Expansible chamber devices – Relatively movable working members – Oppositely movable walls of common chamber
Patent
1991-03-13
1991-12-17
Kwon, John T.
Expansible chamber devices
Relatively movable working members
Oppositely movable walls of common chamber
92107, 310 77, 188368, 188369, 188151R, F01B 702, H02K 710
Patent
active
050726510
ABSTRACT:
A direct drive type rotation dividing table includes a dividing table mounted on an output shaft of a rotor which is accommodated in a housing together with a stator. A clamp mechanism for maintaining the dividing table at a stopped position includes a cylinder slidably disposed in the housing in an axial direction and having a radially extending plane portion and a friction surface adapted to contact the output shaft, an elastic member having one end connected to the housing and urging the friction surface of the cylinder to move away from the output shaft, and a piston having an elastically deformable thin plane portion opposing the plane portion of the cylinder and having one side fixed to the housing and the other free end slidable on the inner surface of the slider. The piston has a friction surface which is adapted to contact a backside of the dividing table. A pressure chamber is formed between the opposing plane portions of the cylinder and the piston and, when pressurized fluid is supplied to the pressure chamber, the cylinder is moved while sliding to make its friction surface press against the output shaft. At the same time, the thin plane portion of the piston is deflected in the axial direction to make its friction surface press against the backside to the dividing table to clamp the output table and the dividing table.
REFERENCES:
patent: 2621769 (1952-12-01), Cardwell et al.
patent: 2740512 (1956-04-01), Fischer
patent: 4295633 (1981-10-01), Sigmon
patent: 4429618 (1984-02-01), Klute et al.
patent: 4501980 (1985-02-01), Welburn
patent: 4537410 (1985-08-01), Hiestand
patent: 4625837 (1986-12-01), Zimmer
Denion Thomas
Kwon John T.
Nippon Seiko Kabushiki Kaisha
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