USRE36335E - Flexible chair - Google Patents

Flexible chair Download PDF

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Publication number
USRE36335E
USRE36335E US08/786,994 US78699497A USRE36335E US RE36335 E USRE36335 E US RE36335E US 78699497 A US78699497 A US 78699497A US RE36335 E USRE36335 E US RE36335E
Authority
US
United States
Prior art keywords
seat
chair
curvilinear
support legs
user
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.)
Expired - Lifetime
Application number
US08/786,994
Other languages
English (en)
Inventor
Charles O. Perry
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DEPERRY SHEILA H
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from US07/381,151 external-priority patent/US5009466A/en
Priority claimed from US08/238,415 external-priority patent/US5383712A/en
Application filed by Individual filed Critical Individual
Priority to US08/786,994 priority Critical patent/USRE36335E/en
Application granted granted Critical
Publication of USRE36335E publication Critical patent/USRE36335E/en
Assigned to DEPERRY, SHEILA H. reassignment DEPERRY, SHEILA H. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: PERRY, CHARLES O.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • A47C1/032—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
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/02—Rocking chairs
    • A47C3/021—Rocking chairs having elastic frames
    • A47C3/023—Rocking chairs having elastic frames made of tubular material
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/04—Stackable chairs; Nesting chairs
    • 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
    • A47C7/44—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame

