US3600101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compact high temperature pump
Assignee: BURKS PUMPS INC A CORP OF DE
•
Filing: 1969-12-22
•
Granted: 1971-08-17
•
Expires: 1989-12-22
Abstract
Abstract A compact, inexpensive, high temperature pump includes a shaft seal cavity area separated from an impeller cavity area by a film-thin passageway whereby a small portion of a first high temperature fluid may flow from the impeller cavity to the seal cavity through the passageway. A press-fit throttle bushing having a recess in its outer surface is press-fit into a bore to provide a separate passageway for a second low temperature fluid. The throttle bushing or fluid jacket extends around the outside and in heat transfer relationship to the seal cavity and the passageway so that the portion of the first fluid is greatly cooled thereby allowing the use of conventional and inexpensive shaft seals for the high temperature pump.
Inventors
- 👤 Faul L Oglesby
- 👤 Richard E Reeves
- 👤 William K Haebich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:02
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/08; F04D29/10; F04D29/12; F04D29/126; F04D29/58; F04D29/586; F04D29/588; F04D7/00; F04D7/02; F04D7/06; Y; Y10; Y10S; Y10S277/00; Y10S277/93
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
199 words
A high temperature pump comprising a pump frame means, a driving shaft means, said shaft means being mounted for rotation in said frame means, an impeller attached to said shaft means to rotate therewith, means defining an impeller cavity area adapted to receive a first pumped fluid therein and therethrough, said impeller being located in said impeller cavity area, a driving shaft seal means located about said shaft means at a point spaced from said impeller cavity area, a shaft seal cavity area within said frame means and generally extending around said shaft seal means, means defining an axial extending fluid passage connecting said impeller cavity area and said shaft seal cavity area so that a portion of said first fluid may flow from said impeller cavity area into and out of said shaft seal cavity area, said means including a fluid jacket located within said frame and generally extending around said communicating passage and said shaft seal cavity, said fluid jacket having means to carry a second fluid therein and therethrough whereby the temperature of the first fluid in said seal cavity area may be greatly influenced by the temperature of said second fluid in said fluid jacket.
Claim 2
Dependent Claim
199 words
A high temperature pump comprising a pump frame means, a driving shaft means, said shaft means being mounted for rotation in said frame means, an impeller attached to said shaft means to rotate therewith, means defining an impeller cavity area adapted to receive a first pumped fluid therein and therethrough, said impeller being located in said impeller cavity area, a driving shaft seal means located about said shaft means at a point spaced from said impeller cavity area, a shaft seal cavity area within said frame means and generally extending around said shaft seal means, means defining an axial extending fluid passage connecting said impeller cavity area and said shaft seal cavity area so that a portion of said first fluid may flow from said impeller cavity area into and out of said shaft seal cavity area, said means including a fluid jacket located within said frame and generally extending around said communicating passage and said shaft seal cavity, said fluid jacket having means to carry a second fluid therein and therethrough whereby the temperature of the first fluid in said seal cavity area may be greatly influenced by the temperature of said second fluid in said fluid jacket.
Claim 3
Dependent Claim
66 words
A high temperature pump according to claim 1 wherein said communicating passage is of a film-thin cross section and is adjacent to and in heat transfer relationship with said fluid jacket whereby said film-thin cross section permits only the very small percentage of said first fluid to reach said seal cavity area and thereby allows this small amount of fluid to be greatly changed in temperature.
Claim 4
Dependent Claim
92 words
A high temperature pump according to claim 1 wherein said frame means includes a bore therein substantially coaxial with said shaft means, said fluid jacket having a ring configuration with a channel shaped recess in its outer surface, said outer surface of said fluid jacket conforming to said bore in said frame means, said fluid jacket being press-fit in said bore whereby said recess in said fluid jacket forms a fluid tight passageway, said fluid tight passageway having an inlet and outlet means thereto whereby said second fluid may be circulated therethrough.
