US3300697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic starting device for an electric motor which drives heavy machine elements
Assignee: Landis Tool Co
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Filing: 1963-11-21
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Granted: 1967-01-24
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Expires: 1983-11-21
Abstract
No abstract record available.
Inventors
- 👤 Ernest M Woodford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:26
CPC Classifications
H; H02; H02P; H02P1/00; H02P1/16; H02P1/166; Y; Y10; Y10T; Y10T74/00; Y10T74/15; Y10T74/1526; Y10T74/1529; Y10T74/1558; Y10T74/1584
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
IN A HEADSTOCK FOR A MACHINE TOOL FOR MACHINING HEAVY WORKPIECES IN WHICH THE POWER REQUIRED TO START ROTATION OF SAID WORKPIECE IS SUBSTANTIALLY GREATER THAN THAT REQUIRED TO MAINTAIN ROTATION, A WORK DRIVE MEMBER, A MOTOR FOR DRIVING SAID WORK DRIVE MEMBER, MEANS FOR ASSISTING SAID MOTOR TO INITIATE ROTATION OF SAID WORK DRIVE MEMBER COMPRISING RATCHET TEETH ON SAID WORK DRIVE MEMBER, AND A HYDRAULICALLY OPERATED PAWL FOR ENGAGING SAID RATCHET TEETH TO START ROTATION OF SAID WORK DRIVE MEMBER, A SUPPLY OF POWER FOR OPERATING SAID MOTOR, A SUPPLY OF FLUID UNDER PRESSURE, AND A PRESSURE SWITCH OPERABLE BY SAID FLUID UNDER PRESSURE WHEN APPLIED TO SAID HYDRAULICALLY OPERATED PAWL TO CONNECT SAID MOTOR WITH SAID POWER SUPPLY.
Claim 2
Dependent Claim
121 words
IN A HEADSTOCK FOR A MACHINE TOOL FOR MACHINING HEAVY WORKPIECES IN WHICH THE POWER REQUIRED TO START ROTATION OF SAID WORKPIECE IS SUBSTANTIALLY GREATER THAN THAT REQUIRED TO MAINTAIN ROTATION, A WORK DRIVE MEMBER, A MOTOR FOR DRIVING SAID WORK DRIVE MEMBER, MEANS FOR ASSISTING SAID MOTOR TO INITIATE ROTATION OF SAID WORK DRIVE MEMBER COMPRISING RATCHET TEETH ON SAID WORK DRIVE MEMBER, AND A HYDRAULICALLY OPERATED PAWL FOR ENGAGING SAID RATCHET TEETH TO START ROTATION OF SAID WORK DRIVE MEMBER, A SUPPLY OF POWER FOR OPERATING SAID MOTOR, A SUPPLY OF FLUID UNDER PRESSURE, AND A PRESSURE SWITCH OPERABLE BY SAID FLUID UNDER PRESSURE WHEN APPLIED TO SAID HYDRAULICALLY OPERATED PAWL TO CONNECT SAID MOTOR WITH SAID POWER SUPPLY.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |