Patent US3298489A successfully refreshed from Google Patents.
US3298489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic variable torque transmitter
Assignee: Individual
•
Filing: 1965-02-23
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Granted: 1967-01-17
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Expires: 1985-02-23
Abstract
No abstract record available.
Inventors
- 👤 Brand Daniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:19
CPC Classifications
F; F16; F16D; F16D31/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
A VARIABLE TORQUE TRANSMITTER COMPRISING: (A) A HOUSING HAVING A FLUID RECEIVING FIRST CHAMBER AND A FLUID RECEIVING SECOND CHAMBER, AN INLET PORT AND AN OUTLET PORT RESPECTIVELY COMMUNICATING THROUGH SAID HOUSING WITH SAID CHAMBERS, INPUT AND OUTPUT SHAFTS ROTATABLY MOUNTED ON SAID HOUSING AND RESPECTIVELY EXTENDING INTO SAID HOUSING, (B) A ROTOR MEMBER IN SAID HOUSING AND ROTATABLY FIXED TO ONE OF SAID SHAFTS FOR ROTATION THEREWITH, A ROTOR CASE IN SAID HOUSING AND ROTATABLY FIXED TO THE OTHER OF SAID SHAFTS FOR ROTATION THEREIWITH, A SEAL COOPERATING BETWEEN SAID HOUSING AND SAID ROTOR CASE AND ISOLATING SAID CHAMBERS FROM EACH OTHER, (C) PUMP MEANS COOPERATING BETWEEN SAID ROTOR MEMBER AND ROTOR CASE FOR RECEIVING FLUID FROM SAID FIRST CHAMBER AND APPLYING PUMPING FORCE THERETO UPON RELATIVE ROTARY MOTION BETWEEN SAID ROTOR MEMBER AND ROTOR CASE, MEANS FORMING A PASSAGEWAY FOR DIRECTING FLUID FROM SAID PUMP MEANS TO SAID SECOND CHAMBER, (D) FLOW LINE MEANS EXTENDING BETWEEN SAID INLET PORT AND SAID OUTLET PORT, AND A VARIABLE FLOW VALVE IN
Claim 2
Dependent Claim
171 words
A VARIABLE TORQUE TRANSMITTER COMPRISING: (A) A HOUSING HAVING A FLUID RECEIVING FIRST CHAMBER AND A FLUID RECEIVING SECOND CHAMBER, AN INLET PORT AND AN OUTLET PORT RESPECTIVELY COMMUNICATING THROUGH SAID HOUSING WITH SAID CHAMBERS, INPUT AND OUTPUT SHAFTS ROTATABLY MOUNTED ON SAID HOUSING AND RESPECTIVELY EXTENDING INTO SAID HOUSING, (B) A ROTOR MEMBER IN SAID HOUSING AND ROTATABLY FIXED TO ONE OF SAID SHAFTS FOR ROTATION THEREWITH, A ROTOR CASE IN SAID HOUSING AND ROTATABLY FIXED TO THE OTHER OF SAID SHAFTS FOR ROTATION THEREIWITH, A SEAL COOPERATING BETWEEN SAID HOUSING AND SAID ROTOR CASE AND ISOLATING SAID CHAMBERS FROM EACH OTHER, (C) PUMP MEANS COOPERATING BETWEEN SAID ROTOR MEMBER AND ROTOR CASE FOR RECEIVING FLUID FROM SAID FIRST CHAMBER AND APPLYING PUMPING FORCE THERETO UPON RELATIVE ROTARY MOTION BETWEEN SAID ROTOR MEMBER AND ROTOR CASE, MEANS FORMING A PASSAGEWAY FOR DIRECTING FLUID FROM SAID PUMP MEANS TO SAID SECOND CHAMBER, (D) FLOW LINE MEANS EXTENDING BETWEEN SAID INLET PORT AND SAID OUTLET PORT, AND A VARIABLE FLOW VALVE IN
References Cited (Backward Citations)
US2293731A
Cited
US2581172A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-16 | 1970-07-18 | 1971-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-16 | 1974-07-18 | 1975-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-16 | 1978-07-18 | 1979-01-17 | $7700.00 | Window Closed / Lapsed |