Patent US3187248A successfully refreshed from Google Patents.
US3187248A
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Power tool overload protection
Assignee: Texas Instruments Inc
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Filing: 1961-06-21
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Granted: 1965-06-01
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Expires: 1981-06-21
Abstract
No abstract record available.
Inventors
- 👤 Wilfred W Cardin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:14
CPC Classifications
H; H01; H01H; H01H89/00; H01H89/04; H01H37/00; H01H37/02; H01H37/32; H01H37/52; H01H37/54; H01H37/5409; H01H9/00; H01H9/02; H01H9/06; H02; H02K; H02K11/00; H02K11/20; H02K11/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
IN COMBINATION A POWER TOOL HAVING AN OPERATING TRIGGER AND A FAN-COOLED MOTOR WINDING, A PROTECTIVE STARTING AND STOPPING SWITCH ASSEMBLY LOCATED IN THE AIR PATH OF THE FAN AND INCLUDING TERMINALS CONNECTING THE MOTOR WINDING WITH A SUPPLY CIRCUIT, SAID ASSEMBLY ALSO INCLUDING A THERMOSTATIC SWITCH AND A MANUAL SWITCH ADAPTED FOR SERIES-CIRCUIT CONNECTION BETWEEN SAID TERMINALS, SAID THERMOSTATIC SWITCH BEING LOCATED IN CLOSE HEAT-EXCHANGE RELATION TO THE MOTOR WINDING, A MOVABLE MEMBER EX-
Claim 2
Dependent Claim
75 words
IN COMBINATION A POWER TOOL HAVING AN OPERATING TRIGGER AND A FAN-COOLED MOTOR WINDING, A PROTECTIVE STARTING AND STOPPING SWITCH ASSEMBLY LOCATED IN THE AIR PATH OF THE FAN AND INCLUDING TERMINALS CONNECTING THE MOTOR WINDING WITH A SUPPLY CIRCUIT, SAID ASSEMBLY ALSO INCLUDING A THERMOSTATIC SWITCH AND A MANUAL SWITCH ADAPTED FOR SERIES-CIRCUIT CONNECTION BETWEEN SAID TERMINALS, SAID THERMOSTATIC SWITCH BEING LOCATED IN CLOSE HEAT-EXCHANGE RELATION TO THE MOTOR WINDING, A MOVABLE MEMBER EX-
References Cited (Backward Citations)
US2434984A
Cited
US2958748A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-05-31 | 1968-11-30 | 1969-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-31 | 1972-11-30 | 1973-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-31 | 1976-11-30 | 1977-06-01 | $7700.00 | Window Closed / Lapsed |