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. 01, 2012
Filed:
Mar. 16, 2010
Akira Yamada, Toyonaka, JP;
Akira Yamada, Toyonaka, JP;
Other;
Abstract
A passage block coupling apparatus is provided with a bolt insertion holeand a pin insertion holeformed in an upper-stage passage block, a screw holeand a non-screw holethat are formed in a lower-stage passage block, a boltthat is inserted into the bolt insertion hole, and threaded with the screw hole, and a positioning pinthat is inserted to the pin insertion hole, with its lower end portion being fitted to the non-screw hole. A cut-out sectionis formed near the lower end portion of the positioning pin, and a protruding portionto be fitted to the cut-out sectionis formed on the opening portion of the non-screw hole. A tightening force exerted by the boltand a force exerted by the lower end portion of the positioning pinto press the protruding portionof the non-screw holeupward are balanced with each other so that an evenly fastened state is achieved so that the passage blocksandare coupled with each other.