Patent US3978570A successfully refreshed from Google Patents.
US3978570A
Expired / Lapsed
US
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Method of manufacturing a rotor for vane type engines
Assignee: ITT Inc
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Filing: 1974-08-02
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Granted: 1976-09-07
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Expires: 1994-08-02
Abstract
Abstract Disclosed are a rotor and a method for manufacturing a rotor for vane-type engines. The rotor includes radial slots which guide vanes extending from spring chambers within the rotor. In the practice of the method: (a) radial bores are provided in rotors to receive springs and serve as spring chambers, (b) longitudinal bores are formed in the rotors parallel to the rotor axes and intersecting the radial bores, (c) springs are placed in the spring chambers (radial bores) to extend into the longitudinal bores, (d) the radial bores are partially closed on the outside by plastic deformation of the rotor material, and (e) radial slots are formed parallel to the rotor axes to intersect the radial bores and permit vanes to extend therethrough.
Inventors
- 👤 Klaus Winter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:50
CPC Classifications
F; F01; F01C; F01C21/00; F01C21/08; F01C21/0809; F01C21/0818; F01C21/0827; F01C21/0845; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49231; Y10T29/49234
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
155 words
A method for manufacturing a rotor for vane-type engines having radial slots for guiding vanes which project into spring chambers provided inside the rotor and containing springs assisting the vanes in extending into a space where the diameter of the springs is chosen to exceed the width of the slots, comprising the steps of providing radial bores in rotors to serve as spring chambers, closing the bores by plastic deformation of rotor material at the surface of the rotor, providing radial slots which run parallel to the rotor axis to intersect the radial bores, said radial slots being formed in a manner to enable them to serve as guides for vanes and permit movement of the vanes, providing longitudinal bores running parallel to the rotor axis, in which bores the radial bores terminate, and which form the bottom chambers for the vanes, placing springs in said radial bores, and placing vanes in said radial slots.
Claim 2
Independent Claim
155 words
A method for manufacturing a rotor for vane-type engines having radial slots for guiding vanes which project into spring chambers provided inside the rotor and containing springs assisting the vanes in extending into a space where the diameter of the springs is chosen to exceed the width of the slots, comprising the steps of providing radial bores in rotors to serve as spring chambers, closing the bores by plastic deformation of rotor material at the surface of the rotor, providing radial slots which run parallel to the rotor axis to intersect the radial bores, said radial slots being formed in a manner to enable them to serve as guides for vanes and permit movement of the vanes, providing longitudinal bores running parallel to the rotor axis, in which bores the radial bores terminate, and which form the bottom chambers for the vanes, placing springs in said radial bores, and placing vanes in said radial slots.
Claim 3
Dependent Claim
26 words
The method as claimed in claim 1, in which the springs are placed in the longitudinal bores and then allowed to extend into the radial bores.
Claim 4
Independent Claim
74 words
A method for manufacturing a rotor for vane-type engines comprising providing a rotor having a substantially cylindrical surface, providing extensions to the cylindrical surface adjacent to radial bores forming spring chambers in the rotor, where the material of said extensions corresponds in volume to that required to partially close the bores, inserting springs within the radial bores, plastically deforming the extensions to complete the spring chambers, and placing vanes within the partially closed bores.
Claim 5
Independent Claim
74 words
A method for manufacturing a rotor for vane-type engines comprising providing a rotor having a substantially cylindrical surface, providing extensions to the cylindrical surface adjacent to radial bores forming spring chambers in the rotor, where the material of said extensions corresponds in volume to that required to partially close the bores, inserting springs within the radial bores, plastically deforming the extensions to complete the spring chambers, and placing vanes within the partially closed bores.
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) | 1979-09-07 | 1980-03-08 | 1980-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-07 | 1984-03-08 | 1984-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-07 | 1988-03-08 | 1988-09-07 | $7700.00 | Window Closed / Lapsed |