Rotary clamp

Details Rotary clamp Rotary clamp

2005-06-07

2005-06-07

Watson, Robert C. (Department: 3723)

Work holders

With fluid means

Plural positioning means sequentially operated

C269S032000

Reexamination Certificate

active

06902158

ABSTRACT:
A housing (3) has an upper end wall (3a) which supports an upper slide portion (11) of a clamp rod (5) vertically movably. The housing (3) has a lower end wall (3b), a support cylinder (13) of which supports a lower slide portion (12) of the rod (5) vertically movably. The rod (5) is provided with an input portion (14) between the upper slide portion (11) and the lower slide portion (12). A clamp spring (20) connected to the input portion (14) drives the rod (5) downwards for clamping. The lower slide portion (12) has an outer periphery provided with a helical rotary groove (27) and a straight groove (28) which is in upward continuity with the rotary groove (27). A ball (29) engages with the rotary groove (27) and the straight groove (28). The ball (29) is supported by an inner wall (13a) of the support cylinder (13).

REFERENCES:
patent: 3572216 (1971-03-01), Seesody
patent: 4620695 (1986-11-01), Vanistendael
patent: 5192058 (1993-03-01), VanDalsem et al.
patent: 5820118 (1998-10-01), Craft
patent: 5927700 (1999-07-01), Yonezawa
patent: 5954319 (1999-09-01), Yonezawa
patent: 6113086 (2000-09-01), Yonezawa
patent: 0 802 330 (1997-10-01), None
patent: 0 819 501 (1998-01-01), None

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