Definitions

  • This Invention relates to high density stacking chairs of the type used by hotels for meeting room chairs.
  • a dolly is provided which holds a stack of chairs which are stacked as densely as possible.
  • a single continuous frame has a seat and a pivoting back attached thereto. Ergometric adjustment of the chair is accomplished by tilting of the back and flexure of the frame. Flexure of the frame urges the back into a normal upright position for stacking and uniform appearance.
  • the back is curved and hollow, and engages the frame at upper and lower curved sections of the frame, which sections have radii of curvatures less than that of the back and which sections are positioned at a downward angle such that the effective horizontal radii of the sections in the upright position is shorter than the actual radii, causing the back to rest against the curved sections and limit forward tilting of the back.
  • the high density flex chair is an armchair. I have accomplished this result simply by changing the shape of the rear legs so that the chair not only has the advantage of being an armchair but also has the advantage that it can be manufactured to some extent with tooling common to the manufacturing tooling of the armless chair.
  • FIG. 1 is a perspective view of a chair built according to the present invention.
  • FIGS. 3-5 are side plan views showing how the chair back flexes through its range of backward tilt.
  • FIG. 6 is a view taken across section 6--6 of FIG. 4 (seat back omitted) and represents a plan view of the chair according to the present invention in a partially tilted position.
  • FIG. 8 is a top plan view (seat back omitted) of a chair built according to the present invention in the normal rest position.
  • FIG. 9 is a side plan view of a stack of two chairs according to the present invention.
  • FIG. 10 is a rear plan view of the stack of FIG. 9.
  • FIG. 11 is a perspective view of an alternative embodiment of the chair of this invention illustrating in phantom a second chair stacked on top of the first chair;
  • FIG. 12 is a perspective view similar to FIG. 11 showing the manner in which the chair of FIG. 11 reclines;
  • FIG. 13 is a side elevational view of the chair and phantom chair of FIG. 11;
  • FIGS. 14 and 15 are top and front elevational views of the chair of FIG. 11, respectively;
  • FIG. 16 is in exploded view of the frame of the chair of FIG. 11, and
  • FIG. 17 is a detailed view of a part of FIG. 6.
  • FIG. 1 a first embodiment of a chair according to the present invention is shown.
  • the back 30 is curved to adapt to a user's back and is composed of a front section 32 and a rear section 34, each of which has a lip 33, 35 or other spacer which creates a hollow interior space between sections when they are attached.
  • the frame 10 has a pair of rear support legs 16 which extend downward and rearward to a floor surface. Bottom legs 17 extend forwardly along the floor. A pair of front support legs 18 then extend upward and rearward to the front of the seat 20.
  • the seat supporting portion 15 extends rearward supporting the seat 20, then slightly inward, then upward into the back 30, then inward, where the back is again pivotally attached at pivot connections 14a.
  • the frame 10 continues to a lower curved section 14 which is enclosed within the back and which extends through the back at a downward angle.
  • the distance d 1 between the opposing legs of the frame 10 as it sits on the floor is less than the width d 2 of the seat 20, so as to facilitate stacking a plurality of such chairs.
  • FIGS. 3-5 the tilting action of the back 30 is illustrated.
  • the rear support legs 16 of the frame 10 are inclined at a forward angle so as to provide a natural spring-type action which holds the back 30 forward.
  • the front section 32 pivots about point 50 on the upper curved section, causing the upper half of the front section to rotate backwards, and the lower half to rotate forward about point 50.
  • the seat 20 will be lifted by the forward rotation of the lower curved section 14. Since the back 30 has a greater radius of curvature than both curved sections, the back lifts away from the curved sections as it is tilted, reengaging the curved sections at points 38 and 39, located further down the back, where the effective radius of the back portion is again equal to the radii of the curved sections after the back has tilted 45 degrees.
  • FIG. 6 A clearer view of the relationship of the curved sections 12 and 14 to the overall frame structure 10 is illustrated in FIG. 6 where the cylindrical sections of the frame 12a, 14a are providing straight bearing areas.
  • FIGS. 8-10 Stacking of the chair of the present invention is illustrated with reference to FIGS. 8-10.
  • the seat supporting portions 15 of frame 10 are positioned inwardly but substantially parallel of the floor engaging or bottom portions 17 of frame 10.
  • the rear portions of seat supporting portions 15 are angled further inward in conformance with the shape of the seat 20, and then rise upward forming lower curved section 14.
  • the front portions of seat supporting portions 15 turn downward near the front of the seat 20 forming front support legs 18.
  • the front support legs 18 are substantially vertical, thus remaining inward of the bottom legs 17. However, near the floor each front support leg 18 is bent outwardly at a slight angle to form into the bottom legs 17.
  • a stacking tab 19 is welded on the outside near the bend of each front support leg 18 to provide for indexed stacking of chairs.
  • chair B is stacked on top of chair A. It can be seen that the front corner of the bottom legs 17B rest on spacing tabs 19A. Further, rear stabilizer 50B, which has a radius of curvature similar to the seat 20, rests in the opening between the seat 20 and back 30. It will be noted that the upper chair B is offset forwardly from the lower chair A so that the seats of a stack of chairs will occupy a volume which extends upwardly and forwardly, and the bottom legs 17 lay outside the volume. Thus, the bottom legs 17B are wider at the front end thereof than the front legs 18A and are wider at the rear end thereof than the volume occupied by the stack of chairs, such that chair A and chair B stack tightly and neatly.
  • the chair illustrated therein comprises a seat 110 and a back 112 which has an upper region 114 and a lower region 116.
  • the chair has a metal frame which is preferably made of 7/16 inch 1008 steel rod and 5/8 inch steel tube with a 3/32 inch wall thickness.
  • the rod portion of the frame is generally the same as the frame of the armless chair with the back and bottom leg portions replaced by the tube.
  • the frame is pivotally connected to the upper region of the back at 118 with a pivotal connection 120 between the seat 110 and the lower region 116 of the back 112.
  • the frame has a pair of legs each having a back leg portion 122, a bottom leg portion 124 and a front leg portion 126 which are labeled with the letters "R" and "L” for the right and left legs with the top of the front legs 126 supporting the seat 110.
  • the pivotal connections 118 and 120 between the fame and the back 112 are preferably provided by the pivot limiting structure of the chair which is generally shown in FIGS. 3-5 and the connection between the frame and the seat 110 is preferably provided in the same manner as the connections in the commercial armless chair so that the two chairs can be made with similar manufacturing tooling.
  • the chair of this embodiment differs from the chair shown in FIG. 7 in that the back leg portions 122 extend from the pivot connection 118 forwardly generally outside the bottom leg portion 174 for a sufficient distance to form an arm rest 128 and then downwardly and rearwardly to the bottom leg portion 124, and the back leg portions, arms and bottom leg portions are made of tubing which slips over the rod portion of the frame and is welded to the rod at welds 121 and 125. Note that there is a slight horizontal bend in the arm 128, best seen in FIGS. 14 and 16 which position the forward part of the arm outside the bottom leg portions.
  • Stops are provided on the chair frame for stabilizing the chair in a stack. These stops comprise a pair of tabs 130 on the front legs 126 which support the bottom leg portions of an upper chair in the stack and a cross strut 132 (see particularly FIG. 13) which engages the top of the seat of a lower chair in the stack.
  • the frame also has a metal tab 134 on each chair arm to which a padded armrest may be attached. As illustrated in FIG. 17, a slot 136 is provided in the tube to permit the tube to drain where the frame may be plated after welding.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs Characterized By Structure (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Stackable Containers (AREA)
US08/786,994 1988-04-25 1997-01-23 Flexible chair Expired - Lifetime USRE36335E (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US08/786,994 USRE36335E (en) 1988-04-25 1997-01-23 Flexible chair

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
US18570788A 1988-04-25 1988-04-25
US07/381,151 US5009466A (en) 1988-04-25 1989-04-24 Reclining chair
US50671690A 1990-04-10 1990-04-10
US75773491A 1991-09-11 1991-09-11
US79335792A 1992-01-09 1992-01-09
US08/238,415 US5383712A (en) 1988-04-25 1994-05-06 Flexible chair
US08/786,994 USRE36335E (en) 1988-04-25 1997-01-23 Flexible chair

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
US79335792A Continuation 1988-04-25 1992-01-09
US08/238,415 Reissue US5383712A (en) 1988-04-25 1994-05-06 Flexible chair

Publications (1)

Publication Number Publication Date
USRE36335E true USRE36335E (en) 1999-10-12

Family

ID=24015733

Family Applications (1)

Application Number Title Priority Date Filing Date
US08/786,994 Expired - Lifetime USRE36335E (en) 1988-04-25 1997-01-23 Flexible chair

Country Status (12)

Country Link
US (1) USRE36335E (ja)
EP (1) EP0539377B1 (ja)
JP (2) JPH0815446B2 (ja)
KR (1) KR0182297B1 (ja)
AT (1) ATE167369T1 (ja)
AU (1) AU651971B2 (ja)
CA (1) CA2080248C (ja)
DE (1) DE69129628T2 (ja)
ES (1) ES2118081T3 (ja)
IL (1) IL97762A (ja)
NZ (1) NZ237726A (ja)
WO (1) WO1991015139A1 (ja)

Cited By (37)

