US3684301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotating shaft seal assembly
Assignee: Individual
•
Filing: 1970-12-22
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Granted: 1972-08-15
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Expires: 1990-12-22
Abstract
Abstract A watertight seal for a shaft turning through a wall separating two fluids under very different pressures or at very different viscosity comprises a part fixed to the wall and a part sliding in the latter. In each of the parts, an O ring joint has a pressure ring surrounding the shaft. Between both parts, there is a cavity containing a fluid of very high viscosity and splines provided on both parts guide the sliding movement and prevent the rotation of the mobile part.
Inventors
- 👤 Claude Rene Jean Malaval
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:36
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/54; F16J15/16; F16J15/40; Y; Y10; Y10S; Y10S277/00; Y10S277/91
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
151 words
A device for mounting a rotatable shaft in fluid-tight fashion to an enclosure wall through which it passes, comprising: a housing attached to the enclosure wall and carrying spaced first and second bearings for locating respective portions of the shaft, a first toroidal seal for sealing the housing to a portion of said shaft intermediate the bearings, said seal comprising a sleeve arranged to encircle the shaft and having respective annular flanges at its opposite ends between which is located an O-ring, an annular body arranged to encircle the shaft between the first toroidal seal and the first bearing and being freely slidable along the shaft, the housing and the annular body defining between them a space receiving a viscous fluid, a second toroidal seal substantially identical to the first for sealing the annular body to the shaft, and means for preventing relative rotation of the annular body and the housing.
Claim 2
Independent Claim
151 words
A device for mounting a rotatable shaft in fluid-tight fashion to an enclosure wall through which it passes, comprising: a housing attached to the enclosure wall and carrying spaced first and second bearings for locating respective portions of the shaft, a first toroidal seal for sealing the housing to a portion of said shaft intermediate the bearings, said seal comprising a sleeve arranged to encircle the shaft and having respective annular flanges at its opposite ends between which is located an O-ring, an annular body arranged to encircle the shaft between the first toroidal seal and the first bearing and being freely slidable along the shaft, the housing and the annular body defining between them a space receiving a viscous fluid, a second toroidal seal substantially identical to the first for sealing the annular body to the shaft, and means for preventing relative rotation of the annular body and the housing.
Claim 3
Dependent Claim
23 words
The device as claimed in claim 1, wherein the housing and the annular body are coupled by an elastically expansible and compressible bellows.
Claim 4
Dependent Claim
23 words
The device as claimed in claim 1, wherein the housing and the annular body are coupled by an elastically expansible and compressible bellows.
Claim 5
Dependent Claim
48 words
The device as claimed in claim 2, wherein the means for preventing relative rotation of the annular body and the housing comprises cooperating sets of splines on the body and the housing extending parallel to the shaft axis, whereby the body is free to slide along the shaft.
Claim 6
Dependent Claim
48 words
The device as claimed in claim 2, wherein the means for preventing relative rotation of the annular body and the housing comprises cooperating sets of splines on the body and the housing extending parallel to the shaft axis, whereby the body is free to slide along the shaft.
Claim 7
Dependent Claim
43 words
The device as claimed in claim 1, wherein said housing defines a cylindrical passage, wherein the annular body is slidable within and sealed to the walls of said cylindrical passage and defines, with the annular body, the space for receiving the viscous fluid.
Claim 8
Dependent Claim
48 words
The device as claimed in claim 4, wherein the means for preventing relative rotation of the annular body and the housing comprises cooperating sets of splines of the body and the housing extending parallel to the shaft axis, whereby the body is free to slide along the shaft.
Claim 9
Dependent Claim
48 words
The device as claimed in claim 1, wherein the means for preventing relative rotation of the annular body and the housing comprises cooperating sets of splines on the body and the housing extending parallel to the shaft axis, whereby the body is free to slide along the 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) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |