GB1213671A - Improvements in or relating to remote hydraulic control devices - Google Patents

Abstract

1,213,671. Telemotor systems. BENNES MARREL. Feb.9, 1968 [Oct.9, 1967], No.6477/68 Heading F1P. [Also in Division F2] A remote hydraulic control system comprises a distributer slide valve D controlling the supply and return of fluid to a circuit (not shown) and a telemotor system having an oil filled emitter unit K which supplies oil to and receives oil from a receiver unit C arranged to operate the slide valve D. In the embodiment shown the slide 117 is urged to a neutral position by a spring centring arrangement E 117 and the receiver C, is in the form of a double acting piston 127 movable in a cylinder 128 in response to oil supplied to one side and discharged from the other side through lines 37, 39 connected to the emitter K. In an alternative arrangement, Fig. 8 (not shown) the receiver unit is in the form of two single-acting pistons, one for each end of the slide 117. The emitter K comprises two cylinders 6 each containing a piston loaded by a spring 13 and having an axial bore therethrough which provides, in the inoperative position, communication between the lines 37, 39 and the oil 100 in the emitter casing. When a hand lever 114 is rotated, a rocking arm 112 is pivoted to cause displacement of one or other of plungers 107. The plunger 107 displaced, abuts its opposing piston and closes the bore therethrough, whereby oil is forced through the appropriate line 37 or 39 to cause operation of the receiver unit C. Oil returning to the emitter through the space between the undisplaced plunger and the associated piston. An arrangement (see Div. F2) comprising two emitters formed intoa single body provided with a common hand lever for simultaneous or with a common hand lever for simultaneous or separate operation of two receivers is described, Figs. 10-17 (not shown).