Claim 5
Dependent Claim
61 words
A high temperature pump according to claim 1 wherein said fluid jacket has an interior cylindrical bore and said seal means includes a washer-spacer of a cylindrical configuration substantially closing said bore but spaced from said bore about its periphery, said space between said washer-spacer and said bore constituting said communicating passageway from said impeller cavity to said seal means cavity.
Claim 6
Dependent Claim
90 words
A high temperature pump according to claim 1 wherein said pump frame means includes an external casting, an internal shaft support portion and a separAble front cover plate or casing portion, said front cover plate substantially surrounding said impeller and forming a substantial portion of the boundary of said impeller cavity, said impeller being detachably mounted at the end of said shaft whereby maintenance and repair of said impeller and shaft seal construction may be readily affected by the simple detachment of said front cover plate portion and said impeller.
Claim 7
Dependent Claim
41 words
A high temperature pump according to claim 1 wherein a driving means is connected to the shaft means and includes a shaft bearing means adjacent said compact shaft seal construction whereby minimum impeller overhang is provided thereby insuring long bearing life.
Claim 8
Dependent Claim
56 words
A high temperature pump according to claim 1 wherein said fluid jacket includes a retaining lip surrounding said shaft, said shaft sealing means being retained on one end by said retaining lip and being held at said other end under compressive force by an abutment on said impeller at the point of intersection with such shaft.
Claim 9
Dependent Claim
165 words
A compact, inexpensive high temperature pump having an impeller cavity adapted to contain high temperature fluid, a driven impeller in said cavity, a shaft means connected adjacent one end to said impeller and adapted to be rotated by a driving means, a seal means about and in part spaced from said shaft, said seal means including a cooling jacket and forming a seal cavity bounding the outside thereof, and a sealing means on the inside to define a film-thin passageway from said impeller cavity to said seal cavity whereby fluid from said impeller cavity may pass to and from said seal cavity, said cooling jacket being around the outside of and in heat transfer relationship to said seal cavity and said passageway, said cooling jacket having a second, low temperature fluid passing therethrough whereby said fluid in said passageway and said seal cavity is cooled to a temperature intermediate said high and low temperatures so that said seal means need only withstand said intermediate temperature.
Claim 10
Dependent Claim
165 words
A compact, inexpensive high temperature pump having an impeller cavity adapted to contain high temperature fluid, a driven impeller in said cavity, a shaft means connected adjacent one end to said impeller and adapted to be rotated by a driving means, a seal means about and in part spaced from said shaft, said seal means including a cooling jacket and forming a seal cavity bounding the outside thereof, and a sealing means on the inside to define a film-thin passageway from said impeller cavity to said seal cavity whereby fluid from said impeller cavity may pass to and from said seal cavity, said cooling jacket being around the outside of and in heat transfer relationship to said seal cavity and said passageway, said cooling jacket having a second, low temperature fluid passing therethrough whereby said fluid in said passageway and said seal cavity is cooled to a temperature intermediate said high and low temperatures so that said seal means need only withstand said intermediate temperature.
Claim 11
Dependent Claim
48 words
A high temperature pump according to claim 8 wherein a washer-spacer surrounds but is spaced from said shaft, said space between said washer-spacer and said shaft forming a film-thin passageway whereby only a very minor percentage of fluid passing through said impeller cavity passes into said seal cavity.
Claim 12
Dependent Claim
63 words
A high temperature pump according to claim 8 wherein said seal means includes a seat having a groove in the outer periphery thereof, a retaining member seated in said groove, a rotating assembly of a plurality of spacer-sealing members being driven by said shaft, said seat and rotating spacer-sealing member rubbing together to effectively seal and retain the fluid in the seal cavity.
References Cited (Backward Citations)
GB190826418A
Cited
GB231143A
Cited
AT114725B
Cited
AT153424B
Cited
US2864314A
Cited
US2977042A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-16 | 1975-02-15 | 1975-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-16 | 1979-02-15 | 1979-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-16 | 1983-02-15 | 1983-08-17 | $7700.00 | Window Closed / Lapsed |