EP0962170A2 - Ausziehbarer Sitz - Google Patents

Ausziehbarer Sitz Download PDF

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Publication number
EP0962170A2
EP0962170A2 EP99650045A EP99650045A EP0962170A2 EP 0962170 A2 EP0962170 A2 EP 0962170A2 EP 99650045 A EP99650045 A EP 99650045A EP 99650045 A EP99650045 A EP 99650045A EP 0962170 A2 EP0962170 A2 EP 0962170A2
Authority
EP
European Patent Office
Prior art keywords
seat
seat pan
extendable
lever
pan
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.)
Withdrawn
Application number
EP99650045A
Other languages
English (en)
French (fr)
Other versions
EP0962170A3 (de
Inventor
Ron J. Keilhauer
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.)
Keilhauer Industries Ltd
Original Assignee
Keilhauer Industries Ltd
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
Application filed by Keilhauer Industries Ltd filed Critical Keilhauer Industries Ltd
Publication of EP0962170A2 publication Critical patent/EP0962170A2/de
Publication of EP0962170A3 publication Critical patent/EP0962170A3/de
Withdrawn legal-status Critical Current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
    • A47C1/022—Reclining or easy chairs having independently-adjustable supporting parts
    • A47C1/023—Reclining or easy chairs having independently-adjustable supporting parts the parts being horizontally-adjustable seats ; Expandable seats or the like, e.g. seats with horizontally adjustable parts

