US3733144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Viscosity pump
Assignee: Delaware Capital Formation Inc
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Filing: 1971-09-08
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Granted: 1973-05-15
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Expires: 1991-09-08
Abstract
Abstract The inlet of a relatively large viscosity pump for high speed applications is sealed by a small viscosity pump which directs a stream of oil onto the rotor of the large viscosity pump to produce an air seal that increases the inlet suction of the large viscosity pump. The small viscosity pump includes (1) an air scraper in close proximity to the rotor of the large viscosity pump immediately before the rotor enters an oil chamber, and (2) a small oil conduit which extends adjacent the air scraper to the oil chamber of the large viscosity pump. The suction produced by the air scraper draws oil up through the small oil conduit and onto the periphery of the rotor to produce an air seal at the point where the rotor enters the inlet of the larger pump.
Inventors
- 👤 W Gardner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:57
CPC Classifications
F; F04; F04D; F04D5/00; F04D5/001
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
162 words
In a viscosity pump having a housing, having a rotor journalled in said housing, having a stator in said housing constructed and positioned to provide a viscous fluid channel between the rotor and stator, said housing providing a reservoir for viscous fluid having a fluid level located so that a portion of the rotor is immersed in the fluid, and said stator having a pump inlet portion, the improvement comprising means creating an air seal adjacent a portion of the periphery of the rotor before said portion reaches the viscous fluid level in the reservoir, said air seal including means for applying viscous fluid from the reservoir to the periphery of the rotor for use in said air seal; there being means above the level of viscous fluid for scraping air from a peripheral portion of the rotor prior to said portion being immersed, and said means for creating an air seal being located between said air-scraping means and the pump inlet.
Claim 2
Dependent Claim
162 words
In a viscosity pump having a housing, having a rotor journalled in said housing, having a stator in said housing constructed and positioned to provide a viscous fluid channel between the rotor and stator, said housing providing a reservoir for viscous fluid having a fluid level located so that a portion of the rotor is immersed in the fluid, and said stator having a pump inlet portion, the improvement comprising means creating an air seal adjacent a portion of the periphery of the rotor before said portion reaches the viscous fluid level in the reservoir, said air seal including means for applying viscous fluid from the reservoir to the periphery of the rotor for use in said air seal; there being means above the level of viscous fluid for scraping air from a peripheral portion of the rotor prior to said portion being immersed, and said means for creating an air seal being located between said air-scraping means and the pump inlet.
Claim 3
Dependent Claim
156 words
In a viscosity pump having a housing, having a rotor journalled in said housing, having a stator in said housing constructed and positioned to provide a viscous fluid channel between the rotor and stator, said housing providing a reservoir for viscous fluid having a fluid level located so that a portion of the rotor is immersed in the fluid, and said stator having a pump inlet portion, the improvement comprising an auxiliary stator close to a portion of the periphery of the rotor, part of said auxiliary stator being cooperable with a rotor portion before said portion reaches the viscous fluid level in the reservoir during rotation, said auxiliary stator having a face with a recess adjacent the periphery of the rotor, means for supplying viscous fluid from the reservoir to said recess to create an air seal, and means for removing air from a peripheral portion of the rotor before said portion passes the recess.
Claim 4
Dependent Claim
156 words
In a viscosity pump having a housing, having a rotor journalled in said housing, having a stator in said housing constructed and positioned to provide a viscous fluid channel between the rotor and stator, said housing providing a reservoir for viscous fluid having a fluid level located so that a portion of the rotor is immersed in the fluid, and said stator having a pump inlet portion, the improvement comprising an auxiliary stator close to a portion of the periphery of the rotor, part of said auxiliary stator being cooperable with a rotor portion before said portion reaches the viscous fluid level in the reservoir during rotation, said auxiliary stator having a face with a recess adjacent the periphery of the rotor, means for supplying viscous fluid from the reservoir to said recess to create an air seal, and means for removing air from a peripheral portion of the rotor before said portion passes the recess.
Claim 5
Dependent Claim
143 words
In a viscosity pump having a housing, having a rotor journalled in said housing, having a stator in said housing constructed and positioned to provide a viscous fluid channel between the rotor and stator, said housing providing a reservoir for viscous fluid having a fluid level located so that a portion of the rotor is immersed in the fluid, and said stator having a pump inlet portion, the improvement comprising means creating an air seal adjacent a portion of the periphery of the rotor before said portion reaches the viscous fluid level in the reservoir, said air seal including means for applying viscous fluid from the reservoir to the periphery of the rotor for use in said air seal, the means for applying viscous fluid to the periphery of the rotor for use in said air seal including an auxiliary viscous fluid pump.
