Patent US3700247A successfully refreshed from Google Patents.
US3700247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flush cooling of shaft sealing screw means
Assignee: MAY V LATINEN
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Filing: 1971-08-16
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Granted: 1972-10-24
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Expires: 1991-08-16
Abstract
Abstract In certain shaft seals using a viscoseal-type sealing screw such as those adjacent the pressurized screw pump section of a viscous liquid devolatilizer, excessive heat buildup and/or prolonged elevated temperature exposure in the seal region can either deteriorate the liquid materials in the sealing screw or render such liquids less viscous to an extent such that the seal is no longer fully operative. To cool and flush the sealing screw and the liquid materials therein, a fluid conduit bringing fresh liquid material continuously to the sealing screw from the adjacent pressurized section is provided.
Inventors
- 👤 Robert G Butler
- 👤 Don E Carter
- 👤 George A Latinen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:43
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/40; F16J15/406; B; B29; B29C; B29C48/00; B29C48/25; B29C48/254; B29C48/36; B29C48/50; B29C48/03; Y; Y10; Y10S; Y10S277/00; Y10S277/93; Y10S425/00; Y10S425/243
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
220 words
Apparatus for flush cooling a shaft sealing assembly incorporating a viscoseal-type sealing screw means, said apparatus comprising: A. a fluid tight, generally elongated housing having defined therein at adjacent, adjoining regions generally along a common axis extending therethrough a radially symmetrical sealing chamber coaxial with said axis, and a pressurizable fluid chamber which is adapted to be normally pressurized to some predetermined relatively high fluid pressure with a fluid of predetermined relatively high viscosity, B. a rotatable shaft coaxial with said axis and extending through said sealing chambers and into said pressurizable fluid chamber, C. viscoseal-type sealing screw means in said sealing chamber circumferentially located either on said shaft or on the inner walls of said second sealing chamber and having radially projecting, helically extending rib portions adapted to form when said shaft rotates at a predetermined speed with pressurized fluid in said fluid chamber a seal between said housing and said shaft in cooperation with fluid from said pressurizable fluid chamber and urge said fluid from said sealing chamber into said fluid chamber, and D. conduit means interconnecting said pressurizable fluid chamber with said sealing chamber and adapted to convey said pressurized fluid from said pressurizable fluid chamber to said sealing chamber, the discharge orifice of said conduit means being positioned in said sealing chamber opposite said rib portions.
Claim 2
Dependent Claim
220 words
Apparatus for flush cooling a shaft sealing assembly incorporating a viscoseal-type sealing screw means, said apparatus comprising: A. a fluid tight, generally elongated housing having defined therein at adjacent, adjoining regions generally along a common axis extending therethrough a radially symmetrical sealing chamber coaxial with said axis, and a pressurizable fluid chamber which is adapted to be normally pressurized to some predetermined relatively high fluid pressure with a fluid of predetermined relatively high viscosity, B. a rotatable shaft coaxial with said axis and extending through said sealing chambers and into said pressurizable fluid chamber, C. viscoseal-type sealing screw means in said sealing chamber circumferentially located either on said shaft or on the inner walls of said second sealing chamber and having radially projecting, helically extending rib portions adapted to form when said shaft rotates at a predetermined speed with pressurized fluid in said fluid chamber a seal between said housing and said shaft in cooperation with fluid from said pressurizable fluid chamber and urge said fluid from said sealing chamber into said fluid chamber, and D. conduit means interconnecting said pressurizable fluid chamber with said sealing chamber and adapted to convey said pressurized fluid from said pressurizable fluid chamber to said sealing chamber, the discharge orifice of said conduit means being positioned in said sealing chamber opposite said rib portions.
Claim 3
Dependent Claim
62 words
The apparatus of claim 1 wherein: A. a second radially symmetrical sealing chamber is located adjacent said radially symmetrical sealing chamber on the side thereof remote from said pressurizable fluid chamber, B. said shaft extending through said second sealing chamber, and C. sealing means in said second sealing chamber between said shaft and said housing and adapted to provide a seal therebetween.
Claim 4
Dependent Claim
62 words
The apparatus of claim 1 wherein: A. a second radially symmetrical sealing chamber is located adjacent said radially symmetrical sealing chamber on the side thereof remote from said pressurizable fluid chamber, B. said shaft extending through said second sealing chamber, and C. sealing means in said second sealing chamber between said shaft and said housing and adapted to provide a seal therebetween.
Claim 5
Dependent Claim
16 words
The apparatus of claim 2 wherein said sealing means comprises a second viscoseal-type sealing screw means.
Claim 6
Dependent Claim
21 words
The apparatus of claim 1 including valve means functionally associated with said conduit means for regulating the flow of fluid therethrough.
Claim 7
Dependent Claim
26 words
The apparatus of claim 1 wherein a pressure sensor is located in the terminal region of said sealing chamber remotely relative to said pressurizable fluid chamber.
Claim 8
Dependent Claim
90 words
The apparatus of claim 1 further including: A. pressure sensing means located in the terminal region of said sealing chamber remotely relative to said pressurizable fluid chamber, B. valve means functionally associated with said conduit means for regulating the flow of fluid therethrough, and C. control means respective to said pressure sensor means adapted to control said variable valve means so that the quantity of fluid from said fluid chamber entering said sealing chamber is never sufficient to create a fluid back pressure in the region of said pressure sensor.
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) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |