Patent US4210408A successfully refreshed from Google Patents.
US4210408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Eccentric pin positive locking device for hydraulic turbine wicket gates
Assignee: Voith Hydro Inc
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Filing: 1978-10-30
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Granted: 1980-07-01
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Expires: 1998-10-30
Abstract
Abstract A hydraulic turbine wicket gate operating assembly including an eccentric pin having a separate hexagonal spacer attached provides a novel means for turning the eccentric pin and fixing it from rotation beyond a desired point. With the arrangement, a single gate operating ring can be utilized to permit all of the gates to move in unison and to provide for the simultaneous closing of each gate against each adjacent gate.
Inventors
- 👤 Donald W. Nace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:53
CPC Classifications
F; F03; F03B; F03B3/00; F03B3/16; F03B3/18; F03B3/183; Y; Y02; Y02E; Y02E10/00; Y02E10/20
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
180 words
In an operating mechanism for a wicket gate of a hydraulic turbine having wicket gate operating ring: a bore in the wicket gate operating ring; an eccentric pin having a cylindrical eccentric body portion the axis of which is offset but parallel to the axis of said pin, said cylindrical eccentric body portion being disposed within said bore of the wicket gate operating ring; a wicket gate drive link operably connected to effect movement of said wicket gate, said drive link being secured to said eccentric pin to be driven thereby; a sleeve nut mounted on said eccentric pin in abutting engagement with said drive link; locking means engaged on said eccentric pin in engagement with said sleeve to lock said sleeve nut and said drive link to said eccentric pin; removable means operating between said sleeve nut and said eccentric pin and operable to prevent relative rotational movement between said sleeve nut and said eccentric pin; and, means to secure said sleeve nut in an adjusted radial position and thereby maintain said eccentric pin in an adjusted radial position.
Claim 2
Dependent Claim
180 words
In an operating mechanism for a wicket gate of a hydraulic turbine having wicket gate operating ring: a bore in the wicket gate operating ring; an eccentric pin having a cylindrical eccentric body portion the axis of which is offset but parallel to the axis of said pin, said cylindrical eccentric body portion being disposed within said bore of the wicket gate operating ring; a wicket gate drive link operably connected to effect movement of said wicket gate, said drive link being secured to said eccentric pin to be driven thereby; a sleeve nut mounted on said eccentric pin in abutting engagement with said drive link; locking means engaged on said eccentric pin in engagement with said sleeve to lock said sleeve nut and said drive link to said eccentric pin; removable means operating between said sleeve nut and said eccentric pin and operable to prevent relative rotational movement between said sleeve nut and said eccentric pin; and, means to secure said sleeve nut in an adjusted radial position and thereby maintain said eccentric pin in an adjusted radial position.
Claim 3
Dependent Claim
35 words
Operating mechanism according to claim 1 wherein said wicket gate drive link is operably connected to effect movement of the wicket gate through an operating lever arm which is adjustably secured to the wicket gate.
Claim 4
Dependent Claim
71 words
Operating mechanism according to claim 2 wherein said operating lever arm includes a gate arm keyed to a shaft of the wicket gate; said operating lever arm is mounted on the hub of said gate arm and adjustably secured thereto; and, a strain pin operating between said gate arm and said operating lever arm to protect the operating mechanism in the event of the wicket gate being physically prevented from closing.
Claim 5
Dependent Claim
25 words
Operating mechanism according to claim 3 wherein said wicket gate drive link is pivotally and releasably secured to the free end of said operating lever.
Claim 6
Dependent Claim
36 words
Operating mechanism according to claim 1 wherein there is provided a bushing in the bore of the wicket gate operating ring and the cylindrical eccentric body portion of said eccentric pin is disposed within said bushing.
Claim 7
Dependent Claim
48 words
Operating mechanism according to claim 5 wherein said removable means operating between said sleeve nut and said eccentric pin to prevent relative rotation between said sleeve nut and said eccentric pin is a removable key seated in said eccentric pin and a keyway formed in said sleeve nut.
Claim 8
Dependent Claim
62 words
Operating mechanism according to claim 1 wherein said sleeve nut is provided with a plurality of external flat surfaces; and, said means to secure said sleeve nut in an adjusted position is a bar member tack welded to said wicket gate drive link in position on said wicket gate drive link against one of the external flat surfaces on said sleeve nut.
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) | 1983-07-01 | 1983-12-31 | 1984-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-01 | 1987-12-31 | 1988-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-01 | 1991-12-31 | 1992-07-01 | $7700.00 | Window Closed / Lapsed |