Patent US4157810A successfully refreshed from Google Patents.
US4157810A
Expired / Lapsed
US
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Apparatus for lifting a manhole cover
Assignee: DIVERSIFIED PRODUCTS & ENGINEERING Inc 4727 LOLLY DR MONROEVILLE PA 15146 A PA CORP
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Filing: 1978-02-27
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Granted: 1979-06-12
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Expires: 1998-02-27
Abstract
Abstract An apparatus is disclosed for lifting a manhole cover which comprises: (1) a means for engaging the manhole cover which cooperates with a lever means for raising and lowering the cover, and (2) a pivot means which also cooperates with the lever means to pivot the cover to the desired position.
Inventors
- 👤 George S. Haller
- 👤 Theodore C. Uphoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:51
CPC Classifications
B; B66; B66F; B66F19/00; B66F19/005
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
70 words
An apparatus for raising, pivoting in a plane parallel to the ground and lowering a manhole cover, comprising: (a) a balljoint including means for securing said balljoint to said manhole cover; (b) a lever which cooperates with said balljoint for raising and lowering said manhole cover; and (c) means engageable with said lever for pivoting said manhole cover, in a plane parallel to the ground, when in a raised position.
Claim 2
Independent Claim
70 words
An apparatus for raising, pivoting in a plane parallel to the ground and lowering a manhole cover, comprising: (a) a balljoint including means for securing said balljoint to said manhole cover; (b) a lever which cooperates with said balljoint for raising and lowering said manhole cover; and (c) means engageable with said lever for pivoting said manhole cover, in a plane parallel to the ground, when in a raised position.
Claim 3
Dependent Claim
62 words
An apparatus according to claim 1 wherein said means for pivoting said manhole cover includes: (a) a base; (b) a cylindrical tube mounted on said base; (c) a cylindrical pivot member mounted for pivotal movement inside said cylindrical tube; and (d) means secured to said pivot member adjacent its top for engagement with said lever for raising and lowering said manhole cover.
Claim 4
Dependent Claim
29 words
An apparatus according to claim 2 further including a bearing mounted inside said tube and on said base so that said pivot member is prevented from contacting said base.
Claim 5
Dependent Claim
18 words
An apparatus according to claim 3 wherein said base includes studs on its lower surface to prevent slipping.
Claim 6
Dependent Claim
18 words
An apparatus according to claim 2 wherein said means adjacent said pivot member is a generally U-shaped saddle.
Claim 7
Dependent Claim
48 words
An apparatus according to claim 1 wherein said means for pivoting said manhole cover includes: (a) a base; (b) a support mounted on said base; and (c) means secured to said support adjacent its top for engagement with said lever means for raising and lower said manhole cover.
Claim 8
Dependent Claim
24 words
An apparatus according to claim 6 wherein said means for engagement with said lever for raising and lowering said manhole cover is a balljoint.
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) | 1982-06-11 | 1982-12-11 | 1983-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-06-11 | 1986-12-11 | 1987-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-06-11 | 1990-12-11 | 1991-06-12 | $7700.00 | Window Closed / Lapsed |