Patent GB-1047650-A (GB)
Title: Solenoid actuated fluid flow control valve
IPC: G05D16/06
Filed: 1964-10-22
Abstract: 1,047,650. Valves. C. JOHNSON. Oct. 22, 1964 [Nov. 19, 1963], No. 43096/64. Heading F2V. In a solenoid-operated ball valve, the ball 40 is movable into sealing engagement, within sleeve-like member 41, with resilient 0-rings 43, 44, to respectively seal inlet or outlet ports 45, (Fig. 3, not shown), 46 from side ports 47. The bore through member 41 is stepped so that ball 40 is only insertable through port 45 prior to insertion of ring 43 and the outlet end of port 46 is tapered to permit member 23 to displace ball 40 into contact with seat 43 under the action of solenoid armature 16, the movement whereof is transmitted via plunger 17 and member 22, with the seating impact cushioned by a spring 24 interposed between the member 22, which is slidable within cylinder 25 and within a blind bore in member 23, and the closed end of the cylinder 25 which is in turn slidable, against light return spring 27, within fixed cup member 28. The solenoidoperated ball valve may be employed at either end of the spool valve 12 (Fig. 1, not shown), whereby, upon de-energization of solenoid 14, the ball 40 is unseated from ring 43 and seated on ring 44 so that pressure fluid from inlet 30 passes, via annular port 60 and passages through the valve body and passage 69, to ball valve inlet 45 and thence via side ports 47, annular chamber 71 and bores 72 to annular chamber 73 to exert pressure on spool end 59 to displace it from the Fig. 2 position shown whilst, simultaneously, pressure fluid is vented from spool end 58, as the controlling ball valve thereof is unseated upon energization of the solenoid at that end thereof, via ports 47, 46, to the surrounding atmosphere through the space surrounding fixed member 28. In the Fig. 2 position, pressure fluid flows from inlet 30 and outlet 31 to one side of a double-acting piston fluid-motor and is exhausted from the other side thereof via ports 32, 33 and, in the other position of the spool 63 the former side of the fluid motor piston is exhausted via ports 31, 34, and the latter supplied with fluidpressure fluid via port 32. The solenoid-operated ball valve may also be used to displace a spool 79 (Figs. 7-9, not shown), controlling a servomotor, via ball valves 110, 111. In the Figs. 6 and 7 position, pressure fluid from inlet 80 divides to flow in either direction along bore 81 to end chambers 83, 84, through passage 82 and annular chamber 94 into spool chamber 85 to pressure bear upon the small area spool face 86, and also through passage 87 and annular chamber 88 to inlet port 98 of the pilot valve which, in the energized position thereof, connects spool chamber 96, via passage 93, to exhaust. In this position pressure fluid in end chamber 83 flows via ball valve 110 to servomotor port 102 whilst ball valve 111 is seated to direct exhaust from servomotor port 103 to port 105. Upon deenergizing the pilot valve, pressure fluid from inlet 80 is supplied thereby to annular spool chamber 96 to act on large area spool face 97 and overcome the force on smaller spool face 86 whereby the spool 79 is displaced to reverse the direction of the fluid motor, exhausted and supplied respectively via ball valves 110, 111. In a further embodiment (Figs. 10 and 11, not shown), with the solenoid energized to seat ball 124, pressure fluid from inlet 120 divides to flow, via ball valve 126 and port 122, to one side of a fluid motor and, via passages 140, 142, to annular chamber 143 to pressure bear upon small area annular spool face 146 whilst the other side of the fluid motor is vented via port 121 and the ball 124. Upon de-energizing the solenoid, the port 121 is supplied with pressure fluid, via ball 124, which also passes via passages 131, 133 to pressure bear on the larger area spool face 136 which is thereby displaced to seat ball 126 in its other position to exhaust the port 122, via chamber 122a, to port 123. In a further embodiment (Fig. 12, not shown), pressure fluid from inlet 160 divides to feed directly to small area piston face 184 of a fluid motor and, via ball closure 161 with the solenoid de-energized, to large area face 175 to displace the piston 163 to the left. Upon energizing the solenoid the fluid acting on face 175 is vented and the piston 163 displaced to the right.