Patent US3593828A successfully refreshed from Google Patents.
US3593828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrodynamic brake
Assignee: Continental Teves AG and Co OHG
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Filing: 1969-09-15
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Granted: 1971-07-20
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Expires: 1989-09-15
Abstract
Abstract A hydrodynamic brake connected with the power train or wheels of an automatic vehicle in which confronting rotors are driven in opposite senses and have interleaved arrays of axially extending vanes circulating the hydrodynamic brake fluid along a closed path in heat-transferring relationship with air induced to flow along the outer wall of the pump housing by blowers connected with the rotor shafts. The decelerator effectiveness is controlled by intercepting in a stepless manner the pumped liquid.
Inventors
- 👤 Hans-Christof Klein
- 👤 Wilhelm Kanpp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:34
CPC Classifications
B; B60; B60T; B60T1/00; B60T1/02; B60T1/08; B60T1/087; F; F16; F16D; F16D57/00; F16D57/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
253 words
A hydrodynamic brake for a vehicle having a body and wheel means, said hydrodynamic brake comprising housing means mounted on said body, a pair of cooperating rotors connected with said wheel means for rotation in opposite senses for circulating a hydrodynamic-brake liquid, and heat-exchanger means for dissipating heat developed in said liquid upon the braking of said wheel means, said rotors having interfitting annular arrays of vanes engaging said fluid, said housing means being of generally toroidal configuration and forming an annular pumping chamber of round section in an axial plane through said housing means, said hydrodynamic brake further comprising an annular slider surrounding said axis and having an axially extending rim axially shiftable into said chamber to intercept the liquid circulating therein, said housing means including a wall axially juxtaposed with said rim and cooperating therewith in a fully inserted position with said slider to completely block said chamber, a compartment within the toroid receiving said slider and provided with a slot open in the direction of said wall to clear said slider and admit said liquid to said compartment, and with an opening communicating between said compartment and said chamber remote from said slot to return the liquid to said chamber upon withdrawal of said slider said rim being disposed radially outwardly of the outermost one of said arrays of vanes, said slider and said housing means being formed within said compartment with mutually engaging screw thread means for axially displacing said rim toward said wall upon rotation of said slider.
Claim 2
Dependent Claim
253 words
A hydrodynamic brake for a vehicle having a body and wheel means, said hydrodynamic brake comprising housing means mounted on said body, a pair of cooperating rotors connected with said wheel means for rotation in opposite senses for circulating a hydrodynamic-brake liquid, and heat-exchanger means for dissipating heat developed in said liquid upon the braking of said wheel means, said rotors having interfitting annular arrays of vanes engaging said fluid, said housing means being of generally toroidal configuration and forming an annular pumping chamber of round section in an axial plane through said housing means, said hydrodynamic brake further comprising an annular slider surrounding said axis and having an axially extending rim axially shiftable into said chamber to intercept the liquid circulating therein, said housing means including a wall axially juxtaposed with said rim and cooperating therewith in a fully inserted position with said slider to completely block said chamber, a compartment within the toroid receiving said slider and provided with a slot open in the direction of said wall to clear said slider and admit said liquid to said compartment, and with an opening communicating between said compartment and said chamber remote from said slot to return the liquid to said chamber upon withdrawal of said slider said rim being disposed radially outwardly of the outermost one of said arrays of vanes, said slider and said housing means being formed within said compartment with mutually engaging screw thread means for axially displacing said rim toward said wall upon rotation of said slider.
Claim 3
Dependent Claim
50 words
A hydrodynamic brake as defined in claim 1 wherein said housing means is formed with ribs, said heat-exchanger means including a shell closely surrounding said ribs and forming coolant channels therewith, and blower means operatively connected with one of said rotors for inducing a flow of air through said channels.
Claim 4
Dependent Claim
23 words
A hydrodynamic brake as defined in claim 2, further comprising planetary gear means coupling said one of said rotors with said blower means.
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) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |