US3665562A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hook having keyway at base of arcuate throat
Assignee: Individual
•
Filing: 1970-11-18
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Granted: 1972-05-30
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Expires: 1990-11-18
Abstract
Abstract This invention discloses a hook member having the combined features of a substantially arcuate throat to permit easy passage of chain therethrough and a keyway at the base of the throat for receipt of one link of a length of chain, to secure said chain against further passage through the hook.
Inventors
- 👤 Roger L Gower
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:53
CPC Classifications
B; B66; B66C; B66C1/00; B66C1/10; B66C1/22; B66C1/34; F; F16; F16G; F16G17/00; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/106; Y10S430/107; Y10T; Y10T24/00; Y10T24/39; Y10T24/3902; Y10T24/45; Y10T24/45225; Y10T24/45969
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
145 words
A hook having, in combination, an entrance opening leading to a partially arcuate throat permitting the slidable passage of a length of chain therethrough, said throat having one wall defining a straight line and being severed substantially in the central portion thereof and forming an angular meeting with the walls of said entrance opening; the walls of said opening being tapered to permit movement therepast of the links of chain adjacent the link inserted through said opening; and adjacent said throat, a slotted keyway having straight side walls for the receipt of a single link of common chain and an arcuate terminus of said keyway wherein said single link may be lockably retained while said chain is under tension, said side walls being tapered to accommodate the links of chain adjacent said link so retained in the keyway; and eye means integral with said hook.
Claim 2
Dependent Claim
145 words
A hook having, in combination, an entrance opening leading to a partially arcuate throat permitting the slidable passage of a length of chain therethrough, said throat having one wall defining a straight line and being severed substantially in the central portion thereof and forming an angular meeting with the walls of said entrance opening; the walls of said opening being tapered to permit movement therepast of the links of chain adjacent the link inserted through said opening; and adjacent said throat, a slotted keyway having straight side walls for the receipt of a single link of common chain and an arcuate terminus of said keyway wherein said single link may be lockably retained while said chain is under tension, said side walls being tapered to accommodate the links of chain adjacent said link so retained in the keyway; and eye means integral with said hook.
Claim 3
Dependent Claim
33 words
The invention of claim 1 wherein one wall of said keyway is adjacent the arcuate portion of said throat, and the severed straight-line wall is directly opposite said arcuate portion of said throat.
Claim 4
Dependent Claim
29 words
The invention of claim 1 wherein said keyway is in direct axial alignment with the walls of said entrance opening where the same meet the said severed straight-line wall.
Claim 5
Dependent Claim
16 words
The invention of claim 1 wherein the said opening is formed by two parallel straight walls.
Claim 6
Dependent Claim
11 words
The invention of claim 1 wherein said opening defines a turn.
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) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |