Work holders – With fluid means – Cylinder-piston means in series with additional positioning...
Patent
1976-11-29
1977-10-18
Watson, Robert C.
Work holders
With fluid means
Cylinder-piston means in series with additional positioning...
269157, 269224, 269238, 269254CS, 269285, B23Q 308
Patent
active
040542807
ABSTRACT:
A spring box assembly for use in clamping mechanisms of the over-center type comprises two nested metal housings, at least one spring located between such housings, and means for resiliently holding said housings together with a predetermined initial tension applied to the spring. In a preferred embodiment, at least one metal pin is secured at one end to the bottom of the inside housing and slip fitted in holes in the outside housing at its other end, a helical spring is located around such pin and means are mounted on the other end of such pin for holding the two nested housings together with a predetermined initial tension applied to such spring.
REFERENCES:
patent: 2311525 (1943-02-01), Ebbs
patent: 3292903 (1966-12-01), Meyer et al.
Noranda Mines Limited
Watson Robert C.
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