Patent US1672331A successfully refreshed from Google Patents.
Patent US4250769A successfully refreshed from Google Patents.
US4250769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pivoted adjustable lever with grab link
Assignee: Individual
•
Filing: 1978-06-17
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Granted: 1981-02-17
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Expires: 1998-06-17
Abstract
Abstract An adjustable hand lever having a vertically adjustable tripod base, an adjustable fulcrum point and a grab link at the working end of the lever. The grab link accomodates and makes adjustable linked working chains.
Inventors
- 👤 Gerald E. Herring
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:10
CPC Classifications
B; B66; B66F; B66F15/00; A; A01; A01G; A01G17/00; A01G17/04; A01G17/14; A01G17/16; A01G23/00; A01G23/02; A01G23/06; A01G23/062; A01G23/065; E; E01; E01F; E01F9/00; E01F9/60; F; F16; F16H; F16H51/00; F16H51/02; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20582; Y10T74/20612; Y10T74/20624
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
106 words
A handoperated lifting apparatus comprising: (a) a lever having a working end and a handle with means for longitudinal adjustment of a pivot point; (b) a fulcrum having a tripod base with means for vertical adjustment of said pivot point; and (c) means for adjusting the length of a linked chain and securing the adjusted length of chain to said working end, wherein said means for adjusting the length of a linked chain is a U-shaped grab hook with an inner surface having a keyhole configuration which includes an oval upper portion and a vertical slot, said vertical slot adapted to receive a link of chain.
Claim 2
Dependent Claim
106 words
A handoperated lifting apparatus comprising: (a) a lever having a working end and a handle with means for longitudinal adjustment of a pivot point; (b) a fulcrum having a tripod base with means for vertical adjustment of said pivot point; and (c) means for adjusting the length of a linked chain and securing the adjusted length of chain to said working end, wherein said means for adjusting the length of a linked chain is a U-shaped grab hook with an inner surface having a keyhole configuration which includes an oval upper portion and a vertical slot, said vertical slot adapted to receive a link of chain.
Claim 3
Dependent Claim
21 words
The apparatus of claim 1, wherein said means for longitudinal adjustment is a plurality of longitudinally spaced holes in said lever.
Claim 4
Dependent Claim
41 words
The apparatus of claim 2, wherein said means for vertical adjustment comprises a first tubular primary leg of said tripod with at least one hole therethrough and a telescoping tubular pivot arm therein having a plurality of vertically spaced holes therein.
Claim 5
Dependent Claim
17 words
The apparatus of claim 3, wherein said primary leg is tilted about 5 degrees from the vertical.
Claim 6
Dependent Claim
16 words
The apparatus of claim 4, wherein said chain has means for attaching objects at one end.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-17 | 1984-08-18 | 1985-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-17 | 1988-08-18 | 1989-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-17 | 1992-08-18 | 1993-02-17 | $7700.00 | Window Closed / Lapsed |