US3764148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary mechanical fluid seal
Assignee: EG&G Sealol Inc
•
Filing: 1972-01-26
•
Granted: 1973-10-09
•
Expires: 1992-01-26
Abstract
Abstract A rotary mechanical fluid seal for use in high pressure and/or high temperature environments, comprising a unitary structure adapted to cooperate with a rotating member and consisting of a cup having an inner shell with a shaft opening, a primary sealing ring having a sealing face engageable with a rotating member and slidably mounted in said housing, a secondary sealing element, fabricated from semi-resilient material, slidably engaging said primary sealing ring in fluid tight relationship and slidably engaging the inner shell or shaft in fluid tight relationship.
Inventors
- 👤 J Mullaney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:39
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/38; F16J15/32; F16J15/3268; F16J15/3284; F16J15/3464; F16J15/348; F16J15/56; Y; Y10; Y10S; Y10S277/00; Y10S277/935; Y10S277/944; Y10S277/945; Y10S277/946
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
223 words
A rotaRy mechanical fluid seal unitary structure comprising a cup consisting of an outer shell and inner shell to provide a chamber, said inner shell having a shaft opening, a key fastened to said outer shell and projecting into said chamber, a primary sealing ring consisting of a circular disk body provided with a circular collar having an inner shell opening, a circular sealing seat, a sealing face and a keyway adapted to engage said key located within said chamber with said sealing face projecting beyond said chamber, a secondary sealing element comprising a hollow gland having a lower step and an integral upper step, said lower step having a lower sealing surface, said upper step having an upper sealing surface, said upper sealing surface engaging said circular collar, resilient means yieldingly urging said upper sealing surface against said circular collar, said lower sealing surface engaging said inner shell, means yieldingly urging said lower sealing surface against said inner shell, a retainer comprising an outer wall, a rear wall integrally connected to said outer wall and provided with an axial opening to accommodate said inner shell, said outer wall and rear wall forming a cavity, said cavity housing said secondary sealing element, and resilient means interposed between said back wall and said rear wall to yieldingly urge said sealing face beyond said chamber.
Claim 2
Dependent Claim
223 words
A rotaRy mechanical fluid seal unitary structure comprising a cup consisting of an outer shell and inner shell to provide a chamber, said inner shell having a shaft opening, a key fastened to said outer shell and projecting into said chamber, a primary sealing ring consisting of a circular disk body provided with a circular collar having an inner shell opening, a circular sealing seat, a sealing face and a keyway adapted to engage said key located within said chamber with said sealing face projecting beyond said chamber, a secondary sealing element comprising a hollow gland having a lower step and an integral upper step, said lower step having a lower sealing surface, said upper step having an upper sealing surface, said upper sealing surface engaging said circular collar, resilient means yieldingly urging said upper sealing surface against said circular collar, said lower sealing surface engaging said inner shell, means yieldingly urging said lower sealing surface against said inner shell, a retainer comprising an outer wall, a rear wall integrally connected to said outer wall and provided with an axial opening to accommodate said inner shell, said outer wall and rear wall forming a cavity, said cavity housing said secondary sealing element, and resilient means interposed between said back wall and said rear wall to yieldingly urge said sealing face beyond said chamber.
Claim 3
Dependent Claim
32 words
A rotary mechanical fluid seal according to claim 1 in which said secondary sealing element is fabricated from a resine compound composed of fluorine and carbon such as polytetrafluoroethylene or fluorinated ethylenepropylene.
Claim 4
Dependent Claim
172 words
A fluid seal comprising a retainer having an outer wall, a rear wall integrally connected to said outer wall and provided with an axial opening, said outer wall and rear wall forming a cavity, a sealing element comprising a hollow gland fabricated from semi-resilient material and having a lower step and an integral upper step, said lower step having a lower sealing surface, said upper step having an upper sealing surface, a ring consisting of a circular disk body provided with a circular collar having a central shaft opening, a circular sealing seat located on the outside surface of said circular collar, said upper sealing surface engaging said circular sealing seat, said sealing ring and said hollow gland located within said cavity, a first garter spring located around said lower step to provide a yielding constrictive force, a second garter spring located around said upper step to provide a yielding constrictive force, to thereby provide a unitary sealing structure about a shaft when said lower step is in engagement with a shaft.
Claim 5
Dependent Claim
172 words
A fluid seal comprising a retainer having an outer wall, a rear wall integrally connected to said outer wall and provided with an axial opening, said outer wall and rear wall forming a cavity, a sealing element comprising a hollow gland fabricated from semi-resilient material and having a lower step and an integral upper step, said lower step having a lower sealing surface, said upper step having an upper sealing surface, a ring consisting of a circular disk body provided with a circular collar having a central shaft opening, a circular sealing seat located on the outside surface of said circular collar, said upper sealing surface engaging said circular sealing seat, said sealing ring and said hollow gland located within said cavity, a first garter spring located around said lower step to provide a yielding constrictive force, a second garter spring located around said upper step to provide a yielding constrictive force, to thereby provide a unitary sealing structure about a shaft when said lower step is in engagement with a shaft.
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) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |