US4945864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two cycle engine piston lubrication
Assignee: Motors Liquidation Co
•
Filing: 1989-06-21
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Granted: 1990-08-07
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Expires: 2009-06-21
Abstract
Abstract A two cycle engine has oil distribution means through the cylinder wall to feed internal oil passages in the associated piston that distribute oil directly to the skirt and cylinder walls, preferably between ports, and/or to the wrist pin and connecting rod bearing to thereby limit oil carryover into the engine charging and scavenging air.
Inventors
- 👤 James G. Solomon
- 👤 Chester J. Rivard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:02
CPC Classifications
F; F02; F02F; F02F1/00; F02F1/18; F02F1/22; F01; F01M; F01M1/00; F01M1/08; F16; F16J; F16J1/00; F16J1/08; F01M2001/083; F02B; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
105 words
An internal combustion engine having in combination a cylinder having circumferentially spaced inlet and exhaust ports and a piston reciprocable in the cylinder, the piston having a cylinder engaging skirt and wherein the improvements comprise oil distribution means in and opening to the interior of the cylinder at a location circumferentially intermediate said ports for delivering lubricant to the cylinder interior, and oil passage means in the piston and opening through the skirt of the piston in circumferential alignment with said oil distribution means for receiving lubricant therefrom during communication therewith and said passage means directly communicating with lubrication requiring means associated with the piston.
Claim 2
Dependent Claim
105 words
An internal combustion engine having in combination a cylinder having circumferentially spaced inlet and exhaust ports and a piston reciprocable in the cylinder, the piston having a cylinder engaging skirt and wherein the improvements comprise oil distribution means in and opening to the interior of the cylinder at a location circumferentially intermediate said ports for delivering lubricant to the cylinder interior, and oil passage means in the piston and opening through the skirt of the piston in circumferential alignment with said oil distribution means for receiving lubricant therefrom during communication therewith and said passage means directly communicating with lubrication requiring means associated with the piston.
Claim 3
Dependent Claim
32 words
A piston as in claim 1 wherein said passage means opens through the skirt at another location for delivering lubricant to the skirt surface for lubricating reciprocating motion thereof within said cylinder.
Claim 4
Dependent Claim
37 words
A piston as in claim 1 wherein said passage means communicates with a bearing within the piston for lubricating the bearing under loaded conditions and during relative oscillating motion between the piston and an associated connecting rod.
Claim 5
Dependent Claim
25 words
A piston as in claim 3 wherein the bearing comprises a needle bearing acting between the associated connecting rod and a piston carried wrist pin.
References Cited (Backward Citations)
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Cited
US3494262A
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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) | 1993-08-06 | 1994-02-05 | 1994-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-06 | 1998-02-05 | 1998-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-06 | 2002-02-05 | 2002-08-07 | $7700.00 | Window Closed / Lapsed |