US3558239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power steering back-up pressure system
Assignee: Borg Warner Corp
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Filing: 1969-06-25
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Granted: 1971-01-26
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Expires: 1989-06-25
Abstract
Abstract THE PRESENT INVENTION COMPRISES A PRESSURE SENSITIVE SWITCH, THAT IS OPERABLY ASSOCIATED WITH THE IGNITION SWITCH IN A MANNER SUCH THAT WHEN THE SERVO PUMP FOR POWER STEERING IS NOT OPERATING, THE PRESSURE SENSITIVE SWITCH CONNECTS A CIRCUIT THAT WILL PROVIDE CURRENT FROM THE BATTERY TO THE STARTER MOTOR WHICH OPERATES AN AUXILIARY HYDRAULIC PUMP FOR THE POWER STEERING SYSTEM.
Inventors
- 👤 Samuel Shiber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:56
CPC Classifications
B; B62; B62D; B62D5/00; B62D5/06; B62D5/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |