Patent US4157811A successfully refreshed from Google Patents.
US4157811A
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
2026-10-29 23:44
CPC Classifications
B; B66; B66F; B66F19/00; B66F19/005
Claims Analysis
Total Claims: 11
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 ring including means for securing said ring to said manhole cover; (b) a lever which cooperates with said ring 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 ring including means for securing said ring to said manhole cover; (b) a lever which cooperates with said ring 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
19 words
An apparatus according to claim 1 wherein said lever has a hook on one end for engaging said ring.
Claim 4
Dependent Claim
40 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.
Claim 5
Dependent Claim
58 words
An apparatus according to claim 1 wherein said pivot means 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 6
Dependent Claim
29 words
An apparatus according to claim 4 further including a bearing mounted inside said tube and on said base so that said pivot member is prevented from contacting said base.
Claim 7
Dependent Claim
18 words
An apparatus according to claim 5 wherein said base includes studs on its lower surface to prevent slipping.
Claim 8
Dependent Claim
18 words
An apparatus according to claim 6 wherein said means adjacent said pivot member is a generally U-shaped saddle.
Claim 9
Dependent Claim
25 words
An apparatus according to claim 4 wherein said means for engagement with said lever for raising and lowering said manhole cover is a ball joint.
Claim 10
Dependent Claim
34 words
An apparatus according to claim 1 further including a stop means on said lever adapted to abut said ring for engaging said manhole cover so that said ring will not slide on said lever.
Claim 11
Dependent Claim
19 words
An apparatus according to claim 9 wherein said stop means is adjustable to a predetermined location on said lever.
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 |