US Patent Issued to TRC Services on April 7 for "Multi-bolt clamshell retainer for wristpin on rod pump unit" (Canadian, American Inventors)

ALEXANDRIA, Va., April 7 -- United States Patent no. 12,595,791, issued on April 7, was assigned to TRC Services Inc. (The Woodlands, Texas).

"Multi-bolt clamshell retainer for wristpin on rod pump unit" was invented by Darius J. Yakimchuk (St Albert, Canada) and Robert G. McDonald (Argyle, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "An assembly connects a pitman arm to a slot in a crank arm of a pumping unit. A pin extends from the pitman arm disposed on a first side of the crank arm. The pin is disposed in the slot of the crank arm and has a distal end exposed on a second side of the crank arm. The distal end defines an external shouldered profile. A clamp is positioned on the distal end of the pi...