US20140103688A1 - Forward sliding reclining chair - Google Patents

Forward sliding reclining chair Download PDF

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Publication number
US20140103688A1
US20140103688A1 US14/124,914 US201214124914A US2014103688A1 US 20140103688 A1 US20140103688 A1 US 20140103688A1 US 201214124914 A US201214124914 A US 201214124914A US 2014103688 A1 US2014103688 A1 US 2014103688A1
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United States
Prior art keywords
seat
backrest
chair
support
pivot axis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US14/124,914
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English (en)
Inventor
Harold R. Wilson
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PNC BANK
Original Assignee
Haworth Inc
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Filing date
Publication date
Application filed by Haworth Inc filed Critical Haworth Inc
Priority to US14/124,914 priority Critical patent/US20140103688A1/en
Publication of US20140103688A1 publication Critical patent/US20140103688A1/en
Assigned to PNC BANK reassignment PNC BANK COLLATERAL ASSIGNMENT OF PATENTS Assignors: AFFORDABLE INTERIOR SYSTEMS, INC., HAWORTH, INC.
Abandoned legal-status Critical Current

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    • 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
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • 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
    • A47C1/022—Reclining or easy chairs having independently-adjustable supporting parts
    • 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
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03205—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination
    • A47C1/03211—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination by electric motors
    • 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
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03255—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest with a central column, e.g. rocking office chairs
    • 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
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03294—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest slidingly movable in the base frame, e.g. by rollers
    • 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
    • A47C7/02—Seat parts
    • A47C7/024—Seat parts with double seats
    • 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
    • A47C7/02—Seat parts
    • A47C7/14—Seat parts of adjustable shape; elastically mounted ; adaptable to a user contour or ergonomic seating positions
    • 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
    • A47C7/36—Support for the head or the back
    • A47C7/38—Support for the head or the back for the head
    • 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
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/405—Support for the head or the back for the back with double backrests
    • 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
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/46—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs

Definitions

  • This invention relates to an improved reclining swiveling task chair of the type used in offices.
  • the user's back is arched so that their upper back and head remains substantially vertical while their lower back and waist are relatively straightened and significantly reclined.
  • this type of reclined body position (which is referenced throughout the present application), the rearward portion of the chair seat and the lower portion of the chair back support are virtually unused in that the user's body is not being supported by them.
  • the user's body can be in a nearly straight standing posture (except for their arched upper back) yet reclined nearly 45° with respect to the floor while the chair back support may be only partially reclined.
  • Typical reclining office chairs provide substantially planar seat support and back support surfaces that may adequately support the user when the user sits upright, but they do not provide adequate contours and/or bends that will support a user in the above described reclined body position.
  • these typical office chairs do not move between the upright and reclined positions in a manner that provides a proportional transition from the upright to the reclined position that will support a user as they move from upright to the above described reclined body form.
  • Typical reclining office chairs also carry the user's head and shoulders significantly rearward as the user reclines. The result is, before the user can resume working again after assuming the above noted reclined body form, they must walk their chair forward (rolling on the castered base) to maintain the distance between their eyes and the computer display screen.
  • Typical reclining office chairs often provide an adjustable lumbar support device mounted to the chair backrest support.
  • the typical lumbar support remains in the same relationship to the backrest support.
  • the user's upper legs are supported in cantilevered fashion between the seat edge and the floor and the user's lower back is spaced away from the chair backrest and lumbar supports. This may limit or eliminate the effectiveness of the lumbar support while increasing the pressure of the buttocks on the seat ledge.
  • Typical reclining office chairs often provide an adjustable headrest support device mounted to the chair backrest support.
  • the headrest support remains in the same relationship to the backrest support.
  • the headrest is operated by a 4-bar linkage the keep the headrest substantially vertical as the back reclines.
  • This type of headrest tends to bend the users neck so that the users head moves forward with respect to the user's shoulders, affectively pressing the user's chin closer to their chest.
  • the user in the above noted reclined body form may try to overcome this affect by sitting excessively reclined in a reclining chair that is only partially reclined. This keeps the user's upper back and head supported in a substantially vertical orientation with the head comfortably balanced.
  • U.S. Pat. No. 677,234 (Kelly) discloses a lounge chair that moves the seat and lower back forward as the backrest reclines. However, neither the seat nor the backrest of this chair conform to the shaped of a user in the above noted reclined body position. Also, the upper back of a user in this chair tends to fall away from the user's computer monitor, moving the user's eyes significantly rearward.
  • U.S. Pat. No. 5,979,984 discloses a chair that moves the seat forward slightly by pivotally attaching the back support to the stationary chair base. Once again, however, the shape of the seat surface does adequately conform to the shape of a user sitting in the above noted reclined body position. Similarly, the upper back of a user in this chair tends to fall away from the user's computer monitor and other objects sitting on the user's worksurface, moving the user's eyes significantly rearward.
  • U.S. Pat. Nos. 6,820,936 and 7,922,248 each disclose a seat surface with front and rear portions connected by a bend area where the angle of bend increases proportional to the back recline angle.
  • the seat and backrest do not move forward as backrest reclines, leaving the seat out of position, and the backrest (and any lumbar support) spaced away from the back of a person in the above noted recline position.
  • the present invention provides a chair that includes a seat and a backrest that are pivotally connected together at a pivot axis such that the backrest can pivot with respect to the seat between an upright position and a reclining position.
  • the seat is mounted on a base such that the seat can move with respect to a base, and the seat includes front and rear portions that can pivot with respect to one another.
  • both of the seat and the pivot axis move forward with respect to said base, and the seat front portion flexes with respect to the seat rear portion such that the angle between said upward faces of said seat front portion and the seat rear portion increases.
  • the backrest includes an upper portion and a lower portion that can pivot with respect to one another.
  • the angle between the forward faces of the upper and lower backrest portions decreases.
  • the above noted movement of the chair of the present invention provides good back and upper leg support for a user from full upright to an extreme reclined position. More particularly, the progressive bending of the back support in the area just below the user's shoulders maintains the user's head and shoulders substantially upright while the user moves from fully upright to a reclined posture, and the progressive bending of the back support in the area just below the user's shoulders maintains support to the user's lower back while the user moves from fully upright to a reclined posture.
  • the bending of the seat portion of the chair relieves pressure from under the user's upper legs as the user moves from fully upright to a fully reclined position.
  • the angular orientation of the upper portion of the backrest remains substantially the same as the backrest is moved to the reclined position.
  • upper portion of the backrest travels in a substantially vertical plane as the backrest is moved to the reclined position, such that the distance between the upper portion of the backrest and a fixed object in front of the user's chair, such as a computer monitor, remains substantially the same.
  • the chair in another embodiment, includes a lumbar pressure arm and the backrest includes a lumbar support having a surface for supporting the seated user's lower back area.
  • the lumbar support is mounted on a support arm, and the support arm is pivotally mounted to the backrest.
  • the lumbar pressure arm is mounted to the chair and configured to engage the lumbar support arm as the backrest rotates from the upright position to the reclined position.
  • the rotation of the backrest to the reclining position increases the engagement force of the lumbar support arm on the pressure arm, and consequently moves the lumbar support towards a seated user's lower back.
  • the adjustable lumbar support device can thus move forwardly with respect to the chair backrest as the user moves from fully upright to a reclined posture to maintain engagement with the user's back.
  • the movements of the chair can be controlled with electrically powered motion for moving the user from fully upright to intermediate positions or a fully reclined position and returning back to the fully upright position with reduced effort.
  • FIG. 1 is a perspective upper left view of a first embodiment of the forward sliding reclining swivel chair.
  • FIG. 2 is a perspective upper left rear view of a first embodiment of the forward sliding reclining swivel chair.
  • FIG. 3 is a perspective lower left rear view of a first embodiment of the forward sliding reclining swivel chair (having the left frame side removed).
  • FIG. 4 is a front fully reclined view of a first embodiment of the forward sliding reclining swivel chair.
  • FIG. 5 is a rear fully reclined view of a first embodiment of the forward sliding reclining swivel chair.
  • FIG. 6 is a side view of a fully reclined first embodiment of the forward sliding reclining swivel chair.
  • FIG. 7 is a perspective upper right view of a fully reclined first embodiment of the forward sliding reclining swivel chair.
  • FIG. 8 is a perspective lower right view of a fully reclined first embodiment of the forward sliding reclining swivel chair.
  • FIG. 9 is a left side view of a fully reclined first embodiment of the forward sliding reclining swivel chair (having the left frame side removed).
  • FIG. 10 is a left side view of a fully upright first embodiment of the forward sliding reclining swivel chair (having the left frame side removed).
  • FIG. 11 is a left side view of a fully reclined second embodiment of the forward sliding reclining swivel chair.
  • FIG. 12 is a left side view of a fully upright second embodiment of the forward sliding reclining swivel chair.
  • FIG. 13 is a left front upper perspective view of a fully reclined second embodiment of the forward sliding reclining swivel chair.
  • FIG. 14 is a left front lower perspective view of a fully reclined second embodiment of the forward sliding reclining swivel chair.
  • FIG. 15 is a fragmentary underside perspective view of a second embodiment of the forward sliding reclining swivel chair.
  • FIG. 16 is a fragmentary upper rear perspective view of a third embodiment of the forward sliding reclining swivel chair.
  • FIG. 17 is a fragmentary lower right front perspective view of a third embodiment of the forward sliding reclining swivel chair.
  • FIG. 18 is a perspective view of an adjustable roller guide of a third embodiment of the forward sliding reclining swivel chair.
  • FIG. 19 is a left side view of a fully upright fourth embodiment of the forward sliding reclining swivel chair.
  • FIG. 20 is a left side view of a fourth embodiment of the forward sliding reclining swivel chair (shown reclined about one-fourth of the recline stroke).
  • FIG. 21 is a left side view of a fourth embodiment of the forward sliding reclining swivel chair (shown reclined about one-half of the recline stroke).
  • FIG. 22 is a left side view of a fourth embodiment of the forward sliding reclining swivel chair (shown reclined about three-fourths of the recline stroke).
  • FIG. 23 is a left side view of a fully reclined fourth embodiment of the forward sliding reclining swivel chair.
  • FIG. 24 is a left lower perspective view of a fourth embodiment of the forward sliding reclining swivel without wheeled base.
  • FIG. 25 is a front lower perspective view of a fourth embodiment of the forward sliding reclining swivel without wheeled base.
  • FIG. 26 is an upper left perspective view of a fourth embodiment of the forward sliding reclining swivel without wheeled base.
  • FIG. 27 is an upper left front perspective view of a fifth embodiment of the forward sliding reclining swivel chair.
  • FIG. 28 is a left side view of a fully upright fifth embodiment of the forward sliding reclining swivel chair.
  • FIG. 29 is a left side view of a fully reclined fifth embodiment of the forward sliding reclining swivel chair.
  • FIG. 30 is a left side hidden-line view of a fifth embodiment of the forward sliding reclining swivel chair
  • FIG. 31 is a left side hidden-line view of a fully reclined fifth embodiment of the forward sliding reclining swivel chair.
  • FIG. 32 is a perspective upper left rear view of a fifth embodiment of the forward sliding reclining swivel chair.
  • FIG. 33 is a perspective lower left view of a fifth embodiment of the forward sliding reclining swivel chair (with wheeled base removed).
  • FIG. 35 is a front view of a fully upright sixth embodiment of a forward sliding recline swivel chair.
  • FIG. 36 is a rear view of a fully upright sixth embodiment of a forward sliding recline swivel chair.
  • FIG. 37 is a left front lower perspective view of a fully upright sixth embodiment of a forward sliding recline swivel chair.
  • FIG. 38 is a left rear lower perspective view of a fully upright sixth embodiment of a forward sliding recline swivel chair.
  • FIG. 40 is a fragmentary right rear lower perspective view of a fully reclined sixth embodiment of a forward sliding recline swivel chair.
  • FIG. 41 is a fragmentary left front lower perspective view of a fully reclined sixth embodiment of a forward sliding recline swivel chair.
  • FIG. 43 is a fragmentary left front upper perspective view of a fully upright sixth embodiment of a forward sliding recline swivel chair (with seat top plates removed).
  • FIG. 45 is a left front upper perspective view of the seat assembly of the sixth embodiment of a forward sliding recline swivel chair.
  • FIG. 46 is a left front upper perspective view of the roller guide frame assembly of the sixth embodiment of a forward sliding recline swivel chair.
  • FIG. 48 is a right side partially hidden line view of the roller guide frame assembly of the sixth embodiment of a forward sliding recline swivel chair.
  • FIG. 49 is a fragmentary left rear lower perspective view of a fully upright seventh embodiment of a forward sliding recline swivel chair.
  • FIG. 51 is a fragmentary right bottom perspective view of a fully upright seventh embodiment of a forward sliding recline swivel chair.
  • FIG. 52 is a fragmentary left front bottom perspective view of a fully reclined seventh embodiment of a forward sliding recline swivel chair.
  • FIG. 53 is a fragmentary right bottom perspective view of a fully reclined seventh embodiment of a forward sliding recline swivel chair.
  • FIG. 54 is a left side view of a fully upright eighth embodiment of a forward sliding recline swivel chair.
  • FIG. 57 is a left rear lower perspective view of a fully reclined eighth embodiment of a forward sliding recline swivel chair.
  • FIG. 58 is a left rear upper perspective view of the recline guide bar assembly of the eighth embodiment of a forward sliding recline swivel chair.
  • FIG. 60 is a left side view of a fully upright ninth embodiment of a forward sliding recline swivel chair.
  • FIGS. 1-10 there is illustrated a first embodiment of the forward sliding reclining swivel chair 10 A (herein-after referred to as the “chair” for convenience) configured with a power driven recline mechanism.
  • Seat front portion 18 is pivotally supported by guides 28 which are slidingly supported and guided by guide supports 29 .
