US4347913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chair lift
Assignee: Individual
•
Filing: 1980-08-04
•
Granted: 1982-09-07
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Expires: 2000-08-04
Abstract
Abstract A portable chair lift for use by a hunter and the like for raising the person off the ground by means of a line extending over a limb. The device includes a frame member which has a seat hung downwardly therefrom on ropes. A worm gear assembly is carried by the frame member to which a hand operated crank is connected for rotating the worm. A pulley is carried on the same shaft as a gear forming part of the worm gear assembly and has a coiled length of web material provided therefrom. The rope is tied to the end of the web material. As a result of the worm gear, the chair lift can be raised with very little effort and the web material aids in stabilizing the chair. The entire chair is collapsible into a compact package for transporting from one site to another.
Inventors
- 👤 John A. Cromer, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:37
CPC Classifications
A; A01; A01M; A01M31/00; A01M31/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
132 words
A chair lift for use by a hunter and the like for raising a person off the ground by means of a line extending over a support member comprising: a substantially rectangular rigid frame member; a seat hung from said frame member; a gear assembly carried on top of said substantially rectangular rigid frame member; said gear assembly including, (i) a rotatable worm, (ii) a gear meshing with said worm, (iii) a shaft extending through said gear and being rotated therewith, (iv) a pulley carried by said shaft; a coil of line carried on said pulley; and a hand-operated crank arm connected to said worm and extending downwardly through said substantially rectangular rigid frame member adjacent said seat so that said crank can be manually rotated by an occupant of said seat.
Claim 2
Dependent Claim
132 words
A chair lift for use by a hunter and the like for raising a person off the ground by means of a line extending over a support member comprising: a substantially rectangular rigid frame member; a seat hung from said frame member; a gear assembly carried on top of said substantially rectangular rigid frame member; said gear assembly including, (i) a rotatable worm, (ii) a gear meshing with said worm, (iii) a shaft extending through said gear and being rotated therewith, (iv) a pulley carried by said shaft; a coil of line carried on said pulley; and a hand-operated crank arm connected to said worm and extending downwardly through said substantially rectangular rigid frame member adjacent said seat so that said crank can be manually rotated by an occupant of said seat.
Claim 3
Dependent Claim
207 words
A chair lift for use by a hunter and the like for raising a person off the ground by means of a line extending over a support member comprising: a frame member; a seat hung from said frame member; a gear assembly carried by said frame; said gear assembly including, (i) a rotatable worm, (ii) a gear meshing with said worm, (iii) a shaft extending through said gear and being rotated therewith, (iv) a pulley carried by said shaft, a coil of line carried on said pulley; and a hand-operated crank arm connected to said worm and extending downwardly therefrom adjacent said seat so that said crank can be manually rotated by an occupant of said seat, said seat including, (i) a rectangular rigid frame supported on an angle with an upper end supported vertically above a lower end, (ii) a canvas support sheet extending between said upper end of said frame and said lower end, (iii) a rigid base carried by said support sheet providing a substantially horizontal base upon which an occupant of said chair lift sits, and said seat being collapsible against said frame member producing a compact package so that a person can readily carry said chair lift from one location to another.
Claim 4
Dependent Claim
207 words
A chair lift for use by a hunter and the like for raising a person off the ground by means of a line extending over a support member comprising: a frame member; a seat hung from said frame member; a gear assembly carried by said frame; said gear assembly including, (i) a rotatable worm, (ii) a gear meshing with said worm, (iii) a shaft extending through said gear and being rotated therewith, (iv) a pulley carried by said shaft, a coil of line carried on said pulley; and a hand-operated crank arm connected to said worm and extending downwardly therefrom adjacent said seat so that said crank can be manually rotated by an occupant of said seat, said seat including, (i) a rectangular rigid frame supported on an angle with an upper end supported vertically above a lower end, (ii) a canvas support sheet extending between said upper end of said frame and said lower end, (iii) a rigid base carried by said support sheet providing a substantially horizontal base upon which an occupant of said chair lift sits, and said seat being collapsible against said frame member producing a compact package so that a person can readily carry said chair lift from one location to another.
Claim 5
Dependent Claim
68 words
The chair lift as set forth in claim 1 further comprising: said coil of line including; (i) a coil of flat web material of sufficient length to extend from said pulley over said support member, and (ii) a length of rope connected to a free end of said web material, whereby said web material when extending over said support member aids in stabilizing said chair lift against rotation.
Claim 6
Dependent Claim
47 words
The chair lift as set forth in claim 1 further comprising: one end of said crank arm being pivotally connected to said worm gear; a clamping member carried by said frame member for holding said crank arm laterally out from said frame member when not in use.
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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) | 1985-09-06 | 1986-03-08 | 1986-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-06 | 1990-03-08 | 1990-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-06 | 1994-03-08 | 1994-09-07 | $7700.00 | Window Closed / Lapsed |