Chucks or sockets – With fluid-pressure actuator – Socket type
Patent
1982-07-12
1984-03-20
Briggs, William R.
Chucks or sockets
With fluid-pressure actuator
Socket type
279119, B23B 3114
Patent
active
044376758
ABSTRACT:
A centrifugal force compensated chuck (12) using a moderately sized counterweight (60) and force multiplication to achieve proper compensation. Each counterbalance assembly includes a pair of levers (32, 40) pivotable about a common axis (34). One of the levers (32) is connected through an appropriate mechanical interconnection to an associated chuck jaw (15), the other lever (40) engages a counterweight (60) which moves out from the center of the chuck (12) during rotation. A ratchet (36) and pawl (42) mechanism is provided between the first and second levers. When the chuck (16) is stopped, the counterweight (60), which is spring biased, moves to a position disengaging the ratchet and pawl. With the ratchet and pawl disengaged the pair of levers are free for independent movement about their pivot axis. When the chuck is rotated the counterweight mechanism moves outward and the ratchet (36) and pawl (42) engage causing the pair of levers to move in unison. As the counterweight (60) moves outward the second lever (40 ) engages a sloped surface (42) on the counterweight and transmits compensating force thru the first lever to the chuck jaw (15). In another embodiment the ratchet and pawl assembly can be eliminated and levers (32, 40) can be formed on a common member.
REFERENCES:
patent: 2224639 (1940-12-01), Ward
patent: 2729459 (1956-01-01), Leifer
patent: 3464710 (1969-09-01), Schultz et al.
patent: 3984114 (1976-10-01), Ovanin
patent: 4009888 (1977-03-01), Wallace
patent: 4047723 (1977-09-01), Buck
Briggs William R.
Massung Howard G.
The Warner & Swasey Company
Webb Glenn L.
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