  • Seat rear portion 19 is pivotally and sliding supported near hinge 20 by guides 30 which are slidingly supported by guide supports 39 of guide frame 15 .
  • Seat rear portion 19 is also pivotally and slidingly supported on rollers 34 within guides 33 .
  • a linear actuator 35 includes motor 41 and screw 42 .
  • the front end of the linear actuator 35 is pivotally mounted to frame 15 at pins 36 .
  • the rear end of linear actuator 35 is pivotally mounted to nut 40 , at the lower end of extension arm 37 of rear seat portion 19 near rollers 34 .
  • Motor 41 may be powered by battery 43 , which may be wire connected through a conventional forward-off-reverse rocker switch (not shown) that is mounted on arm support 44 by a flexible cord (not shown).
  • the operation of the power driven recline and return first embodiment 10 A of the forward sliding reclining swivel chair is accomplished by the user/occupant actuating a rocker switch, which may be mounted on armrest support 44 or another desired location.
  • Switching “forward” (to recline) actuates the motor 35 , which in turn rotates screw 42 so that nut 40 is threadingly pulled forward.
  • the forward movement of nut 40 drives extension arm 37 of seat rear portion 19 along guide 33 .
  • the trajectory of guides 28 and 30 is controlled by the positioning of the guide supports 29 and 39 respectively which guide the seat front portion 18 and rear portion 19 forward.
  • Guide supports 29 and 39 are angled in a predetermined direction such that the front edge of seat front portion 18 progressively slopes downward as hinged junction 20 raises.
  • the lower portion of back support 17 is pulled forward via the pivoting connection between the lower back support portion 22 and the seat rear portion 19 at pivot pins 24 .
  • the back support 17 lower portion 22 bends with respect to the upper portion 21 by pivoting about hinge 23 , and the upper edge 46 of upper portion 21 is consequently pulled downward with the roller 32 traveling downwardly within the roller guide track 31 and the guide 25 traveling downwardly within the guide support 47 .
  • the trajectory of guide 25 and roller 32 are controlled by the positioning of the guide support 47 and guide track 31 respectively.
  • the chair is returned from a reclined position to an upright position by the user/occupant actuating “reverse” on the rocker switch on armrest support 44 which moves seat 16 and back support 17 back their respective upright positions.
  • guide support bracket 50 may be pivotally mounted on guide frame 15 at pivot pin 52 and may be slidably supported on guide frame 15 by shoulder screw 53 .
  • extension arm 54 of guide support bracket 50 is pivotally connected at the lower end 55 to cross connection bar 56 .
  • Cross connection bar 56 has an internally threaded T-portion 57 into which adjusting screw 58 can be turned.
  • Adjusting screw 58 has knob 59 exposed at the forward end to allow easy adjustment.
  • the chair 10 D includes a wheeled base assembly 13 having an upright support post 14 projecting therefrom.
  • the upright support post 14 in turn mounts thereon a guide frame 100 which supports a slidable seat 116 which is pivoted to a reclinable back support 117 , for supporting a seated user/occupant.
  • the wheeled base assembly 13 includes a set of swiveling casters 38 .
  • Seat 116 has front 81 and rear 82 portions that are pivotally connected by hinge 85 .
  • Back support 117 has upper 84 and lower 83 portions that are pivotally connected by hinge 87 .
  • the lower back support portion 83 is pivotally connected to seat rear portion 82 at pivot pins 86 .
  • Guide frame 100 has support posts 115 pivotally mounted thereto. Guide pins 110 securely attached to support posts 115 at attachment point 116 at the forward end thereof. Seat rear portion 82 has bracket extensions 117 securely attached thereto. Bracket extensions 117 has cross bar 109 pivotally attached thereto. Cross bar 109 has holes 120 through which pin 110 is slidingly engaged. Compression spring 80 is guided there through by pin 110 and contained between support posts 115 and cross bar 109 .
  • Upper back portion 84 has armrest support 95 attached thereto. As illustrated, armrest 97 is height adjustably attached to armrest support 95 at slot 96 .
  • FIGS. 27-33 describe a fifth embodiment of the forward sliding reclining swivel chair 10 E. Similar to the previous embodiment, this embodiment is not motor driven. Except as described below, the recline motions operate in generally the same manner as described in connection with embodiment 10 A, but are powered by gravity and the user/occupant while a compression spring (not shown in these illustrations but is applied similar to compression spring 80 in the fourth embodiment) assists the user/occupant in the return stroke back from reclined to upright.
  • a compression spring not shown in these illustrations but is applied similar to compression spring 80 in the fourth embodiment
  • the chair 10 E includes a wheeled base assembly 13 having an upright support post 14 projecting therefrom.
