Patent US4741666A successfully refreshed from Google Patents.
US4741666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable displacement turbocharger
Assignee: IHI Corp
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Filing: 1986-12-19
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Granted: 1988-05-03
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Expires: 2006-12-19
Abstract
Abstract A turbine casing, a shroud and a gas outlet cover together define a closed doughnut-shaped space. A nozzle driving ring inserted in the space is slidably clamped by the turbine casing and the gas outlet cover. Nozzle shafts extending from nozzle blades are connected through links to the nozzle driving ring. The nozzle driving ring can be driven from outside the space. The nozzle driving ring for simultaneously varying the angle of the nozzle blades is restrained in the axial direction effectively with a high degree of accuracy.
Inventors
- 👤 Masami Shimizu
- 👤 Kinshi Takagi
- 👤 Nobuhiro Kondo
- 👤 Hiromu Furukawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:33
CPC Classifications
F; F02; F02B; F02B37/00; F02B37/12; F02B37/24; F01; F01D; F01D17/00; F01D17/10; F01D17/12; F01D17/14; F01D17/16; F01D17/165; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
93 words
In a variable displacement turbocharger comprising a turbine casing, a shroud, a gas outlet cover, said turbine casing, said shroud and said gas outlet cover together defining a closed doughnut-shaped space, a nozzle driving ring rotatably located in said space, nozzle blades each having a nozzle shaft extending therefrom, and a link for interconnecting said nozzle shaft and said nozzle driving ring, said nozzle driving ring being adapted to be rotatively driven from outside said space, an improvement comprising projection means on the gas outlet cover for rotatably supporting the nozzle driving ring.
Claim 2
Dependent Claim
93 words
In a variable displacement turbocharger comprising a turbine casing, a shroud, a gas outlet cover, said turbine casing, said shroud and said gas outlet cover together defining a closed doughnut-shaped space, a nozzle driving ring rotatably located in said space, nozzle blades each having a nozzle shaft extending therefrom, and a link for interconnecting said nozzle shaft and said nozzle driving ring, said nozzle driving ring being adapted to be rotatively driven from outside said space, an improvement comprising projection means on the gas outlet cover for rotatably supporting the nozzle driving ring.
Claim 3
Dependent Claim
18 words
The turbocharger according to claim 1 wherein the projection means is formed integral with said gas outlet cover.
Claim 4
Dependent Claim
19 words
The turbocharger according to claim 1 wherein the projection means is in the form of a continuous circular ring.
Claim 5
Dependent Claim
20 words
The turbocharger according to claim 1 wherein the projection means is in the form of a plurality of column-like projections.
Claim 6
Dependent Claim
17 words
The turbocharger according to claim 1 wherein a sliding contact surface of said projection means is hardened.
Claim 7
Dependent Claim
25 words
The turbocharger according to claim 4 wherein each of said projections comprises a centering fixture securely held in position by means of a countersunk-head screw.
Claim 8
Dependent Claim
37 words
The turbocharger according to claim 4 wherein radius of curvature of at least end portions of a sliding contact surface of the projection is smaller than that of an inner peripheral surface of the nozzle driving ring.
Claim 9
Dependent Claim
42 words
The turbocharger according to claim 4 wherein some of the projections that are disposed at a position where a load transmitted from the nozzle driving ring acts have enlarged contact surfaces while contact surfaces of the remaining projections are small in area.
Claim 10
Dependent Claim
32 words
The turbocharger according to claim 1 wherein the shroud is formed with a protruded ring portion adapted to engage with the nozzle blade at an angle in excess of its maximum angle.
Claim 11
Dependent Claim
37 words
The turbocharger according to claim 4 wherein at least one of the projections is caused to associate with the nozzle driving ring for stoppage of the latter when the nozzle blade is at the maximum opening degree.
Claim 12
Dependent Claim
35 words
The turbocharger according to claim 1 wherein the nozzle shaft has a uniform diameter throughout its length and an end face of a bearing for support of the nozzle shaft directly contacts the nozzle blade.
Claim 13
Dependent Claim
27 words
The turbocharger according to claim 1 wherein a side surface of the nozzle blade adjacent to the shroud is inclined in a direction away from the shroud.
Claim 14
Dependent Claim
14 words
The turbocharger according to claim 1 wherein compressed air is introduced into said space.
Claim 15
Dependent Claim
18 words
The turbocharger according to claim 1 wherein said space and the gas outlet are intercommunicated with each other.
Claim 16
Dependent Claim
34 words
The turbocharger according to claim 1 wherein said nozzle driving ring is slidably clamped at its periphery between said turbine casing and said gas outlet cover for rotatable accomodation thereof in said doughnut-shaped space.
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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) | 1991-05-03 | 1991-11-02 | 1992-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-03 | 1995-11-02 | 1996-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-03 | 1999-11-02 | 2000-05-03 | $7700.00 | Window Closed / Lapsed |