Patent GB-1127123-A (GB)
Title: Improvements in or relating to rotary fluid-actuating motors
IPC: F03C1/00
Filed: 1965-08-21
Abstract: 1,127,123. Rotary fluid-actuated motors; hydraulic apparatus. K. K. KURODA KYOHAN SEISAKUSHO. Aug. 21, 1965 [Aug. 21, 1964; Oct. 8, 1964; Nov. 9, 1964; Feb. 13, 1965], No. 18217/65. Headings F1F and F1P. In a rotary fluid-actuated motor 20, Fig. 2, having two mutually-co-operating rotors, e.g. a pair of externally-meshing gears 20a, 20b, rotation of a power-output shaft 22 to which one of said rotors is attached can be arrested by a rod 24 being slid into engagement with a wheel 23 fixed to said shaft and having a plurality of either teeth or notches in the periphery thereof, Figs. 4 and 6 (not shown), said rod being furnished with a piston 28 that is slidingly lodged in a cylinder 27 to which pressurized fluid can be supplied through holes 43, 44 according to the desired direction in which the rod is to be displaced. If the motor is reversible, two piston-operated rods (28a, 28b), Fig. 5 (not shown), may be provided in place of the rod 24, one rod or the other being used to arrest the rotation of the said shaft according to the direction of rotation. Alternatively, the rod 24 is replaced by two solenoid-operated rods (46a, 46b), Fig. 7 (not shown). The wheel 23 may be dispensed with, the rod, or rods, being arranged to engage with the teeth of one or other of the gears. The number of revolutions of the shaft may be detected by either a photo-electric cell (82a), Fig. 13 (not shown), or a micro-switch (81), Fig. 11 (not shown), operation of said cell being effected by a light-source (91) and perforations (92) in the wheel whereas that of said switch is effected by either a plurality of projections (80) on one side of the wheel engaging with a spring-loaded plunger (84) or a plurality of teeth (80b), Fig. 9 (not shown), on a further wheel (80a) attached to the wheel 23. The motor 20 may be actuated by hydraulic fluid and controlled by a hydraulic system, Fig. 8, which includes a solenoid-operated valve 54 for starting, stopping or reversing the motor, another solenoid-operated valve 68 for controlling the piston 28 aforesaid, a flow-control valve 71 for regulating the output of the motor, a further solenoid-operated valve 70 for by-passing the latter valve when desired, a pump 59 driven by an electric motor 60 and a pressure-relief valve 73. The valve 71 is by-passed by a non-return valve 72 when the flow of hydraulic fluid D is reversed. An electrical circuit, Fig. 9 (not shown), for operating solenoids 66 -- 69 in the valves 54, 68, 70 by means of push-buttons (75 -- 78) is described, and for details thereof the Specification should be referred to. A hydraulic system, Fig. 10 (not shown), for controlling the motor 20 when the latter is provided with the two piston-operated rods (28a, 28b) is similar to that according to Fig. 8, and for details of this system the Specification should be consulted. A pulse-counter (PC), Fig. 14 (not shown), which is connected to the cell (82a) or the switch (81), may be employed to control either a directional flow-control valve (V) for the working fluid of the motor or either of the hydraulic systems according to Figs.8 and 10. The motor may be employed either to drive a lead screw (94), Fig. 15 (not shown), in a machine tool or for displacing wire (96), Fig. 16 (not shown), which is to be cut to desired lengths by shears (98).