Glenn Harold Middleton - The Woodlands TX, US David Eugene Lemier - Houston TX, US
International Classification:
E21B 43/00 B23P 15/00
US Classification:
166 901, 166268, 29888021
Abstract:
A collar assembly for inclusion with, or for a retrofit of, a chemical injection pump and method for manufacturing same. The collar assembly secures to a thrust rod of the chemical injection pump and may include a circular member having a central opening and a second opening offset from the central opening. The second opening receives a central portion of a continuous U-shaped member, wherein fingerlike extensions at opposite ends of the U-shaped member flank a toggle element of a switching mechanism. The fingerlike extensions actuate the toggle element so as to stroke the chemical injection pump. The collar assembly includes a reduced number of parts and a simplified manufacturing process.
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