Patent 7810248 was granted and assigned to Renishaw plc on October, 2010 by the United States Patent and Trademark Office.
A coordinate positioning apparatus has a base a structure and six struts joining the base and the structure. A working volume is defined by the base, structure and six struts. A support member extends from the supported structure. At least one access region is provided into the working volume, the access area being formed between two adjacent struts, the area of the access region being greater than the area between another set of adjacent struts. Access to the working volume is thereby improved.