US3940929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrodynamic transmission system
Assignee: Individual
•
Filing: 1974-12-03
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Granted: 1976-03-02
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Expires: 1994-12-03
Abstract
Abstract The invention relates to a hydrodynamic transmission system comprising at least one pump and a bladed turbine arranged to form a toroidal fluid circuit. The leading edges of the blades of the pump and turbine are inclined relative to the corresponding radial plane, and the blades are designed in such a way as to extend the path followed by the streams of fluid nearest the centre relative to the path followed by the streams of fluid furthest away from the centre. There is thus obtained a reduction in the shock and friction losses to improve performance and increase the starting torque. Disclosed application is to automobile vehicles.
Inventors
- 👤 Alexandre Bezimensky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:04
CPC Classifications
F; F16; F16D; F16D33/00; F16D33/18; F16D33/20; F16H; F16H41/00; F16H41/24
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
80 words
A hydrodynamic transmission system comprising at least one pump and a bladed turbine arranged to form a toroidal fluid circuit, wherein the leading edges of the blades of the pump and turbine are inclined relative to the corresponding radial plane, and wherein these blades are designed in such a way as to extend the path followed by the streams of fluid nearest the centre in relation to the path followed by the streams of fluid furthest away from the centre.
Claim 2
Dependent Claim
80 words
A hydrodynamic transmission system comprising at least one pump and a bladed turbine arranged to form a toroidal fluid circuit, wherein the leading edges of the blades of the pump and turbine are inclined relative to the corresponding radial plane, and wherein these blades are designed in such a way as to extend the path followed by the streams of fluid nearest the centre in relation to the path followed by the streams of fluid furthest away from the centre.
Claim 3
Dependent Claim
49 words
A hydrodynamic transmission system as claimed in claim 1, wherein the inclination of the leading edges of the blades of the turbine at least is directed towards the rear of the direction of rotation, starting from the point at which they are closest to the centre of the system.
Claim 4
Dependent Claim
36 words
A hydrodynamic transmission system as claimed in claim 1, wherein the angle of inclination of the leading edges is between 40° and 75°, as measured in relation to the median radial plane of each of them.
Claim 5
Dependent Claim
42 words
A hydrodynamic transmission system as claimed in claim 1, more especially a torque converter comprising a reaction member mounted for free rotation, wherein the leading edges of the blades of the reaction member are inclined in relation to the corresponding radial plane.
Claim 6
Dependent Claim
43 words
A hydrodynamic transmission system as claimed in claim 4, wherein the angle of inclination of the leading edges of the blades of the reaction member is between 40° and 60°, as measured in relation to the median radial plane of each of them.
Claim 7
Dependent Claim
56 words
A hydrodynamic transmission system as claimed in claim 4, wherein the inclination of the leading edges of the blades of the reaction member is directed towards the front of the direction of rotation of the reaction member mounted for free rotation, starting from the point at which they are closest to the centre of the system.
Claim 8
Dependent Claim
27 words
A hydrodynamic transmission system as claimed in claim 1, wherein the turbine is designed to consume the increase in energy obtained in the system as a whole.
Claim 9
Dependent Claim
22 words
A hydrodynamic transmission system as claimed in claim 7, wherein the turbine comprises means for reducing the flow cross-sections for the fluid.
Claim 10
Dependent Claim
52 words
A hydrodynamic transmission system as claimed in claim 8, wherein said means for reducing the flow cross-sections for the fluid consist of an intermediate shell between an inner shell and an outer shell for fixing the blades, the intermediate shell being formed with slots by which it is fixed to the blades.
Claim 11
Dependent Claim
28 words
A hydrodynamic transmission system as claimed in claim 9, wherein the intermediate shell is designed in such a way as to surround the inner shell of the turbine.
Claim 12
Dependent Claim
32 words
A hydrodynamic transmission system as claimed in claim 9, wherein the intermediate shell is kept by springs in the position in which the opening of the flow cross-sections is at its greatest.
Claim 13
Dependent Claim
34 words
A hydrodynamic transmission system as claimed in claim 11, wherein the springs are arranged between the inner shell and that part of the intermediate shell which surrounds the inner shell externally of the blades.
Claim 14
Dependent Claim
54 words
A hydrodynamic transmission system as claimed in claim 10, wherein a bellows forming a spring for positioning the intermediate shell in dependence upon the pressure of the fluid admitted into the system is arranged between the inner shell and that part of the intermediate shell which surrounds the inner shell externally of the blades.
Claim 15
Dependent Claim
49 words
A hydrodynamic transmission system as claimed in claim 10, wherein axial guide means are provided between the intermediate shell and the inner shell of the turbine externally of the blades, and wherein that part of the blades corresponding to the possible travel of the intermediate shell also extends axially.
Claim 16
Dependent Claim
104 words
A hydrodynamic transmission system as claimed in claim 10, wherein there is provided between the intermediate shell and the inner shell of the turbine, externally of the blades, a connection comprising at least three stirrups with two arms articulated at their ends along two axes converging at a point of the axis of the turbine, one of said axes being integral with the internal shell whilst the other extends through the wall of a ring having a sliding connection with the intermediate shell, this axis being engaged in an element forming with it a brace designed to be oriented about its own geometric axis.
Claim 17
Dependent Claim
92 words
A hydrodynamic transmission system as claimed in claim 1, comprising an intermediate turbine with variable-pitch blades between the aforementioned pump and turbine, and means for adjusting the pitch of the blades, wherein said adjusting means comprise a ring mounted with a degree of freedom of angular movement relative to the turbine governed by the compression or expansion of a bellows forming a spring for positioning said ring in dependence upon the pressure of the fluid admitted into the system, said ring comprising individual connections with individual pitch-orienting levers integral with the blades.
Claim 18
Dependent Claim
91 words
A hydrodynamic transmission system as claimed in claim 16, wherein the ring is connected to a support integral with the intermediate turbine by at least three stirrups with two arms articulated at their ends, on the one hand along an axis integral with said support and, on the other hand, along an axis extending through the wall of said ring, the ring having a sliding connection with a ring supporting the bellows, the bellows being annular in shape and arranged between said bellows-supporting ring and a supporting ring on said support.
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) | 1979-03-02 | 1979-09-01 | 1980-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-02 | 1983-09-01 | 1984-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-02 | 1987-09-01 | 1988-03-02 | $7700.00 | Window Closed / Lapsed |