Patent US3782867A successfully refreshed from Google Patents.
US3782867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid power converter
Assignee: AMERICAN NATIONAL BANK
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Filing: 1972-04-03
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Granted: 1974-01-01
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Expires: 1992-04-03
Abstract
Abstract A fluid power converter, such as a hydraulic fluid pump or motor, having a rotor and stator each having sealing vanes and in which the stator includes a contoured periphery consisting of harmonic curves which reduces rotor vane acceleration and provides a constant output source independent of rotational angle. The rotor periphery consisting of contoured curves shaped to impart harmonic motion to the stator vanes for reducing stator vane accelerations. The rotor and stator vanes having different thicknesses and provided with hydraulic and spring loading with the thicker vanes having a higer loading force thereby preventing destructive detenting of the vanes with respect to each other. Fluid timing plates for the rotor vanes sealing the hydraulic loading fluid in the rotor vane pockets during vane interaction periods for reducing wear and noise of the vane.
Inventors
- 👤 C Gerlach
- 👤 E Schroeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:39
CPC Classifications
F; F01; F01C; F01C21/00; F01C21/08; F01C21/0809; F01C21/0818; F01C21/0854; F01C21/0863; F04; F04C; F04C2/00; F04C2/30; F04C2/34
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
226 words
In a fluid power converter having a rotor and a stator member, the members being concentrically mounted and rotatable one with respect to the other about a common center, said members having opposing peripheries contoured to provide an annular space therebetween, each of said peripheries including a plurality of equispaced radially extending slots receiving a vane therein, there being an even number of both rotor and stator vanes and there being more rotor vanes than stator vanes, a fluid inlet in the stator adjacent one side of each slot therein and opening into the annular space, a fluid outlet in the stator adjacent the second side of each slot therin and opening into the annular space, the improvement comprising, the stator periphery including a plurality of recesses each of which is defined by a harmonic curve having its center coaxial with said common center and having an angular periphEry extent substantially equal to 360* divided by the number of stator vanes, and the rotor periphery includes a plurality of recesses each of which is defined by a curve which is substantially harmonic for imparting harmonic motion to the stator vanes and having its center coaxial with said common center and having an angular periphery extent substantially equal to 360* divided by the number of rotor vanes thereby reducing vane acceleration and providing a constant torque converter.
Claim 2
Dependent Claim
226 words
In a fluid power converter having a rotor and a stator member, the members being concentrically mounted and rotatable one with respect to the other about a common center, said members having opposing peripheries contoured to provide an annular space therebetween, each of said peripheries including a plurality of equispaced radially extending slots receiving a vane therein, there being an even number of both rotor and stator vanes and there being more rotor vanes than stator vanes, a fluid inlet in the stator adjacent one side of each slot therein and opening into the annular space, a fluid outlet in the stator adjacent the second side of each slot therin and opening into the annular space, the improvement comprising, the stator periphery including a plurality of recesses each of which is defined by a harmonic curve having its center coaxial with said common center and having an angular periphEry extent substantially equal to 360* divided by the number of stator vanes, and the rotor periphery includes a plurality of recesses each of which is defined by a curve which is substantially harmonic for imparting harmonic motion to the stator vanes and having its center coaxial with said common center and having an angular periphery extent substantially equal to 360* divided by the number of rotor vanes thereby reducing vane acceleration and providing a constant torque converter.
Claim 3
Dependent Claim
62 words
The apparatus of claim 1 including, means for supplying hydraulic fluid on the back of said rotor and stator vanes, and means for locking the hydraulic fluid on the vanes in one of the rotor and stator in place during the time the rotor and stator vanes cross each other for preventing escape of fluid from the back of the locked vanes.
Claim 4
Dependent Claim
54 words
The apparatus of claim 1 including, the vanes in the stator being of a different thickness than the vanes in the rotor, means for urging the stator and the rotor vanes outwardly from the stator and rotor, respectively, and said means urging the vanes outwardly providing a greater force on the greater thickness vanes.
Claim 5
Dependent Claim
39 words
The apparatus of claim 6 wherein the means urging the stator and rotor vanes outwardly being springs, and the springs urging the greater thickness vanes outwardly having a higher force than the springs urging the lesser thickness vanes outwardly.
Claim 6
Dependent Claim
187 words
In a hydraulic power converter having a rotor and a stator member, the members being concentrically mounted and rotatable one with respect to the other about a common center, said members having opposing peripheries contoured to provide an annular space therebetween, each of said peripheries including a plurality of equispaced radially extending slots receiving a vane therein, a fluid inlet in the stator adjacent one side of each slot therein and opening into the annular space, a fluid outlet in the stator adjacent the second side of each slot therein and opening into the annular space, the improvement comprising, hydraulic fluid applied against the back of the stator vanes and the rotor vanes for urging the stator vanes and the rotor vanes outwardly from the stator and rotor, respectively, and locking means for preventing escape of fluid from the back of the vanes thereby sealing the hydraulic fluid acting on the vanes in one of the rotor and stator in place during the time the rotor and stator vanes cross each other thereby preventing the locked vanes from being pushed into their slots by the other vanes.
Claim 7
Dependent Claim
187 words
In a hydraulic power converter having a rotor and a stator member, the members being concentrically mounted and rotatable one with respect to the other about a common center, said members having opposing peripheries contoured to provide an annular space therebetween, each of said peripheries including a plurality of equispaced radially extending slots receiving a vane therein, a fluid inlet in the stator adjacent one side of each slot therein and opening into the annular space, a fluid outlet in the stator adjacent the second side of each slot therein and opening into the annular space, the improvement comprising, hydraulic fluid applied against the back of the stator vanes and the rotor vanes for urging the stator vanes and the rotor vanes outwardly from the stator and rotor, respectively, and locking means for preventing escape of fluid from the back of the vanes thereby sealing the hydraulic fluid acting on the vanes in one of the rotor and stator in place during the time the rotor and stator vanes cross each other thereby preventing the locked vanes from being pushed into their slots by the other vanes.
Claim 8
Dependent Claim
106 words
The apparatus of claim 5 wherein, the vanes in the stator being of a different thickness than the vanes in the rotor, means for urging the stator and the rotor vanes outwardly from the stator and rotor, respectively, said means urging the vanes outwardly providing a greater force on the greater thickness vanes, and said means for urging the stator and rotor vanes outwardly includes, hydraulic fluid applied against the back of the vanes, and also includes springs applied against the back of the vanes, the springs urging the greater thickness vanes outwardly having a greater force than the springs urging the lesser thickness vanes outwardly.
Claim 9
Dependent Claim
32 words
The apparatus of claim 5 wherein the vanes in the stator being of a different thickness than the vanes in the rotor, and wherein the locking means act on the thinner vanes.
Claim 10
Dependent Claim
66 words
The apparatus of claim 7 wherein the thinner vanes are the rotor vanes and wherein the hydraulic locking means includes a plate on both ends of the rotor having timing ports, said ports positioned between the back of the rotor vanes and high pressure hydraulic fluid, and said ports normally open but being closed during the time when the rotor and stator vanes cross each other.
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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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |