US3620563A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Locking link
Assignee: Individual
•
Filing: 1969-10-20
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Granted: 1971-11-16
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Expires: 1989-10-20
Abstract
Abstract A locking link structure is provided having a hooklike member at one end with an arcuate keeper located on the tang portion of the hook. The arcuate keeper is pivoted to the hook in such a manner so that as a link is placed within the hook, the arcuate member will be automatically turned into locking engagement so that the link will not slip out of the hook. A detent is provided having two positions one of which tends to hold the arcuate member open and the other which tends to hold the arcuate member closed. In a preferred embodiment, the opposite end of the link is provided with a distortable open ring structure whereby it can be permanently hooked to a chain or the like.
Inventors
- 👤 George W Pierce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:01
CPC Classifications
B; B66; B66C; B66C1/00; B66C1/10; B66C1/22; B66C1/34; B66C1/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
216 words
A safety hook having a shank and a tang which are approximately parallel with each other with a bight portion therebetween, comprising in combination: a. an arcuate member pivoted at about the center of said arcuate member and near the bottom end of said tang, displaced slightly from said bight, b. a bent-over end on one end of said arcuate member, c. a cutout portion on the inner surface at the end of said tang, said bent-over portion of the arcuate member fitting into said cutout portion, whereby the end of the arcuate member and the inner surface of said tang form a substantially smooth surface, d. said arcuate member being adapted to move into two positions, namely a first position wherein the arcuate member forms a smooth continuation with said tang and wherein the bottom surface of said arcuate member is displaced from said bight and a second position wherein one end of said arcuate member lies substantially in line with saiD bight and the opposite end of arcuate member substantially closes said hook, e. spring means at the pivot preventing easy movement of said arcuate member and a first detent tending to hold said arcuate member in said first position and a second detent tending to hold said arcuate member in said second position.
Claim 2
Dependent Claim
216 words
A safety hook having a shank and a tang which are approximately parallel with each other with a bight portion therebetween, comprising in combination: a. an arcuate member pivoted at about the center of said arcuate member and near the bottom end of said tang, displaced slightly from said bight, b. a bent-over end on one end of said arcuate member, c. a cutout portion on the inner surface at the end of said tang, said bent-over portion of the arcuate member fitting into said cutout portion, whereby the end of the arcuate member and the inner surface of said tang form a substantially smooth surface, d. said arcuate member being adapted to move into two positions, namely a first position wherein the arcuate member forms a smooth continuation with said tang and wherein the bottom surface of said arcuate member is displaced from said bight and a second position wherein one end of said arcuate member lies substantially in line with saiD bight and the opposite end of arcuate member substantially closes said hook, e. spring means at the pivot preventing easy movement of said arcuate member and a first detent tending to hold said arcuate member in said first position and a second detent tending to hold said arcuate member in said second position.
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) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |