| 摘要 |
<p>1,058,983. Valves. DEERE & CO. April 6, 1964 [April 5, 1963], No. 14179/64. Heading F2V. [Also in Division E1] A valve control mechanism for preventing inadvertent operation of an hydraulicallyoperatcd backhoe comprises lugs 50-55 fixed to vertically-reciprocating valve spools 30-35 movable between a neutral and an operating position, and a bar 80 movable by a rod 94 between an inoperative position (Fig. 3) and an operative position (Fig. 5, not shown) in which it locks the lugs against movement when in the neutral position. To move the rod 94 a key 91 inserted in a rod 90 is rotated to cause a pin 92 to cam over surface 100 or 101.</p> |
