US3846052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metering pump
Assignee: Motors Liquidation Co
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Filing: 1973-08-08
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Granted: 1974-11-05
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Expires: 1993-08-08
Abstract
Abstract An oil metering pump for metering oil to lubricate an engine''s gas seals has a pump section that delivers oil at a rate that increases with increasing engine load, a pressure control valve that operates to control the pumped oil so that its pressure is dependent on that developed by the pumping pump section and is independent of varying inlet pressure to the pump, and a discharge-bypass valve that is driven at a speed proportional to engine speed and operates to alternately deliver the pressure controlled oil back to the pump inlet and to lubricate the seals so that there is maintained substantially uniform oil flow for seal lubrication at constant engine loads.
Inventors
- 👤 E Scheibe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:55
CPC Classifications
F; F01; F01M; F01M3/00; F01C; F01C21/00; F01C21/04; F02; F02B; F02B53/00; F02B2053/005; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
219 words
An oil metering pump for metering oil to lubricate an engine''s seals comprising a pump inlet port, a pump outlet port, pumping means for pumping oil from said pump inlet port to said pump outlet port at a rate that increases with increasing engine load, a pressure controlled delivery port, pressure control valve means oppositely biased by oil pressure from said pump inlet port and from said pump outlet port for providing controlled connection of said pump outlet port to said pressure controlled delivery port so that the oil pressure in said pressure controlled delivery port is dependent on the pressure developed by said pumping means and is independent of varying pressure at said pump inlet port, a pump discharge port for delivering oil from said pump to lubricate the engine''s seals, a bypass port connected to said pump inlet port, and discharge-bypass valve means driven at a speed proportional to engine speed for connecting said pressure controlled delivery port alternately to said pump discharge port and said bypass port so that oil from said pressure controlled delivery port is intermittently delivered back to said pump inlet port to effect substantially uniform oil flow through said pressure controlled delivery port at substantially constant engine loads to maintain substantially uniform oil flow for seal lubrication at substantially constant engine loads.
Claim 2
Dependent Claim
219 words
An oil metering pump for metering oil to lubricate an engine''s seals comprising a pump inlet port, a pump outlet port, pumping means for pumping oil from said pump inlet port to said pump outlet port at a rate that increases with increasing engine load, a pressure controlled delivery port, pressure control valve means oppositely biased by oil pressure from said pump inlet port and from said pump outlet port for providing controlled connection of said pump outlet port to said pressure controlled delivery port so that the oil pressure in said pressure controlled delivery port is dependent on the pressure developed by said pumping means and is independent of varying pressure at said pump inlet port, a pump discharge port for delivering oil from said pump to lubricate the engine''s seals, a bypass port connected to said pump inlet port, and discharge-bypass valve means driven at a speed proportional to engine speed for connecting said pressure controlled delivery port alternately to said pump discharge port and said bypass port so that oil from said pressure controlled delivery port is intermittently delivered back to said pump inlet port to effect substantially uniform oil flow through said pressure controlled delivery port at substantially constant engine loads to maintain substantially uniform oil flow for seal lubrication at substantially constant engine loads.
Claim 3
Dependent Claim
228 words
An oil metering pump for metering oil to lubricate an engine''s seals comprising a pump inlet port, a pump outlet port, pumpiNg means including a pump rotor driven at a speed proportional to engine speed for pumping oil from said pump inlet port to said pump outlet port at a rate that increases with increasing engine load, a pressure controlled delivery port, pressure control valve means oppositely biased by oil pressure from said pump inlet port and from said pump outlet port for providing controlled connection of said pump outlet port to said pressure controlled delivery port so that the oil pressure in said pressure controlled delivery port is dependent on the pressure developed by said pumping means and is independent of varying pressure at said pump inlet port, a pump discharge port for delivering oil from said pump to lubricate the engine''s seals, a bypass port connected to said pump intake port, and a discharge-bypass passage rotatable with said pump rotor for connecting said pressure controlled delivery port alternately to said pump discharge port and said bypass port so that oil from said pressure controlled delivery port is intermittently delivered back to said pump inlet port to effect substantially uniform oil flow through said pressure controlled delivery port at substantially constant engine loads to maintain substantially uniform oil flow for seal lubrication at substantially constant engine loads.
Claim 4
Dependent Claim
228 words
An oil metering pump for metering oil to lubricate an engine''s seals comprising a pump inlet port, a pump outlet port, pumpiNg means including a pump rotor driven at a speed proportional to engine speed for pumping oil from said pump inlet port to said pump outlet port at a rate that increases with increasing engine load, a pressure controlled delivery port, pressure control valve means oppositely biased by oil pressure from said pump inlet port and from said pump outlet port for providing controlled connection of said pump outlet port to said pressure controlled delivery port so that the oil pressure in said pressure controlled delivery port is dependent on the pressure developed by said pumping means and is independent of varying pressure at said pump inlet port, a pump discharge port for delivering oil from said pump to lubricate the engine''s seals, a bypass port connected to said pump intake port, and a discharge-bypass passage rotatable with said pump rotor for connecting said pressure controlled delivery port alternately to said pump discharge port and said bypass port so that oil from said pressure controlled delivery port is intermittently delivered back to said pump inlet port to effect substantially uniform oil flow through said pressure controlled delivery port at substantially constant engine loads to maintain substantially uniform oil flow for seal lubrication at substantially constant engine loads.
