Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1986-03-03
1987-11-03
Echols, P. W.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
292835, 72403, B21D 5300, B23Q 300
Patent
active
047035463
ABSTRACT:
A first locator engages lands defining a first groove in a valve core to position that first groove accurately relative to a first pair of notch forming tools. The first pair of notch forming tools then engage axially extending edges of lands defining that first groove to form metering notches. The first locator and first pair of notch forming tools are disengaged from the valve core. Then, a second locator engages lands defining a second groove to accurately position the valve core relative to a second pair of notch forming tools. The second pair of notch forming tools engage the valve core to form metering notches in the edges of lands defining the second groove. The second locator and second set of notch forming tools are retracted from engagement with the valve core. Thus, the metering notches are precisely and independently formed relative to each land.
REFERENCES:
patent: 3800386 (1974-04-01), Bishop
patent: 3921669 (1975-11-01), Goff
patent: 4100785 (1978-07-01), Bishop
patent: 4103407 (1978-08-01), Elizalde et al.
patent: 4203477 (1980-05-01), Bruller et al.
patent: 4442579 (1984-04-01), Millard
patent: 4461163 (1984-07-01), Kralowetz
patent: 4614014 (1986-09-01), Ferguson
Echols P. W.
Golabi Irene Graves
TRW Inc.
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