Patent NL57939C successfully refreshed from Google Patents.
Patent US4157809A successfully refreshed from Google Patents.
US4157809A
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 15:56
CPC Classifications
B; B66; B66F; B66F19/00; B66F19/005
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
116 words
An apparatus for raising and lowering a manhole cover, comprising: (a) means for engaging said manhole cover, comprising a pad, having a width W slightly less than a width W 1 of an opening near the center of said manhole cover, said pad having a lifting means secured near one edge, and said lifting means having a bushing slidably mounted thereon, said bushing having a width W 2 slightly less than said width W 1 of said opening in said manhole cover; (b) a lever which cooperates with said first named means for raising and lowering said manhole cover; and (c) means engageable with said lever for pivoting said manhole cover when in a raised position.
Claim 2
Independent Claim
116 words
An apparatus for raising and lowering a manhole cover, comprising: (a) means for engaging said manhole cover, comprising a pad, having a width W slightly less than a width W 1 of an opening near the center of said manhole cover, said pad having a lifting means secured near one edge, and said lifting means having a bushing slidably mounted thereon, said bushing having a width W 2 slightly less than said width W 1 of said opening in said manhole cover; (b) a lever which cooperates with said first named means for raising and lowering said manhole cover; and (c) means engageable with said lever for pivoting said manhole cover when in a raised position.
Claim 3
Dependent Claim
35 words
An apparatus according to claim 1 wherein said lifting means has a length L at least equal to a length L 1 of said pad plus two times a length L 2 of said bushing.
Claim 4
Dependent Claim
35 words
An apparatus according to claim 1 further including a stop means on said lever adapted to abut said means for engaging said manhole cover so that said engaging means will not slide on said lever.
Claim 5
Dependent Claim
19 words
An apparatus according to claim 3 wherein said stop means is adjustable to a predetermined location on said lever.
Claim 6
Dependent Claim
20 words
An apparatus according to claim 1 wherein said lever has a hook on one end for engaging said lifting means.
Claim 7
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 means for raising and lowering said manhole cover.
Claim 8
Dependent Claim
29 words
An apparatus according to claim 6 further including a bearing mounted inside said tube and on said base so that said pivot member is prevented from contacting said base.
Claim 9
Dependent Claim
18 words
An apparatus according to claim 6 wherein said base includes studs on its lower surface to prevent slipping.
Claim 10
Dependent Claim
18 words
An apparatus according to claim 6 wherein said means adjacent said pivot member is a generally U-shaped saddle.
Claim 11
Dependent Claim
46 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 top for engagement with said means for raising and lowering said manhole cover.
Claim 12
Dependent Claim
25 words
An apparatus according to claim 10 wherein said means for engagement with said means for raising and lowering said manhole cover is a ball joint.
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 |