Patent US3556677A successfully refreshed from Google Patents.
US3556677A
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US
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Submersible pump switch assembly
Assignee: Tait Manufacturing Co
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Filing: 1969-01-22
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Granted: 1971-01-19
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Expires: 1989-01-22
Abstract
Abstract A SUBMERSIBLE PUMP INCORPORATES A MOTOR HOUSING INTEGRALLY CONNECTED TO A SWITCH HOUSING WHICH FORMS A CHAMBER HAVING A LOWER OPEN END DEFINED BY A COUNTERBORE. A DIAPHRAGM SWITCH IS SUPPORTED WITHIN THE COUNTERBORE BY A SECOND RESILIENT DIAPHRAGM HAVING AN ANNULAR PORTION WHICH EXTENDS INTO THE COUNTERBORE AND AROUND A PERIPHERAL FLANGE OF THE SWITCH TO FORM A RADIALLY COMPRESSED FLUID TIGHT SEAL. THE SWITCH AND SECOND DIAPHRAGM ARE SECURED BY A RIGID PERFORATED COVER WHICH PROTECTS THE SECOND DIAPHRAGM AND IS EFFECTIVE TO URGE THE ANNULAR PORTION AXIALLY AGAINST THE RADIAL SHOULDER OF THE COUNTERBORE TO FORM AN AXIALLY COMPRESSED FLUID TIGHT SEAL.
Inventors
- 👤 David L Tremain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:39
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/24; H01H35/34; F; F04; F04D; F04D13/00; F04D13/02; F04D13/06; F04D13/08; F04D13/086; F04D15/00; F04D15/02; F04D15/0209; F04D15/0218; H02; H02K; H02K17/00; H02K17/02; H02K17/30; H02K5/00; H02K5/04; H02K5/12; H02K5/132
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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |