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US4648651A Expired / Lapsed US ⏱️ 0.0 years remaining

Collapsible support with armrests

Assignee: Andrews Maclaren Ltd
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Filing: 1984-11-09
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Granted: 1987-03-10
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Expires: 2004-11-09
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Abstract

Abstract A collapsible, stick-folding, lie-back push-chair including seat support members having back rest members and armrest members, the inclination of the back rest members being controlled by connector members slidable along armrest members and having locking means in the form of a spring loaded pin for engagement with a hole in the armrest members. In the fully reclined position, the back rest members, and thus the seat, lie substantially parallel with the ground, at an angle of 165°-170° to the horizontal.

Inventors

  • 👤 Peter C. Hawkes

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 02:39
CPC Classifications
B; B62; B62B; B62B7/00; B62B7/04; B62B7/06; B62B7/08; B62B7/12; B62B7/123; B62B9/00; B62B9/10; B62B9/102; B62B9/104; B62B2205/00; B62B2205/02; B62B2205/06; B62B7/064

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 312 words
A collapsible support, for example a collapsible baby carriage, comprising: a rear frame having two upper corners and two lower corners; a base frame having two front corners and two rear corners pivotally connected, respectively, to the two lower corners of the rear frame; two upper brace members respectively pivoted, at their upper ends to the upper corners of the rear frame; two lower brace members respectively pivoted, at their lower ends, to the front corners of the base frame; two knuckle joints respectively connecting the two upper brace members to the two lower brace members so as to prevent folding of the rear frame towards the base frame when the support is extended with the upper brace members having a longitudinal axis extending substantially parallel with the lower brace members, but which allow the upper and lower brace members to fold, respectively, towards the rear corners of the base frame; two seat support members having rear ends pivotally supported, respectively, at or adjacent the rear corners of the base frame and having front ends respectively supported by the two lower brace members; two backrest members having lower ends respectively pivoted to the seat support members; two armrest members having rear ends pivotally connected to the rear frame at positions respectively above the rear ends of the two seat support members and having front ends which project beyond the lower brace members when the support is extended; two links having upper and lower ends respectively pivoted to the armrest members and the seat support members; two connector members respectively slidable on the backrest members and respectively slidable on the armrest members so as to allow adjustment of the inclination of the backrest members when the support is extended; and locking means for locking the connector members, on the respective armrests, so as to support the backrest members in at least one position.
Claim 2
Dependent Claim 312 words
A collapsible support, for example a collapsible baby carriage, comprising: a rear frame having two upper corners and two lower corners; a base frame having two front corners and two rear corners pivotally connected, respectively, to the two lower corners of the rear frame; two upper brace members respectively pivoted, at their upper ends to the upper corners of the rear frame; two lower brace members respectively pivoted, at their lower ends, to the front corners of the base frame; two knuckle joints respectively connecting the two upper brace members to the two lower brace members so as to prevent folding of the rear frame towards the base frame when the support is extended with the upper brace members having a longitudinal axis extending substantially parallel with the lower brace members, but which allow the upper and lower brace members to fold, respectively, towards the rear corners of the base frame; two seat support members having rear ends pivotally supported, respectively, at or adjacent the rear corners of the base frame and having front ends respectively supported by the two lower brace members; two backrest members having lower ends respectively pivoted to the seat support members; two armrest members having rear ends pivotally connected to the rear frame at positions respectively above the rear ends of the two seat support members and having front ends which project beyond the lower brace members when the support is extended; two links having upper and lower ends respectively pivoted to the armrest members and the seat support members; two connector members respectively slidable on the backrest members and respectively slidable on the armrest members so as to allow adjustment of the inclination of the backrest members when the support is extended; and locking means for locking the connector members, on the respective armrests, so as to support the backrest members in at least one position.
Claim 3
Dependent Claim 39 words
A collapsible support according to claim 1, in which the armrest members are respectively provided with hooks which, when the support is extended, respectively engage the lower brace members so as to provide lateral support for the armrest members.
Claim 4
Dependent Claim 23 words
A collapsible support according to claim 2, in which the lower brace members are respectively engaged between the armrest members and the hooks.
Claim 5
Dependent Claim 23 words
A collapsible support according to claim 1, in which the connector members each comprise a sleeve slidable longitudinally of an associated armrest members.
Claim 6
Dependent Claim 24 words
A collapsible support according to claim 4, in which the locking means comprise a spring-loaded pin cooperable with a hole associated with the arm-rest.
Claim 7
Dependent Claim 23 words
A collapsible support according to claim 5, in which the connector members each comprising an upstanding portion housing the pin and a spring.
Claim 8
Dependent Claim 20 words
A collapsible support according to claim 6, in which the hole is formed in a strap carried by the armrest.
Claim 9
Dependent Claim 18 words
A collapsible structure according to claim 5, in which the hole is one of a series of holes.
Claim 10
Dependent Claim 13 words
A collapsible structure according to claim 4, in which the sleeves are plastic.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1990-03-09 1990-09-08 1991-03-10 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1994-03-09 1994-09-08 1995-03-10 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1998-03-09 1998-09-08 1999-03-10 $7700.00 Window Closed / Lapsed

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