Patent US4718716A successfully refreshed from Google Patents.
US4718716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reclining chair
Assignee: MillerKnoll Inc
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Filing: 1986-12-03
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Granted: 1988-01-12
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Expires: 2006-12-03
Abstract
Abstract A reclining chair (10) having a seat (12), backrest (14), side supports (16) and a reclining mechanism which includes a backrest bracket (34) rigidly affixed to the backrest (14) and pivotably mounted to a side support bracket (18), the side support bracket (18) being rigidly affixed to a side support (16). A seat support bracket (30) is rigidly affixed to the seat (12) and pivotably mounted to a side support bracket (18). A coupler link (40) has one end pivotably connected to the backrest bracket (34) and a second end pivotably connected to the seat support bracket (30). The axis of rotation of the backrest (14) is located so as to pass approximately through the hips of a chair occupant. Further, the linkages are so selected and arranged that the reclining motion and return motion take place by a horizontal translation of the center of gravity of the occupant to minimize the effort required to operate the reclining mechanism through its range of movement.
Inventors
- 👤 William E. Stumpf
- 👤 Donald T. Chadwick
- 👤 Bruce R. Gezon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:35
CPC Classifications
A; A47; A47C; A47C1/00; A47C1/02; A47C1/031; A47C1/034; A47C1/0342; A47C1/0345; A47C1/036
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
197 words
In reclining chair having a seat, backrest, and side supports, means mounting the seat and backrest to the side supports so that the backrest reclines with respect to the seat, the improvement in the mounting means comprises: a backrest bracket rigidly affixed to said backrest for supporting said backrest; side support brackets rigidly affixed to said side supports and pivotably mounting said backrest bracket; a seat support bracket rigidly affixed to said seat and pivotably mounted to said side support brackets for pivotably supporting said seat on said side support brackets; and a coupler link having one end pivotably mounted to said backrest bracket and having a second end pivotably mounted to said seat support bracket for coordinating movement of said seat with said backrest; the backrest bracket, the side support brackets, the seat bracket and the coupler link being so configured and arranged that an axis of rotation of said backrest with respect to said seat passes approximately through the hips of a chair occupant and so that the center of gravity of the chair occupant will be translated substantially horizontally upon rotation of said backrest with respect to said seat about said axis of rotation.
Claim 2
Dependent Claim
197 words
In reclining chair having a seat, backrest, and side supports, means mounting the seat and backrest to the side supports so that the backrest reclines with respect to the seat, the improvement in the mounting means comprises: a backrest bracket rigidly affixed to said backrest for supporting said backrest; side support brackets rigidly affixed to said side supports and pivotably mounting said backrest bracket; a seat support bracket rigidly affixed to said seat and pivotably mounted to said side support brackets for pivotably supporting said seat on said side support brackets; and a coupler link having one end pivotably mounted to said backrest bracket and having a second end pivotably mounted to said seat support bracket for coordinating movement of said seat with said backrest; the backrest bracket, the side support brackets, the seat bracket and the coupler link being so configured and arranged that an axis of rotation of said backrest with respect to said seat passes approximately through the hips of a chair occupant and so that the center of gravity of the chair occupant will be translated substantially horizontally upon rotation of said backrest with respect to said seat about said axis of rotation.
Claim 3
Dependent Claim
34 words
A reclining chair according to claim 1 and further comprising a headrest adapted to be moveable between a first position adjacent to said backrest and a second position forward and inclined from said backrest.
Claim 4
Dependent Claim
122 words
A reclining chair according to claim 2 wherein said headrest mechanism comprises: a vertical plate at a rear portion of said headrest; a ramp surface integral to said headrest for controlling movement of said headrest between a first position and a second, inclined position; a guide link pivotably mounted at an upper end thereof to said headrest and having a slot at a lower end thereof and being adapted to connect said headrest to said backrest; a cam having a ramp surface corresponding to said ramp surface integral to said headrest and having a slot at an upper portion thereof to engage said vertical plate; and a pin engaging said slot in said guide link to connect said link to said cam.
Claim 5
Dependent Claim
49 words
A reclining chair according to claim 1 and further comprising a leg rest and means mounting said leg rest to said seat support bracket to extend said leg rest forwardly and upwardly from a vertical, stored position beneath a front portion of said seat to a horizontal leg-supporting position.
Claim 6
Dependent Claim
40 words
A reclining chair according to claim 4 wherein said leg rest mounting means comprises a track and means to slidably mount said leg rest to said track to extend said leg rest with respect to said leg rest mounting means.
Claim 7
Dependent Claim
32 words
A reclining chair according to claim 1 and further comprising a release mechanism adapted to releasably secure said backrest and said seat in any one of a number of relative reclining positions.
Claim 8
Dependent Claim
94 words
A reclining chair according to claim 6 wherein said release mechanism comprises: a plurality of teeth integral with and protruding from a forward portion of said seat support bracket in an arc-like configuration; a release arm pivotably mounted to said side support and containing a tooth-like projection adapted to engage the teeth on the forward portion of said seat support bracket; and a handle secured to said release arm to allow said tooth-like projection to be disengaged from the teeth on said seat support bracket to allow movement of said reclining chair between positions.
Claim 9
Dependent Claim
85 words
A reclining chair according to claim 1 wherein said coupler link comprises an elongated link having a forward end pivotably mounted to an upper portion of said seat support bracket and further having a rear end pivotably mounted to a rear portion of said backrest bracket; said seat support bracket having a central portion thereof pivotably mounted to a lower portion of said side support bracket; and said backrest bracket having a forward portion thereof pivotably mounted to an upper portion of said support bracket.
Claim 10
Dependent Claim
29 words
A reclining chair according to claim 8 wherein reclining movement of said backrest bracket causes said coupler link to initiate forward and upward rotation of said seat support bracket.
Claim 11
Dependent Claim
72 words
A reclining chair according to claim 9 and further comprising a leg rest, means mounting said leg rest to said seat support bracket for movement forwardly and upwardly from a stored, vertical position to a horizontal, leg-supporting position, and vice versa; and means coupled between said backrest bracket and said leg rest mounting means to synchronize the reclining movement of said backrest with the forward and upward movement of said leg rest.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-01-11 | 1991-07-13 | 1992-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-11 | 1995-07-13 | 1996-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-11 | 1999-07-13 | 2000-01-12 | $7700.00 | Window Closed / Lapsed |