  • the upright support post 14 in turn mounts thereon a guide frame 135 which supports a slidable seat 170 which is pivoted to a reclinable back support 171 , for supporting a seated user/occupant.
  • the wheeled base assembly 13 includes a set of swiveling casters 38 .
  • Seat 170 has a front 125 and rear 127 portions that are pivotally connected by hinge 126 .
  • Back support 171 has upper 128 and lower 129 portions that are pivotally connected by hinge 135 .
  • the lower back support portion 129 is pivotally connected to seat rear portion 127 at pivot pins 133 .
  • the upper back portion 128 is pivotally connected near the bottom thereof to link 130 by pin 131 on upper back portion extension arm 155 .
  • Link 130 is pivotally connected to recline link 134 at pin 140 at the lower end thereof.
  • Recline link 134 is pivotally connected at the upper end thereof to lower back bracket 137 at pin 152 and pivotally connected at the lower end thereof to guide frame 135 at pin 139 .
  • Seat front portion 125 may have a securely attached support bracket 141 extending downwardly therefrom. As shown, support bracket 141 is pivotally connected to guide bar 143 at pin 144 . The trajectory of guide bar 143 may be controlled by the positioning and angle of guide block 165 and guide rollers 166 . Guide block 165 is mounted to guide frame 135 and may be angularly adjustable with respect to the guide frame to enable changes in trajectory of the guide bar 143 . Seat rear portion 127 has securely attached brackets 162 having rollers 151 . Rollers 151 are slidingly engaged in guide track 150 . Seat rear portion 127 has bracket 142 mounted near hinge 126 . Bracket 142 has roller 145 which rolls on guide track bar 146 . Guide track bar 146 is pivotally mounted to cross frame 167 at pin 147 and is adjustably supported by knob-screw 148 .
  • Back support 171 includes frame portions 128 , 129 which are illustrated as open in area 132 . In use, the back support 171 may be covered by a support fabric or membrane that is secured to frame portions 128 , 129 and covering area 132 .
  • FIGS. 34-48 describe a sixth embodiment of the forward sliding reclining swivel chair 10 F.
  • This embodiment is not motor driven. Except as described below, the recline motions operate in generally the same manner as described in connection with embodiment 10 A, but are powered by gravity and the user/occupant while a gas compression spring 280 assists the user/occupant in the return stroke from reclined back to upright.
  • chair 10 F includes a wheeled base assembly 13 having an upright support post 14 projecting therefrom.
  • Upright support post 14 in turn mounts thereon roller guide frame 235 which supports slidable seat assembly 270 which has pivotally connected thereto a reclinable back support 271 , for supporting a seated user/occupant.
  • Support post 14 may include a conventional height adjustable gas spring (not shown) which is height adjustable by actuation of upwardly protruding button 290 at the top end thereof.
  • bracket 291 is pivotally mounted on roller guide frame 235 at pin 292 .
  • Bracket 291 has lever 293 securely attached at the lower end thereof.
  • Bracket 291 has sideward extension 294 located above button 290 . The momentary lifting of lever 293 forces button 290 downward which releases an internal valve of the conventional height adjustable gas spring in post 14 , which allows post 14 to be changed to the user's desired seat height.
  • the upper face of seat assembly 270 may be covered by a layer of foam cushioning and fabric, which is not shown.
  • the wheeled base assembly 13 may include a set of swiveling casters 38 .
  • Seat 270 has front 225 and rear 227 portions that are pivotally connected by hinge 226 .
  • Back support 271 has upper 228 and lower 229 portions that are pivotally connected by hinge 287 .
  • the lower back support portion 229 is pivotally connected to seat rear portion 227 at pivot pin 233 on seat support bracket 262 .
  • Upper back portion 228 is pivotally connected near the lower end thereof to the upper end of a link 230 by pivot pin 231 on extension arm 255 of upper back portion 228 .
  • the lower end of link 230 is pivotally connected to link 234 at pin 240 .
  • link 234 is pivotally connected at the lower end thereof to a bracket 237 of lower back 229 at pin 252 and pivotally connected at the upper end thereof to the rearward end of link 299 at pivot 239 .
  • Link 299 is connected to seat support bracket 262 of seat rear portion 227 at pivot 190 at the forward end thereof.
  • Bracket 237 is also pivotally connected to guide bar 248 at pin 218 .
  • Guide bar 248 is supported and guided by rollers 246 in roller guide frame 235 .
  • Link 230 can be length adjustable when optionally having three parts: upper link 230 A, lower link 230 B and sleeve link 230 C.
  • upper link 230 A has RH threaded lower end
  • lower link 230 B has LH threaded upper end
  • Sleeve link 230 C has mating RH threaded upper end and a mating LH threaded lower end.
