US3222555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor protection means for hermetically sealed motor-compressor units
Assignee: Robertshaw US Holding Corp
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Filing: 1962-03-06
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Granted: 1965-12-07
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Expires: 1982-03-06
Abstract
No abstract record available.
Inventors
- 👤 Philip H Snoberger
- 👤 Oskar H Buschmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:50
CPC Classifications
H; H02; H02K; H02K11/00; H02K11/20; H02K11/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
IN AN HERMETICALLY SEALED MOTOR-COMPRESSOR UNIT COMPRISING A REFRIGERANT COMPRESSING PORTION AND AN ELECTRIC MOTOR PORTION INCLUDING A FIELD WINDING HAVING A PLURALITY OF TURNS FOR CARRYING THE MOTOR CURRENT, SAID TURNS INCLUDING STRAIGHT INTERMEDIATE PORTIONS EXTENDING AXIALLY OF THE MOTOR AND TURNED PORTIONS AT THE ENDS OF SAID TURNS, MOTOR PROTECTION MEANS COMPRISING: (A) A PRESSURE RESPONSIVE SWITCH CONNECTED TO CONTROL ENERGIZATION OF SAID MOTOR, (B) SAID SWITCH COMPRISING AN HERMETICALLY SEALED CASING MOUNTED WITHIN SAID UNIT, (C) ONE OF SAID TURNS COMPRISING A CURRENT CARRYING TUBULAR MEMBER MEANS CONTAINING THERMALLY EXPANSIBLE FLUID, (D) SAID TUBULAR MEMBER MEANS BEING CONNECTED BY CAPILLARY TUBE MEANS TO SAID SWITCH TO EFFECT OPENING THEREOF UPON SAID TUBULAR MEMBER MEANS BEING HEATED TO A PREDETERMINED TEMPERATURE, AND (E) SAID TUBULAR MEMBER MEANS BEING IN CLOSE HEAT EXCHANGE RELATION AND CO-EXTENDING WITH THE INTERMEDIATE PORTION AND AN END PORTION OF SAID WINDING.
Claim 2
Dependent Claim
148 words
IN AN HERMETICALLY SEALED MOTOR-COMPRESSOR UNIT COMPRISING A REFRIGERANT COMPRESSING PORTION AND AN ELECTRIC MOTOR PORTION INCLUDING A FIELD WINDING HAVING A PLURALITY OF TURNS FOR CARRYING THE MOTOR CURRENT, SAID TURNS INCLUDING STRAIGHT INTERMEDIATE PORTIONS EXTENDING AXIALLY OF THE MOTOR AND TURNED PORTIONS AT THE ENDS OF SAID TURNS, MOTOR PROTECTION MEANS COMPRISING: (A) A PRESSURE RESPONSIVE SWITCH CONNECTED TO CONTROL ENERGIZATION OF SAID MOTOR, (B) SAID SWITCH COMPRISING AN HERMETICALLY SEALED CASING MOUNTED WITHIN SAID UNIT, (C) ONE OF SAID TURNS COMPRISING A CURRENT CARRYING TUBULAR MEMBER MEANS CONTAINING THERMALLY EXPANSIBLE FLUID, (D) SAID TUBULAR MEMBER MEANS BEING CONNECTED BY CAPILLARY TUBE MEANS TO SAID SWITCH TO EFFECT OPENING THEREOF UPON SAID TUBULAR MEMBER MEANS BEING HEATED TO A PREDETERMINED TEMPERATURE, AND (E) SAID TUBULAR MEMBER MEANS BEING IN CLOSE HEAT EXCHANGE RELATION AND CO-EXTENDING WITH THE INTERMEDIATE PORTION AND AN END PORTION OF SAID WINDING.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |