Patent EP0089695A2 successfully refreshed from Google Patents.
Patent US4527520A successfully refreshed from Google Patents.
US4527520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubrication of an ancillary pump fitted to an engine
Assignee: Delphi Technologies Inc
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Filing: 1984-01-16
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Granted: 1985-07-09
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Expires: 2004-01-16
Abstract
Abstract In combination with an internal combustion engine having a crankcase in which an air/oil mist mixture exists during normal operation of the engine, a pump having a crankshaft journalled in a crankcase, a cylinder, a piston coupled to said crankshaft to reciprocate in the cylinder, an intake and a return passage each communicating the pump crankcase with said engine compartment, and one-way valves in each of said passages arranged so that reciprocation of the pump piston will circulate the air/oil mist mixture from the engine compartment through the pump crankcase to provide lubrication to the compressor crankshaft and piston.
Inventors
- 👤 John W. Koch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:19
CPC Classifications
F; F01; F01M; F01M9/00; F01M9/10; F01M9/108
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
111 words
In combination with an internal combustion engine having a compartment in which an air/oil mist mixture exists during normal operation of the engine, a pump having a crankshaft journalled in a crankcase, a cylinder, a piston coupled to said crankshaft to reciprocate in the cylinder, means connecting the pump crankshaft to the engine for driving the pump by the engine, an intake and a return passage each communicating the pump crankcase with said engine compartment, respective valves in said passages arranged so that reciprocation of the pump piston will circulate the air/oil mist mixture from the engine compartment through the pump crankcase to provide lubrication to the pump crankshaft and piston.
Claim 2
Dependent Claim
111 words
In combination with an internal combustion engine having a compartment in which an air/oil mist mixture exists during normal operation of the engine, a pump having a crankshaft journalled in a crankcase, a cylinder, a piston coupled to said crankshaft to reciprocate in the cylinder, means connecting the pump crankshaft to the engine for driving the pump by the engine, an intake and a return passage each communicating the pump crankcase with said engine compartment, respective valves in said passages arranged so that reciprocation of the pump piston will circulate the air/oil mist mixture from the engine compartment through the pump crankcase to provide lubrication to the pump crankshaft and piston.
Claim 3
Dependent Claim
15 words
The combination as claimed in claim 1, wherein each said valve is a one-way valve.
Claim 4
Dependent Claim
15 words
The combination as claimed in claim 1, wherein each said valve is a reed valve.
Claim 5
Dependent Claim
17 words
The combination as claimed in claim 1, wherein the compartment of the engine is an engine crankcase.
Claim 6
Dependent Claim
17 words
The combination as claimed in claim 2, wherein the compartment of the engine is an engine crankcase.
Claim 7
Dependent Claim
17 words
The combination as claimed in claim 3, wherein the compartment of the engine is an engine crankcase.
Claim 8
Dependent Claim
144 words
The combination of an internal combustion engine having an engine crankcase in which an air/oil mist exists during normal operation of the engine and an engine crankshaft journalled in the engine crankcase, and a pump having a pump crankcase, a pump crankshaft journalled in the pump crankcase, a cylinder, a pump piston coupled to the pump crankshaft to reciprocate in the cylinder, drive means for driving the pump crankshaft by the engine crankshaft, a mist intake passage and a mist return passage each communicating the engine crankcase with the pump crankcase, and one-way valve means located in said passages for circulating the air/oil mist from the engine crankcase through the mist intake passage to the pump crankcase and through the mist return passage back to the engine crankcase for providing lubrication to the pump crankshaft and pump piston upon reciprocation of the pump piston.
Claim 9
Dependent Claim
144 words
The combination of an internal combustion engine having an engine crankcase in which an air/oil mist exists during normal operation of the engine and an engine crankshaft journalled in the engine crankcase, and a pump having a pump crankcase, a pump crankshaft journalled in the pump crankcase, a cylinder, a pump piston coupled to the pump crankshaft to reciprocate in the cylinder, drive means for driving the pump crankshaft by the engine crankshaft, a mist intake passage and a mist return passage each communicating the engine crankcase with the pump crankcase, and one-way valve means located in said passages for circulating the air/oil mist from the engine crankcase through the mist intake passage to the pump crankcase and through the mist return passage back to the engine crankcase for providing lubrication to the pump crankshaft and pump piston upon reciprocation of the pump piston.
Claim 10
Dependent Claim
15 words
The combination as claimed in claim 7, wherein said one-way valve means are reed valves.
Claim 11
Independent Claim
145 words
A method of lubricating a pump associated with an internal combustion engine having an engine crankcase in which an air/oil mist exists during normal engine operation, and an engine crankshaft journalled in the engine crankcase, said pump including a pump crankcase, a pump crankshaft journalled in the pump crankcase, a cylinder, a pump piston coupled to the pump crankshaft to reciprocate in the cylinder and drive means for driving the pump crankshaft by the engine crankshaft, said method comprising circulating the air/oil mist from the engine crankcase through an inlet passage and associated inlet one-way valve to the pump crankcase to lubricate the pump crankshaft and pump piston by variations in pressure created in the pump crankcase by reciprocation of the pump piston and returning the air/oil mist from the pump crankcase through a return passage and associated return one-way valve to the engine crankcase.
Claim 12
Independent Claim
145 words
A method of lubricating a pump associated with an internal combustion engine having an engine crankcase in which an air/oil mist exists during normal engine operation, and an engine crankshaft journalled in the engine crankcase, said pump including a pump crankcase, a pump crankshaft journalled in the pump crankcase, a cylinder, a pump piston coupled to the pump crankshaft to reciprocate in the cylinder and drive means for driving the pump crankshaft by the engine crankshaft, said method comprising circulating the air/oil mist from the engine crankcase through an inlet passage and associated inlet one-way valve to the pump crankcase to lubricate the pump crankshaft and pump piston by variations in pressure created in the pump crankcase by reciprocation of the pump piston and returning the air/oil mist from the pump crankcase through a return passage and associated return one-way valve to the engine crankcase.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-08 | 1989-01-07 | 1989-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-08 | 1993-01-07 | 1993-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-08 | 1997-01-07 | 1997-07-09 | $7700.00 | Window Closed / Lapsed |