Patent US5486395A successfully refreshed from Google Patents.
Patent US4309052A successfully refreshed from Google Patents.
US4309052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety hook
Assignee: FKI Industries Inc
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Filing: 1980-03-07
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Granted: 1982-01-05
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Expires: 2000-03-07
Abstract
Abstract A safety hook having a hook body and a safety latch rotatable to open and closed positions with respect to the hook body. An axlepin is fixed with respect to the latch and extends through and is rotatable with respect to portions of the hook body. The axlepin has locking surfaces adapted to engage a locking pawl whereby the latch may be locked against rotational movement with respect to the hook body.
Inventors
- 👤 Walker E. Drayton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:52
CPC Classifications
B; B66; B66C; B66C1/00; B66C1/10; B66C1/22; B66C1/34; B66C1/36; F; F16; F16B; F16B45/00; F16B45/02; F16B45/024; F16B45/027
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
184 words
A safety hook comprising a hook body having a bowl section, a bifurcated end defining two spaced ear portions, a latch extending between said spaced ear portions, and an axlepin extending through said ear portions and said latch to rotatably connect said latch with respect to said hook body whereby said latch may be moved to open and closed positions with respect to said hook body; the improvement comprising in that said axlepin is fixed with respect to said latch whereby relative movement between said latch and said axlepin is prevented, in that said axlepin has a locking surface thereon, in having a locking pawl adapted to engage said locking surface to lock said axlepin and latch against rotational movement with respect to said hook body, in having spring means for urging said locking pawl into engagement with said locking surface, and in that said locking pawl includes a finger actuation surface thereon positioned outside said bowl section and closely adjacent said axlepin whereby said pawl may be moved against said spring means to move said pawl out of engagement with said locking surface.
Claim 2
Dependent Claim
184 words
A safety hook comprising a hook body having a bowl section, a bifurcated end defining two spaced ear portions, a latch extending between said spaced ear portions, and an axlepin extending through said ear portions and said latch to rotatably connect said latch with respect to said hook body whereby said latch may be moved to open and closed positions with respect to said hook body; the improvement comprising in that said axlepin is fixed with respect to said latch whereby relative movement between said latch and said axlepin is prevented, in that said axlepin has a locking surface thereon, in having a locking pawl adapted to engage said locking surface to lock said axlepin and latch against rotational movement with respect to said hook body, in having spring means for urging said locking pawl into engagement with said locking surface, and in that said locking pawl includes a finger actuation surface thereon positioned outside said bowl section and closely adjacent said axlepin whereby said pawl may be moved against said spring means to move said pawl out of engagement with said locking surface.
Claim 3
Dependent Claim
26 words
A safety hook according to claim 1, the improvement further comprising in having a protective shroud portion on said hook body extending beyond said locking pawl.
Claim 4
Dependent Claim
86 words
A safety hook according to claim 1, the improvement further comprising in that said axlepin is barrel shaped, in that said locking surface comprises a slot in one end of said axlepin, in that said pawl comprises a T-shaped pin having a shank portion and a head portion with the head portion of said pin adapted to engage the slot in said axlepin and to engage a further slot in said hook body to lock said latch against rotational movement with respect to said hook body.
Claim 5
Dependent Claim
63 words
A safety hook according to claim 3, the improvement further comprising in that said shank portion of said T-shaped pin extends through said barrel shaped axlepin with said spring means surrounding said shank portion and bearing on a shoulder on said axlepin and a shoulder on said T-shaped pin to urge said head portion into the slot on the end of the axlepin.
Claim 6
Dependent Claim
74 words
A safety hook according to claim 4, the improvement further comprising in that the T-shaped pin has a push button on the end of said shank portion opposite said head portion whereby said pin may be moved against the force of said spring to move the head portion out of the slot in the end of said axlepin whereby said latch may be moved to an open position with respect to said hook body.
Claim 7
Dependent Claim
53 words
A safety hook according to claim 1, the improvement further comprising in that said pawl is rotatably mounted on a side of said hook body and wherein said spring engages a shoulder on said hook body and a shoulder on said pawl to urge said pawl into rotational engagement with said locking surface.
Claim 8
Dependent Claim
56 words
A safety hook according to claim 1, the improvement further comprising in that said pawl comprises a push button, a mounting pin on a side of said hook body on which said push button is slidably mounted and wherein said spring means urges said push button outwardly of said hook body to engage said locking surface.
Claim 9
Dependent Claim
40 words
A safety hook according to claim 1, the improvement further comprising in having a pawl mounting pin extending between the two spaced ear portions with said pawl being rotatably mounted on said mounting pin between the two spaced ear portions.
References Cited (Backward Citations)
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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) | 1985-01-04 | 1985-07-06 | 1986-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-04 | 1989-07-06 | 1990-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-04 | 1993-07-06 | 1994-01-05 | $7700.00 | Window Closed / Lapsed |