Patent US3863441A successfully refreshed from Google Patents.
US3863441A
Expired / Lapsed
US
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Shortening hook
Assignee: Individual
•
Filing: 1973-06-21
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Granted: 1975-02-04
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Expires: 1993-06-21
Abstract
Abstract A chain link hook with an angularly disposed mouth for receiving a chain link of a plurality of connected links, the hook having a groove supporting substantially the whole length of the bottom portion of the inserted link, said hook also having guide troughs for the connected links on each side of the inserted link.
Inventors
- 👤 Hans Kaufmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:11
CPC Classifications
F; F16; F16G; F16G17/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
126 words
A shortening hook for round link chains having a plurality of connected links, said hook having an insertion slot formed by lateral supporting surfaces extending essentially parallel to each other to prevent tilting of an inserted chain link therein, said hook including a transverse yoke arranged in the region of the bottom of the hook slot and having projections which extend between the legs of the chain links following the chain link introduced into the shortening hook, the transverse yoke being developed as a supporting yoke and a centering trough providing a snug seat in the bottom of said slot for the inserted chain link and supporting the longitudinal leg of said link which faces the bottom of the insertion slot over practically its entire length.
Claim 2
Dependent Claim
126 words
A shortening hook for round link chains having a plurality of connected links, said hook having an insertion slot formed by lateral supporting surfaces extending essentially parallel to each other to prevent tilting of an inserted chain link therein, said hook including a transverse yoke arranged in the region of the bottom of the hook slot and having projections which extend between the legs of the chain links following the chain link introduced into the shortening hook, the transverse yoke being developed as a supporting yoke and a centering trough providing a snug seat in the bottom of said slot for the inserted chain link and supporting the longitudinal leg of said link which faces the bottom of the insertion slot over practically its entire length.
Claim 3
Dependent Claim
49 words
A shortening hook according to claim 1, characterized by the fact that in the region of the ends of the supporting yoke, there are guide troughs for the chain links connected with the inserted chain link and for the chain links following said links connected to said inserted link.
Claim 4
Dependent Claim
49 words
A shortening hook according to claim 1, characterized by the fact that in the region of the ends of the supporting yoke, there are guide troughs for the chain links connected with the inserted chain link and for the chain links following said links connected to said inserted link.
Claim 5
Dependent Claim
91 words
A shortEning hook according to claim 3, characterized by the fact that the insertion slot has a mouth part extending obliquely to the longitudinal axis of the hook and a guide part for the inserted chain link extending in the longitudinal direction of the hook, and that the vertex line of the guide troughs for the chain links following the chain links next to the inserted link lie in the same plane as that in which the longitudinal legs of the inserted chain link are also held by the guide part.
Claim 6
Dependent Claim
45 words
A shortening hook according to claim 1, characterized in that it is formed near the projections of the supporting yoke with locating concavities which support the next links directly following the link inserted in the hook slot, as well as the next links after that.
Claim 7
Dependent Claim
71 words
A shortening hook according to claim 5 characterized in that the slot of the hook comprises an entry portion which is inclined to the longitudinal axis of the hook, the line of symmetry of the locating concavities for the links following the links which are directly attached to the link in the slot being contained in the same plane which also contains the sides of the link held in the slot.
References Cited (Backward Citations)
US3741599A
Cited
US3673646A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |