Drive jaws for a pipe and rod pusher device

Details Drive jaws for a pipe and rod pusher device Drive jaws for a pipe and rod pusher device

1975-09-22

1976-10-26

Smith, Al Lawrence

Implements or apparatus for applying pushing or pulling force

Pipe or rod jack

Tie rod tensioner

E21B 1900

Patent

active

039880044

ABSTRACT:
This invention pertains to the drive jaw structure of a device for installing a pipe under a finished surface such as a driveway or street. The drive jaws are each provided with a spring loaded shift lever and a slide bar; one end of the spring is anchored to a slide box structure, carrying the jaw assembly, and the opposed spring end is slidably engaged on the slide bar in a manner whereby proper manipulation of the shift lever will cause the associated drive jaw to be selectively shifted and maintained in a forward or reverse drive attitude.
Both of the drive jaw assemblies are pivotally maintained in position relative to the slide box by means of a single removable rod, extending centrally, longitudinally of the top of the slide box.

REFERENCES:
patent: 2882011 (1959-04-01), Ripstein
patent: 3022042 (1962-02-01), Orcutt
patent: 3645502 (1972-02-01), Stromp, Jr.
patent: 3807695 (1974-04-01), Gremillion et al.

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