US4618184A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foldable chair frame
Assignee: Andrews Maclaren Ltd
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Filing: 1983-09-21
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Granted: 1986-10-21
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Expires: 2003-09-21
Abstract
Abstract Wire links (41) respectively pivoted at the junctions between the two back members (12) and the two upper brace members (14) of a collapsable lie-back push chair are formed, at their lower ends, with hooks 42 which are permanently connected to the seat back and releasably engagable with the two back members (12) and with the two upper brace members (14). To move the seat back between upright and lie-back positions it is merely necessary to release the hooks 42 from the supporting member and to swing the links 41 until the hooks 42 are engaged in the other of the support members.
Inventors
- 👤 Samuel E. Harvey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:51
CPC Classifications
B; B62; B62B; B62B7/00; B62B7/04; B62B7/06; B62B7/08; B62B7/12; B62B7/123; B62B2205/00; B62B2205/02; B62B7/004; B62B7/064; B62B9/00; B62B9/10; B62B9/102; B62B9/104
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
157 words
A flexible chair frame, comprising: two back members and two upper brace members, each back member being connected to a corresponding upper brace member at a junction; a seat back movable between an upright position attached to the upper brace members and a lie-back position attached to the back members; and support means for facilitating movement of the seat back into and out of its upright and lie-back positions, the support means comprising two links respectively pivoted at their upper ends to the junctions between the two back members and the two upper brace members and at their lower ends, formed with resiliently deformable hooks which are permanently engageable with the seat back and releasably engageable with the back members and with the upper brace members so that the support means is releasably engageable with the upper brace members and back members of the frame when the seat back is in its upright and lie-back positions, respectively.
Claim 2
Dependent Claim
157 words
A flexible chair frame, comprising: two back members and two upper brace members, each back member being connected to a corresponding upper brace member at a junction; a seat back movable between an upright position attached to the upper brace members and a lie-back position attached to the back members; and support means for facilitating movement of the seat back into and out of its upright and lie-back positions, the support means comprising two links respectively pivoted at their upper ends to the junctions between the two back members and the two upper brace members and at their lower ends, formed with resiliently deformable hooks which are permanently engageable with the seat back and releasably engageable with the back members and with the upper brace members so that the support means is releasably engageable with the upper brace members and back members of the frame when the seat back is in its upright and lie-back positions, respectively.
Claim 3
Dependent Claim
13 words
A foldable chair frame according to claim 1, wherein the frame includes wheels.
Claim 4
Dependent Claim
182 words
A flexible chair frame, comprising: a seat back movable when the frame is erected between an upright position attached to a forward part of the frame and a lie-back position attached to a rearward part of the frame; and support means for facilitating movement of the seat back into and out of its upright and lie-back positions, the support means being releasably engageable with the forward and rearward parts of the frame when the seat back is in the upright and lie-back positions, respectively, the support means being releasably engageable with two back members and with two upper brace members of the rearward and forward parts of the frame, respectively, when the seat back is in its lie-back and upright positions, respectively, the support means including two links respectively pivoted at their upper ends to the junctions between the two back members and the two upper brace members, and resiliently deformable hooks at the lower ends of the two links, the hooks being permanently engageable with the seat back and releasably engageable with the back members and with the upper brace members.
Claim 5
Dependent Claim
182 words
A flexible chair frame, comprising: a seat back movable when the frame is erected between an upright position attached to a forward part of the frame and a lie-back position attached to a rearward part of the frame; and support means for facilitating movement of the seat back into and out of its upright and lie-back positions, the support means being releasably engageable with the forward and rearward parts of the frame when the seat back is in the upright and lie-back positions, respectively, the support means being releasably engageable with two back members and with two upper brace members of the rearward and forward parts of the frame, respectively, when the seat back is in its lie-back and upright positions, respectively, the support means including two links respectively pivoted at their upper ends to the junctions between the two back members and the two upper brace members, and resiliently deformable hooks at the lower ends of the two links, the hooks being permanently engageable with the seat back and releasably engageable with the back members and with the upper brace members.
Claim 6
Dependent Claim
13 words
A foldable chair frame according to claim 3, wherein the frame includes wheels.
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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) | 1989-10-20 | 1990-04-21 | 1990-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-20 | 1994-04-21 | 1994-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-20 | 1998-04-21 | 1998-10-21 | $7700.00 | Window Closed / Lapsed |