Patent US3170378A successfully refreshed from Google Patents.
US3170378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic motor
Assignee: Motors Liquidation Co
•
Filing: 1962-12-12
•
Granted: 1965-02-23
•
Expires: 1982-12-12
Abstract
No abstract record available.
Inventors
- 👤 Robert P Rohde
- 👤 William B Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:57
CPC Classifications
B; B60; B60S; B60S1/00; B60S1/02; B60S1/04; B60S1/06; B60S1/12; B60S1/125
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A WIPER MOTOR INCLUDING, A CYLINDER, A DIFFERENTIAL AREA PISTON THEREIN, A MANUAL CONTROL VALVE WHICH, WHEN OPEN, CONSTANTLY SUBJECTS THE SMALLER PISTON AREA TO PRESSURE, VALVE MEANS CARRIED BY SAID PISTON AND ACTUATED AT OPPOSITE ENDS OF THE RUNNING STROKE OF THE PISTON FOR ALTERNATELY CONNECTING THE LARGER AREA OF THE PISTON TO PRESSURE AND DRAIN TO RECIPROCATE THE SAME, AND POWER MEANS ACTING ON THE LARGER AREA OF SAID PISTON FOR AUTOMATICALLY PARKING SAID PISTON OUTSIDE OF ITS RUNNING STROKE WHEN THE MANUAL VALVE IS MOVED TO THE "OFF" POSITION WHEREAT BOTH PISTON AREA ARE CONNECTED TO DRAIN.
Claim 2
Dependent Claim
100 words
A WIPER MOTOR INCLUDING, A CYLINDER, A DIFFERENTIAL AREA PISTON THEREIN, A MANUAL CONTROL VALVE WHICH, WHEN OPEN, CONSTANTLY SUBJECTS THE SMALLER PISTON AREA TO PRESSURE, VALVE MEANS CARRIED BY SAID PISTON AND ACTUATED AT OPPOSITE ENDS OF THE RUNNING STROKE OF THE PISTON FOR ALTERNATELY CONNECTING THE LARGER AREA OF THE PISTON TO PRESSURE AND DRAIN TO RECIPROCATE THE SAME, AND POWER MEANS ACTING ON THE LARGER AREA OF SAID PISTON FOR AUTOMATICALLY PARKING SAID PISTON OUTSIDE OF ITS RUNNING STROKE WHEN THE MANUAL VALVE IS MOVED TO THE "OFF" POSITION WHEREAT BOTH PISTON AREA ARE CONNECTED TO DRAIN.
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) | 1968-02-23 | 1968-08-24 | 1969-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-23 | 1972-08-24 | 1973-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-23 | 1976-08-24 | 1977-02-23 | $7700.00 | Window Closed / Lapsed |