weight of the seatback, the seat bottom and the mechanism 530 to determine the amount that the seatback reclines in the lifted position. Therefore, in some embodiments, the seatback may recline by an amount more or less than five degrees in the lifted position.
• mechanisms 530, 534 are described above as being power mechanisms driven by motors 76, 164, in some configurations, either or both of the mechanisms 530, 534 could be manual (i.e., not motor-driven) mechanisms.
• Example embodiments are provided so that this disclosure will be thorough, and will fully convey the scope to those who are skilled in the art. Numerous specific details are set forth such as examples of specific components, devices, and methods, to provide a thorough understanding of embodiments of the present disclosure. It will be apparent to those skilled in the art that specific details need not be employed, that example embodiments may be embodied in many different forms and that neither should be construed to limit the scope of the disclosure. In some example embodiments, well-known processes, well-known device structures, and well-known technologies are not described in detail. [00122] The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting.
• first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as “first,” “second,” and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
• Spatially relative terms such as “inner,” “outer,” “beneath,” “below,” “lower,” “above,” “upper,” and the like, may be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. Spatially relative terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as “below” or “beneath” other elements or features would then be oriented “above” the other elements or features. Thus, the example term “below” can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

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• 2015
  • 2015-08-27 CA CA2959612A patent/CA2959612C/en active Active
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  • 2015-08-27 EP EP15837522.0A patent/EP3193668A4/en not_active Withdrawn
  • 2015-08-27 CN CN201580050814.9A patent/CN106998914B/zh active Active
  • 2015-08-27 KR KR1020177007566A patent/KR101808994B1/ko active IP Right Grant
  • 2015-08-27 BR BR112017003837A patent/BR112017003837A2/pt not_active IP Right Cessation
  • 2015-08-27 NZ NZ729426A patent/NZ729426A/en active IP Right Revival
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• 2017
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