Patent GB-450595-A (GB)
Title: Improvements in or relating to hydraulic transmission apparatus
IPC: F16H39/32
Filed: 1934-10-17
Abstract: 450,595. Hydraulic transmission of power. GUINNESS, E. E., Allendale, Coalway Road, Wolverhampton, ELWELL, M., The Laurels, Tipton Road, Woodsetton, Staffordshire, and WATTS, R. C., Cleveland Works, Cleveland Road, Wolverhampton. Oct. 17, 1934, Nos. 29730/34 and 16534/35. [Class 69 (ii)] In hydraulic transmission apparatus comprising a vane pump and motor, the pump or both pump and motor being of variable capacity, and maximum power being transmitted when the pump delivery is a maximum, both pump and motor have a plurality of working sections, each working section of the pump being connected to a working section of the motor by separate and independent passages. In the form shown in Figs. 1 and 3, a driving shaft 66 carries two pump rotors 68, 69 working in conjunction with stators 72, 73 above and below the axis of rotation. Vanes are constituted by loosely fitting rollers 71, and the vane recesses are connected by passages 75. Motor rotors 76, 77 mounted on a sleeve 78 rotatable on an extension 79 of the shaft 66 have roller vanes maintained adjacent their stators by cams 87, and are provided with integral flanges 89 ; if desired, the flanges 89 may be omitted and the rollers may be mounted on pins, the ends of which are supported by blocks of arcuate form. Both pump and motor rotors have sealing members 131 forced out by pressure in the vane recesses, and the pump stator has sealing members 134 forced out by the delivery pressure. The pump stators may be adjusted to vary the capacity hydraulically from a source 106, Fig. 5, of pressure and suction under the control of a valve 113, and the motor stators may be similarly adjusted, the cams 87 being then omitted. The pump sections have respectively a suction port 93 and a delivery port 94, and a suction port 95 and a delivery port 96, and the motor sections are each provided as shown in Fig. 2, with a pair of ports for supply and exhaust, all the ports being inclined to avoid sudden changes of direction in the liquid flow. Castings 64 are provided with passages 102 ... 105, to provide separate and independent circuits for correcting a pump section to a motor section. The passages 102 ... 105 are connected to pipes 119 ... 121 depending into a reservoir 92 and fitted with one-way valves 125, and a lever 127 may be operated to determine which pair of valves is to be open. A movable clutch member 147 is provided to obtain interruption of drive or a direct drive to the shaft 145 at will. In another form, the pump and motor each have a single double-acting rotor. In the pump, the rear edge of each recess has a groove 179, Fig. 8, and alternate recesses are connected to one or the other of grooves 177, Fig. 10, in the driving shaft 160. In the motor, the vanes are acted on by cams 193, and the recesses are grooved similarly to the pump recesses and connected to a groove 196. The pump stators are adjusted by linkwork from a slidable rod 204a, and the pump is provided with wedgeshaped abutments 169, 170. The motor has similar abutments, and each working section of the pump is connected to a working section of the motor by passages 197, 198, Fig. 13, in members 159, the suction passage 198 having nipples 207 through which replenishment may be effected. A positive clutch and reversing gearing are provided. In a modification, the reversing gearing is dispensed with, and reverse drive is obtained by means of valves 221, Fig. 14, fitted in the members 159. In the position shown, a passage 231 in the valve connects a suction chamber 224 with a replenishing nipple. In this form, the pump stators are adjusted from a turnbuckle 229. In other forms, the two rotor pump is used with the single rotor motor, or the single rotor pump is used with the two rotor motor. Specification 430,159, [Group XXVI], is referred to.