Patent US4656998A successfully refreshed from Google Patents.
US3674301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hook and collar with gate
Assignee: AMERICA HOIST AND DERRICK CO
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Filing: 1971-01-07
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Granted: 1972-07-04
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Expires: 1991-01-07
Abstract
Abstract A load handling hook has a cylindrical shank and an integral hook body portion. This body portion includes an integral outward projection and an integral shoulder adjacent the shank. A collar is supported on the shoulder and around the shank and includes fingers which extend over the projection to prevent rotation of the collar. A safety gate includes a hub rotatably mounted around the shank and on the collar and also includes a bridging arm integral with the hub and situated to be rotatable with the hub between bridging and clearing relation with the throat of the hook. An outward extension of the hub provides a housing for a locking plunger which is spring biased to slide through an opening in the hub and into an opening in the collar to affix the hub in latching, rotation preventing relationship to the collar when the arm is in bridging relationship to the hook throat. The plunger is manually slidable against the spring action to unlatched relationship with the collar to allow rotation of the hub and arm.
Inventors
- 👤 Edward J Crook Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:56
CPC Classifications
B; B66; B66C; B66C1/00; B66C1/10; B66C1/22; B66C1/34; B66C1/36
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
280 words
An improved hook with a gate, said hook of the type having a shank, a body portion, a tip spaced from the shank thereby providing a throat opening, and a gate selectively movable between an open position clear of said throat and a closed bridging position across said throat opening, wherein the improvement includes: an interlocking collar disposed about said shank having a latching opening on its perimeter; means restraining said collar from rotation around said shank; said gate including a hub rotatably mounted with respect to said collar and a throat bridging arm integral with said hub; said hub having an enlarged extension portion; a latching assembly accommodated in the enlarged extension portIon of said hub; said latching assembly including a locking plunger slidably disposed in a bore in said enlarged portion of the hub, said bore being in alignment with said latching opening of the collar when the gate is in the closed, bridging position, said plunger being movable in said bore to engage and disengage said latching opening when the gate is in a closed position, and means for the manual manipulation of said plunger into and out of engagement with said slot; a compression spring disposed in said bore between the outer hub wall and the locking plunger to urge the locking plunger toward the interlocking collar; the perimeter of said collar also including a cylindrical portion and a ramping surface for slidably receiving the inner end of said plunger when said gate arm is not in latched condition; and said ramping surface being of configuration to move said plunger to position to engage said latching opening as said gate arm arrives at said closed position,
Claim 2
Dependent Claim
280 words
An improved hook with a gate, said hook of the type having a shank, a body portion, a tip spaced from the shank thereby providing a throat opening, and a gate selectively movable between an open position clear of said throat and a closed bridging position across said throat opening, wherein the improvement includes: an interlocking collar disposed about said shank having a latching opening on its perimeter; means restraining said collar from rotation around said shank; said gate including a hub rotatably mounted with respect to said collar and a throat bridging arm integral with said hub; said hub having an enlarged extension portion; a latching assembly accommodated in the enlarged extension portIon of said hub; said latching assembly including a locking plunger slidably disposed in a bore in said enlarged portion of the hub, said bore being in alignment with said latching opening of the collar when the gate is in the closed, bridging position, said plunger being movable in said bore to engage and disengage said latching opening when the gate is in a closed position, and means for the manual manipulation of said plunger into and out of engagement with said slot; a compression spring disposed in said bore between the outer hub wall and the locking plunger to urge the locking plunger toward the interlocking collar; the perimeter of said collar also including a cylindrical portion and a ramping surface for slidably receiving the inner end of said plunger when said gate arm is not in latched condition; and said ramping surface being of configuration to move said plunger to position to engage said latching opening as said gate arm arrives at said closed position,
Claim 3
Dependent Claim
34 words
The hook with gate of claim 1 including: resilient means connected between said collar and said gate disposed to bias the gate toward movement in a first angular direction with respect to said collar.
Claim 4
Dependent Claim
15 words
The hook with gate of claim 2 wherein said resilient means includes a torsion spring.
Claim 5
Dependent Claim
44 words
The hook with gate of claim 1 wherein said hook has an integral extension and said interlocking collar includes: a pair of integral depending spaced apart fingers adapted to straddle said extension of the hook thereby preventing rotation of the collar on the shank.
Claim 6
Dependent Claim
37 words
The hook with gate of claim 4 wherein said hook extension comprises: an integral projection adjacent the throat opening and in alignment with the tip, and wherein said hub extension is contiguous to the throat bridging arm.
Claim 7
Dependent Claim
34 words
The hook with gate of claim 4 wherein said hook extension comprises: an outwardly curved portion of the hook body portion near the shank and on a side of the hook opposite the throat.
Claim 8
Dependent Claim
160 words
An improved hook with a gate, said hook of the type having a shank, a body portion, a tip spaced from the shank thereby providing a throat opening, at least one integral, outwardly projecting extension, and a gate selectively movable between an open position clear of said throat and a closed bridging position across said throat opening, wherein the improvement includes: an interlocking collar slidably disposed about said shank; said collar having a pair of integral depending spaced apart fingers adapted to straddle said extension of the hook thereby preventing rotation of the collar on the shank; said gate including a hub slidably mounted on the shank and rotatably mounted with respect to said collar and a throat bridging arm integral with said hub; said hub having an enlarged extension portion; a latching assembly accommodated in the extension of said hub; and said latching assembly adapted to cooperate with said collar to releasably latch the gate in the closed position.
Claim 9
Dependent Claim
160 words
An improved hook with a gate, said hook of the type having a shank, a body portion, a tip spaced from the shank thereby providing a throat opening, at least one integral, outwardly projecting extension, and a gate selectively movable between an open position clear of said throat and a closed bridging position across said throat opening, wherein the improvement includes: an interlocking collar slidably disposed about said shank; said collar having a pair of integral depending spaced apart fingers adapted to straddle said extension of the hook thereby preventing rotation of the collar on the shank; said gate including a hub slidably mounted on the shank and rotatably mounted with respect to said collar and a throat bridging arm integral with said hub; said hub having an enlarged extension portion; a latching assembly accommodated in the extension of said hub; and said latching assembly adapted to cooperate with said collar to releasably latch the gate in the closed position.
Claim 10
Dependent Claim
104 words
The hook with gate of claim 7 wherein said collar has on its perimeter a radially aligned latch opening and said latch assembly includes: a locking plunger slidably disposed in a bore in said enlarged portion of the hub, said bore being in radial alignment relative to said collar and in alignment with said latching opening when the gate is in the closed, bridging position, said plunger being movable in said bore to engage and disengage said latching opening when the gate is in a closed position, and means for the manual manipulation of said plunger into and out of engagement with said slot.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |