US3345818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tandem master cylinder
Assignee: Studebaker Worthington Inc
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Filing: 1966-01-10
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Granted: 1967-10-10
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Expires: 1986-01-10
Abstract
No abstract record available.
Inventors
- 👤 Arthur N Milster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:14
CPC Classifications
B; B60; B60T; B60T11/00; B60T11/10; B60T11/16; B60T11/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
193 words
A TANDEM MASTER CYLINDER COMPRISING A HOUSING HAVING A PAIR OF PRESSURE FLUID RESERVOIRS THEREIN, A PAIR OF FLUID PRESSURE CHAMBERS IN SAID HOUSING, PASSAGE MEANS IN SAID HOUSING NORMALLY CONNECTING ONE OF SAID CHAMBERS IN PRESSURE FLUID COMMUNICATION WITH ONE OF SAID RESERVOIRS, FIRST PISTON MEANS MOVABLE IN SAID HOUSING BETWEEN SAID CHAMBERS, SECOND PISTON MEANS MOVABLE IN SAID HOUSING CONTROLLING SAID PASSAGE MEANS AND INCLUDING EXTENSION MEANS EXTENDING THROUGH SAID FIRST PISTON MEANS AND SAID CHAMBERS, AND MEANS IN SAID HOUSING INCLUDING SAID EXTENSION MEANS DEFINING OTHER PASSAGE MEANS NORMALLY CONNECTING THE OTHER OF SAID CHAMBERS IN PRESSURE FLUID COMMUNICATION WITH THE OTHER OF SAID RESERVOIRS, SAID SECOND PISTON MEANS AND SAID EXTENSION MEANS BEING MOVABLE IN RESPONSE TO AN APPLIED FORCE TOWARD A POSITION CLOSING SAID FIRST NAMED AND OTHER PASSAGE MEANS TO INTERRUPT PRESSURE FLUID COMMUNICATION BETWEEN SAID CHAMBERS AND SAID RESERVOIRS AND ESTABLISH FLUID PRESSURE IN SAID ONE CHAMBER, AND SAID FIRST PISTON MEANS BEINGR MOVABLE IN RESPONSE TO THE ESTABLISED FLUID PRESSURE IN SAID ONE CHAMBER TOWARD A POSITION ESTABLISHING FLUID PRESSURE IN SAID OTHER CHAMBER IN A PREDETERMINED RATIO WITH THAT ESTABLISHED IN SAID ONE CHAMBER.
Claim 2
Dependent Claim
193 words
A TANDEM MASTER CYLINDER COMPRISING A HOUSING HAVING A PAIR OF PRESSURE FLUID RESERVOIRS THEREIN, A PAIR OF FLUID PRESSURE CHAMBERS IN SAID HOUSING, PASSAGE MEANS IN SAID HOUSING NORMALLY CONNECTING ONE OF SAID CHAMBERS IN PRESSURE FLUID COMMUNICATION WITH ONE OF SAID RESERVOIRS, FIRST PISTON MEANS MOVABLE IN SAID HOUSING BETWEEN SAID CHAMBERS, SECOND PISTON MEANS MOVABLE IN SAID HOUSING CONTROLLING SAID PASSAGE MEANS AND INCLUDING EXTENSION MEANS EXTENDING THROUGH SAID FIRST PISTON MEANS AND SAID CHAMBERS, AND MEANS IN SAID HOUSING INCLUDING SAID EXTENSION MEANS DEFINING OTHER PASSAGE MEANS NORMALLY CONNECTING THE OTHER OF SAID CHAMBERS IN PRESSURE FLUID COMMUNICATION WITH THE OTHER OF SAID RESERVOIRS, SAID SECOND PISTON MEANS AND SAID EXTENSION MEANS BEING MOVABLE IN RESPONSE TO AN APPLIED FORCE TOWARD A POSITION CLOSING SAID FIRST NAMED AND OTHER PASSAGE MEANS TO INTERRUPT PRESSURE FLUID COMMUNICATION BETWEEN SAID CHAMBERS AND SAID RESERVOIRS AND ESTABLISH FLUID PRESSURE IN SAID ONE CHAMBER, AND SAID FIRST PISTON MEANS BEINGR MOVABLE IN RESPONSE TO THE ESTABLISED FLUID PRESSURE IN SAID ONE CHAMBER TOWARD A POSITION ESTABLISHING FLUID PRESSURE IN SAID OTHER CHAMBER IN A PREDETERMINED RATIO WITH THAT ESTABLISHED IN SAID ONE CHAMBER.
References Cited (Backward Citations)
US2060854A
Cited
US3174285A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-09 | 1971-04-10 | 1971-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-09 | 1975-04-10 | 1975-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-09 | 1979-04-10 | 1979-10-10 | $7700.00 | Window Closed / Lapsed |