Patent US3885801A successfully refreshed from Google Patents.
US3885801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Packing
Assignee: Parker Hannifin Corp
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Filing: 1974-05-15
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Granted: 1975-05-27
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Expires: 1994-05-15
Abstract
Abstract A seal ring assembly for sealing in two directions, comprising an elastomeric seal ring with a pair of lips, solid elastomeric loading ring between the lips, and a pressure inverting pedestal ring active on the loading ring such that when fluid pressure is behind the pedestal ring the fluid pressure bypasses the pedestal ring and acts on the loading ring to deform the same to press the lips into sealing engagement with the members, and when fluid pressure is behind the seal ring the latter pushes the loading ring against the pedestal ring to likewise cause the loading ring to deform and press the lips into sealing engagement with the members.
Inventors
- 👤 John B Scannell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:27
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3204; F16J15/3232; F16J15/3236; F16J15/3208; F16J15/46; F16J15/48; Y; Y10; Y10S; Y10S277/00; Y10S277/91
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
218 words
A sealing arrangement including two telescoped members, one of said members having a groove therein with a bottom wall radially opposite the other member, the groove having opposed end walls, one of said end walls having an axially projecting annular portion of less radial thickness than said groove, said one end wall being shaped to provide an annular space on each side of the projecting portion, a sealing assembly within said groove and comprising a sealing ring and a loading ring, the sealing ring comprising a body having inner and outer lips extending from one end thereof and defining an annular groove therebetween with an open end of substantially the same width as said projecting portion, each lip having a free end, said loading ring being within and initially substantially filling said annular groove and having an exposed end engageable with said projecting portion, said exposed end being initially substantially flush with the free ends of said lips, and said sealing and loading rings being made of deformable materials whereby upon fluid pressure being applied to the assembly from the other end of said body said projecting portion will enter the annular groove to deform the loading ring and sealing ring while confining the loading ring completely within said annular groove, and said lips will enter said spaces.
Claim 2
Dependent Claim
218 words
A sealing arrangement including two telescoped members, one of said members having a groove therein with a bottom wall radially opposite the other member, the groove having opposed end walls, one of said end walls having an axially projecting annular portion of less radial thickness than said groove, said one end wall being shaped to provide an annular space on each side of the projecting portion, a sealing assembly within said groove and comprising a sealing ring and a loading ring, the sealing ring comprising a body having inner and outer lips extending from one end thereof and defining an annular groove therebetween with an open end of substantially the same width as said projecting portion, each lip having a free end, said loading ring being within and initially substantially filling said annular groove and having an exposed end engageable with said projecting portion, said exposed end being initially substantially flush with the free ends of said lips, and said sealing and loading rings being made of deformable materials whereby upon fluid pressure being applied to the assembly from the other end of said body said projecting portion will enter the annular groove to deform the loading ring and sealing ring while confining the loading ring completely within said annular groove, and said lips will enter said spaces.
Claim 3
Dependent Claim
23 words
The assembly of claim 1 in which said exposed end is convex and said projection is concave where it engages said loading ring.
Claim 4
Dependent Claim
171 words
A sealing assembly for use between two members, comprising a deformable sealing ring, a deformable loading ring, and a pedestal ring, said sealing ring having radially inner and outer lips defining an annular groove therebetween, said loading ring being in said groove and substantially filling the same, said pedestal ring having an annular projection engageable with the loading ring for deforming the same, the free end of each lip having an inner corner adjacent the annular groove, and an outer corner spaced from the annular groove, the pedestal ring having cutaway portions on opposite sides of said projection, said inner corners being engageable with the projection of the pedestal ring to completely close said annular groove when fluid pressure is applied to the end of the sealing ring opposite the lips and causes deformation of said sealing and loading rings, and said outer corners being shaped to remain out of contact with said pedestal ring and said lips substantially completely filling said cutaway portions when fluid pressure is applied as aforesaid.
Claim 5
Dependent Claim
171 words
A sealing assembly for use between two members, comprising a deformable sealing ring, a deformable loading ring, and a pedestal ring, said sealing ring having radially inner and outer lips defining an annular groove therebetween, said loading ring being in said groove and substantially filling the same, said pedestal ring having an annular projection engageable with the loading ring for deforming the same, the free end of each lip having an inner corner adjacent the annular groove, and an outer corner spaced from the annular groove, the pedestal ring having cutaway portions on opposite sides of said projection, said inner corners being engageable with the projection of the pedestal ring to completely close said annular groove when fluid pressure is applied to the end of the sealing ring opposite the lips and causes deformation of said sealing and loading rings, and said outer corners being shaped to remain out of contact with said pedestal ring and said lips substantially completely filling said cutaway portions when fluid pressure is applied as aforesaid.
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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) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |