Pumping Assembly (Patent No: 573030)

Inventor: Elves, Douglas C.

Location: Edmonton

Comments: N/A

Description: The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

1. In a pump rod reciprocating assembly having a pair of parallelly arranged upright cylinders, a piston in each cylinder having a piston rod, a beam connecting said piston rods together for simultaneous movement, and a hydraulic fluid line communicating with the space below said pistons in both said cylinders, a pump connected to said line for forcing fluid under pressure to said cylinders to impart an upward stroke to said pistons and beam, a hydraulic circuit connected to said pump, a main control valve in said line and circuit and operable to divert fluid from said line to said circuit to permit a downward stroke of said pistons and beam, a pilot valve hydraulically connected to said main valve to actuate said main valve and having an operating plunger and trip mechanism for operating said pilot valve comprising a trip rod fixed to said beam and reciprocal therewith, a plunger-engaging member carried by said trip rod and having an enlarged portion arranged to depress said plunger on engagement therewith.

2. In a pump rod reciprocating assembly having a pair of parallelly arranged upright cylinders, a piston in each cylinder having a piston rod, a beam connecting said piston rods 'together for simultaneous movement, and a hydraulic fluid line communicating with the space below said pistons in both said cylinders, said cylinders having a communicating fluid passage adjacent their upper ends, a pump connected to said line for forcing fluid under pressure to said cylinders to impart an upward stroke to said pistons and beam, a hydraulic circuit connected to said pump, a main control valve in said line and circuit and operable to divert fluid from said line to said circuit to permit a downward stroke of said pistons and beam, a pilot valve mounted on said cylinders adjacent the upper end thereof and having an operating plunger, said pilot valve being hydraulically connected to said main valve to actuate said main valve, and trip mechanism for operating said pilot valve comprising a trip rod fixed to said beam and reciprocal therewith, a sleeve on said trip rod and having adjustable reciprocating movement therewith, said sleeve being in engagement with said plunger and having an enlarged diameter portion arranged to depress said plunger on engagement therewith.

3. In a pump rod reciprocating assembly having a pair of parallelly arranged upright cylinders, a piston in each cylinder having a piston rod, a beam connecting said piston rods together for simultaneous movement, and a hydraulic fluid line communicating with the space below said pistons :In both said cylinders, a pump connected to said line for forcing fluid under pressure to said cylinders to impart; an upward stroke to said pistons and beam, a hydraulic circuit connected to said pump, a main control valve in said line and circuit and operable to divert fluid from said line to said circuit to permit a downward stroke of said pistons and beam, a pilot valve hydraulically connected to said main valve to actuate said main valve and having an operating plunger, trip mechanism for operating said pilot valve comprising a trip rod fixed to said beam and reciprocal therewith, and a plunger-engaging member carried by said trip rod and having an enlarged portion arranged to depress said plunger on engagement therewith, a pressure vessel in said hydraulic circuit arranged to maintain a predetermined pressure therein, and a fluid reservoir tank open to atmosphere and having a hydraulic fluid connection with said pilot valve.

4. In a pump rod reciprocating assembly having a source of pressure, a hydraulic fluid line and a hydraulic fluid circuit each connected to said source of pressure, a pair of parallelly arranged upright cylinders, a piston in each said cylinder having a piston rod, a beam connecting said piston rods together for simultaneous movement, said hydraulic fluid line communicating with the space below said pistons in both said cylinders, said cylinders having a communicating fluid passage adjacent their upper ends, a main control valve in said line and circuit and operable to divert fluid from said line to said circuit to permit a downward stroke of said pistons and beam, a pilot valve mounted oh said cylinders adjacent the upper end thereof and having an operating plunger said pilot valve being hydraulically connected to said main valve to actuate said main valve, and trip mechanism for operating said pilot valve comprising a trip rod fixed to said beam and reciprocal therewith, a sleeve on said trip rod and having adjustable reciprocating movement therewith, said sleeve being in engagement with said plunger and having an enlarged diameter portion arranged to depress said plunger on engagement therewith.

Alex. E. MacRae
56 Sparks Street,
Ottawa, Ontario, Canada
Patent Agents for Applicant.