Patent US3947067A successfully refreshed from Google Patents.
US3947067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chair
Assignee: Stanzwerk Peitz und Co
•
Filing: 1973-11-05
•
Granted: 1976-03-30
•
Expires: 1993-11-05
Abstract
Abstract An adjustable easy chair with variable seat inclination and variable seat angle. The chair has a frame, a seat and a back, and a multiple-element linkage mounted to the frame on both sides of the seat and back. Each linkage has two rockers which extend downwardly from a first coupling member supporting the seat of the chair. The lower end portions of the rockers are articulated to a second coupling member which is oriented in approximately the same direction as the first coupling member. The rearward end portion of the second coupling member is articulated to the lower end portion of the rocker mounted to the frame and supporting the back, and the front end portion of the seat is articulated indirectly to the frame of the chair. The linkage is a four-element linkage having two rockers of unequal lengths, the front end portion of the first coupling member being supported on the frame by the four-element linkage. The point of connection of the first coupling member at the linkage is in the region of the point of connection of the longer of the rockers, and there is abutment means for limiting the pivot angle of the rockers at least in the rearward direction.
Inventors
- 👤 Hans-Joachim Griefahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:10
CPC Classifications
A; A47; A47C; A47C1/00; A47C1/02; A47C1/031; A47C1/034; A47C1/035; A47C1/0355
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
343 words
In an adjustable easy chair with variable seat inclination and variable seat angle, the chair having a frame, a seat and a backrest; a mechanism interconnecting the frame, the seat and the backrest and including, on both sides of the seat, a first coupling member extending forwardly from the backrest and supporting the seat of the chair and having rear and front portions; first and second rockers pivotally attached to the first coupling member adjacent the rear and the front portions thereof, respectively; the first and second rockers extending downwardly from the first coupling member; a second coupling member disposed below and extending generally in the same direction as the first coupling member and having a rear and a front portion; the first and second rockers being articulated to the second coupling member adjacent its rear and front portions, respectively; a third rocker on which the backrest is supported having a lower end portion at which it is pivoted to the rear portion of the second coupling member; the improvement in said mechanism, comprising in combination: a. connecting means for articulating said third rocker to said frame, said connecting means being attached to said third rocker at a distance from the articulation between said third rocker and said second coupling member; b. a third coupling member articulated to said front portion of said first coupling member; c. a fourth rocker articulated to said third coupling member and to said frame; d. a fifth rocker articulated to said third coupling member between the articulation of said third coupling member to said fourth rocker and to said first coupling member, said fifth rocker further being articulated to said frame and being longer than said fourth rocker; and e. abutment means for limiting the pivot angle of said fourth and fifth rockers at least in the rearward direction; whereby said first coupling member, together with said seat of the chair executes no rearward motion when said third rocker, together with said backrest is moved from a substantially upright, sitting position into a more inclined, television position.
Claim 2
Dependent Claim
343 words
In an adjustable easy chair with variable seat inclination and variable seat angle, the chair having a frame, a seat and a backrest; a mechanism interconnecting the frame, the seat and the backrest and including, on both sides of the seat, a first coupling member extending forwardly from the backrest and supporting the seat of the chair and having rear and front portions; first and second rockers pivotally attached to the first coupling member adjacent the rear and the front portions thereof, respectively; the first and second rockers extending downwardly from the first coupling member; a second coupling member disposed below and extending generally in the same direction as the first coupling member and having a rear and a front portion; the first and second rockers being articulated to the second coupling member adjacent its rear and front portions, respectively; a third rocker on which the backrest is supported having a lower end portion at which it is pivoted to the rear portion of the second coupling member; the improvement in said mechanism, comprising in combination: a. connecting means for articulating said third rocker to said frame, said connecting means being attached to said third rocker at a distance from the articulation between said third rocker and said second coupling member; b. a third coupling member articulated to said front portion of said first coupling member; c. a fourth rocker articulated to said third coupling member and to said frame; d. a fifth rocker articulated to said third coupling member between the articulation of said third coupling member to said fourth rocker and to said first coupling member, said fifth rocker further being articulated to said frame and being longer than said fourth rocker; and e. abutment means for limiting the pivot angle of said fourth and fifth rockers at least in the rearward direction; whereby said first coupling member, together with said seat of the chair executes no rearward motion when said third rocker, together with said backrest is moved from a substantially upright, sitting position into a more inclined, television position.
Claim 3
Dependent Claim
32 words
Adjustable easy chair as defined in claim 1, wherein said fifth rocker is adjacent the front edge of said seat and said fourth rocker is adjacent the rear edge of said seat.
Claim 4
Dependent Claim
29 words
Adjustable easy chair as defined in claim 1, said third coupling member being articulated to said first coupling member ahead of the point of connection of said fifth rocker.
Claim 5
Dependent Claim
36 words
Adjustable easy chair as defined in claim 1, wherein said third coupling member being, between its points of connection with said fourth and fifth rockers, shorter than said fifth rocker and longer than said fourth rocker.
Claim 6
Dependent Claim
40 words
Adjustable easy chair as defined in claim 1, wherein the distance between the points of connection at said frame for said fourth and fifth rockers is greater than the distance between their points of connection at said third coupling member.
Claim 7
Dependent Claim
42 words
Adjustable easy chair as defined in claim 1, further comprising a pull member for limiting the seat angle, one end portion of said pull member being mounted at said third rocker and the other end portion being mounted at said first rocker.
Claim 8
Dependent Claim
67 words
Adjustable easy chair as defined in claim 1, wherein the distance between the articulations of said third coupling member to said fourth and fifth rockers approximately equals the distance between the articulations of said third coupling member to said fifth rocker and said first coupling member; said third coupling member extending in the forward direction from said fourth rocker to the articulation with said first coupling member.
References Cited (Backward Citations)
US2859799A
Cited
US2994363A
Cited
DE1294616B
Cited
US3086814A
Cited
US3094353A
Cited
US3300243A
Cited
US3269769A
Cited
US3322459A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-30 | 1979-09-29 | 1980-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-30 | 1983-09-29 | 1984-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-30 | 1987-09-29 | 1988-03-30 | $7700.00 | Window Closed / Lapsed |