| 摘要 |
767,211. Bolt-hole bushes. CROSS MANUFACTURING CO. (1938), Ltd. March 25, 1955 [March 24, 1954], No. 8591/54. Class 89 (1). [Also in Group XXXIV] A bolt-hole bush for lining a hole 2 in a machine or other part 1 to receive a pin, bolt, &c., comprises a wire coil 4 providing on its exterior a screw-thread 3 engaging a similar thread in part 1, and on its interior a parallel bore 5. A groove may be formed in the face 5a of the wire along the entire length of the coil to serve as a lubricant reservoir. |