Claim 6
Dependent Claim
143 words
In a viscosity pump having a housing, having a rotor journalled in said housing, having a stator in said housing constructed and positioned to provide a viscous fluid channel between the rotor and stator, said housing providing a reservoir for viscous fluid having a fluid level located so that a portion of the rotor is immersed in the fluid, and said stator having a pump inlet portion, the improvement comprising means creating an air seal adjacent a portion of the periphery of the rotor before said portion reaches the viscous fluid level in the reservoir, said air seal including means for applying viscous fluid from the reservoir to the periphery of the rotor for use in said air seal, the means for applying viscous fluid to the periphery of the rotor for use in said air seal including an auxiliary viscous fluid pump.
Claim 7
Dependent Claim
39 words
A viscosity pump as claimed in claim 3 in which the auxiliary viscous fluid pump includes a viscous fluid channel, and in which there is a conduit leading from said reservoir to said fluid channel of the auxiliary pump.
Claim 8
Dependent Claim
154 words
In a viscosity pump having a housing, having a rotor journalled in said housing, having a stator in said housing constructed and positioned to provide a viscous fluid channel between the rotor and stator, said housing providing a reservoir for viscous fluid having a fluid level located so that a portion of the rotor is immersed in the fluid, and said stator having a pump inlet portion, the improvement comprising means creating an air seal adjacent a portion of the periphery of the rotor before said portion reaches the viscous fluid level in the reservoir, said air seal including means for applying viscous fluid from the reservoir to the periphery of the rotor for use in said air seal, the air seal creating means including a fixed projection close to the periphery of the rotor with the space between the projection and rotor sealed by the viscous fluid from said viscous fluid applying means.
Claim 9
Dependent Claim
154 words
In a viscosity pump having a housing, having a rotor journalled in said housing, having a stator in said housing constructed and positioned to provide a viscous fluid channel between the rotor and stator, said housing providing a reservoir for viscous fluid having a fluid level located so that a portion of the rotor is immersed in the fluid, and said stator having a pump inlet portion, the improvement comprising means creating an air seal adjacent a portion of the periphery of the rotor before said portion reaches the viscous fluid level in the reservoir, said air seal including means for applying viscous fluid from the reservoir to the periphery of the rotor for use in said air seal, the air seal creating means including a fixed projection close to the periphery of the rotor with the space between the projection and rotor sealed by the viscous fluid from said viscous fluid applying means.
Claim 10
Dependent Claim
28 words
A viscosity pump as defined in claim 5 wherein said air scraping means and said air seal projection are formed on an auxiliary stator connected to said housing.
Claim 11
Dependent Claim
84 words
A viscosity puMp as defined in claim 5 in which there is an auxiliary stator and in which there is means in said auxiliary stator for scraping air from a peripheral portion of the rotor prior to said portion being immersed, and in which the means for creating an air seal is located between said air-scraping means and the pump inlet, said viscous fluid channel of said auxiliary pump being in said auxiliary stator between said air-scraping means and said air seal creating means.
Claim 12
Dependent Claim
149 words
In a viscosity pump having a housing, having a rotor journalled in said housing, having a stator in said housing constructed and positioned to provide a viscous fluid channel between the rotor and stator, said housing providing a reservoir for viscous fluid having a fluid level located so that a portion of the rotor is immersed in the fluid, and said stator having a pump inlet portion, the improvement comprising means creating an air seal adjacent a portion of the periphery of the rotor before said portion reaches the viscous fluid level in the reservoir, said air seal including means for applying viscous fluid from the reservoir to the periphery of the rotor for use in said air seal, the viscous fluid channel between the rotor and stator being less than 360*, and the means for creating an air seal being located in advance of said viscous fluid channel.
Claim 13
Dependent Claim
149 words
In a viscosity pump having a housing, having a rotor journalled in said housing, having a stator in said housing constructed and positioned to provide a viscous fluid channel between the rotor and stator, said housing providing a reservoir for viscous fluid having a fluid level located so that a portion of the rotor is immersed in the fluid, and said stator having a pump inlet portion, the improvement comprising means creating an air seal adjacent a portion of the periphery of the rotor before said portion reaches the viscous fluid level in the reservoir, said air seal including means for applying viscous fluid from the reservoir to the periphery of the rotor for use in said air seal, the viscous fluid channel between the rotor and stator being less than 360*, and the means for creating an air seal being located in advance of said viscous fluid channel.
References Cited (Backward Citations)
US2351431A
Cited
US2843047A
Cited
US2969020A
Cited
US3396664A
Cited
US3635578A
Cited
US3669561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |