F - Mech Eng,Light,Heat,Weapons – 01 – B
Patent
F - Mech Eng,Light,Heat,Weapons
01
B
F01B 1/02 (2006.01) B65G 25/06 (2006.01)
Patent
CA 2088722
The piston rods (10, 12, 14) of three linear hydraulic motors (M1, M2, M3) are stationary and include fluid pressure passageways (40, 52, 42, 54, 44, 56) which direct fluid pressure into and out from working chambers (16, 34, 18, 36, 20, 38) on opposite sides of piston heads (22, 24, 26). Movable cylinder barrels (16, 18, 20) are connected to a load, e.g. floor members (FM1, FM2, FM3) of a reciprocating floor conveyor (Fig. 18). The outer ends of the piston rods (10, 12, 14) include balls and the balls include ports (46, 58, 48, 60, 50, 62) through which fluid pressure is delivered or removed. Associated with each port is a limit valve LV1, LV2, LV3, LV4, LV5, LV5. Limit valves (LV1, LV2, LV3) are pushed into an open position by a retraction of the motors (M1, M2, M3). Limit valves (LV4, LV5, LV6) are pulled into an open position by extension of motors (M1, M2, M3). The limit valves (LV1, LV2, LV3, LV4, LV5, LV6) include springs biasing them into closed positions. The push and pull forces are in a direction opposite this spring force. Limit valves (LV1, LV2, LV3, LV4, LV5, LV6) are also opened by line pressure when flow is in a direction opposing the spring force. The system includes a two position switching valve (SV) controlled by a two position pilot valve (PV). The system operates to move the motors (M1, M2, M3) in unison, in a first direction, and to retract them sequentially. The system is reversible.
Foster Raymond Keith
Gowling Lafleur Henderson Llp
LandOfFree
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