US3751045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid seal
Assignee: Ingersoll Rand Co
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Filing: 1970-03-19
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Granted: 1973-08-07
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Expires: 1990-03-19
Abstract
Abstract This is an improved straight leakoff seal. A differential pressure is maintained in the space between a first sealing member such as a collar on a rotatable shaft and an axially movable second seal member. An annular dam on the second seal member located adjacent the high-pressure end of the space between the two seal members is provided with a plurality of grooves equally spaced circumferentially. The new seal may be used for sealing gas or liquid.
Inventors
- 👤 H Lindeboom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:13
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/3404; F16J15/3408; F16J15/3412
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
213 words
In combination with a housing having a fluid inlet, a fluid outlet, a first movable seal member in the housing and located along the fluid path from the fluid inlet to the fluid outlet, wherein the improvement comprises: a second seal member adapted to be moved toward and away from the first movable seal member and provided with a mating face and a rear face, secondary sealing means located between the housing and the second seal member so that a differential pressure may be created in the space between the first and second seal members and at least a portion of said rear face may be subjected to fluid pressure, said second seal member having a mating face including a pair of dams separated by a recess with one of said dams being located adjacent the high pressure end of the space between the first and second seal members and a plurality of pressure differential controlling grooves having straight sides and constant width and depth extending entirely through the dam adjacent said high pressure end, each of said grooves extending in the same angular direction ranging from 30* to 60* with respect to the radius of the second seal member through at least a part of the dam adjacent the high pressure end.
Claim 2
Dependent Claim
213 words
In combination with a housing having a fluid inlet, a fluid outlet, a first movable seal member in the housing and located along the fluid path from the fluid inlet to the fluid outlet, wherein the improvement comprises: a second seal member adapted to be moved toward and away from the first movable seal member and provided with a mating face and a rear face, secondary sealing means located between the housing and the second seal member so that a differential pressure may be created in the space between the first and second seal members and at least a portion of said rear face may be subjected to fluid pressure, said second seal member having a mating face including a pair of dams separated by a recess with one of said dams being located adjacent the high pressure end of the space between the first and second seal members and a plurality of pressure differential controlling grooves having straight sides and constant width and depth extending entirely through the dam adjacent said high pressure end, each of said grooves extending in the same angular direction ranging from 30* to 60* with respect to the radius of the second seal member through at least a part of the dam adjacent the high pressure end.
Claim 3
Dependent Claim
43 words
The combination of claim 1 wherein the first movable seal member is a collar mounted on a rotatable shaft, the second seal member is coaxial with said rotatable shaft, the dams are annular dams, and the plurality of grooves are equally spaced circumferentially.
Claim 4
Dependent Claim
10 words
The combination of claim 2 wherein each groove is V-shaped.
Claim 5
Dependent Claim
37 words
The combination of claim 2 wherein each of the grooves extend entirely through said dam at an angle ranging from 30* to 60* in a clockwise direction with respect to the radius of the second seal member.
Claim 6
Dependent Claim
37 words
The combination of claim 2 wherein each of the grooves extend entirely through said dam at an angle ranging from 30* to 60* in a counterclockwise direction with respect to the radius of the second seal member.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |