"That’s an amazing invention, but who would ever want to use one of them?"
President Rutherford B. Hayes ; Said in 1876, after Alexander Graham Bell demonstrated the telephone to him at the White House
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| Number | Title | Issue Date |
| 7426826 | Hydrodynamic machine, for example, hydrodynamic coupling or hydrodynamic brake The invention concerns a hydrodynamic coupling or a hydrodynamic brake with the following features: having an impeller and a turbine wheel, which together form a toroidal working chamber; the impeller sits on a dri... | 09/23/2008 |
| 6928810 | Hydrodynamic component A hydrodynamic component (1) comprising: two rotating blade wheels: a primary blade wheel (3) and a secondary blade wheel (4), which together form at least one torus-shaped working chamber (5Z); at least inlet (10) for service fluid leadi... | 08/16/2005 |
| 6725657 | Power transmission device The present invention relates to a power transmission apparatus for transmitting power by utilizing kinetic energy of a fluid, such as a torque converter, a fluid coupling, or the like. In a power transmission apparatus for taking out kinetic energy given to a fluid... | 04/27/2004 |
| 6101810 | Hydrodynamic coupling having constant quantity of working fluid and valve for displacing working fluid between a working space and a storage space A hydrodynamic coupling having a constant quantity of working fluid, the coupling comprising, a pump wheel and a turbine wheel which together form a working space for a working fluid, a first storage chamber in fluid communication with the working space; ... | 08/15/2000 |
| 5435133 | Hydrodynamic clutch A hydrodynamic clutch with a generally horizontal axis, specifically for underground operation. The clutch includes a primary wheel, a secondary wheel, a housing which comprises two essentially axially perpendicular end walls as well as a peripheral wall ... | 07/25/1995 |
| 4747267 | Hydrodynamic coupling A hydrodynamic coupling, whose degree of filling is determined by a scoop tube, has a plurality of radially arranged elongated depressions on the inner surface of the coupling casing (simultaneously forming a scoop chamber) driven on the primary side. The... | 05/31/1988 |
| 4671061 | Scoop-controlled fluid couplings A scoop controlled fluid coupling has a toroidal working circuit W defined by vaned impeller and runner elements 11,12. Working liquid is supplied to the working circuit W from a rotating reservoir 9 by an adjustable scoop tube 15 having a scooping orific... | 06/09/1987 |
| 4516399 | Hydraulic coupling A hydraulic coupling is disclosed which has a primary bladed wheel and a secondary bladed wheel confining a torus-shaped operating space. A blade-free ram space is provided inside the blading of the primary wheel. A delay chamber rotating with the primary... | 05/14/1985 |
| 4445328 | Variable fill fluid coupling with charging liquid collector In variable fill-type fluid couplings, a driving impeller and a driven runner are coupled for joint rotation by means of a liquid medium in an active liquid chamber formed by the rotating members. The active liquid chamber is continuously bled at a select... | 05/01/1984 |
| 4023362 | Controllable-filling hydrodynamic fluid coupling A scoop-trimmed fluid coupling wherein the transmitted torque decreases continuously with increasing ratio of runner speed to impeller speed at each degree of filling of the working circuit with liquid. During acceleration of the runner, the scoop tube is... | 05/17/1977 |
| 3995424 | Fluid clutches The invention relates to a fluid clutch of the kind comprising cooperating vaned pump and turbine elements between which toroidal power-transmitting liquid vortices are established. At least part of the vanes of one of the elements is movable between clut... | 12/07/1976 |