Patent US3146728A successfully refreshed from Google Patents.
US3146728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Car spotter with retarding action
Assignee: Individual
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Filing: 1960-05-10
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Granted: 1964-09-01
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Expires: 1980-05-10
Abstract
No abstract record available.
Inventors
- 👤 Richard B Doorley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:59
CPC Classifications
B; B61; B61J; B61J3/00; B61J3/08; B61K; B61K7/00; B61K7/02; B61K7/04; B61K7/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
CAR SPOTTER FOR AN INTERCOUPLED CAR TRIP ON A TRACK, SAID SPOTTER COMPRISING IN COMBINATION WITH A MOTOR AND PUMP UNIT LOCATED OFFSIDE SAID TRACK, A TRACK UNIT SECURED WITHIN THE GAUGE OF THE TRACK AND COMPRISING A PLURALITY OF HYDRAULIC DRIVE CYLINDERS ARRANGED SIDE BY SIDE, PAWL MEANS CONNECTED TO THE CYLINDERS FOR BEING ACTIVELY DRIVEN THEREBY AND ENGAGEABLE WITH MEANS ON EACH CAR TO ADVANCE THE TRIP OF CARS FROM SPOT TO SPOT, VALVE-CONTROLLED HYDRAULIC MEANS CONNECTING SAID MOTOR AND PUMP UNIT TO SAID TRACK UNIT FOR INDEPENDENTLY CONTROLLING SAID CYLINDERS SO THAT THE PAWL MEANS DRIVEN BY ONE CYLINDER MAY BE ADVANCED AT A GREATER RATE THAN THE OTHER PAWL MEANS TO THEREBY DISENGAGE SAID PAWL MEANS FROM SAID MEANS ON SAID CAR WHILE THE PAWL MEANS DRIVEN BY ANOTHER CYLINDER CONTINUES THE ACTIVE ADVANCE OF THE TRIP OF CARS, THERE BEING SOLENOID VALVE OPEATING MEANS AND
Claim 2
Dependent Claim
150 words
CAR SPOTTER FOR AN INTERCOUPLED CAR TRIP ON A TRACK, SAID SPOTTER COMPRISING IN COMBINATION WITH A MOTOR AND PUMP UNIT LOCATED OFFSIDE SAID TRACK, A TRACK UNIT SECURED WITHIN THE GAUGE OF THE TRACK AND COMPRISING A PLURALITY OF HYDRAULIC DRIVE CYLINDERS ARRANGED SIDE BY SIDE, PAWL MEANS CONNECTED TO THE CYLINDERS FOR BEING ACTIVELY DRIVEN THEREBY AND ENGAGEABLE WITH MEANS ON EACH CAR TO ADVANCE THE TRIP OF CARS FROM SPOT TO SPOT, VALVE-CONTROLLED HYDRAULIC MEANS CONNECTING SAID MOTOR AND PUMP UNIT TO SAID TRACK UNIT FOR INDEPENDENTLY CONTROLLING SAID CYLINDERS SO THAT THE PAWL MEANS DRIVEN BY ONE CYLINDER MAY BE ADVANCED AT A GREATER RATE THAN THE OTHER PAWL MEANS TO THEREBY DISENGAGE SAID PAWL MEANS FROM SAID MEANS ON SAID CAR WHILE THE PAWL MEANS DRIVEN BY ANOTHER CYLINDER CONTINUES THE ACTIVE ADVANCE OF THE TRIP OF CARS, THERE BEING SOLENOID VALVE OPEATING MEANS AND
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) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |