US3244038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-releasing lead screw
Assignee: FMC Corp
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Filing: 1963-10-08
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Granted: 1966-04-05
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Expires: 1983-10-08
Abstract
No abstract record available.
Inventors
- 👤 Donald R Lacy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:42
CPC Classifications
B; B23; B23Q; B23Q5/00; B23Q5/54; B23Q5/58; B23Q5/22; B23Q5/34; B23Q5/38; B23Q5/40; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576; Y10T74/18704; Y10T82/00; Y10T82/25; Y10T82/2531; Y10T82/2549
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
IN COMBINATION, A LATHE HAVING WAYS, A TOOL CARRIER SLIDABLE ALONG SAID WAYS, MEANS FOR FEEDING SAID TOOL CARRIER ALONG THE WAYS COMPRISING A LONGITUDINALLY EXTENDING FEED SHAFT EXTENDING THROUGH SAID CARRIER, AND NUT MEANS ON SAID CARRIER FOR THREADED ENGAGEMENT WITH THE BODY OF A LEAD SCREW MOUNTED ON SAID FEED SHAFT; A PLURALITY OF AXIALLY SPACED DETENT CAVITY MEANS FORMED IN SAID FEED SHAFT, A SELF RELEASING LEAD SCREW ASSEMBLY, SAID ASSEMBLY COMPRISING A LEAD SCREW SLIDABLY MOUNTED ON SAID FEED SHAFT AND DRIVEN BY THE SHAFT, AN PAWL MEANS ON THE HEAD END OF SAID LEAD SCREW FOR ENGAGING SAID FEED SHAFT DETENT CAVITY MEANS AND RESTRAINING THE LEAD SCREW AGAINST AXIAL SLIDING MOTION ALONG THE SHAFT IN A DIRECTION CONTRARY TO THE DIRECTION OF FEED OF THE SCREW, SAID PAWL MEANS AUTOMATICALLY ACCOMMODATING SLIDING MOTION OF THE LEAD SCREW ALONG THE SHAFT IN THE DIRECTION OF FEED OF THE SCREW IN RESPONSE TO FORCE APPLIED TO THE SCREW IN SAID LATTER DIRECTION.
Claim 2
Dependent Claim
166 words
IN COMBINATION, A LATHE HAVING WAYS, A TOOL CARRIER SLIDABLE ALONG SAID WAYS, MEANS FOR FEEDING SAID TOOL CARRIER ALONG THE WAYS COMPRISING A LONGITUDINALLY EXTENDING FEED SHAFT EXTENDING THROUGH SAID CARRIER, AND NUT MEANS ON SAID CARRIER FOR THREADED ENGAGEMENT WITH THE BODY OF A LEAD SCREW MOUNTED ON SAID FEED SHAFT; A PLURALITY OF AXIALLY SPACED DETENT CAVITY MEANS FORMED IN SAID FEED SHAFT, A SELF RELEASING LEAD SCREW ASSEMBLY, SAID ASSEMBLY COMPRISING A LEAD SCREW SLIDABLY MOUNTED ON SAID FEED SHAFT AND DRIVEN BY THE SHAFT, AN PAWL MEANS ON THE HEAD END OF SAID LEAD SCREW FOR ENGAGING SAID FEED SHAFT DETENT CAVITY MEANS AND RESTRAINING THE LEAD SCREW AGAINST AXIAL SLIDING MOTION ALONG THE SHAFT IN A DIRECTION CONTRARY TO THE DIRECTION OF FEED OF THE SCREW, SAID PAWL MEANS AUTOMATICALLY ACCOMMODATING SLIDING MOTION OF THE LEAD SCREW ALONG THE SHAFT IN THE DIRECTION OF FEED OF THE SCREW IN RESPONSE TO FORCE APPLIED TO THE SCREW IN SAID LATTER DIRECTION.
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) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |