Patent US3257142A successfully refreshed from Google Patents.
US3257142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Material handling system
Assignee: Individual
•
Filing: 1964-10-26
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Granted: 1966-06-21
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Expires: 1984-10-26
Abstract
No abstract record available.
Inventors
- 👤 Leonard D Barry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:58
CPC Classifications
B; B66; B66C; B66C1/00; B66C1/10; B66C1/62; B66C1/66; B66C13/00; B66C2700/00; B66C2700/01; B66C2700/012; B66C2700/017
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
IN COMBINATION A FRAME, A SELF-LATCHING HOOK PIVOTALLY SUSPENDED FROM SAID FRAME TO SWING TO ENGAGE A LOAD BELOW SAID FRAME, CAM MEANS FOR OPENING SAID HOOK WIDE WHEN LOWERED ON THE LOAD BELOW HOOKING POSITION, AND MEANS FOR DELAYING THE RETURN OF SAID HOOK COMPRISING, A LATCH PAWL OPERATED BY TEH SWINGING MOVEMENT OF THE HOOK, MEANS ENGAGING A LOAD TO BE LIFTED THEREBY WHENEVER SAID HOOK IS NEAR HOOKING POSITION OR BELOW, AND A TOOTH CONTROLLED BY SAID LAST MENTIONED MEANS TO LATCH WITH SAID PAWL TO HOLD SAID HOOK OPEN WHENEVER SAID LAST MENTIONED MEANS IS MOVED TO A POINT REPRESENTING THAT THE HOOK IS CAMMED OPENED BY THE LOAD ENOUGH TO CLEAR SAID LOAD, AND A STOP ON SAID FRAME ENGAGED BY SAID PAWL FOR UNLATCHING SAID PAWL TO CLOSE SAID HOOK WHEN SAID HOOK IS ABOVE SAID LOAD.
Claim 2
Dependent Claim
143 words
IN COMBINATION A FRAME, A SELF-LATCHING HOOK PIVOTALLY SUSPENDED FROM SAID FRAME TO SWING TO ENGAGE A LOAD BELOW SAID FRAME, CAM MEANS FOR OPENING SAID HOOK WIDE WHEN LOWERED ON THE LOAD BELOW HOOKING POSITION, AND MEANS FOR DELAYING THE RETURN OF SAID HOOK COMPRISING, A LATCH PAWL OPERATED BY TEH SWINGING MOVEMENT OF THE HOOK, MEANS ENGAGING A LOAD TO BE LIFTED THEREBY WHENEVER SAID HOOK IS NEAR HOOKING POSITION OR BELOW, AND A TOOTH CONTROLLED BY SAID LAST MENTIONED MEANS TO LATCH WITH SAID PAWL TO HOLD SAID HOOK OPEN WHENEVER SAID LAST MENTIONED MEANS IS MOVED TO A POINT REPRESENTING THAT THE HOOK IS CAMMED OPENED BY THE LOAD ENOUGH TO CLEAR SAID LOAD, AND A STOP ON SAID FRAME ENGAGED BY SAID PAWL FOR UNLATCHING SAID PAWL TO CLOSE SAID HOOK WHEN SAID HOOK IS ABOVE SAID LOAD.
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) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |