Patent US4373483A successfully refreshed from Google Patents.
US4373483A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating oil pump drive for an internal combustion engine
Assignee: Case Poclain Corp Ltd
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Filing: 1981-03-03
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Granted: 1983-02-15
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Expires: 2001-03-03
Abstract
Abstract Lubricating oil pumps for internal combustion engines have hitherto had individual drive means such as a pair of skew gears. To simplify and cheapen the pump drive means, the pump is of the internal gear type and is driven by and housed within an idler gear driveably connecting the crankshaft to the camshaft. The pump body is rigidly secured to the engine and has a cylindrical periphery on which the idler gear is journalled, and the externally-toothed inner gear of the pump is driveably connected to the idler gear by a coupling sleeve.
Inventors
- 👤 Cecil T. Bury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:10
CPC Classifications
F; F04; F04C; F04C15/00; F04C15/0057; F04C15/0061; F01; F01M; F01M1/00; F01M1/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
42 words
An internal combustion engine having a train of toothed gears including an idler gear driveably connecting its crankshaft to its camshaft, wherein its lubricating oil pump is of the internal gear type and is housed within and driven by said idler gear.
Claim 2
Dependent Claim
42 words
An internal combustion engine having a train of toothed gears including an idler gear driveably connecting its crankshaft to its camshaft, wherein its lubricating oil pump is of the internal gear type and is housed within and driven by said idler gear.
Claim 3
Dependent Claim
23 words
An internal combustion engine according to claim 1, wherein suction and delivery conduits for the oil pump are formed in the engine casing.
Claim 4
Dependent Claim
41 words
An internal combustion engine according to claim 1, wherein a relief valve capable of returning oil from the outlet side to the inlet side of the oil pump is disposed on that side of said pump remote from the engine casing.
Claim 5
Dependent Claim
32 words
An internal combustion engine according to claim 1, wherein the oil pump includes a body rigidly secured to the engine and having a cylindrical periphery on which the idler gear is journalled.
Claim 6
Dependent Claim
27 words
An internal combustion engine according to claim 1, wherein the oil pump includes an externally-toothed inner gear driveably connected to the idler gear by a coupling member.
References Cited (Backward Citations)
US3384063A
Cited
US3643642A
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US3781137A
Cited
US4334836A
Cited
US4295807A
Cited
US4334508A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-14 | 1986-08-16 | 1987-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-14 | 1990-08-16 | 1991-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-14 | 1994-08-16 | 1995-02-15 | $7700.00 | Window Closed / Lapsed |