The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 16, 1995
Filed:
Mar. 07, 1994
Basil Obrist, Gontenschwil, CH;
Ferdinand Troxler, Schenkon, CH;
Erowa AG, Reinach, CH;
Abstract
An apparatus for clamping a work piece comprises a base and a work piece carrier adapted to be put onto and fixed to the base. The base and the carrier comprise aligning means to align the position of the carrier relative to the base along three perpendicular coordinate axes as well as the angular position. The aligning means comprises first aligning element pairs in the form of cooperating reference surfaces at the carrier and the base, which define the position of the carrier in the Z-axis. The aligning means further comprises second and third aligning element pairs in the form of cooperating linear aligning element pairs, which define the position of the carrier in the X and Y-axes, respectively. The cooperating pairs each comprise a wedge-shaped centering member and a counterpart member with a matching centering slit. Clamping means is provided for clamping the carrier to the base in a well defined position which is defined by the aligning means. The clamping means comprises a plurality of clamping members, each including a pin member fixed to the carrier and a chuck member located in the base. The carrier comprises a flat surface which faces the base if the carrier is clamped to the base. The flat surface forms one of the reference surfaces. Each one member of the second and third pairs is directly connected to the flat surface. Each pin member is also directly connected to the flat surface.