INJECTION LUBRICATOR CONTROLLED BY COUNTING MECHANISM

摘要

Injection Lubricator Controlled By Counting Mechanism In a lubricator which employs an injection pump connected with an air line to a tool by a branch air line through which pulses of air under pressure are transmitted to the pump for operating the same, a pulse counting mechanism interposed in the branch air line and including a first valve which opens the branch air line for operating the pump after each series of pulses of a predetermined number. The first valve carries a check valve operable to relieve the pressure of air trapped in the pump incidental to closing of the branch air line. i.