US3866924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wiper and diaphragm seal device
Assignee: OILWELL Inc A CORP OF
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Filing: 1973-08-16
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Granted: 1975-02-18
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Expires: 1993-08-16
Abstract
Abstract A wiper and diaphragm seal device for a reciprocating rod or shaft. Inherently the rod or shaft has limited transverse displacement. The device affords a two-way seal against fluid leaking around the rod or shaft, and it includes substantially inflexible wiper rings which closely hug the rod or shaft and float therewith on transverse displacement. Resilient O-rings encircle the wiper rings and bear against the inner circumferential face of a surrounding housing to complete the seal.
Inventors
- 👤 Joseph W French
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:16
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3204; F16J15/3224
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
177 words
In a mechanism which includes an axially movable elongated member subject to limited transverse displacement, a housing through which said member extends, a wiper and seal device within said housing encompassing said member, and means holding said device in said housing, the improvement in which said device comprises: wiper rings of relatively inflexible material having a low coefficient of friction and being of U-shape in cross section and having lips closely hugging said member; there being first and second wiper rings, the lips of which face in one direction to afford a double-seal as said member travels away from this direction; there being a third wiper ring, the lips of which face in the opposite direction to afford a seal as said member travels away from the latter direction, said second and third wiper rings abutting back-to-back; a spacer between said first and second wiper rings; and resilient means encircling said wiper rings and bearing against the inner circumferential face of said housing; whereby said wiper rings float with said member on transverse displacement of the latter.
Claim 2
Dependent Claim
177 words
In a mechanism which includes an axially movable elongated member subject to limited transverse displacement, a housing through which said member extends, a wiper and seal device within said housing encompassing said member, and means holding said device in said housing, the improvement in which said device comprises: wiper rings of relatively inflexible material having a low coefficient of friction and being of U-shape in cross section and having lips closely hugging said member; there being first and second wiper rings, the lips of which face in one direction to afford a double-seal as said member travels away from this direction; there being a third wiper ring, the lips of which face in the opposite direction to afford a seal as said member travels away from the latter direction, said second and third wiper rings abutting back-to-back; a spacer between said first and second wiper rings; and resilient means encircling said wiper rings and bearing against the inner circumferential face of said housing; whereby said wiper rings float with said member on transverse displacement of the latter.
Claim 3
Dependent Claim
163 words
In a mechanism which includes an axially movable elongated member subject to limited transverse displacement, a housing through which said member extends, a wiper and seal device within said housing encompassing said member, and means holding said device in said housing, the improvement in which said device comprises: wiper rings of relatively inflexible material having a low coefficient of friction and being of U-shape in cross section and having lips which extend substantially parallel with the surface of said member and closely hug said member; the lips of at least one of said wiper rings facing in one direction and the lips of at least another of said wiper rings facing in the opposite direction to afford a two-way seal against fluid leaking in either direction around said member; and flexible resilient O-rings encircling each of said wiper rings and bearing against the inner circumferential face of said housing; whereby said wiper rings float with said member on transverse displacement of the latter.
Claim 4
Dependent Claim
163 words
In a mechanism which includes an axially movable elongated member subject to limited transverse displacement, a housing through which said member extends, a wiper and seal device within said housing encompassing said member, and means holding said device in said housing, the improvement in which said device comprises: wiper rings of relatively inflexible material having a low coefficient of friction and being of U-shape in cross section and having lips which extend substantially parallel with the surface of said member and closely hug said member; the lips of at least one of said wiper rings facing in one direction and the lips of at least another of said wiper rings facing in the opposite direction to afford a two-way seal against fluid leaking in either direction around said member; and flexible resilient O-rings encircling each of said wiper rings and bearing against the inner circumferential face of said housing; whereby said wiper rings float with said member on transverse displacement of the latter.
Claim 5
Dependent Claim
22 words
An improvement as defined in claim 2 comprising in addition respective retainer rings encircling said wiper rings and receiving the respective O-rings.
References Cited (Backward Citations)
US1982252A
Cited
US1872665A
Cited
US3268232A
Cited
US3272520A
Cited
US3418001A
Cited
US3774920A
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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) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |