US5201805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wear reducing piston for combustion engine
Assignee: Individual
•
Filing: 1992-04-06
•
Granted: 1993-04-13
•
Expires: 2012-04-06
Abstract
Abstract The reduction of wear at the cylinder walls of combustion engines is achieved by a new type of piston with special channels and facilities for collecting lubricants and distributing the lubricants during the piston movement and especially during the first cycles onto areas of highest wear of the cylinder wall.
Inventors
- 👤 Hans Schubert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:14
CPC Classifications
F; F16; F16J; F16J1/00; F16J1/08; F02; F02F; F02F3/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
99 words
A wear reducing piston for a cylinder of an internal combustion engine having a crankshaft, and a connecting rod, said connecting rod moving during operation in a plane, said piston comprising a top, a cylindrical body, an inner open space, a wrist pin for linking said piston to said connecting rod of said engine and an oil ring; a plurality of lubrication channels located substantially symmetrical to said plane in said piston wall for guiding lubricants through said body and ejecting lubricants below said oil ring directly against the wall of said cylinder in close vicinity to said plane.
Claim 2
Dependent Claim
99 words
A wear reducing piston for a cylinder of an internal combustion engine having a crankshaft, and a connecting rod, said connecting rod moving during operation in a plane, said piston comprising a top, a cylindrical body, an inner open space, a wrist pin for linking said piston to said connecting rod of said engine and an oil ring; a plurality of lubrication channels located substantially symmetrical to said plane in said piston wall for guiding lubricants through said body and ejecting lubricants below said oil ring directly against the wall of said cylinder in close vicinity to said plane.
Claim 3
Dependent Claim
71 words
A wear reducing piston for a cylinder of an internal combustion engine as claimed in claim 1, further comprising a reservoir for lubricants located in the wall of said piston; an opening in said piston wall for guiding oil received from said cylinder wall into said reservoir; said lubrication channels in said pistion wall guiding lubricants from said reservoir through said body and ejecting lubricants against the wall of said cylinder.
Claim 4
Dependent Claim
30 words
A wear reducing piston as claimed in claim 2, wherein said reservoir including a recessed trough in said wall of said piston and open to the inside of said piston.
Claim 5
Dependent Claim
22 words
A wear reducing piston as claimed in claim 1, wherein said channels are located symmetrically to the plane of said connecting rod.
Claim 6
Dependent Claim
22 words
A wear reducing piston as claimed in claim 2, wherein said channels are located symmetrically to the plane of said connecting rod.
Claim 7
Dependent Claim
45 words
A wear reducing piston as claimed in claim 4 wherein said piston includes piston rings and an oil ring, and wherein said channels end on said outer wall of said piston in a plane substantially parallel to said oil ring and in close proximity thereto.
Claim 8
Dependent Claim
22 words
A wear reducing piston as claimed in claim 6 wherein said channels penetrate the outer wall of said piston in radial direction.
Claim 9
Dependent Claim
28 words
A wear reducing piston as claimed in claim 6 wherein said channels penetrate the outer wall of said piston in a radial upward direction to said outer wall.
Claim 10
Dependent Claim
27 words
A wear reducing piston a claimed in claim 5 wherein said channels penetrate said outer wall pair wise under different angles to the circumference of said piston.
Claim 11
Dependent Claim
54 words
A wear reducing piston a claimed in claim 5, said piston being linked to a connecting rod, said connecting rod moving during operation in a plane, wherein said channels penetrate said outer wall pair wise under different angles, said penetration being pair wise oriented towards the plane of the movement of said connecting rod.
Claim 12
Dependent Claim
93 words
A wear reducing piston for a cylinder of an internal combustion engine as claimed in claim 1, said piston being linked to a connecting rod, said connecting rod moving during operation in a plane, said piston further comprising a reservoir for lubricants located substantially symmetrical to said plane at the lower end in the wall of said piston and having an opening to the outer surface of said piston; a reservoir having a concave bottom for collecting lubricant and a convex top for guiding collected lubricant towards the outside surface of said piston.
Claim 13
Dependent Claim
36 words
A wear reducing piston for a cylinder of an internal combustion engine as claimed in claim 11, wherein said reservoir collects lubricant from the inside of said piston for ejection towards said wall of said cylinder.
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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) | 1996-04-12 | 1996-10-12 | 1997-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-12 | 2000-10-12 | 2001-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-12 | 2004-10-12 | 2005-04-13 | $7700.00 | Window Closed / Lapsed |