Patent US4373522A successfully refreshed from Google Patents.
Patent US4101241A successfully refreshed from Google Patents.
US4101241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Super charger with fluid biased heat shroud
Assignee: Komatsu Ltd
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Filing: 1976-05-19
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Granted: 1978-07-18
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Expires: 1996-05-19
Abstract
Abstract A supercharger comprising a center housing, a turbine casing mounted on said center housing, a turbine shaft rotatably supported within said center housing, said turbine shaft having a turbine impeller at one end thereof within said turbine casing, a seal provided on said turbine shaft to prevent lubricant leakage from said center housing to said turbine casing, a heat shroud mounted on said turbine shaft between said center housing and said turbine casing, and a pressure hole formed in said heat shroud which permits communication of the inner and outer parts thereof thereby applying a high pressure in the inside part of said heat shroud to enhance sealing effect of said seal.
Inventors
- 👤 Tamotsu Kasuya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:21
CPC Classifications
F; F01; F01D; F01D25/00; F01D25/18; F01D25/183; F01D25/186
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
145 words
A supercharger, comprising: a center housing having an inlet and an outlet for a lubricant; a turbine casing mounted on said center housing; a turbine shaft rotatably supported within said center housing, said turbine shaft having a turbine impeller at one end thereof within said turbine casing; sealing means provided on said turbine shaft to prevent lubricant leakage from said center housing to said turbine casing; a heat shroud mounted on said turbine shaft between said center housing and said turbine casing; and pressure means provided on said heat shroud which permits communication of the inside and outside thereof thereby applying the pressure on the outside of said heat shroud to the inside of said heat shroud whereby the pressure on the inside of said heat shroud is greater than the pressure in said center housing thereby enhancing the sealing effect of said sealing means.
Claim 2
Dependent Claim
145 words
A supercharger, comprising: a center housing having an inlet and an outlet for a lubricant; a turbine casing mounted on said center housing; a turbine shaft rotatably supported within said center housing, said turbine shaft having a turbine impeller at one end thereof within said turbine casing; sealing means provided on said turbine shaft to prevent lubricant leakage from said center housing to said turbine casing; a heat shroud mounted on said turbine shaft between said center housing and said turbine casing; and pressure means provided on said heat shroud which permits communication of the inside and outside thereof thereby applying the pressure on the outside of said heat shroud to the inside of said heat shroud whereby the pressure on the inside of said heat shroud is greater than the pressure in said center housing thereby enhancing the sealing effect of said sealing means.
Claim 3
Dependent Claim
18 words
A supercharger according to claim 1 wherein said pressure means is a pressure hole through said heat shroud.
Claim 4
Dependent Claim
44 words
A supercharger according to claim 1 wherein said heat shroud has a groove formed thereon, one end of said groove being open to the inside of said turbine casing and the other end thereof being open to said pressure means on said heat shroud.
References Cited (Backward Citations)
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Cited
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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) | 1981-07-17 | 1982-01-16 | 1982-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-17 | 1986-01-16 | 1986-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-17 | 1990-01-16 | 1990-07-18 | $7700.00 | Window Closed / Lapsed |