US3718362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hoist apparatus
Assignee: Individual
•
Filing: 1970-05-26
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Granted: 1973-02-27
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Expires: 1990-05-26
Abstract
Abstract INVENTION RELATES TO A LIFT HOIST INCLUDING AUTOMATICALLY CLOSING CLAWS WHEN THE LOAD IS CONTACTED, THE CLAWS ARE PIVOTED ON A BASE PLATE CONNECTED TO A SUSPENSION DEVICE AND CO-OPERATING WITH A DIFFERENTIAL DEVICE, SAID DIFFERENTIAL DEVICE BEING ATTACHED TO THE CLAWS AND OPERATIVELY ASSOCIATED TO A DISPLACEABLE PISTON CONTACTING THE LOAD.
Inventors
- 👤 E Butz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:42
CPC Classifications
B; B66; B66C; B66C1/00; B66C1/10; B66C1/62; B66C1/64
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
174 words
A hoist-clamp for automatically gripping and stabilizing a load being lifted in relation to the gravity-force imposed on the hoist-clamp by the load, comprising in combination: housing means; opposed jaw means pivotally mounted on said housing for engaging opposite sides of the load; piston means displaceably mounted on said housing for moving away from and into engagement with said load in relation to movement of said jaw means with respect to the load; means operatively connected between said jaw means and piston means for coordinating respective movement of the same; and suspension means operatively connected to said means, operatively connecting the jaw and piston means for lifting the hoist clamp whereby both the piston means and jaw means are urged toward said load in relation to gravity-force of said load; said coupling means comprising anti-friction means on said jaw means and said piston means, said suspension means comprising a cable reversely entrained over the anti-friction means of said piston means and beneath the anti-friction means of said jaw means and providing differential movement therebetween.
Claim 2
Dependent Claim
174 words
A hoist-clamp for automatically gripping and stabilizing a load being lifted in relation to the gravity-force imposed on the hoist-clamp by the load, comprising in combination: housing means; opposed jaw means pivotally mounted on said housing for engaging opposite sides of the load; piston means displaceably mounted on said housing for moving away from and into engagement with said load in relation to movement of said jaw means with respect to the load; means operatively connected between said jaw means and piston means for coordinating respective movement of the same; and suspension means operatively connected to said means, operatively connecting the jaw and piston means for lifting the hoist clamp whereby both the piston means and jaw means are urged toward said load in relation to gravity-force of said load; said coupling means comprising anti-friction means on said jaw means and said piston means, said suspension means comprising a cable reversely entrained over the anti-friction means of said piston means and beneath the anti-friction means of said jaw means and providing differential movement therebetween.
Claim 3
Dependent Claim
26 words
The combination as set forth in claim 1 including spring means operatively connected to said means coordinating respective movement for normally urging said jaw means apart.
Claim 4
Dependent Claim
35 words
The combination as set forth in claim 2 including locking means on said housing operatively connected to said jaw means for retaining the jaw means in an open position in opposition to said spring means.
Claim 5
Dependent Claim
43 words
The combination as claimed in claim 1 in which said means coordinating respective movement of the jaw and piston means comprises coupling means for said jaw means vertically displaceable relative to said housing whereby said jaw means can accomodate loads of different widths.
Claim 6
Dependent Claim
22 words
The combination as set forth in claim 1 in which said anti-friction means on said jaw means comprises pulley elements journaled thereon.
Claim 7
Dependent Claim
26 words
The combination as set forth in claim 1 in which said anti-friction means comprises a pulley element journaled on an upper portion of said piston means.
Claim 8
Dependent Claim
69 words
The combination as set forth in claim 6 in which said jaw means comprise lever elements intermediately journaled on said housing on mutually parallel axes of rotation, said lever elements including lower load-engaging portions extending toward each other, said lever elements including inwardly directed upper portions upon which said pulley elements are journaled, said piston means being disposed between said jaw means and having a lower distal load-engaging portion.
Claim 9
Dependent Claim
47 words
The combination as set forth in claim 7 in which said piston means has a lost-motion slot extending in the direction of movement of said piston means, said upper inwardly directed portions of said lever elements being pivotally connected to a shaft reciprocable in said lost-motion slot.
Claim 10
Dependent Claim
44 words
The combination as set forth in claim 8 including supplemental lever elements pivotally connected to said jaw means and said shaft, and spring means interposed between said housing and said supplemental lever elements for normally urging said shaft downwardly and said jaw means apart.
Claim 11
Dependent Claim
37 words
The combination as set forth in claim 9 in which said spring means includes guide rods connected to opposite ends of said shaft and reciprocably guided on said housing, and compression spring elements on said guide rods.
Claim 12
Dependent Claim
52 words
The combination as set forth in claim 10 including locking means comprising a lever member pivotally mounted on said housing, said lever member including a portion movable in a path intersecting the path of movement of at least one of said rods for engaging and retaining the same in a fixed 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) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |