Patent US3851889A successfully refreshed from Google Patents.
US3851889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reciprocating system and hydrodynamic piston ring therefor
Assignee: Questor Corp
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Filing: 1973-02-15
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Granted: 1974-12-03
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Expires: 1993-02-15
Abstract
Abstract The disclosure embraces a reciprocating system embodying a hydrodynamic piston ring and more especially to a hydrodynamic lubricant control ring for use in reciprocating piston instrumentalities such as pistons of internal combustion engines, the piston ring embodying a novel peripheral configuration providing hydrodynamic sealing characteristics promoting the maintenance of a minimum oil film and cavitation action during piston reciprocation effecting economies in lubricant consumption without impairing lubrication at the interfacial region of the ring with a cylinder wall.
Inventors
- 👤 K Nisper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:23
CPC Classifications
F; F16; F16J; F16J9/00; F16J9/12; F16J9/20
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
90 words
A piston ring construction adapted to be mounted in an annular groove in a piston of a reciprocating system comprising a parted annular body, said body having an exterior peripheral sealing surface adjacent the mid region of the body, and said body having an exterior substantially frusto-conically shaped area below the mid region extending downwardly and inwardly from the peripheral sealing surface defining a zone for promoting cavitation in said zone during reciprocatory movements of the piston, said frusto-conically shaped area having recesses therein for establishing turbulence in said zone.
Claim 2
Dependent Claim
90 words
A piston ring construction adapted to be mounted in an annular groove in a piston of a reciprocating system comprising a parted annular body, said body having an exterior peripheral sealing surface adjacent the mid region of the body, and said body having an exterior substantially frusto-conically shaped area below the mid region extending downwardly and inwardly from the peripheral sealing surface defining a zone for promoting cavitation in said zone during reciprocatory movements of the piston, said frusto-conically shaped area having recesses therein for establishing turbulence in said zone.
Claim 3
Dependent Claim
90 words
A piston ring construction adapted to be mounted in an annular groove in a piston of a reciprocative system comprising a parted annular body, said body having an exterior peripheral sealing surface, and said body having an exterior substantially frusto-conically shaped contour adjacent the sealing surface extending downwardly and inwardly from the peripheral sealing surface defining a zone for promoting cavitation in said zone during reciprocatory movements of the piston, the frusto-conically shaped contour being configurated with peripheral recesses and projections for establishing turbulence during reciprocatory movements of the ring.
Claim 4
Dependent Claim
90 words
A piston ring construction adapted to be mounted in an annular groove in a piston of a reciprocative system comprising a parted annular body, said body having an exterior peripheral sealing surface, and said body having an exterior substantially frusto-conically shaped contour adjacent the sealing surface extending downwardly and inwardly from the peripheral sealing surface defining a zone for promoting cavitation in said zone during reciprocatory movements of the piston, the frusto-conically shaped contour being configurated with peripheral recesses and projections for establishing turbulence during reciprocatory movements of the ring.
Claim 5
Dependent Claim
70 words
A piston ring construction adapted to be mounted in an annular groove in a piston of a reciprocating system comprising a parted annular body, said body having an exterior peripheral sealing portion, said body having circumferential surfaces of progressively decreasing diameters downwardly of the peripheral sealing portion of the ring, the peripheral regions of said circumferential surfaces defining a relief zone for promoting cavitation during reciprocatory movements of the piston.
Claim 6
Dependent Claim
70 words
A piston ring construction adapted to be mounted in an annular groove in a piston of a reciprocating system comprising a parted annular body, said body having an exterior peripheral sealing portion, said body having circumferential surfaces of progressively decreasing diameters downwardly of the peripheral sealing portion of the ring, the peripheral regions of said circumferential surfaces defining a relief zone for promoting cavitation during reciprocatory movements of the piston.
Claim 7
Dependent Claim
84 words
A piston ring construction adapted to be mounted in an annular groove in a piston of a reciprocating system comprising a parted annular body, said body having an exterior peripheral sealing portion, said body having an exterior substantially frusto-conically shaped area adjacent the peripheral sealing portion of the body, said frusto-conically shaped area having a plurality of circumferential recesses of progressively decreasing peripheral dimensions downwardly of the piston ring, said recesses defining a zone adapted to establish cavitation during reciprocatory movements of the piston.
Claim 8
Dependent Claim
84 words
A piston ring construction adapted to be mounted in an annular groove in a piston of a reciprocating system comprising a parted annular body, said body having an exterior peripheral sealing portion, said body having an exterior substantially frusto-conically shaped area adjacent the peripheral sealing portion of the body, said frusto-conically shaped area having a plurality of circumferential recesses of progressively decreasing peripheral dimensions downwardly of the piston ring, said recesses defining a zone adapted to establish cavitation during reciprocatory movements of the piston.
Claim 9
Dependent Claim
21 words
The piston ring construction according to claim 4 wherein each of the circumferential recesses is of curved configuration in cross section.
Claim 10
Dependent Claim
95 words
A reciprocating system having a piston reciprocable in a cylinder involving a lubricating fluid, the piston being equipped with a one-piece parted ring having a peripheral sealing surface, said ring having a frusto-conically shaped circumferential configuration adjacent the peripheral sealing surface extending downwardly and inwardly from the peripheral sealing surface defining with the cylinder an annular zone for promoting cavitation during reciprocatory movements of the piston to establish flow of lubricating fluid predominately in one direction of reciprocation of the piston, said frusto-conically shaped configuration having recesses therein for establishing turbulence in said annular zone.
Claim 11
Dependent Claim
95 words
A reciprocating system having a piston reciprocable in a cylinder involving a lubricating fluid, the piston being equipped with a one-piece parted ring having a peripheral sealing surface, said ring having a frusto-conically shaped circumferential configuration adjacent the peripheral sealing surface extending downwardly and inwardly from the peripheral sealing surface defining with the cylinder an annular zone for promoting cavitation during reciprocatory movements of the piston to establish flow of lubricating fluid predominately in one direction of reciprocation of the piston, said frusto-conically shaped configuration having recesses therein for establishing turbulence in said annular zone.
Claim 12
Dependent Claim
98 words
A reciprocating system having a piston reciprocable in a cylinder involving a lubricating fluid, a one-piece parted compression ring mounted by the piston having a peripheral sealing surface, a generally frusto-conically shaped circumferential contour on a lower exterior portion of the ring, said frusto-conically shaped contour extending downwardly and inwardly from the peripheral sealing surface defining with the cylinder an annular zone for promoting cavitation during reciprocatory movements of the piston to influence flow of lubricant in one direction during reciprocation of the piston, said frusto-conically shaped contour having recesses therein for establishing turbulence in the annular zone.
Claim 13
Dependent Claim
98 words
A reciprocating system having a piston reciprocable in a cylinder involving a lubricating fluid, a one-piece parted compression ring mounted by the piston having a peripheral sealing surface, a generally frusto-conically shaped circumferential contour on a lower exterior portion of the ring, said frusto-conically shaped contour extending downwardly and inwardly from the peripheral sealing surface defining with the cylinder an annular zone for promoting cavitation during reciprocatory movements of the piston to influence flow of lubricant in one direction during reciprocation of the piston, said frusto-conically shaped contour having recesses therein for establishing turbulence in the annular zone.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |