Patent US3794283A successfully refreshed from Google Patents.
US3794283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extensible frame
Assignee: Individual
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Filing: 1972-12-19
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Granted: 1974-02-26
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Expires: 1992-12-19
Abstract
Abstract An extensible frame having a pair of rigid end members disposed on a common axis and three articulated arms extending between the members in intersecting planes containing the common axis and hinged to the members in a manner which relative translational movement of the members toward and away from one another along the common axis and restrains the member against all other relative movement. The frame is capable of various uses such as supporting an object for horizontal or vertical movement, an adjustable instrument support, an erectable frame for a building structure, and others.
Inventors
- 👤 H Furno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:06
CPC Classifications
B; B27; B27B; B27B5/00; B27B5/16; B27B5/18; B27B5/188; B23; B23Q; B23Q1/00; B23Q1/25; B23Q1/44; B23Q1/50; B23Q1/54; B23Q1/5468; B23Q1/5481; F; F16; F16H; F16H21/00; F16H21/04; F16M; F16M11/00; F16M11/02; F16M11/04; F16M11/043; F16M11/046; F16M11/20; F16M11/24; F16M11/38; F16M13/00; F16M13/02; F16M2200/00; F16M2200/02; F16M2200/021; F16M2200/022; F16M2200/04; F16M2200/047; F16M2200/06; F16M2200/063; F16M2200/066
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
371 words
An extensible frame comprising: a pair of rigid parallel end plates movable toward and away from one another along an axis normal to said plates, said plates having inner sides facing one another, three articulated arms extending between said plates with the longitudinal centerlines of said arms located in intersecting planes, respectively, containing said axis, each arm including a pair of relatively wide links projecting edgewise a substantial distance beyond either side of the respective arm plane and having adjacent ends and opposite ends, and central hinge means pivotally joining the adjacent link ends on a hinge axis normal to the respective arm plane, end hinge means pivotally joining the opposite ends of the links of each arm to the adjacent end plates on hinge axes normal to the respective arm plane, the hinge axes of said central hinge means being disposed in a common plane normal to said given axis, the hinge axes of the end hinge means at each end of said arms being disposed in a common plane normal to said given axis, each hinge means comprising a pair of relatively widely spaced hinges located at opposite sides of the respective arm plane adjacent the side edges of the respective arm links and having a common hinge axis, each hinge of each end hinge means comprising a pair of spaced tongues projecting from the inner side of the respective plate, a tongue on the end of the respective arm link positioned between and in sliding contact with said plate tongues, and a pivot pin extending through said tongues, and each hinge of each central hinge means comprising a pair of spaced tongues on one respective arm link, a tongue on the other respective arm link positioned between and in sliding contact with said spaced link tongues, and a pin extending through said link tongues whereby said arms accommodate movement of said plates toward and away from one another along said given axis in a manner such that said plates are restrained against all relative movement with respect to one another except translational movement along said given axis, said frame being collapsible to a generally flat configuration wherein said plates and said links of each arm abut one another.
Claim 2
Dependent Claim
371 words
An extensible frame comprising: a pair of rigid parallel end plates movable toward and away from one another along an axis normal to said plates, said plates having inner sides facing one another, three articulated arms extending between said plates with the longitudinal centerlines of said arms located in intersecting planes, respectively, containing said axis, each arm including a pair of relatively wide links projecting edgewise a substantial distance beyond either side of the respective arm plane and having adjacent ends and opposite ends, and central hinge means pivotally joining the adjacent link ends on a hinge axis normal to the respective arm plane, end hinge means pivotally joining the opposite ends of the links of each arm to the adjacent end plates on hinge axes normal to the respective arm plane, the hinge axes of said central hinge means being disposed in a common plane normal to said given axis, the hinge axes of the end hinge means at each end of said arms being disposed in a common plane normal to said given axis, each hinge means comprising a pair of relatively widely spaced hinges located at opposite sides of the respective arm plane adjacent the side edges of the respective arm links and having a common hinge axis, each hinge of each end hinge means comprising a pair of spaced tongues projecting from the inner side of the respective plate, a tongue on the end of the respective arm link positioned between and in sliding contact with said plate tongues, and a pivot pin extending through said tongues, and each hinge of each central hinge means comprising a pair of spaced tongues on one respective arm link, a tongue on the other respective arm link positioned between and in sliding contact with said spaced link tongues, and a pin extending through said link tongues whereby said arms accommodate movement of said plates toward and away from one another along said given axis in a manner such that said plates are restrained against all relative movement with respect to one another except translational movement along said given axis, said frame being collapsible to a generally flat configuration wherein said plates and said links of each arm abut one another.
Claim 3
Dependent Claim
27 words
A frame according to claim 1 wherein: said end members comprise parallel plates which remain parallel throughout the range of their relative movement along said given axis.
Claim 4
Dependent Claim
31 words
A frame according to claim 1 wherein: said links have a uniform length between their respective hinge axes, whereby said end members are movable toward and into contact with one another.
Claim 5
Dependent Claim
32 words
A frame according to claim 1 wherein: one end member comprises a relatively stationary base and the other end member comprises a relatively movable support movable toward and away from said base.
Claim 6
Dependent Claim
23 words
A frame according to claim 4 wherein: said base is mounted in a fixed generally horizontal position, whereby said support is vertically movable.
Claim 7
Dependent Claim
23 words
A frame according to claim 4 wherein: said base is mounted in a fixed generally vertical position, whereby said support is movable horizontally.
Claim 8
Dependent Claim
42 words
A frame according to claim 1 wherein: each of said arm links comprises a relatively broad frame, and the link frames of each arm are hinged to one another and to said end members adjacent the longitudinal edges of the link frames.
Claim 9
Dependent Claim
73 words
A frame according to claim 1 wherein: said end members comprise parallel plates which remain parallel throughout the range of their relative movement along said given axis, said links have a uniform length between their respective hinge axes, whereby said plates are movable toward and into contact with one another, one plate comprises a relatively stationary base and the other plate comprises a relatively movable support movable toward and away from said base.
Claim 10
Dependent Claim
23 words
A frame according to claim 8 wherein: said base is mounted in a fixed generally horizontal position, whereby said support is vertically movable.
Claim 11
Dependent Claim
23 words
A frame according to claim 8 wherein: said base is mounted in a fixed generally vertical position, whereby said support is movable horizontally.
Claim 12
Dependent Claim
31 words
A frame according to claim 1 including: a fixed support mounting one frame end member for extension and retraction of the other end member toward and away from said fixed support.
Claim 13
Dependent Claim
21 words
A frame according to claim 11 wherein: said fixed support is a vertical wall, whereby said frame extends and retracts horizontally.
Claim 14
Dependent Claim
27 words
A frame according to claim 11 including: a tool such as a saw mounted on said movable end member for movement toward and away from said wall.
Claim 15
Dependent Claim
20 words
A frame according to claim 11 wherein: said fixed support is horizontal, such that said frame extends and retracts vertically.
Claim 16
Dependent Claim
30 words
A frame according to claim 14 wherein: said fixed support is a work table, and a tool supported on said movable end member for vertical adjustment relative to said table.
Claim 17
Dependent Claim
31 words
A frame according to claim 14 wherein: said fixed support is a concrete foundation, and hydraulic jack secured to the underside of said movable end member for elevating the latter member.
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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) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |