Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1987-02-24
1988-09-06
Echols, P. W.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
29558, 72370, B21D 5300
Patent
active
047682680
ABSTRACT:
A method for manufacturing a single-piece type valve sleeve, includes plastic-working a workpiece thereby to form in the workpiece a blind bore and a plurality of grooves in the surface of the bore and extending lengthwise of the bore, plastic-working a portion of the workpiece at the bottom of the bore so as to form a through hole in the workpiece, and plastic-working an inner portion of the workpiece adjacent the mouth of the bore thereby to close one end of the grooves. A single-piece type valve sleeve is produced by the method.
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Ishihara Masahito
Iwata Masahito
Cuda Irene
Echols P. W.
Tokai TRW & Co. Ltd.
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