US4436067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine driven pump arrangement
Assignee: Bayerische Motoren Werke AG
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Filing: 1981-11-24
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Granted: 1984-03-13
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Expires: 2001-11-24
Abstract
Abstract An internal combustion engine includes a drive connection for auxiliary equipment. The equipment includes a step-down gear and a pump impeller of a coolant pump and a pump wheel of a lubricating oil gear pump situated on a common shaft. The drive connection of the engine is characterized in that pump wheels of the lubricating oil gear pump form the step-down gear for the coolant pump.
Inventors
- 👤 Josef Fritzenwenger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:46
CPC Classifications
F; F02; F02B; F02B67/00; F02B67/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
58 words
An internal combustion engine comprising a drive connection for a pump assembly wherein the assembly includes a step-down gear, a pump impeller of a coolant pump and a pump wheel of a lubricating oil gear pump situated on a common shaft, wherein pump wheels of the lubricating oil gear pump form the step-down gear for the coolant pump.
Claim 2
Dependent Claim
58 words
An internal combustion engine comprising a drive connection for a pump assembly wherein the assembly includes a step-down gear, a pump impeller of a coolant pump and a pump wheel of a lubricating oil gear pump situated on a common shaft, wherein pump wheels of the lubricating oil gear pump form the step-down gear for the coolant pump.
Claim 3
Dependent Claim
66 words
An internal combustion engine according to claim 1, wherein the drive connection further comprises a secondary drive shaft driven by the crankshaft of the engine, wherein the pump wheels forming said step-down gear include a drive pump wheel of the lubricating oil gear pump which is situated coaxially relative to said secondary drive shaft and is connected to said secondary drive shaft by male coupling means.
Claim 4
Dependent Claim
91 words
An internal combustion engine according to claim 1 or 2, wherein the lubricating oil gear pump and the coolant pump are located in a common pump housing at a face of a housing of the internal combustion engine, and the pump wheels of the lubricating oil gear pump are recessed in said pump housing such that the faces of the pump wheels face towards the housing of the internal combustion engine, a mounting pad of the pump housing and a flange facing of said engine housing lie in the same plane.
Claim 5
Dependent Claim
34 words
An internal combustion engine according to claim 3, including an inlet chamber of the coolant pump situated in the pump housing between the lubricating oil gear pump and the impeller of the coolant pump.
Claim 6
Dependent Claim
70 words
A pump arrangement for an internal combustion engine comprising a lubricating oil pump having a plurality of pump wheels and a coolant pump having an impeller, one wheel of said plurality is aligned with and driven by a drive associated with said engine, another wheel of said plurality and said impeller are mounted on a common shaft, said plurality of wheels forming a step-down gear arrangement for driving said impeller.
Claim 7
Dependent Claim
70 words
A pump arrangement for an internal combustion engine comprising a lubricating oil pump having a plurality of pump wheels and a coolant pump having an impeller, one wheel of said plurality is aligned with and driven by a drive associated with said engine, another wheel of said plurality and said impeller are mounted on a common shaft, said plurality of wheels forming a step-down gear arrangement for driving said impeller.
Claim 8
Dependent Claim
56 words
A pump arrangement as set forth in claim 5, wherein said one wheel is driven by said drive through a drive connection, said drive connection including a secondary drive shaft driven by the crankshaft of the engine and a releasable coupling menas for transmitting the driving force of the secondary drive shaft to said one wheel.
Claim 9
Dependent Claim
24 words
A pump arrangement as set forth in claim 5, wherein said lubricating pump and said coolant pump are located in a common pump housing.
Claim 10
Dependent Claim
27 words
A pump arrangement as set forth in claim 7, wherein said plurality of pump wheels are recessed in a face of said housing which faces said engine.
Claim 11
Dependent Claim
34 words
A pump arrangement as set forth in claim 7, including an inlet chamber for the coolant pump situated in the pump housing between the lubricating oil pump and the impeller of the coolant pump.
Claim 12
Dependent Claim
24 words
A pump arrangement as set forth in claim 6, wherein said lubricating pump and said coolant pump are located in a common pump housing.
Claim 13
Dependent Claim
32 words
A pump arrangement as set forth in claim 10, wherein said lubricating oil pump, said coolant pump, and said housing form an assembly which is separable from said engine as a unit.
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) | 1987-03-13 | 1987-09-12 | 1988-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-13 | 1991-09-12 | 1992-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-13 | 1995-09-12 | 1996-03-13 | $7700.00 | Window Closed / Lapsed |