Definitions

  • This invention relates to a seat, and in particular, to an extendable seat for a chair.
  • chairs with adjustable seat portions are well known, especially in the field of office furniture.
  • Chairs which do not encourage healthy posture may lead to various health problems for the user, such as back or neck pain.
  • office chairs are often provided with seats which are adjustable and correspond to the position of the user's buttocks and thighs.
  • One of the ways the chairs may be adjusted, is by horizontally translating the seat closer to or further from the back support in a generally perpendicular direction therefrom, in order to provide optimal support for the upper legs (up to the knee) of the user.
  • adjusting a seat in this manner may affect the posture of the user by forcing his/her buttocks further away from the back of the chair. Accordingly, seats have been developed which extend or lengthen in order to accommodate varying leg lengths.
  • US Patent No. 5,370,444 discloses a seat which includes a number of transverse openings which widen to permit the seat to extend. However, the openings do not penetrate the entire height of the seat cushion. A section of cushion material remains to cover the top of the openings. This configuration is disadvantageous because sufficient material must remain to allow it to extend as the seat widens. Accordingly, in the unextended position, the covering material must be folded into the opening in an unsightly manner which may also cause discomfort to the user.
  • the extendable seat for comprises a seat cushion having an extending section.
  • the extendable seat preferably also includes a first portion proximate to the back of the chair, and a second portion positioned forward of the first portion.
  • the first portion is fixed in the longitudinal plane in relation to the chair back, and the second portion includes the extending section as well as a forward section.
  • the extending section defines a plurality of transverse slits extending therethrough, the seat cushion being adapted to extend longitudinally upon opening of the slits.
  • the slits are preferably arranged in a plurality of transversely running rows, wherein the extending section is adapted to lengthen longitudinally upon opening of the slits, and the forward section being adapted for movement by the extending section.
  • the extendable seat preferably includes a support assembly having:
  • Figs. 1 and 2 show the extendable seat cushion 1 , which is made from any suitable resilient and expandable material, such as an expandable foam.
  • the foam is a conventional two-component urethane foam, such as a non-CFC producing flexible polyurethane, based on a polyol blend and diphenylmethane. This foam is commonly referred to as MDI foam.
  • the cushion 1 includes, at least a first portion 2 adjacent to the back of the chair (not shown), which is preferably fixed in the horizontal direction.
  • the cushion also includes an extendable and preferably integral second portion 3 located forward of the first portion.
  • the first portion is preferably formed to conform to the shape of a users buttocks and upper legs in order to promote proper posture.
  • the second portion includes an extending section 4 where a plurality of transverse slits 5 are cut through the entire thickness of the cushion.
  • This design permits the manufacture of a cushion to having a unitary construction, and eliminates the unsightly and uncomfortable bunching or folding of cushion material in the home (or unextended) position of the prior art cushions.
  • the slits are preferably formed by a conventional cutting die and are preferably arranged in rows. The actual number of rows of slits can vary depending on the size of the seat, but is preferably an even number.
  • the location, shape, and orientation of the slits 5 preferably allows the foam to be extended only within the extending section 4 of the second portion 3 (as best shown in Fig. 2).
  • an integral front section 6 which is moved by the extending section, but which does not include the slits, is positioned forward of the first section.
  • the cushion is secured to a support assembly (shown in Figs. 3-8) described in detail below.
  • the cushion 1 may be supported by any suitable support assembly.
  • Figures 3-8 show a preferred support assembly. In the interest of clarity, the cushion is not shown in Figs. 3-8.
  • a first seat pan 10 is secured to the first portion 2 of the cushion 1 (shown in Figs. 1 and 2) by any conventional means, such as an adhesive or screws.
  • the first seat pan is preferably fixed in the horizontal direction.
  • Two longitudinally running roller bearing rails 11 are secured to a recessed front portion 12 of the first seat pan by screws
  • a depression 41 in the recessed front portion houses an actuating structure described in detail below.
  • a second seat pan 13 is secured to the front section 6 of the second portion 3 (shown in Figs. 1 and 2) of the cushion by any conventional means, such as and adhesive or screws.
  • the second seat pan is slidably received within the recessed front portion of the first seat pan.
  • Two longitudinally running sliding members 14 are received within the rails, and are secured to the underside of the second seat pan by screws.
  • the seat pans can be made from any suitable material such as, for example, a hard plastic, wood, or steel.
  • the cushion 1 may be extended by any suitable actuating structure.
  • Figures 5-8 show a preferred actuating structure.
  • a first end 20 of an L-shaped lever 21 is pivotally connected to the first seat pan 10 by any suitable means, such as a pin.
  • a vertex 22 of the lever is secured to the second seat pan 13 (not shown in Figs. 7 and 8 for clarity) preferably by a bolt 34 .
  • a second end 23 of the lever is pinned to a slide block 24 by a slide pivot pin 25 .
  • a channel 26 is defined in the slide block, in which a threaded slide nut 27 (shown in Fig. 5) is secured.
  • a correspondingly threaded rod 28 is received within the nut and is positioned in the channel.
  • the threaded rod projects transversely from the side of the second seat pan 13 through an opening 29 (shown in Fig. 5).
  • An adjustment knob 30 is secured to the projecting end of the threaded rod by a knob locking pin (not shown).
  • a lock washer 32 (shown in Fig. 5) is secured within a groove 33 defined in the threaded rod. The lock washer abuts against the edge of the opening 29 in the side of the second seat pan 13 .
  • Figures 1, 3, 6, and 7 show the seat in the unextended or home position.
  • the second seat pan 13 is fully received within the recessed portion 12 of the first seat pan 10 such that the second seat pan abuts and is flush with a ridge 40 .
  • a user can extend the seat by rotating the adjustment knob 30 on the threaded rod 28 .
  • the threaded rod is prevented from transverse movement relative to the second seat pan 13 by the lock washer 32 which abuts against the side of the second seat pan.
  • the rotation of the threaded rod within the threaded slide nut 27 causes the slide block 24 to travel transversely along the threaded rod away from the side of the second seat pan 13 .
  • the movement of the slide block causes the lever 21 to pivot, which in turn causes the bolt 34 in the vertex 22 of the lever 21 to move forward.
  • the bolt moves the second seat pan 13 forward causing sliding members 14 to slide away from the front seat pan 10 along the rails 11 .
  • the moving second seat pan pulls the forward section 6 of the second portion 3 of the cushion 1 forward, causing the slits 5 in the extending section 4 to open, and the seat to extend.
  • Figures 2, 4, 5 and 8 show the seat in the extended position.
  • the seat can be retumed to the unextended position by rotating the adjustment knob 30 in the opposite direction, which reverses the process described above.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
EP99650045A 1998-06-04 1999-06-03 Ausziehbarer Sitz Withdrawn EP0962170A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA2239650 1998-06-04
CA 2239650 CA2239650A1 (en) 1998-06-04 1998-06-04 Extendable seat

Publications (2)

Publication Number Publication Date
EP0962170A2 true EP0962170A2 (de) 1999-12-08
EP0962170A3 EP0962170A3 (de) 2001-02-07

Family

ID=4162517

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99650045A Withdrawn EP0962170A3 (de) 1998-06-04 1999-06-03 Ausziehbarer Sitz

Country Status (2)

