US4836501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structure leveling device
Assignee: Individual
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Filing: 1988-07-05
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Granted: 1989-06-06
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Expires: 2008-07-05
Abstract
Abstract A structure leveling device designed primarily to be utilized for recreational vehicles which is constructed of an integral plastic member having an upper surface which is divided into a plurality of levels of different heights. This structure leveling device is constructed in a manner to safely support the weight of a vehicle. Also, the device is constructed to facilitate movement of a vehicle wheel onto the different levels. Also, the upper surface of each of the levels includes a roughened anti-skid surface.
Inventors
- 👤 William F. Baer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:19
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/42; E06C7/44; B; B66; B66F; B66F7/00; B66F7/24; B66F7/243
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
225 words
A structure leveling device comprising: an integral plastic member having a bottom surface and an upper surface, said bottom surface to rest on a supporting surface, said upper surface being divided into a plurality of levels of different heights, a portion of said structure being adapted to rest on one of said levels, said integral plastic member being hollow and formed of sheet material, said integral plastic member having side walls, said side walls being formed into a continuous corrugated configuration thereby enhancing the overall compressive strength characteristic of said structure leveling device, said corrugated configuration defining a plurality of grooves, all of said grooves being of the same size in transverse cross-section; said hollow forming an internal chamber, a cross-brace arrangement formed within said internal chamber to also enhance the overall compressive strength characteristic of said structure leveling device; and said integral plastic member having a front edge and a rear edge, said rear edge being greater in height than said front edge, locking means located directly adjacent said rear edge, said locking means being adapted to interconnect with a separate attachment providing a still further level of a different height, said locking means comprising a pair of said grooves with one of said groove being formed within one said side wall and the other said groove formed within the opposite said side wall.
Claim 2
Dependent Claim
225 words
A structure leveling device comprising: an integral plastic member having a bottom surface and an upper surface, said bottom surface to rest on a supporting surface, said upper surface being divided into a plurality of levels of different heights, a portion of said structure being adapted to rest on one of said levels, said integral plastic member being hollow and formed of sheet material, said integral plastic member having side walls, said side walls being formed into a continuous corrugated configuration thereby enhancing the overall compressive strength characteristic of said structure leveling device, said corrugated configuration defining a plurality of grooves, all of said grooves being of the same size in transverse cross-section; said hollow forming an internal chamber, a cross-brace arrangement formed within said internal chamber to also enhance the overall compressive strength characteristic of said structure leveling device; and said integral plastic member having a front edge and a rear edge, said rear edge being greater in height than said front edge, locking means located directly adjacent said rear edge, said locking means being adapted to interconnect with a separate attachment providing a still further level of a different height, said locking means comprising a pair of said grooves with one of said groove being formed within one said side wall and the other said groove formed within the opposite said side wall.
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) | 1992-06-05 | 1992-12-05 | 1993-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-05 | 1996-12-05 | 1997-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-05 | 2000-12-05 | 2001-06-06 | $7700.00 | Window Closed / Lapsed |