Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1983-07-13
1985-03-26
Moon, Charlie T.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
29157C, 291571R, 29421R, 29421M, 62511, 62527, 138 42, 138149, 251126, B21D 5300, B21K 2900, B23P 1526
Patent
active
045064237
ABSTRACT:
A fluid pressure reducing device having a core provided with a peripheral spiral groove and a pipe receiving the core. The portion of the pipe receiving the core is radially contracted so that the ridges of the spiral groove of the core intrude into the inner peripheral surface of the pipe, thereby to form a spiral passage between the pipe and the core. The pressure of a fluid is reduced as the latter flows through the spiral passage. This fluid pressure reducing device is easy to produce and permits an easy fine adjustment of the flow resistance.
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Asao Hiroshi
Nakamura Keiichi
Ochiai Izumi
Okada Ken'ichi
Wakabayashi Yoichi
Hitachi , Ltd.
Moon Charlie T.
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