Patent US3659503A successfully refreshed from Google Patents.
US3659503A
Expired / Lapsed
US
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Hydraulic rotary-blade pivot drive for hydro-stabilizers and rudder systems
Assignee: Blohm and Voss GmbH
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Filing: 1970-05-08
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Granted: 1972-05-02
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Expires: 1990-05-08
Abstract
Abstract A hydraulic rotary-blade pivot drive for hydro-stabilizers and rudder systems, particularly on ships, with receiving grooves on the external sides of the rotor blades and/or the inside of the stator blades, and with sealing strips and elastic elements which are radially displaceable in said receiving grooves. Slave blades are provided between the sealing strips and the elastic elements over the entire length of the rotor. The slave blades are held in the receiving grooves with clearance so as to be radially displaceable and project beyond the outsides of the rotor blades and the insides of the stator blades and are designed to ensure hermeticity on all sides. The sealing strips together with the slave blades and the elastic element form one single sealing unit.
Inventors
- 👤 Heinz-Gunter Ehluss
- 👤 Erich Wessel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:55
CPC Classifications
B; B63; B63H; B63H25/00; B63H25/06; B63H25/08; B63H25/14; B63H25/26; B63H25/28; B63B; B63B39/00; B63B39/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
220 words
A hydraulic rotary-blade pivot drive for hydro-stabilizers and rudder systems, particularly on ships comprising a. a stator having a cylindrical internal surface, b. a rotor mounted in said stator and having a cylindrical external surface, c. a plurality of receiving grooves in at least one of said surfaces and extending along the length thereof, and d. a sealing unit in each of said grooves comprising a longitudinally extending slave blade mounted in each of said grooves for radial displacement and projecting beyond the surface in which each groove is located, and elastic means positioned in said receiving groove between said slave blade and the base of said groove, e. said slave blade including a semi-circular cavity adjacent said elastic means, and f. said elastic means being radially displaceable in said receiving groove to press said slave blade against the surface opposite the surface in which said groove is located, and comprising an elongated resilient member having a generally Ushaped profile with a central web portion and control tongues extending transversely from opposite sides of said web portion, the web portion resting against the base of said groove and said control tongues elastically resiliently fitting into the semi-circular cavity of said slave blade whereby a chamber is formed defined by said resilient member and said semi-circular cavity in said slave blade.
Claim 2
Dependent Claim
220 words
A hydraulic rotary-blade pivot drive for hydro-stabilizers and rudder systems, particularly on ships comprising a. a stator having a cylindrical internal surface, b. a rotor mounted in said stator and having a cylindrical external surface, c. a plurality of receiving grooves in at least one of said surfaces and extending along the length thereof, and d. a sealing unit in each of said grooves comprising a longitudinally extending slave blade mounted in each of said grooves for radial displacement and projecting beyond the surface in which each groove is located, and elastic means positioned in said receiving groove between said slave blade and the base of said groove, e. said slave blade including a semi-circular cavity adjacent said elastic means, and f. said elastic means being radially displaceable in said receiving groove to press said slave blade against the surface opposite the surface in which said groove is located, and comprising an elongated resilient member having a generally Ushaped profile with a central web portion and control tongues extending transversely from opposite sides of said web portion, the web portion resting against the base of said groove and said control tongues elastically resiliently fitting into the semi-circular cavity of said slave blade whereby a chamber is formed defined by said resilient member and said semi-circular cavity in said slave blade.
Claim 3
Dependent Claim
56 words
A rotary-blade pivot drive in accordance with claim 1, wherein said web portion is flexurally rigid and said tongues extend therefrom at substantially right angles with respect to said web portion, the sides of said tongues facing each other being provided with internal linings of soft rubber whereby said tongues are resiliently flexible towards each other.
Claim 4
Dependent Claim
49 words
A rotary-blade pivot drive in accordance with claim 1, further comprising mask supports for sealing the rotor in the axial direction, said mask supports including a cavity therebetween, the web portion of each control tongue being provided with at least one hole whereby said chamber communicates with said cavity.
Claim 5
Dependent Claim
30 words
A rotary-blade pivot drive in accordance with claim 1 wherein said slave blade comprises resilient sealing means positioned against the surface opposite the surface in which said groove is located.
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) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |