Thomas G Hoh
Engineers at Left Hand Cyn, Boulder, CO
License number
Colorado 12800
Issued Date
Sep 21, 1974
Renew Date
Nov 1, 2015
Expiration Date
Oct 31, 2017
Type
Professional Engineer
Address
Address
376 Lefthand Canyon Dr, Boulder, CO 80302
Organization information
See more information about Thomas G Hoh at bizstanding.comThomas G Hoh
376 Lefthand Cyn Dr, Boulder, CO 80302
Industry:
Mfg Plastic Products Engineering Services Mfg Sport/Athletic Goods Mfg Lighting Equipment
Doing business as:
Hoh, Thomas<br>Vacuum Formed Products
Phone:
(303) 449-2590 (Phone)
Managing Directors:
Thomas Hoh (Owner),Russel Nilson Managing Director, inactive
Professional information
Oil Well Pumping Apparatus And Method
US Patent:
4505162, Mar 19, 1985
Filed:
Jul 22, 1982
Appl. No.:
6/400637
Inventors:
Thomas G. Hoh - Boulder CO
Bernard L. Friedman - Carmel Valley CA
Wendall Borchert - Boulder CO
Eugene H. Nixon - Arvada CO
Bernard L. Friedman - Carmel Valley CA
Wendall Borchert - Boulder CO
Eugene H. Nixon - Arvada CO
Assignee:
Advanced Pumping Systems, Inc. - Lafayette CO
International Classification:
F04B 4702
US Classification:
74 41
Abstract:
An oil well pumping apparatus and method has an increased walking beam distance ratio of saddle pivot-polished rod distance (DE) to saddle pivot-equalizer pivot distance (DC) of at least 1. 4:1. A crank arm axis (A) is positioned substantially to the rear of the equalizer pivot (C) and the pitman rod (21) is connected to the crank arm (16) at any selected stroke point along a crank arm wrist pin angle line (AB) offset at an angle (. phi. ) to the center line of the crank arm. A precise counterbalancing is provided by radial adjustability of a weight assembly (17) on the crank arm, a floating safety lock assembly (64), and the addition to or subtraction from auxiliary weights (57) on a main weight member (54). The beneficial results of the present invention include reduction of peak torque requirements, elimination of gear reducer load reversals, and lower sucker rod stress throughout a very wide range of pumping applications with a universal piece of hardware.