Claim 5
Dependent Claim
272 words
An oil metering pump for metering oil to lubricate an engine''s seals comprising a pump inlet port, a pump outlet port, pumping means including a pump rotor driven at a speed proportional to engine speed for pumping oil from said pump inlet port to said pump outlet port at a rate that increases with increasing engine load, a cylindrical valve bore, a pressure controlled delivery port open to said valve bore, pressure control valve means oppositely biased by oil pressure from said pump inlet port and from said pump outlet port for providing controlled connection of said pump outlet port to said pressure controlled delivery port so that the oil pressure in said pressure controlled delivery port is dependent on the pressure developed by said pumping means and is independent of varying pressure at said pump inlet port, a pump discharge port open to said valve bore for delivering oil from said pump to lubricate the engine''s seals, a bypass port connected to said pump inlet port and open to said valve bore, said pump motor having a cylindrical valve extending into said valve bore past all of the ports open thereto, and said valve having a discharge-bypass port continuously open to said pressure controlled delivery port and alternately open to said pump discharge port and said bypass port as said valve rotates so that oil from said pressure controlled delivery port is intermittently delivered back to said pump inlet port to effect substantially uniform oil flow through said pressure controlled delivery port at substantially constant engine loads to maintain substantially uniform oil flow for seal lubrication at substantially constant engine loads.
Claim 6
Dependent Claim
272 words
An oil metering pump for metering oil to lubricate an engine''s seals comprising a pump inlet port, a pump outlet port, pumping means including a pump rotor driven at a speed proportional to engine speed for pumping oil from said pump inlet port to said pump outlet port at a rate that increases with increasing engine load, a cylindrical valve bore, a pressure controlled delivery port open to said valve bore, pressure control valve means oppositely biased by oil pressure from said pump inlet port and from said pump outlet port for providing controlled connection of said pump outlet port to said pressure controlled delivery port so that the oil pressure in said pressure controlled delivery port is dependent on the pressure developed by said pumping means and is independent of varying pressure at said pump inlet port, a pump discharge port open to said valve bore for delivering oil from said pump to lubricate the engine''s seals, a bypass port connected to said pump inlet port and open to said valve bore, said pump motor having a cylindrical valve extending into said valve bore past all of the ports open thereto, and said valve having a discharge-bypass port continuously open to said pressure controlled delivery port and alternately open to said pump discharge port and said bypass port as said valve rotates so that oil from said pressure controlled delivery port is intermittently delivered back to said pump inlet port to effect substantially uniform oil flow through said pressure controlled delivery port at substantially constant engine loads to maintain substantially uniform oil flow for seal lubrication at substantially constant engine loads.
Claim 7
Dependent Claim
304 words
An oil metering pump for metering oil to lubricate an engine''s seals comprising a pump inlet port, a pump outlet port, pumping means including a pump rotor driven at a speed proportional to engine speed for pumping oil from said pump inlet port to said pump outlet port at a rate that increases with increasing engine load, a cylindrical valve bore, a pressure controlled delivery port open to said valve bore, pressure control valve means oppositely biased by oil pressure from said pump inlet port and from said pump outlet port for providing controlled connection of said pump outlet port to said pressure controlled delivery port so that the oil pressure in said pressure controlled delivery port is dependent on the pressure developed by said pumping means and is independent of varying pressure at said pump inlet port, a pump discharge port open to said valve bore at a location axially spaced from said pressure controlled delivery port for delivering oil from said pump to lubricate the engine''s seals, a bypass port connected to said pumP inlet port and open to said valve bore at a location axially spaced from said pressure controlled delivery port and said pump discharge port, said pump rotor having a cylindrical valve extending into said valve bore past all of the ports open thereto, and said valve having a discharge-bypass port in the cylindrical surface thereof continuously open to said pressure controlled delivery port and alternately open to said pump discharge port and said bypass port as said valve rotates so that oil from said pressure controlled delivery port is intermittently delivered back to said pump inlet port to effect substantially uniform oil flow through said pressure controlled delivery port at substantially constant engine loads to maintain substantially uniform oil flow for seal lubrication at substantially constant engine loads.
Claim 8
Dependent Claim
304 words
An oil metering pump for metering oil to lubricate an engine''s seals comprising a pump inlet port, a pump outlet port, pumping means including a pump rotor driven at a speed proportional to engine speed for pumping oil from said pump inlet port to said pump outlet port at a rate that increases with increasing engine load, a cylindrical valve bore, a pressure controlled delivery port open to said valve bore, pressure control valve means oppositely biased by oil pressure from said pump inlet port and from said pump outlet port for providing controlled connection of said pump outlet port to said pressure controlled delivery port so that the oil pressure in said pressure controlled delivery port is dependent on the pressure developed by said pumping means and is independent of varying pressure at said pump inlet port, a pump discharge port open to said valve bore at a location axially spaced from said pressure controlled delivery port for delivering oil from said pump to lubricate the engine''s seals, a bypass port connected to said pumP inlet port and open to said valve bore at a location axially spaced from said pressure controlled delivery port and said pump discharge port, said pump rotor having a cylindrical valve extending into said valve bore past all of the ports open thereto, and said valve having a discharge-bypass port in the cylindrical surface thereof continuously open to said pressure controlled delivery port and alternately open to said pump discharge port and said bypass port as said valve rotates so that oil from said pressure controlled delivery port is intermittently delivered back to said pump inlet port to effect substantially uniform oil flow through said pressure controlled delivery port at substantially constant engine loads to maintain substantially uniform oil flow for seal lubrication at substantially constant engine loads.
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) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |