US3339707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Material handling apparatus
Assignee: McDowell-Wellman Engineering Co
•
Filing: 1966-02-04
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Granted: 1967-09-05
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Expires: 1986-02-04
Abstract
No abstract record available.
Inventors
- 👤 Ludwig Carl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:18
CPC Classifications
B; B65; B65G; B65G67/00; B66; B66C; B66C17/00; B65G2814/00; B65G2814/03; B65G2814/0397; B66C2700/00; B66C2700/01; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/0801; Y10T292/0848; Y10T292/0849; Y10T292/0853
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
IN A HOISTING APPARATUS A SUPPORT MEANS, A BOOM, MEANS PIVOTING SAID BOOM RELATIVE TO SAID SUPPORT MEANS, HOIST MEANS, MEANS SUPPORTED BY SAID SUPPORT MEANS AND CONNECTING SAID HOIST MEANS TO SAID BOOM, A MOVABLE COUNTERWEIGHT ASSEMBLY, MEANS CONNECTING SAID COUNTERWEIGHT ASSEMBLY TO SAID BOOM TO MOVE SAID COUNTERWEIGHT IN RESPONSE TO MOVEMENT OF SAID BOOM, SAID COUNTERWEIGHT ASSEMBLY INCLUDING A PLURALITY OF SEPARABLE WEIGHTS, A SUPPORT MEMBER POSITIONED IN THE PATH OF MOVEMENT OF SAID COUNTERWEIGHT ASSEMBLY, AT LEAST ONE OF SAID SEPARABLE WEIGHTS BEING CONSTRUCTED TO CONTACT AND REST UPON SAID SUPPORT MEMBER WHEN SAID BOOM IS RAISED TO A PREDETERMINED POSITION, AND SNUBBER SPRING MEANS DISPOSED BETWEEN SAID ONE SEPARABLE WEIGHT AND SAID SUPPORT MEMBER TO ABSORB THE LANDING SHOCK OF SAID ONE OF SAID SEPARABLE WEIGHTS AND TO ASSIST IN ACCELERATING SAID WEIGHT AS IT IS RAISED FROM SAID SUPPORT MEMBER.
Claim 2
Dependent Claim
146 words
IN A HOISTING APPARATUS A SUPPORT MEANS, A BOOM, MEANS PIVOTING SAID BOOM RELATIVE TO SAID SUPPORT MEANS, HOIST MEANS, MEANS SUPPORTED BY SAID SUPPORT MEANS AND CONNECTING SAID HOIST MEANS TO SAID BOOM, A MOVABLE COUNTERWEIGHT ASSEMBLY, MEANS CONNECTING SAID COUNTERWEIGHT ASSEMBLY TO SAID BOOM TO MOVE SAID COUNTERWEIGHT IN RESPONSE TO MOVEMENT OF SAID BOOM, SAID COUNTERWEIGHT ASSEMBLY INCLUDING A PLURALITY OF SEPARABLE WEIGHTS, A SUPPORT MEMBER POSITIONED IN THE PATH OF MOVEMENT OF SAID COUNTERWEIGHT ASSEMBLY, AT LEAST ONE OF SAID SEPARABLE WEIGHTS BEING CONSTRUCTED TO CONTACT AND REST UPON SAID SUPPORT MEMBER WHEN SAID BOOM IS RAISED TO A PREDETERMINED POSITION, AND SNUBBER SPRING MEANS DISPOSED BETWEEN SAID ONE SEPARABLE WEIGHT AND SAID SUPPORT MEMBER TO ABSORB THE LANDING SHOCK OF SAID ONE OF SAID SEPARABLE WEIGHTS AND TO ASSIST IN ACCELERATING SAID WEIGHT AS IT IS RAISED FROM SAID SUPPORT MEMBER.
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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) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |