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US5894825A Expired / Lapsed US ⏱️ 0.0 years remaining

Engine lubrication system

Assignee: Progress Rail Locomotive Inc
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Filing: 1998-02-19
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Granted: 1999-04-20
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Expires: 2018-02-19
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Abstract

Abstract The present invention relates to a supplementary lubrication system for an internal combustion engine operable to lubricate the engine and an accessory prior to engine start-up and to lubricate the accessory after engine shut-down. The supplementary lubrication system includes an oil source in fluid communication with a supplemental oil supply conduit, which branches to define two parallel conduits, a prelube branch and a postlube branch. Disposed within the prelube branch is a prelube one-way check valve and disposed within the postlube branch is a postlube one-way check valve. The prelube branch is in fluid communication with a first end of a two-directional pump and the postlube branch is in fluid communication with a second end of the two-directional pump. During prelubrication the two-directional pump operates in a first direction to draw oil through the prelube branch and to pump oil through a prelube conduit extending from the second end of the two-directional pump, to deliver oil to the engine and the accessory. During postlubrication the two-directional pump operates in a second direction to draw oil through the postlube branch and to pump oil through a postlube conduit extending from the first end of the two-directional pump to deliver oil to the accessory.

Inventors

  • 👤 Werner Chester Duerr

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-06 12:50
CPC Classifications
F; F01; F01M; F01M5/00; F01M5/02; F01M5/025; F01M1/00; F01M1/02; F01M1/12; F01M2001/123

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 81 words
A supplemental lubrication system for an internal combustion engine operable to lubricate said engine and an accessory prior to engine start-up and to lubricate said accessory after engine shut-down comprising: an oil source, a two-directional pump, said two-directional pump operable in a first direction for prelubrication to pump oil from said oil source to said engine and to said accessory, and said two-directional pump operable in a second direction for postlubrication to pump oil from said oil source to said accessory.
Claim 2
Dependent Claim 81 words
A supplemental lubrication system for an internal combustion engine operable to lubricate said engine and an accessory prior to engine start-up and to lubricate said accessory after engine shut-down comprising: an oil source, a two-directional pump, said two-directional pump operable in a first direction for prelubrication to pump oil from said oil source to said engine and to said accessory, and said two-directional pump operable in a second direction for postlubrication to pump oil from said oil source to said accessory.
Claim 3
Dependent Claim 193 words
A supplemental lubrication system for an internal combustion engine operable to lubricate said engine prior to engine start-up and to lubricate an accessory after engine shut-down comprising: an oil source, a supplemental oil supply conduit in fluid communication with said oil source, said supplemental oil supply conduit branching to define two parallel conduits, a prelube branch and a postlube branch, disposed within said prelube branch is a prelube one-way check valve, disposed within said postlube branch is a postlube one-way check valve, said prelube branch is in fluid communication with a first end of a two-directional pump and said postlube branch is in fluid communication with a second end of said two-directional pump, during prelubrication said two-directional pump operable in a first direction to draw oil through said prelube branch and to pump oil through a prelube conduit extending from said second end of said two-directional pump, to deliver oil to said engine, during postlubrication said two-directional pump operable in a second direction to draw oil through said postlube branch and to pump oil through a postlube conduit extending from said first end of said two-directional pump to deliver oil to said accessory.
Claim 4
Dependent Claim 193 words
A supplemental lubrication system for an internal combustion engine operable to lubricate said engine prior to engine start-up and to lubricate an accessory after engine shut-down comprising: an oil source, a supplemental oil supply conduit in fluid communication with said oil source, said supplemental oil supply conduit branching to define two parallel conduits, a prelube branch and a postlube branch, disposed within said prelube branch is a prelube one-way check valve, disposed within said postlube branch is a postlube one-way check valve, said prelube branch is in fluid communication with a first end of a two-directional pump and said postlube branch is in fluid communication with a second end of said two-directional pump, during prelubrication said two-directional pump operable in a first direction to draw oil through said prelube branch and to pump oil through a prelube conduit extending from said second end of said two-directional pump, to deliver oil to said engine, during postlubrication said two-directional pump operable in a second direction to draw oil through said postlube branch and to pump oil through a postlube conduit extending from said first end of said two-directional pump to deliver oil to said accessory.
Claim 5
Dependent Claim 20 words
A supplemental lubrication system according to claim 2, wherein during prelubrication oil is delivered to said accessory for accessory prelubrication.

References Cited (Backward Citations)

US4628877A Cited
US5372219A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 2002-04-19 2002-10-19 2003-04-20 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2006-04-19 2006-10-19 2007-04-20 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2010-04-19 2010-10-19 2011-04-20 $7700.00 Window Closed / Lapsed

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