US3085659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cushioned retarder
Assignee: Richards Wilcox Manufacturing Co
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Filing: 1961-03-21
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Granted: 1963-04-16
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Expires: 1981-03-21
Abstract
No abstract record available.
Inventors
- 👤 Lloyd R Ashmead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:41
CPC Classifications
B; B65; B65G; B65G9/00; B65G9/006; B61; B61B; B61B12/00; B61B12/10; B61B12/105; B61K; B61K7/00; B61K7/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
IN TROLLEY RETARDING MEANS, AN INCLINED TROLLEY TRACK AND A TROLLEY MOUNTED ON SAID TRACK FOR GRAVITY TRAVEL DOWNWARD THEREALONG, A LATCH MEMBER DISPOSED FOR CONTACT BY A TROLLEY TRAVELLING ALONG SAID TRACK, MEANS MOUNTING SAID LATCH MEMBER FOR DISPLACEMENT OUT OF THE PATH OF TRAVEL OF THE TROLLEY BY CONTACT WITH SAID MEMBER OF SAID TROLLEY WHEN THE LATTER IS TRAVELLING AT A SPEED WITHIN A PREDETERMINED LIMIT AND FOR PRECLUDING SUCH DISPLACEMENT OF SAID MEMBER WHEN THE TROLLEY IS TRAVELLING AT A SPEED IN EXCESS OF SAID LIMIT, SAID TRACK DIVERGING DOWNWARD FROM SAID LATCH MEMBER AND THE LATTER BEING MOUNTED FOR MOVEMENT LENGTHWISE OF SAID TRACK IN THE DIRECTION OF TRAVEL OF SAID TROLLEY, AND MEANS YIELDINGLY ACCOMMODATING MOVEMENT OF SAID LATCH MEMBER LENGTHWISE OF SAID TRACK UNDER IMPACT OF A TROLLEY TRAVELLING DOWN SAID TRACK AT EXCESSIVE SPEED AND TO AN EXTENT ENABLING SAID TROLLEY TO CLEAR SAID LATCH MEMBER AND CONTINUE ITS TRAVEL DOWNWARD ALONG SAID TRACK.
Claim 2
Dependent Claim
162 words
IN TROLLEY RETARDING MEANS, AN INCLINED TROLLEY TRACK AND A TROLLEY MOUNTED ON SAID TRACK FOR GRAVITY TRAVEL DOWNWARD THEREALONG, A LATCH MEMBER DISPOSED FOR CONTACT BY A TROLLEY TRAVELLING ALONG SAID TRACK, MEANS MOUNTING SAID LATCH MEMBER FOR DISPLACEMENT OUT OF THE PATH OF TRAVEL OF THE TROLLEY BY CONTACT WITH SAID MEMBER OF SAID TROLLEY WHEN THE LATTER IS TRAVELLING AT A SPEED WITHIN A PREDETERMINED LIMIT AND FOR PRECLUDING SUCH DISPLACEMENT OF SAID MEMBER WHEN THE TROLLEY IS TRAVELLING AT A SPEED IN EXCESS OF SAID LIMIT, SAID TRACK DIVERGING DOWNWARD FROM SAID LATCH MEMBER AND THE LATTER BEING MOUNTED FOR MOVEMENT LENGTHWISE OF SAID TRACK IN THE DIRECTION OF TRAVEL OF SAID TROLLEY, AND MEANS YIELDINGLY ACCOMMODATING MOVEMENT OF SAID LATCH MEMBER LENGTHWISE OF SAID TRACK UNDER IMPACT OF A TROLLEY TRAVELLING DOWN SAID TRACK AT EXCESSIVE SPEED AND TO AN EXTENT ENABLING SAID TROLLEY TO CLEAR SAID LATCH MEMBER AND CONTINUE ITS TRAVEL DOWNWARD ALONG SAID TRACK.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-15 | 1966-10-15 | 1967-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-15 | 1970-10-15 | 1971-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-15 | 1974-10-15 | 1975-04-16 | $7700.00 | Window Closed / Lapsed |