Work holders – With fluid means
Patent
1996-12-24
1998-11-17
Smith, James G.
Work holders
With fluid means
269 25, 269 32, 269 37, 269 24, B23Q 300
Patent
active
058365737
ABSTRACT:
A clamping system has a clamping device inserted in an installing hole formed in a fixture base, a cylinder unit for operating a clamp and a detection unit for detecting operation positions of the clamp, both of which are formed in the clamping device. In the fixture base, there are formed clamping fluid supplying passages for supplying clamping fluid and detection fluid supplying passages for supplying detection fluid, in which pressure switches are provided. And also, in the clamping device, there are formed detection fluid supply passages and clamping fluid supply passages. When the clamping device is inserted into an installing hole formed in the fixture base, the clamping fluid supplying passages are communicated with clamping fluid supply passages, and also the detection fluid supplying passages is communicated with the detection fluid supply passages through nozzles formed in the cylinder unit. The nozzles are opened and closed due to a movement of a piston formed in the cylinder unit, so that air pressures in the detection fluid supplying passages change, and operation states of the clamp is detected. Further, each of the units is constructed as a unit, so that it is easy to change the setup due to different workpieces.
REFERENCES:
patent: 3491996 (1970-01-01), Ohrnberger
patent: 3572216 (1971-03-01), Seesody
patent: 4508327 (1985-04-01), Ersoy
patent: 4560152 (1985-12-01), Miller
patent: 4620695 (1986-11-01), Vanistendael
patent: 5161788 (1992-11-01), Guzzoni
patent: 5192058 (1993-03-01), VanDalsem et al.
patent: 5437440 (1995-08-01), Keaton
Hayashi Takaaki
Hayashi Takehiko
Nishikayama Takeshi
Sugita Sentarou
Smith James G.
Toyoda Koki Kabushiki Kaisha
Wilson Lee
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