Abstract An hydraulic power transmission for a vehicle, such as is used in the building and civil engineering industries, comprises two sets of receivers each supplied by a pump, wherein a speed limiter is disposed in the common return line of the receiver circuits and is piloted, via a shuttle valve, by whichever is the higher of the pump delivery pressures, whereby the receiver set temporarily being supplied on reduced delivery is free to be driven whereas the two receiver sets can, if need be, have their movements braked. This arrangement enables the same pumps which supply the wheel driving motors of the vehicle, to also drive an actuator without the disturbing consequence which has been prevalent hitherto, of one of the receiver sets braking the other.
A hydraulic power transmission which is of use in a vehicle, inter alia building and civil engineering equipment, and which comprises two sets of receivers each supplied by a pump, wherein a speed limiter is disposed in the common return line of the receiver circuits and is piloted, via a shuttle valve, by whichever is the higher of the pump delivery pressures.
Claim 2
Dependent Claim
62 words
A hydraulic power transmission which is of use in a vehicle, inter alia building and civil engineering equipment, and which comprises two sets of receivers each supplied by a pump, wherein a speed limiter is disposed in the common return line of the receiver circuits and is piloted, via a shuttle valve, by whichever is the higher of the pump delivery pressures.
Claim 3
Dependent Claim
52 words
A hydraulic power transmission as set forth in claim 1, wherein the shuttle valve comprises a ball which is disposed in a casing and on which the delivery pressures of the two pumps act through two lines connecting the delivery sides of the pumps to the two inlets of the shuttle valve.