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USD466712S1 (en) 2002-07-17 2002-12-10 Lifetime Products, Inc. Chair
USD472723S1 (en) 2002-07-23 2003-04-08 Lifetime Products, Inc. Chair frame
USD472745S1 (en) 2002-07-23 2003-04-08 Lifetime Products, Inc. Chair back and seat
USD477926S1 (en) 2002-05-29 2003-08-05 Lifetime Products, Inc. Chair
US6672669B2 (en) 2001-04-30 2004-01-06 First Source Furniture Group Llc Swingable chair back with top pivot
US6722735B2 (en) 2001-04-16 2004-04-20 Ditto Sales, Inc. Chair with synchronously moving seat and seat back
US20040075328A1 (en) * 2002-10-16 2004-04-22 Royal Seating Corporation Versatile chair system
US20050035636A1 (en) * 2003-08-13 2005-02-17 Turner Dennis M. Chair with pivotable chair back
EP1559348A2 (en) 2004-01-29 2005-08-03 Charles O. Perry Flexible chair with post base
US20050264072A1 (en) * 2004-05-06 2005-12-01 Perry Charles O Flexible reclining chair
US7114782B2 (en) * 2004-05-26 2006-10-03 Center For Design Research And Development N.V. Flexible chair with stiffener inserts and method for forming a chair
US20090096266A1 (en) * 2007-10-11 2009-04-16 Chun-Chang Tai Seat frame assembly
US20100244515A1 (en) * 2009-03-31 2010-09-30 Dragomir Ivicevic Reclining Chair
US7806473B1 (en) 2005-11-21 2010-10-05 Faiks Frederick S Stackable chair and framework therefor
USRE42027E1 (en) 2009-05-08 2011-01-18 Aichi Co., Ltd Chair
USD668072S1 (en) 2009-03-09 2012-10-02 Aichi Co., Ltd. Chair
USD669278S1 (en) 2009-05-08 2012-10-23 Aichi Co., Ltd. Chair
US20120292967A1 (en) * 2011-05-20 2012-11-22 Jeremy Cailleteau Kinematic seat with elastic pivot
US8419133B2 (en) 2007-01-29 2013-04-16 Herman Miller, Inc. Seating structure with independently adjustable back
US20130169014A1 (en) * 2007-03-13 2013-07-04 Hni Technologies Inc. Dynamic chair back lumbar support system
USD731833S1 (en) 2014-04-17 2015-06-16 Allsteel Inc. Chair
USD731805S1 (en) * 2013-11-20 2015-06-16 B&B Italia S.P.A. Chair
US9332851B2 (en) 2013-03-15 2016-05-10 Hni Technologies Inc. Chair with activated back flex
US9504326B1 (en) 2012-04-10 2016-11-29 Humanscale Corporation Reclining chair
USD796883S1 (en) 2014-10-15 2017-09-12 Hni Technologies Inc. Chair
US9801470B2 (en) 2014-10-15 2017-10-31 Hni Technologies Inc. Molded chair with integrated support and method of making same
US10016061B2 (en) 2016-02-15 2018-07-10 Interstuhl Bueromoebel Gmbh & Co. Kg Backrest for an office chair
US10064493B2 (en) 2014-04-17 2018-09-04 Hni Technologies Inc. Flex lumbar support
US10206513B2 (en) 2016-02-15 2019-02-19 Interstuhl Bueromoebel Gmbh & Co. Kg Piece of seating furniture having a backward-tilt stop
US10927545B2 (en) 2010-05-05 2021-02-23 Allsteel Inc. Modular wall system
US20210146634A1 (en) * 2019-11-14 2021-05-20 Aussco Hong Kong Limited Three-dimensional loop structure by additive printing
US11253078B2 (en) * 2018-08-02 2022-02-22 Whiteside Mfg. Co Mobile chair
US11266244B2 (en) * 2018-02-16 2022-03-08 Barrett Studios, Inc. Chair assembly
US11382429B2 (en) * 2018-05-30 2022-07-12 Aichi Co., Ltd. Backrest and chair
US20220295996A1 (en) * 2021-03-18 2022-09-22 Pro-Cord S.P.A. Chair with pivoting seat and backrest
US20220378208A1 (en) * 2019-06-17 2022-12-01 Quali Co., Ltd. Tilt chair
US11559141B2 (en) 2019-08-30 2023-01-24 Itoki Corporation Chair

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JP4792234B2 (ja) * 2005-03-02 2011-10-12 株式会社イトーキ 椅子
JP4792233B2 (ja) * 2005-03-02 2011-10-12 株式会社イトーキ 椅子
ES2255466A1 (es) * 2006-02-17 2006-06-16 Sellex. S.A Mueble de asiento.
JP4896631B2 (ja) * 2006-08-29 2012-03-14 株式会社イトーキ 椅子
KR100754469B1 (ko) 2006-12-14 2007-09-03 김성수 의자
CN111288869B (zh) * 2020-02-28 2021-09-24 保隆(安徽)汽车配件有限公司 一种新型通止规装置

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Also Published As

Publication number Publication date
JPH1033294A (ja) 1998-02-10
DE69129628D1 (de) 1998-07-23
JP3065274B2 (ja) 2000-07-17
EP0539377A1 (en) 1993-05-05
IL97762A (en) 1994-08-26
AU7691691A (en) 1991-10-30
WO1991015139A1 (en) 1991-10-17
JPH05507632A (ja) 1993-11-04
CA2080248C (en) 1996-10-29
AU651971B2 (en) 1994-08-11
JPH0815446B2 (ja) 1996-02-21
KR0182297B1 (ko) 1999-05-01
CA2080248A1 (en) 1991-10-11
NZ237726A (en) 1994-08-26
DE69129628T2 (de) 1998-10-15
EP0539377A4 (en) 1993-06-16
IL97762A0 (en) 1992-06-21
EP0539377B1 (en) 1998-06-17
ATE167369T1 (de) 1998-07-15
ES2118081T3 (es) 1998-09-16

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