US3765648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Support apparatus
Assignee: Individual
•
Filing: 1971-09-07
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Granted: 1973-10-16
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Expires: 1991-09-07
Abstract
Abstract Elevating and leveling apparatus for campers and other transportable objects, one preferred apparatus embodiment including a plurality of telescoping legs, one of which is extended and retracted by power means. A cable is anchored to another telescoping leg and traverses stationary-axis pulleys so that the other leg extends and retracts concurrently with the one leg. In another presently preferred embodiment, a plurality of telescoping legs are mounted upon the transportable object and the extensible portion of each telescopic leg is provided with a pulley near the upper end and the fixed portion of each leg is provided with a pulley near the lower end. A cable traverses each pulley and extends between the legs so that when the cable is shortened or displaced out of its normal path, each of the legs will simultaneously extend to uniformly lift the transportable object. Conversely, when the length of the cable is increased or when the cable is allowed to resume its normal path, the legs will simultaneously retract. The method includes jointly extending or retracting telescoping legs by displacing a cable connecting the legs. Alternatively, the method includes power displacing one leg and causing simultaneous displacement of another leg through a connecting cable.
Inventors
- 👤 R Rasmussen
- 👤 C Rasmussen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:37
CPC Classifications
B; B66; B66F; B66F7/00; B66F7/02; B66F3/00; B66F3/46; B66F7/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
129 words
Apparatus for a transportable object having a primary supporting leg and at least one secondary supporting leg, each comprising a first and second member, the second member being longitudinally displaceable relative to the first comprising: power means acting downwardly upon the secondary member of the primary supporting legs to selectively extend the second member relative to the first; single connecting means connecting the second member of the primary supporting leg to the second member of the secondary supporting leg so that extension of the second member of the primary leg concurrently extends the second member of the secondary leg a corresponding distance; and means for selectively adjusting the location of the attachment of the connecting means to the second member of one of the primary and secondary supporting legs.
Claim 2
Dependent Claim
129 words
Apparatus for a transportable object having a primary supporting leg and at least one secondary supporting leg, each comprising a first and second member, the second member being longitudinally displaceable relative to the first comprising: power means acting downwardly upon the secondary member of the primary supporting legs to selectively extend the second member relative to the first; single connecting means connecting the second member of the primary supporting leg to the second member of the secondary supporting leg so that extension of the second member of the primary leg concurrently extends the second member of the secondary leg a corresponding distance; and means for selectively adjusting the location of the attachment of the connecting means to the second member of one of the primary and secondary supporting legs.
Claim 3
Dependent Claim
23 words
Apparatus as defined in claim 1 wherein said power means comprises a winch and pulley combination connected by cables to form a tackle.
Claim 4
Dependent Claim
19 words
Apparatus as defined in claim 1 wherein said power means comprises a hydraulic cylinder and an extendible hydraulic piston.
Claim 5
Dependent Claim
62 words
Apparatus as defined in claim 1 wherein said single connecting means comprises a cable which is (a) anchored to the top of the second member of the secondary leg and (b) movably supported at fixed locations on the first members of both the primary and secondary legs and (c) anchored to the second member of the primary leg near the bottom thereof.
Claim 6
Dependent Claim
31 words
Apparatus as defined in claim 4 further comprising means for receiving an anchoring fastener at any one of a plurality of vertical locations along the second member of the primary leg.
Claim 7
Dependent Claim
153 words
Apparatus for supporting on uneven terrain a transportable object having at least two supporting legs, each leg comprising a first and a second member, the second member being longitudinally extensible relative to the first, comprising: means accommodating a change of direction of a pulling force, at least one of said accommodating means being mounted on each of the first and second members of the supporting legs; a flexible line serially traversing the accommodating means of the first and second members of both of the supporting legs; means accommodating independent extensibility of the second member of each leg in response to displacement of the flexible line; and means for exerting a displacing force on the flexible line to urge extension of each second member relative to its corresponding first member, the extensibility of the one leg being greater than the other leg so as to maintain the object level when supported upon uneven terrain.
Claim 8
Dependent Claim
153 words
Apparatus for supporting on uneven terrain a transportable object having at least two supporting legs, each leg comprising a first and a second member, the second member being longitudinally extensible relative to the first, comprising: means accommodating a change of direction of a pulling force, at least one of said accommodating means being mounted on each of the first and second members of the supporting legs; a flexible line serially traversing the accommodating means of the first and second members of both of the supporting legs; means accommodating independent extensibility of the second member of each leg in response to displacement of the flexible line; and means for exerting a displacing force on the flexible line to urge extension of each second member relative to its corresponding first member, the extensibility of the one leg being greater than the other leg so as to maintain the object level when supported upon uneven terrain.
Claim 9
Dependent Claim
15 words
Apparatus as defined in claim 6 wherein said accommodating means comprises at least one pulley.
Claim 10
Dependent Claim
20 words
Apparatus as defined in claim 6 wherein said exerting means comprises a winch for varying the length of the line.
Claim 11
Dependent Claim
21 words
Apparatus as defined in claim 6 wherein said exerting means comprises means for displacing the line out of its normal path.
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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |