Support jack more particularly adapted to support a tool holder

Details Support jack more particularly adapted to support a tool holder Support jack more particularly adapted to support a tool holder

1978-04-21

1980-04-15

Cohen, Irwin C.

Expansible chamber devices

With removal conduit for liquid seepage from expansible chamber

51109R, 511659, 91 52, 92162R, 92165R, B24B 702, F01B 3100

Patent

active

041977866

ABSTRACT:
The support jack comprises a cylinder and a piston which define therebetween a variable-volume chamber. An inlet aperture and an outlet aperture for control fluid are provided for the chamber. Escape passageways are provided in evenly-spaced relation about the rod of the piston and put the chamber in communication with the annular space between the fixed and moving component parts of the jack and open radially onto said space. These passageways create pressure drops which are higher than the pressure drops due to the annular space.

REFERENCES:
patent: 17855 (1857-07-01), Gale
patent: 268684 (1882-12-01), Jones
patent: 1524786 (1925-02-01), Vendeuil
patent: 2291243 (1942-07-01), Levy
patent: 3663071 (1972-05-01), Kates
patent: 4026562 (1977-05-01), Sparrow

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