Device for detecting operation of clamp
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United States of America Patent
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Oct 23, 2012
Grant Date -
Mar 18, 2010
app pub date -
Feb 19, 2008
filing date -
Feb 23, 2007
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A clamp rod (5) is vertically movably inserted into a housing (3), and a detection hole (58) is formed in a lower end wall (3b) of the housing (3), substantially concentrically with an axis of the clamp rod (5). An inlet hole (71, 72) for supplying compressed air is opened in a peripheral surface of the detection hole (58). Into the detection hole (58), a detection member (62) is fitted vertically movably, the detection member (62) having a closing surface (68) which closes an opening portion (71a, 72a) of the inlet hole (71, 72), and a recessed portion (69) through which the opening portion (71a, 72a) is communicatively connected to outside air. The detection member (62) is connected to a downward projecting portion (5a) of the clamp rod (5). The detection member (62) is urged by an elastic member (91) toward the opening portion (71a, 72a).
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