Plastic article or earthenware shaping or treating: apparatus – With means lubricating cooperating apparatus parts
Reexamination Certificate
2007-05-29
2007-05-29
Mackey, James P. (Department: 1722)
Plastic article or earthenware shaping or treating: apparatus
With means lubricating cooperating apparatus parts
C425S451600, C425S593000
Reexamination Certificate
active
10878298
ABSTRACT:
The purpose of the invention is to prevent a sticking of lubricant to a ball screw shaft and a scattering to the circumstance in an electromotive toggle mold clamping device.This invention relates to the electric motor driven toggle mold clamping device wherein a ball nut member is screwed together to the ball screw shaft which rotates by an electric motor to advance and retreat freely and a cross head is fixed to the ball nut member, a cylindrical or polygonal cylindrical member which has a cylindrical body shape or square cylindrical body shape with a length and a size of placing the ball screw shaft with a required gap while retreating the cross head, is attached to the front ends of the cross head concentrically with the ball screw shaft. The ball screw shaft protruding from the cross head is placed in the cylindrical or polygonal cylindrical member having a required gap.
REFERENCES:
patent: 2403092 (1946-07-01), Lear
patent: 3508300 (1970-04-01), Allard et al.
patent: 6711963 (2004-03-01), Yabe
patent: 6865963 (2005-03-01), Takanohashi et al.
patent: 3199363 (2001-06-01), None
patent: 2001-248707 (2001-09-01), None
patent: 2003-083416 (2003-03-01), None
Shimizu Keizou
Shiozawa Fumio
Mackey James P.
Nissei Plastic Industrial Co. Ltd.
Weingarten Schurgin, Gagnebin & Lebovici LLP
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