  • Seat front portion 225 has securely attached support bracket 241 near the forward end thereof.
  • Support bracket 241 is pivotally connected to guide bar 243 at pin 244 .
  • the trajectory of guide bar 243 is controlled by guide block 265 and guide rollers 266 .
  • Seat rear portion 227 has securely attached bracket 262 having roller 251 .
  • Roller 251 is slidingly engaged in guide track 250 .
  • Guide track 250 may include recess 267 at the rearward end. Pressure from the user's weight pushes seat 271 downward causing roller 251 to engage recess 267 when 271 is in the most rearward location.
  • Seat rear portion 227 has bracket 242 securely attached near the rear underside edge thereof.
  • Guide bar 236 is pivotally mounted to bracket 242 at pin 247 .
  • the trajectory of guide bar 236 is controlled by rollers 245 mounted in guide block 265 .
  • Bracket 275 has ball pivot 274 attached at the forward end thereof.
  • Gas compression spring 280 is pivotally attached to ball pivot 276 at the rearward end 273 and the forward end 272 is pivotally attached to ball pivot 274 .
  • Seat rear portion 227 near the sideward edge has armrest mount bracket 269 securely attached and extending outward therefrom.
  • An armrest assembly 268 may securely attach to the armrest bracket 269 and may extend upwardly therefrom.
  • the seat rear portion 227 includes plate 253 .
  • Plate 253 includes opening 254 and ledge 256 .
  • Ledge 256 supports spring plate 257 for improved cushioning of the user's buttocks.
  • Back support 271 includes frame portions 228 , 229 which define open area 232 .
  • back support 271 may have a support fabric or membrane (not shown) secured to frame portions 228 , 229 and covering area 232 .
  • the back support 271 includes arm 288 pivotally connected to extension 255 at pin 231 and is suspended downwardly therefrom.
  • Arm 288 has bracket 286 slidably/lockably mounted near the lower end thereof.
  • Bracket 286 supports lumbar pressure pad 289 .
  • Bracket 286 has two halves 286 A and 286 B that clamp arm 288 therebetween by the adjustable clamping force of screw-knob 285 thereby making lumbar pressure pad 289 height adjustable on arm 288 .
  • Link 234 has mounted thereon spring arm 284 at the lower end thereof.
  • the upper end of spring arm 284 includes elongated slot 283 .
  • roller bracket 282 is adjustably mounted thereto.
  • Roller bracket 282 has a threaded hole into which screw-knob 281 is attached by passing through elongated slot 283 , clamping spring arm 284 therebetween by the adjustable clamping force of screw-knob 283 , thereby making roller bracket 282 height adjustable on spring arm 284 .
  • Roller bracket 282 includes roller 278 .
  • Roller 278 contacts the rearward face 279 of arm 288 .
  • Pivots on link 234 , lower back 229 , link 299 and bracket 262 form a 4-bar linkage that controls the orientation of link 234 , which keeps the orientation of link 234 substantially the same, regardless of the recline angle of lower back support 229 . Therefore, as lower back 229 reclines, face 279 of arm 288 is forced against roller 278 . This action causes spring arm 284 to resist rearward movement at the upper end thereof and forces arm 288 to pivot forward with respect to lower back 229 , which carries lumbar pressure pad 289 forward to a greater extent than the forward travel of seat 270 , thereby increasing the support pressure on the user's lumbar area. The extent of forward arcing travel of arm 288 is determined by the height that roller 278 contacts face 279 .
  • seat 270 and back support 271 are driven forward and backward respectively by actions initiated by the user.
  • the seat rear portion 227 is caused to move forwardly and also pivot downwardly about an axis defined by the roller 251
  • the seat front portion 225 is caused to move forwardly, and also pivot downwardly about the axis of the hinge 226 to increase the angle between the upper surfaces of the seat front portion 225 and seat rear portion 227 .
  • lower back 229 pivots downwardly about axis 233 , causing pin 218 and the rearward end of guide bar 248 to pivot downwardly about axis 233 , such that the lower back 229 pivots with respect to the seat 270 .
  • the pivoting may occur by structure other than a pivot pin, including a flexible material, a flexible portion of material such as a living hinge, or another type of hinge mechanism.
  • the guide bar 248 applies pressure to rollers 246 which steer guide bar 248 in a forward and downward trajectory which causes seat 270 and axis 233 to move forwardly.
  • guide bar 243 which is pivotally attached to seat front portion 225 , is carried along and follows a trajectory controlled by rollers 265 in roller guide frame 235 .
  • the trajectory of guide bar 243 as it moves through the rollers 265 causes the seat front portion 225 to pivot downwardly about hinge 226 as seat 270 moves forwardly.
