Heavy duty pump jack

Details Heavy duty pump jack Heavy duty pump jack

1985-03-22

1986-07-01

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Pole or strand grasping-type climber

Alternate grasping

182132, 182145, 248246, E04G 120

Patent

active

045974713

ABSTRACT:
A pump jack arrangement for traveling up and down a pole including a frame member upper and lower shackle members supported by the frame member. A pump arm and a support arm are provided for supporting weights. The pump arm is utilized for causing the shackle members to alternately grip the pole. The non-gripping shackle member is stepped upwardly along the pole. The upper and lower shackles include pivotally interconnected yoke members and linkage members which are pivotally connected utilizing the rear gripping rod of the yoke member itself as the pivot. The pump jack is formed of U-shaped channels in order to provide additional supports. The support arms themselves also comprise opposingly interfitted U-shaped channels to provide a slidable support arm. A guard plate is provided over the front gripping rod of the upper shackle.

REFERENCES:
patent: 890804 (1908-06-01), Shears
patent: 1366487 (1921-01-01), Pitou
patent: 1441806 (1923-01-01), Hoitsma
patent: 2424115 (1947-07-01), Powell
patent: 3340961 (1967-09-01), Provaznik
patent: 4382488 (1983-05-01), Anderson
patent: 4407418 (1983-10-01), Brammer
patent: 4463828 (1984-08-01), Anderson

Affiliated with

Also associated with

Rating

Heavy duty pump jack does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Heavy duty pump jack, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Heavy duty pump jack will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1077607