| 摘要 |
<p>997,109. Fluid-pressure engines. NORDSON CORPORATION. Jan. 30, 1963 [Feb. 8, 1962], No. 3801/63. Heading F1M. A valve controlling the inlet and exhaust of a gaseous fluid double-acting motor comprises interconnected closure members 8, movable between facing pairs of inlet and exhaust valve seats 14, 16 and 15, 17, the exhaust ports 18, 19, beyond the exhaust valve seats being completely unobstructed. The members 8 are carried by a fluted bar 7 actuated by a lever 5 on a spindle 4 having a lever 6, Fig. 1, connected to a toggle linkage 47 actuated by collars 58, 59, on a rod S actuated by the motor piston. Near the end of one piston stroke the collar 59 contacts pin 51 to move the toggle linkage 47 over dead centre, when it causes rapid movement of the valves 8 to reverse the inlet and exhaust connections of the motor. In the position of Fig. 4, pressure fluid, supplied at 10 flows through inlet valve seat 17, to the cylinder port 13, the other port 12 being connected to exhaust port 18. At the end of the piston stroke the valves 8 close ports 18, 17 and open ports 16, 15, whereby port 12 becomes the inlet port and 13 the exhaust and the piston motion is reversed. Specification 748,533 is referred to.</p> |
