Abrading – Machine – Rotary tool
Reexamination Certificate
2005-08-23
2005-08-23
Ackun, Jr., Jacob K. (Department: 3723)
Abrading
Machine
Rotary tool
C451S332000
Reexamination Certificate
active
06932685
ABSTRACT:
A vertical type of double disc surface grinding machine of the present invention comprises a clamp device which can clamps and holds a work like a brake disc at a correct clamping position under a stable state even when a configuration of a work upper surface is complicated. This machine is equipped with a pair of upper and lower grinding wheels, a work holding jig which is self rotatable, and said clamp device. The clamp device is equipped with a clamp unit freely rotatable through a bearing onto a clamp rod of an elevator actuator. The clamp unit is equipped with a steel ball contacting with a central concave portion of a work upper surface.
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patent: 4760669 (1988-08-01), Maccaferri et al.
patent: 5133155 (1992-07-01), Schwar
patent: 6501636 (2002-12-01), Savas et al.
patent: 6726525 (2004-04-01), Kato et al.
patent: 61-152359 (1996-07-01), None
patent: 10-217080 (1998-08-01), None
Ackun Jr. Jacob K.
Crowell & Morning LLP
Daisho Seiki Corporation
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