Patent US3734220A successfully refreshed from Google Patents.
US3734220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-propelled platform tower having mechanical and hydraulic supporting means
Assignee: Individual
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Filing: 1972-01-07
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Granted: 1973-05-22
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Expires: 1992-01-07
Abstract
Abstract This invention relates to a deck or work platform of improved design supported so that it can be moved into a selected direction over the ground, both under water and on land. It may be used on the sea bottom, particularly at an offshore location and it may also be used on tundra, muskeg, swampy locations and the like. The improved tower of the present invention has combined mechanical and hydraulic support means and normally the hydraulic means would be used when moving the tower from one place to another while the mechanical support means would ordinarily be used after the tower was in a desired location.
Inventors
- 👤 R Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:00
CPC Classifications
E; E02; E02B; E02B17/00; E02B17/02; E02B17/021; E02B17/022; B; B62; B62D; B62D57/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
187 words
In a moveable platform comprising: a. a flat generally horizontal rectangular deck, b. a first set of four corner posts provided at each corner of said deck, c. each of said first corner posts including and supporting a movable ground engaging member therein, d. means for raising and lowering each movable ground engaging member (c) with respect to its supporting corner posts, e. a rectangular frame, f. means supporting said frame on said deck for movement selectively fore and aft, transversely and angularly to said deck, g. means for moving said frame selectively in each such direction, h. a second set of four corner posts provided at each corner of said frame, i. each of said second corner posts including and supporting a movable ground engaging member therein, j. means for raising and lowering each movable ground engaging member (i) with respect to its supporting corner posts, k. said means (j) for at least one of said sets of corner posts comprising a first system for extending and retracting each ground engaging member hydraulically and a second system for extending and retracting each ground engaging member mechanically.
Claim 2
Dependent Claim
187 words
In a moveable platform comprising: a. a flat generally horizontal rectangular deck, b. a first set of four corner posts provided at each corner of said deck, c. each of said first corner posts including and supporting a movable ground engaging member therein, d. means for raising and lowering each movable ground engaging member (c) with respect to its supporting corner posts, e. a rectangular frame, f. means supporting said frame on said deck for movement selectively fore and aft, transversely and angularly to said deck, g. means for moving said frame selectively in each such direction, h. a second set of four corner posts provided at each corner of said frame, i. each of said second corner posts including and supporting a movable ground engaging member therein, j. means for raising and lowering each movable ground engaging member (i) with respect to its supporting corner posts, k. said means (j) for at least one of said sets of corner posts comprising a first system for extending and retracting each ground engaging member hydraulically and a second system for extending and retracting each ground engaging member mechanically.
Claim 3
Dependent Claim
23 words
The structure of claim 1 wherein both the first and second sets of corner posts are provided with both mechanical and hydraulic systems.
Claim 4
Dependent Claim
72 words
The platform of claim 1 wherein each of the supporting corner posts includes the following structure: a. a cylinder mounted to move up and down in a keeper structure, b. a telescoping leg mounted to move up and down in said cylinder, c. hydraulic means adapted to move said leg up and down in said cylinder, and d. mechanical means adapted to move said cylinder up and down in said keeper structure.
Claim 5
Dependent Claim
50 words
The structure of claim 3 wherein said mechanical means includes: a. at least one rack mounted on the outside of said cylinder, b. a ring gear having an internal helical thread meshing with said rack, and c. means for turning said ring gear to move the cylinder up and down.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |