Patent US4551069A successfully refreshed from Google Patents.
US4551069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integral oil pressure sensor
Assignee: Copeland Corp LLC
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Filing: 1984-03-14
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Granted: 1985-11-05
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Expires: 2004-03-14
Abstract
Abstract An improved oil pump assembly for a refrigeration compressor is disclosed which includes a sensor located within the oil pump housing which is operative to de-energize the compressor in the event the pressure differential between the inlet and outlet of the oil pump drops below a predetermined level. Pressure sensing communication between the sensor and the inlet is provided via a cutout portion of the gasket between the pump and compressor housing.
Inventors
- 👤 Mark R. Gilmore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:17
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/02; F04C; F04C14/00; F04C14/06; F04B49/00; F04B49/10; F04C28/00; F04C28/06; F25; F25B; F25B31/00; F25B31/002
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
130 words
A pressure lubrication system for a refrigeration compressor comprising: a compressor housing; compressor means within said housing; motor means within said housing and drivingly connected to said compressor means; lubricant pump means drivenly connected to said motor means, said pump means being operative to supply lubricant to said compressor means and including a housing having an inlet and an outlet, said inlet communicating with a fluid reservoir which is subject to wide pressure differentials; and self-contained sensor means removably positioned within said pump housing and passage means within said pump housing for placing said sensor means in communication with said inlet and said outlet, said sensor means being operative to de-energize said motor in response to a sensed differential condition between said inlet and outlet outside of a predetermined range.
Claim 2
Dependent Claim
130 words
A pressure lubrication system for a refrigeration compressor comprising: a compressor housing; compressor means within said housing; motor means within said housing and drivingly connected to said compressor means; lubricant pump means drivenly connected to said motor means, said pump means being operative to supply lubricant to said compressor means and including a housing having an inlet and an outlet, said inlet communicating with a fluid reservoir which is subject to wide pressure differentials; and self-contained sensor means removably positioned within said pump housing and passage means within said pump housing for placing said sensor means in communication with said inlet and said outlet, said sensor means being operative to de-energize said motor in response to a sensed differential condition between said inlet and outlet outside of a predetermined range.
Claim 3
Dependent Claim
24 words
A pressure lubrication system as set forth in claim 1 wherein said sensor communicates with said pump inlet and outlet via internal passage means.
Claim 4
Dependent Claim
39 words
A pressure lubrication system as set forth in claim 1 wherein said pump housing is secured to said compressor means with gasket means interposed therebetween and said gasket means defines a flowpath between said inlet and said sensor means.
Claim 5
Dependent Claim
28 words
A pressure lubrication system as set forth in claim 3 wherein said flowpath defined by said gasket means comprises a cutout extending from said inlet to said sensor.
References Cited (Backward Citations)
US1294497A
Cited
US1603395A
Cited
US1743585A
Cited
GB385096A
Cited
US2390650A
Cited
US2441708A
Cited
US2413040A
Cited
US2968251A
Cited
US2793803A
Cited
US3135460A
Cited
US3796522A
Cited
US3695791A
Cited
US3715177A
Cited
US3716306A
Cited
US3806273A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-11-04 | 1989-05-06 | 1989-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-04 | 1993-05-06 | 1993-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-04 | 1997-05-06 | 1997-11-05 | $7700.00 | Window Closed / Lapsed |