Patent US3345480A successfully refreshed from Google Patents.
US3345480A
Expired / Lapsed
US
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Pressure switch with low-pressure cut-off
Assignee: Schneider Electric USA Inc
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Filing: 1965-10-22
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Granted: 1967-10-03
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Expires: 1985-10-22
Abstract
No abstract record available.
Inventors
- 👤 Josef J Zeller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:12
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/24; H01H35/26; H01H35/2607; H01H35/2614; H01H35/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
IN A PRESSURE SWITCH HAVING SEPARABLE CONTACTS AND A SUPPORTING FRAME, AN OPERATING LEVER PIVOTED ON SAID FRAME AND MOVABLE IN RESPONSE TO VARIATIONS IN PRESSURE TO WHICH THE SWITCH IS SUBJECTED, A MECHANISM OPERATED BY SAID OPERATING LEVER FOR CAUSING OPENING AND CLOSING OF SAID CONTACTS AT PRESELECTED HIGH AND INTERMEDIATE PRESSURES, RESPECTIVELY, THE IMPROVEMENT COMPRISING A LOWPRESSURE RELEASE LEVER FULCRUMED INTERMEDIATE ITS ENDS ON SAID FRAME AND HAIVNG A FIRST END PORTION IN THE PATH OF MOVEMENT OF SAID OPERATING LEVER AND A SECOND END PORTION POSITIONED TO ENGAGE SAID MECHANISM UPON MOVEMENT OF SAID FIRST END PORTION IN ONE DIRECTION, SAID OPERATING LEVER UNDER CONDITIONS OF PREDETERMINED LOW PRESSURE EN-
Claim 2
Dependent Claim
113 words
IN A PRESSURE SWITCH HAVING SEPARABLE CONTACTS AND A SUPPORTING FRAME, AN OPERATING LEVER PIVOTED ON SAID FRAME AND MOVABLE IN RESPONSE TO VARIATIONS IN PRESSURE TO WHICH THE SWITCH IS SUBJECTED, A MECHANISM OPERATED BY SAID OPERATING LEVER FOR CAUSING OPENING AND CLOSING OF SAID CONTACTS AT PRESELECTED HIGH AND INTERMEDIATE PRESSURES, RESPECTIVELY, THE IMPROVEMENT COMPRISING A LOWPRESSURE RELEASE LEVER FULCRUMED INTERMEDIATE ITS ENDS ON SAID FRAME AND HAIVNG A FIRST END PORTION IN THE PATH OF MOVEMENT OF SAID OPERATING LEVER AND A SECOND END PORTION POSITIONED TO ENGAGE SAID MECHANISM UPON MOVEMENT OF SAID FIRST END PORTION IN ONE DIRECTION, SAID OPERATING LEVER UNDER CONDITIONS OF PREDETERMINED LOW PRESSURE EN-
References Cited (Backward Citations)
US2741678A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-02 | 1971-04-03 | 1971-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-02 | 1975-04-03 | 1975-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-02 | 1979-04-03 | 1979-10-03 | $7700.00 | Window Closed / Lapsed |