Fastener dispensing apparatus

Claim 1

In an apparatus for dispensing fastener attachment members, said apparatus having a housing, a telescoping member supported by said housing and movable between a retracted position and an extended position relative to said housing, said telescoping member having means for supporting a needle through which a fastener attachment member portion is to be dispensed, the improvement comprising a support member coupled to said housing and having a bore, a pressure sensor member having a portion thereof slidable within the bore, said pressure sensor member portion within the bore having a bore and a first elongated slot which in part extends into the bore, a pin having a portion thereof positioned within the first slot of the sensor member, said pin supporting a disc for movement into said sensor member bore to prevent slidable motion of said pressure sensor member within said support member bore and out of said sensor member bore to to permit slidable motion of said pressure sensor member, spring means supported by said apparatus and engaging said disc to urge said disc into said bore, and in which said pressure sensor member engages a valve to open same to cause energy to be applied to drive said telescoping member to an extended position.