Rotary clamp
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United States of America Patent
Stats
-
Dec 23, 2003
Grant Date -
Oct 9, 2003
app pub date -
Nov 18, 2002
filing date -
Apr 3, 2002
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A housing (3) has an upper end wall (3a) and a lower end wall (3b) which support an upper slide portion (11) and a lower slide portion (12) of a clamp rod (5) vertically movably, respectively. The rod (5) is moved downwards for clamping through a clamp spring (20). The lower slide portion (12) has an outer periphery provided with guide grooves (26), each of which comprises a helical rotary groove (27) and a straight groove (28), peripherally in plural number. Engaging balls (29) which are fitted into the respective guide grooves (26) are rotatably supported by through holes (31) provided in an upper portion of the lower end wall (3b). A sleeve (35) is externally fitted over the engaging balls (29) rotatably around an axis.
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