US3675934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screen changer mounting
Assignee: Individual
•
Filing: 1970-06-01
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Granted: 1972-07-11
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Expires: 1990-06-01
Abstract
Abstract A sealing arrangement between a screen changer strainer and a clamping body in which an annular rib on a sealing plate abutting the strainer fits in an annular groove in the clamping body and a hydraulically displaceable material is confined in the space between the end face of the rib and the bottom of the groove. As the clamping body is pressed against the strainer and undergoes distortion creating areas of high and low pressure around the rim, the material in the groove is displaceable circumferentially of the groove to distribute the forces evenly around the face of the rib abutting the strainer and thereby provide a tight seal and an even distribution of forces on the strainer.
Inventors
- 👤 Eugene E Heston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:56
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/254; B29C48/03; B29C48/36; B29C48/50; B29C48/69; B29C48/691; B29C48/6912
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
157 words
A screen changer of the type in which a strainer is forced through a slot under substantial pressure into a space in a clamping body containing an opening for conveying extruded material through said strainer comprising a sealing and sliding plate member interposed between said strainer and said clamping body, clamping pressure means for forcing said clamping body against said sealing and sliding plate member, an annular groove surrounding said opening in the surface of said clamping body adjacent to said plate member, an annular rib on said plate member disposed in said annular groove and a ring of resilient rubber-like material disposed in said annular groove beneath said annular rib, the thickness of said annular rib and said ring of resilient rubber-like material in the compressed condition being greater than the depth of said annular groove whereby there will be hydraulic displacement axially and circumferentially of said ring to compensate for deflection of said clamping body.
Claim 2
Dependent Claim
157 words
A screen changer of the type in which a strainer is forced through a slot under substantial pressure into a space in a clamping body containing an opening for conveying extruded material through said strainer comprising a sealing and sliding plate member interposed between said strainer and said clamping body, clamping pressure means for forcing said clamping body against said sealing and sliding plate member, an annular groove surrounding said opening in the surface of said clamping body adjacent to said plate member, an annular rib on said plate member disposed in said annular groove and a ring of resilient rubber-like material disposed in said annular groove beneath said annular rib, the thickness of said annular rib and said ring of resilient rubber-like material in the compressed condition being greater than the depth of said annular groove whereby there will be hydraulic displacement axially and circumferentially of said ring to compensate for deflection of said clamping body.
Claim 3
Dependent Claim
74 words
A screen changer according to claim 1 wherein clamping pressure means are provided on each side of said slot so that said clamping body is bowed between said clamping pressure means by the strainer with the deflection being greatest at positions towards the center of the slot and shim members disposed in the annular groove at said positions towards the center of the slot to reduce the hydraulic displacement of said resilient rubber-like material.
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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |