US4268042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible bellows piston seal
Assignee: Individual
•
Filing: 1980-05-08
•
Granted: 1981-05-19
•
Expires: 2000-05-08
Abstract
Abstract Means and method are provided for utilizing a piston and cylinder combination eliminating the usual sealing and oil rings and their accompanying friction and replacing them with ball bearings which in the principal embodiment are captured in splitring cages which are snapped into the existing grooves of the piston. Having thus lost the sealing ability of the piston, an accordion-type diaphram is utilized in the top of the cylinder to define the compression or combustion chamber.
Inventors
- 👤 Albert G. Borlan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:53
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/50; F16J15/52
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
53 words
A piston and cylinder comprising: (a) a piston having a plurality of circumferential slots; (b) a plurality of bearings seated in said slots to bear on said cylinder; and (c) a continuous accordion baffle being expansible and contractable longitudinally in said cylinder and defining an expansion chamber with the head of said cylinder.
Claim 2
Dependent Claim
53 words
A piston and cylinder comprising: (a) a piston having a plurality of circumferential slots; (b) a plurality of bearings seated in said slots to bear on said cylinder; and (c) a continuous accordion baffle being expansible and contractable longitudinally in said cylinder and defining an expansion chamber with the head of said cylinder.
Claim 3
Dependent Claim
18 words
Structure according to claim 1 wherein said baffle is substantially frustoconical to promote proper seating of accordion convolutions.
Claim 4
Dependent Claim
31 words
Structure according to claim 1 wherein said piston comprises an existing internal combustion engine piston and said slots comprise the sealing ring grooves and oil ring groove of said existing piston.
Claim 5
Dependent Claim
43 words
Structure according to claim 3 wherein said baffle has an end wall to bear against the top of said piston and at the opposite end thereof an outwardly extended radial flange to engage between the head of said cylinder and the cylinder-defining block.
Claim 6
Independent Claim
121 words
A method of converting an internal combustion engine or pump device having a cylinder head, a cylinder, a piston operative in said cylinder and having circumferential grooves defined in the piston and seating rings in said grooves defining a sliding seal with said cylinder and defining a compression chamber above said piston, to a piston device using roller bearings, comprising the following steps; (a) removing the cylinder head; (b) removing the piston; (c) inserting an expansible diaphram into said cylinder head from the head end thereof and sealing same with said head by the remounting thereof; (d) removing the rings from said grooves in said piston; (e) inserting roller bearings in said grooves; and (f) replacing said pistons in said cylinder.
Claim 7
Independent Claim
121 words
A method of converting an internal combustion engine or pump device having a cylinder head, a cylinder, a piston operative in said cylinder and having circumferential grooves defined in the piston and seating rings in said grooves defining a sliding seal with said cylinder and defining a compression chamber above said piston, to a piston device using roller bearings, comprising the following steps; (a) removing the cylinder head; (b) removing the piston; (c) inserting an expansible diaphram into said cylinder head from the head end thereof and sealing same with said head by the remounting thereof; (d) removing the rings from said grooves in said piston; (e) inserting roller bearings in said grooves; and (f) replacing said pistons in said cylinder.
Claim 8
Dependent Claim
24 words
Structure according to claim 5 wherein said bearings are captured in split ring cages and step (d) comprises snapping said cages into said grooves.
Claim 9
Dependent Claim
62 words
Structure according to claim 5 wherein said diaphram comprises a two-ended frustoconical accordion-walled diaphram with an end wall defined at one end to bear against the top of said cylinder and a radial flange extending from the other end, and step (c) comprises inserting said accordion walled diaphram into said cylinder and capturing said flange between said head and said cylinder block.
References Cited (Backward Citations)
US1757997A
Cited
US2021156A
Cited
FR833244A
Cited
US2791372A
Cited
US2712483A
Cited
FR1112743A
Cited
US2915046A
Cited
US3008294A
Cited
DE1952065A1
Cited
CA971530A
Cited
DE2333432A1
Cited
DE2901138A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-05-18 | 1984-11-17 | 1985-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-18 | 1988-11-17 | 1989-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-18 | 1992-11-17 | 1993-05-19 | $7700.00 | Window Closed / Lapsed |