  • FIGS. 60 , 61 illustrate that in similarly functioning embodiments 10 F, 10 G, 10 H and 10 J, the axis 287 (or 487 ) remains substantially horizontally stationary over base 13 as seat 270 and axis 233 move forward.
  • the initial force required to recline lower back 229 is increased when seat 271 is located fully rearward due to the additional force required to drive roller 251 out of the recess 267 in guide track 250 .
  • the extent of recline angle of lower back 229 can be controlled by the distance that the guide bar 248 is allowed to travel.
  • the arcing travel of seat rear portion 227 is controlled by the trajectory of guide bar 236 .
  • the arcing travel of seat front portion 225 is controlled by the trajectory of guide bar 243 .
  • FIGS. 49-53 describe a seventh embodiment of the forward sliding reclining swivel chair 10 G.
  • the basic structure and motions of chair 10 G are nearly identical to chair 10 F except that the motions are powered by an electric linear actuator 380 that replaces gas spring 280 .
  • Roller guide frame 335 includes all the components of roller guide frame 235 except bracket 275 and ball pivot 274 are replaced by bracket 375 and pivot pin 374 .
  • Seat rear portion 327 includes all the components of seat rear portion 227 except bracket 277 and ball pivot 276 are replaced by bracket 377 and pivot pin 376 .
  • Linear actuator 380 includes body portion 310 and drive rod 396 .
  • Body portion 310 includes motor 394 and screw housing 395 .
  • Linear actuator 380 is pivotally attached to bracket 377 at pivot pin 376 near the rearward end 397 of screw housing 395 thereof.
  • Drive rod 396 is pivotally attached to bracket 375 at pivot pin 374 at the forward end thereof.
  • the operation of linear actuator 380 is conventional in that, the shaft (not shown) of motor 394 rotates a jackscrew (not shown) within screw housing 395 .
  • the rearward end (not shown) of drive rod 396 includes a threaded nut that is engaged with the jackscrew. Jackscrew rotation in one direction extends drive rod 396 outward from body portion 310 . Jackscrew rotation in the opposite direction retracts drive rod 396 inwardly into body portion 310 .
  • Motor 394 is powered by battery 343 which is wire connected through a conventional Forward-off-reverse rocker switch (not shown) that is mounted on armrest support 268 by a flexible cord (not shown).
  • the operation of the power driven recline and return motions of the seventh embodiment 10 G are accomplished by the user/occupant actuating the rocker switch on armrest support 268 .
  • Switching the rocker switch to “forward” (to recline) rotates motor and jackscrew so that the nut on drive rod 396 is threadingly pulled rearward, retracting drive rod 396 .
  • Retracting drive rod 396 pulls body portion 310 forward, seat 270 forward and lower backrest 229 forward and downward, while simultaneously proportionally bending the upward surface of seat 270 and the forward surface of backrest 271 .
  • FIGS. 54-58 describe an eighth embodiment of the forward sliding reclining swivel chair 10 H.
  • This embodiment is not motor driven.
  • the recline motions are powered by gravity and the user/occupant while a gas compression spring 480 assists the user/occupant in the return stroke from reclined back to upright.
  • Chair 10 H includes a wheeled base assembly 13 having an upright support post 14 projecting therefrom which includes a conventional height adjustable gas spring (not shown).
  • Upright support post 14 in turn mounts thereon roller guide frame 435 which supports slidable seat assembly 470 which has pivotally connected thereto reclinable back support 471 , for supporting a seated user/occupant.
  • seat assembly 470 will normally be covered by a layer of foam cushioning and fabric, which is not shown.
  • the wheeled base assembly 13 includes a set of swiveling casters 38 .
  • Seat 470 has front 425 and rear 427 portions that are pivotally connected by hinge 426 .
  • Back support 471 has upper 428 and lower 429 portions that are pivotally connected by hinge pivot 487 .
  • Lower back support portion 429 is pivotally connected to seat rear portion 427 at pivot pin 433 on seat support bracket 462 for angular travel between upright and reclined positions.
  • Upper back portion 428 is pivotally connected near the lower end thereof to the upper end of link 430 by pivot pin 431 on extension arm 455 of upper back portion 428 .
  • Guide bar 448 includes securely attached bracket 434 at the rearward end thereof. Bracket 434 includes pivot 440 near the upper end thereof.
  • Link 430 is pivotally connected to guide bar 448 at pivot 440 at the lower end thereof.
  • Lower back portion 429 is also pivotally connected to guide bar 448 at pivot 418 for controlling the extent of upright to recline angular travel.
  • Guide bar 448 is supported and guided by rollers 446 in roller guide frame 435 .