Country Link
EP (1) EP0962170A3 (de)
CA (2) CA2239650A1 (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10038413A1 (de) * 2000-08-07 2002-02-21 Dauphin Friedrich W Gmbh Stuhl mit einem in seiner Sitztiefe verstellbaren Sitz
DE10048898A1 (de) * 2000-10-02 2002-05-08 Stoll Sedus Ag Stuhl mit verstellbarer Sitztiefe
EP1413227A1 (de) * 2002-10-22 2004-04-28 Interstuhl Büromöbel GmbH & Co. KG Vorrichtung zur Verstellung der Sitztiefe eines Stuhls
DE102008004121A1 (de) * 2008-01-11 2009-07-16 Johnson Controls Gmbh Fahrzeugsitz mit einem sitztiefenverstellbaren Sitzteil und Verfahren zur Sitztiefenverstellung eines Fahrzeugsitzes
US7891740B2 (en) 2007-08-31 2011-02-22 Lear Corporation Composite vehicle seat frame
US8991921B2 (en) 2012-07-20 2015-03-31 Steelcase Inc. Seating unit with seat position and depth adjustment assembly
US9902293B2 (en) 2013-01-24 2018-02-27 Ford Global Technologies, Llc Independent cushion extension with optimized leg-splay angle
EP4056473A1 (de) * 2021-03-10 2022-09-14 B/E Aerospace, Inc. Komprimierbares kissen für einen flugzeugsitz
DE102021116551A1 (de) 2021-06-25 2022-12-29 Grammer Aktiengesellschaft Fahrzeugsitz mit Sitztiefenverstellung
DE102021124331A1 (de) 2021-09-21 2023-03-23 Bayerische Motoren Werke Aktiengesellschaft Sitzvorrichtung für ein Fahrzeug sowie Fahrzeug mit einer derartigen Sitzvorrichtung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4773703A (en) 1986-09-19 1988-09-27 Daimler-Benz Aktiengesellschaft Vehicle seat
US5370444A (en) 1992-09-11 1994-12-06 Sears Manufacturing Company Adjustable cushion

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4915447A (en) * 1989-03-13 1990-04-10 Sears Manufacturing Company Vehicle seat with adjustable thigh support

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4773703A (en) 1986-09-19 1988-09-27 Daimler-Benz Aktiengesellschaft Vehicle seat
US5370444A (en) 1992-09-11 1994-12-06 Sears Manufacturing Company Adjustable cushion

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10038413A1 (de) * 2000-08-07 2002-02-21 Dauphin Friedrich W Gmbh Stuhl mit einem in seiner Sitztiefe verstellbaren Sitz
DE10038414A1 (de) * 2000-08-07 2002-02-21 Dauphin Friedrich W Gmbh Stuhl mit einem in seiner Sitztiefe verstellbaren Sitz
DE10048898A1 (de) * 2000-10-02 2002-05-08 Stoll Sedus Ag Stuhl mit verstellbarer Sitztiefe
EP1413227A1 (de) * 2002-10-22 2004-04-28 Interstuhl Büromöbel GmbH & Co. KG Vorrichtung zur Verstellung der Sitztiefe eines Stuhls
DE10249335A1 (de) * 2002-10-22 2004-05-06 Interstuhl Büromöbel GmbH & Co. KG Vorrichtung zur Verstellung der Sitztiefe eines Stuhls
US7891740B2 (en) 2007-08-31 2011-02-22 Lear Corporation Composite vehicle seat frame
DE102008004121A1 (de) * 2008-01-11 2009-07-16 Johnson Controls Gmbh Fahrzeugsitz mit einem sitztiefenverstellbaren Sitzteil und Verfahren zur Sitztiefenverstellung eines Fahrzeugsitzes
DE102008004121B4 (de) * 2008-01-11 2011-04-14 Johnson Controls Gmbh Fahrzeugsitz mit einem sitztiefenverstellbaren Sitzteil und Verfahren zur Sitztiefenverstellung eines Fahrzeugsitzes
US8991921B2 (en) 2012-07-20 2015-03-31 Steelcase Inc. Seating unit with seat position and depth adjustment assembly
US9902293B2 (en) 2013-01-24 2018-02-27 Ford Global Technologies, Llc Independent cushion extension with optimized leg-splay angle
EP4056473A1 (de) * 2021-03-10 2022-09-14 B/E Aerospace, Inc. Komprimierbares kissen für einen flugzeugsitz
DE102021116551A1 (de) 2021-06-25 2022-12-29 Grammer Aktiengesellschaft Fahrzeugsitz mit Sitztiefenverstellung
DE102021124331A1 (de) 2021-09-21 2023-03-23 Bayerische Motoren Werke Aktiengesellschaft Sitzvorrichtung für ein Fahrzeug sowie Fahrzeug mit einer derartigen Sitzvorrichtung

Also Published As

Publication number Publication date
EP0962170A3 (de) 2001-02-07
CA2273709A1 (en) 1999-12-04
CA2239650A1 (en) 1999-12-04

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Inventor name: KEILHAUER, RON J.