US3209539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump and motor transmission
Assignee: Stanley Works GmbH
•
Filing: 1963-07-17
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Granted: 1965-10-05
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Expires: 1983-07-17
Abstract
No abstract record available.
Inventors
- 👤 Zimmermann Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:49
CPC Classifications
F; F16; F16H; F16H39/00; F16H39/04; F16H39/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
IN AN HYDRAULIC TRANSMISSION HAVING A FLUID PUMP, A FLUID OPERATED MOTOR, AND FLUID CONNECTION MEANS OPERABLY CONNECTING THE FLUID PUMP AND THE FLUID MOTOR, THE IMPROVEMENT WHEREIN THE FLUID PUMP COMPRISES A PISTON OPERATING CHAMBER AND A PISTON RECIPROCABLE IN THE OPERATING CHAMBER TO PROVIDE A PULSATING POSITIVE DISPLACEMENT OUTPUT; WHEREIN THE FLUID MOTOR IS A NONEXPANSIBLE FLUID MOTOR; AND WHEREIN THE HYDRAULIC TRANSMISSION COMPRISES A CLOSED FLUID CIRCUIT WITH THE FLUID MOTOR AND THE FLUID PUMP CONNECTED IN SERIES FLOW ARRANGEMENT THEREIN, PUMP INLET AND OUTLET ONE-WAY FLOW CONTROL MEANS, AND ACCUMULATOR MEANS IN THE FLUID CIRCUIT LOCATED BETWEEN THE PUMP OUTLET ONE-WAY FLOW CONTROL MEANS AND THE MOTOR INLET.
Claim 2
Dependent Claim
112 words
IN AN HYDRAULIC TRANSMISSION HAVING A FLUID PUMP, A FLUID OPERATED MOTOR, AND FLUID CONNECTION MEANS OPERABLY CONNECTING THE FLUID PUMP AND THE FLUID MOTOR, THE IMPROVEMENT WHEREIN THE FLUID PUMP COMPRISES A PISTON OPERATING CHAMBER AND A PISTON RECIPROCABLE IN THE OPERATING CHAMBER TO PROVIDE A PULSATING POSITIVE DISPLACEMENT OUTPUT; WHEREIN THE FLUID MOTOR IS A NONEXPANSIBLE FLUID MOTOR; AND WHEREIN THE HYDRAULIC TRANSMISSION COMPRISES A CLOSED FLUID CIRCUIT WITH THE FLUID MOTOR AND THE FLUID PUMP CONNECTED IN SERIES FLOW ARRANGEMENT THEREIN, PUMP INLET AND OUTLET ONE-WAY FLOW CONTROL MEANS, AND ACCUMULATOR MEANS IN THE FLUID CIRCUIT LOCATED BETWEEN THE PUMP OUTLET ONE-WAY FLOW CONTROL MEANS AND THE MOTOR INLET.
References Cited (Backward Citations)
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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) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |