Patent US3712701A successfully refreshed from Google Patents.
Patent US3661274A successfully refreshed from Google Patents.
US3661274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle mounted hoist
Assignee: Individual
•
Filing: 1970-08-31
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Granted: 1972-05-09
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Expires: 1990-08-31
Abstract
Abstract A box frame reinforced by the walls of oil reservoirs has a prefabricated tubular core sleeve on which mast bearings are assembled in inherent alignment. The structure of the main and jib booms is such as to yield high ratio of strength in relation to weight and the tying of the hinge points of the boom and operating cylinder to each other as well as to the mast gives stability. A worm gear connected to the lower end of the mast provides for 360* rotation accommodated by swiveled hydraulic manifold connections. The stabilizer legs are not only strong per se but brace the hoist frame.
Inventors
- 👤 Frank G Woodside
- 👤 Richard F Uren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:52
CPC Classifications
B; B66; B66C; B66C13/00; B66C13/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
228 words
A hoist comprising a hoist frame, an upright mast rotatable with respect thereto, boom means extending laterally from the mast and supported thereon and a tube mounted on said frame and through which the mast extends, and means on the frame for positioning the tube, said mast being provided with bearings supporting it and providing for rotative movement, the tube having vertically spaced machined surfaces for the location of such bearings independently of the rest of the frame, the mast having a worm gear and the frame providing bearings in which there is mounted a worm meshing with said gear, said worm having means for operating it for free rotation of said mast and boom means and the frame includes means providing a vat for lubricant for the lubrication of the worm and worm gear aforesaid and the mast has means for adjustment of the worm gear axially of the mast for maintaining registration between the worm gear and worm and wherein said means for adjustment of the worm gear axially of the mast comprises a threaded aperture in said worm gear, a threaded lower end on said mast, a nut threaded on said mast, said nut having a through aperture registerable with said aperture in said worm gear, and a bolt extending through said aperture in said nut and threaded into said aperture in said worm gear.
Claim 2
Dependent Claim
228 words
A hoist comprising a hoist frame, an upright mast rotatable with respect thereto, boom means extending laterally from the mast and supported thereon and a tube mounted on said frame and through which the mast extends, and means on the frame for positioning the tube, said mast being provided with bearings supporting it and providing for rotative movement, the tube having vertically spaced machined surfaces for the location of such bearings independently of the rest of the frame, the mast having a worm gear and the frame providing bearings in which there is mounted a worm meshing with said gear, said worm having means for operating it for free rotation of said mast and boom means and the frame includes means providing a vat for lubricant for the lubrication of the worm and worm gear aforesaid and the mast has means for adjustment of the worm gear axially of the mast for maintaining registration between the worm gear and worm and wherein said means for adjustment of the worm gear axially of the mast comprises a threaded aperture in said worm gear, a threaded lower end on said mast, a nut threaded on said mast, said nut having a through aperture registerable with said aperture in said worm gear, and a bolt extending through said aperture in said nut and threaded into said aperture in said worm gear.
References Cited (Backward Citations)
US2588928A
Cited
US2712878A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |