Patent US3258920A successfully refreshed from Google Patents.
US3258920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lift installation
Assignee: Joyce Cridland Co
•
Filing: 1963-05-10
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Granted: 1966-07-05
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Expires: 1983-05-10
Abstract
No abstract record available.
Inventors
- 👤 Ion V K Hott
- 👤 David M Goldzwig
- 👤 Ii Warren E Webster
- 👤 Robert J Haddix
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:25
CPC Classifications
B; B66; B66F; B66F3/00; B66F3/24; B66F3/25; B66F3/42; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86863; Y10T137/87056; Y10T74/00; Y10T74/20; Y10T74/20012; Y10T74/20576; Y10T74/20636; Y10T74/20672; Y10T74/20708
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
IN A VEHICLE LIFT INSTALLATION, THE COMBINATON COMPRISING: A FLUID OPERATED JACKING UNIT; A FLUID RESERVOIR; AN ELECTRICALLY DRIVEN PUMP FOR PUMPING FLUID TO SAID JACKING UNIT; A NORMALLY CLOSED INLET VALVE LOCATED BETWEEN SAID JUMP AND SAID JACKING UNIT; MANUALLY OPERABLE MEANS INCLUDING A THREADLE MOVABLE FOR OPENING SAID INLET VALVE TO PERMIT FLUID TO FLOW TO SAID JACKING UNIT; A PROXIMITY SWITCH ADAPTED TO ENERGIZE SAID PUMP, SAID PROXIMITY SWITCH INCLUDING PAIR OF SWITCH CONTACTS WHICH OPEN AND CLOSE UPON MOVEMENT OF A FERROMAGNETIC ELEMENT ADJACENT A SURFACE PORTION THEREOF; A FERROMAGNETIC PLATE PIVOTALLY MOUNTED ADJACENT SAID SURFACE PORTION; MEANS BIASING SAID PLATE INTO A PREDETERMINED POSITION RELATIVE TO SAID SURFACE PORTION; AND MEANS CONNECTING SAID TREADLE AND SAID PLATE CAUSING SAID PLATE TO PIVOT AWAY FROM SAID PREDETERMINED POSITION UPON MOVEMENT OF SAID TREADLE, WHEREBY THE OPENED OR CLOSED CONDITION OF SAID SWITCH CONTACTS IS CHANGED.
Claim 2
Dependent Claim
149 words
IN A VEHICLE LIFT INSTALLATION, THE COMBINATON COMPRISING: A FLUID OPERATED JACKING UNIT; A FLUID RESERVOIR; AN ELECTRICALLY DRIVEN PUMP FOR PUMPING FLUID TO SAID JACKING UNIT; A NORMALLY CLOSED INLET VALVE LOCATED BETWEEN SAID JUMP AND SAID JACKING UNIT; MANUALLY OPERABLE MEANS INCLUDING A THREADLE MOVABLE FOR OPENING SAID INLET VALVE TO PERMIT FLUID TO FLOW TO SAID JACKING UNIT; A PROXIMITY SWITCH ADAPTED TO ENERGIZE SAID PUMP, SAID PROXIMITY SWITCH INCLUDING PAIR OF SWITCH CONTACTS WHICH OPEN AND CLOSE UPON MOVEMENT OF A FERROMAGNETIC ELEMENT ADJACENT A SURFACE PORTION THEREOF; A FERROMAGNETIC PLATE PIVOTALLY MOUNTED ADJACENT SAID SURFACE PORTION; MEANS BIASING SAID PLATE INTO A PREDETERMINED POSITION RELATIVE TO SAID SURFACE PORTION; AND MEANS CONNECTING SAID TREADLE AND SAID PLATE CAUSING SAID PLATE TO PIVOT AWAY FROM SAID PREDETERMINED POSITION UPON MOVEMENT OF SAID TREADLE, WHEREBY THE OPENED OR CLOSED CONDITION OF SAID SWITCH CONTACTS IS CHANGED.
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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) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |