Patent ID: 7238918

Claim:
A welding gun power pin for attaching a welding gun to a power block of a welding system, said welding gun power pin comprising: (a) a pin body which is generally cylindrical and has a first end and a second end, said first and second ends generally defining a length dimension therebetween, said pin body further having an outer diameter width dimension and an outer circumferential surface; (b) an insertion stop member communicating with, and extending axially outwardly from said pin body adjacent said first end of said pin body, said insertion stop member having a width dimension and a shoulder surface which extends generally radially outwardly from said pin body outer circumferential surface; (c) a withdrawal stop member communicating with, and extending axially outwardly from, said second end of said pin body, said withdrawal stop member having a first end and a second end, said first and second ends generally defining a length dimension therebetween, and (d) a channel which extends into said second end of said pin body and adjacent said withdrawal stop member and having a first channel sidewall and a second channel sidewall, said first and second channel sidewalls generally spaced from each other along the length of said pin body and defining a channel width dimension therebetween and each of said first and second channel sidewalls having an outermost portion which is proximate said pin body outer circumferential wall and an innermost portion which extends relatively furthest into said pin body; wherein a magnitude of the length dimension of said withdrawal stop member is greater than a magnitude of the channel width dimension of said channel.