  • Guide bar 448 between pivots 440 and 418 , lower back portion 429 between pivots 487 and 418 , link 430 between pivots 431 and 440 and upper back 428 between pivots 487 and 431 form a 4-bar linkage that controls the orientation of upper back 428 . Due to the straight trajectory of guide bar 448 , guided by rollers 446 , as disclosed in chair 10 H, the orientation of upper back 428 remains substantially the same regardless of the recline angle of lower back support 429 .
  • Seat front portion 425 has securely attached support bracket 441 near the forward end thereof.
  • Support bracket 441 is pivotally connected to guide bar 443 at pivot 444 .
  • the trajectory of guide bar 443 is controlled by guide block 465 and guide rollers 466 .
  • Seat rear portion 427 has securely attached bracket 462 and includes securely attached guide roller 451 .
  • Guide roller 451 is slidingly engaged in guide track 450 .
  • Seat rear portion 427 includes bracket 442 near the rear underside edge thereof.
  • Guide bar 436 is pivotally attached to bracket 442 at pivot 447 .
  • the trajectory of guide bar 436 is supported and controlled by rollers 445 mounted in guide block 465 .
  • Bracket 477 has ball pivot 476 at its rearward end.
  • Roller guide frame 435 includes bracket 475 projecting forwardly from the upper side thereof.
  • Bracket 475 has ball pivot 474 attached at the forward end thereof.
  • Gas compression spring 480 is pivotally attached to ball pivot 476 at the rearward end 473 and the forward end 472 is pivotally attached to ball pivot 474 .
  • Armrest mount bracket 469 extending outward therefrom.
  • Armrest bracket 469 has securely and height-adjustably attached armrest assembly 468 extending upwardly therefrom.
  • Back support 471 includes frame portions 428 and 429 which defines area 432 therebetween. In use, back support 471 will have a support fabric or membrane (not shown) secured to frame portions 428 , 429 and covering area 432 .
  • Lower back portion 429 has arm 488 pivotally attached at pivot 453 and projecting upwardly therefrom.
  • Arm 488 has bracket 486 mounted near the upper end thereof. Bracket 486 supports lumbar pressure pad 489 .
  • Spring arm 484 is securely mounted on bracket 434 of guide bar 448 at the lower end thereof.
  • Roller mount bracket 482 is mounted near the upper end of spring arm 484 .
  • Roller 478 is pivotally attached to roller mount bracket 482 .
  • Roller 478 contacts the rearward face 479 of arm 488 .
  • seat 470 and back support 471 are driven forward and backward respectively.
  • the forward travel results from the cam action pressure of guide bar 448 against rollers 446 as lower back 429 arcs downward.
  • the extent of recline angle of lower back 429 is controlled by the distance guide bar 448 is allowed to travel.
  • the arcing travel of seat rear portion 427 is controlled by the trajectory of guide bar 436 .
  • the arcing travel of seat front portion 425 is controlled by the trajectory of guide bar 443 .
  • FIGS. 59-61 describe a ninth embodiment of the forward sliding reclining swivel chair 10 J.
  • This embodiment is identical to embodiment 10 F ( FIGS. 34-48 ) with the addition of a headrest support 215 extending upwardly from upper portion 228 of back support 271 .
  • vertical phantom line 217 aligns with pivot 233
  • vertical phantom line 216 aligns with pivot 287 indicating the horizontal locations of pivots 233 and 287 with respect to base 13 in full upright ( FIG. 60 ) and fully reclined ( FIG. 61 ).
  • the seat forward movement distance for the above embodiments ranges from 10-inches for chair 10 A to 6-inches for chair 10 F.
  • the best forward movement range is five to seven inches.
  • the best performance for any of the above embodiments is achieved when the seat back upper portion does not move significantly rearward as the seat moves forward.
US14/124,914 2011-06-09 2012-06-08 Forward sliding reclining chair Abandoned US20140103688A1 (en)

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US14/124,914 US20140103688A1 (en) 2011-06-09 2012-06-08 Forward sliding reclining chair
PCT/US2012/041626 WO2012170863A2 (en) 2011-06-09 2012-06-08 Forward sliding reclining chair

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US11197549B1 (en) 2020-09-28 2021-12-14 La-Z-Boy Incorporated Wall-proximity furniture member having sync mechanism
US11622629B2 (en) 2020-09-28 2023-04-11 La-Z-Boy Incorporated Wall-proximity furniture member having sync mechanism
US11602224B2 (en) * 2020-12-31 2023-03-14 Xiaozhao ZHANG Headrest device and chair having the same
US20220202188A1 (en) * 2020-12-31 2022-06-30 Xiaozhao ZHANG Headrest device and chair having the same

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WO2012170863A2 (en) 2012-12-13
ES2565385T3 (es) 2016-04-04
EP2717742B1 (en) 2015-12-16
EP2717742A2 (en) 2014-04-16

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