US3311200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrodynamic brake
Assignee: F Perkins Engines Ltd
•
Filing: 1963-12-18
•
Granted: 1967-03-28
•
Expires: 1983-12-18
Abstract
No abstract record available.
Inventors
- 👤 William J Hayward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:21
CPC Classifications
F; F16; F16D; F16D57/00; F16D57/005; F16D57/04; F16H; F16H47/00; F16H47/06; F16H47/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
A HYDRODYNAMIC BRAKE COMPRISING; A BRAKE CHAMBER, AN INLET INTO SAID CHAMBER, A SOURCE OF FLUID UNDER PRESSURE IN COMMUNICATION WITH SAID INLET, AN OUTLET FROM SAID CHAMBER, A REACTION MEMBER DISPOSED INSIDE SAID CHAMBER, A ROTOR ADAPTED TO IMPEL FLUID TOWARDS SAID REACTION MEMBER, AND CONTROL MEANS INCLUDING A SELECTIVELY MOVABLE VALVE, MEANS CONNECTING SAID INLET AND SAID OUTLET WITH SAID VALVE, AND BIASING MEANS CONTINUOUSLY BIASING SAID VALVE TOWARD A FIRST POSITION IN WHICH SAID INLET IS CLOSED AND SAID OUTLET IS OPEN, SAID VALVE MOVABLE BETWEEN SAID FIRST POSITION AND A SECOND POSITION IN WHICH SAID INLET IS COMPLETELY OPEN AND SAID OUTLET IS COMPLETELY OPEN TO METER FLOW THROUGH SAID INLET AND THEREAFTER MOVABLE BETWEEN SAID SECOND POSITION AND A THIRD POSITION TO METER FLOW THROUGH SAID OUTLET AS SAID INLET IS MAINTAINED COMPLETELY OPEN SAID VALVE BEING MOVABLE IN A SINGLE LINEAR DIRECTION FROM SAID FIRST POSITION TO SAID SECOND POSITION AND THEN TO SAID THIRD POSITION, AND VICE VERSA.
Claim 2
Dependent Claim
165 words
A HYDRODYNAMIC BRAKE COMPRISING; A BRAKE CHAMBER, AN INLET INTO SAID CHAMBER, A SOURCE OF FLUID UNDER PRESSURE IN COMMUNICATION WITH SAID INLET, AN OUTLET FROM SAID CHAMBER, A REACTION MEMBER DISPOSED INSIDE SAID CHAMBER, A ROTOR ADAPTED TO IMPEL FLUID TOWARDS SAID REACTION MEMBER, AND CONTROL MEANS INCLUDING A SELECTIVELY MOVABLE VALVE, MEANS CONNECTING SAID INLET AND SAID OUTLET WITH SAID VALVE, AND BIASING MEANS CONTINUOUSLY BIASING SAID VALVE TOWARD A FIRST POSITION IN WHICH SAID INLET IS CLOSED AND SAID OUTLET IS OPEN, SAID VALVE MOVABLE BETWEEN SAID FIRST POSITION AND A SECOND POSITION IN WHICH SAID INLET IS COMPLETELY OPEN AND SAID OUTLET IS COMPLETELY OPEN TO METER FLOW THROUGH SAID INLET AND THEREAFTER MOVABLE BETWEEN SAID SECOND POSITION AND A THIRD POSITION TO METER FLOW THROUGH SAID OUTLET AS SAID INLET IS MAINTAINED COMPLETELY OPEN SAID VALVE BEING MOVABLE IN A SINGLE LINEAR DIRECTION FROM SAID FIRST POSITION TO SAID SECOND POSITION AND THEN TO SAID THIRD POSITION, AND VICE VERSA.
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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) | 1970-03-27 | 1970-09-26 | 1971-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-27 | 1974-09-26 | 1975-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-27 | 1978-09-26 | 1979-03-28 | $7700.00 | Window Closed / Lapsed |