Implements or apparatus for applying pushing or pulling force – Pipe or rod jack – Tie rod tensioner
Patent
1975-06-26
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
039880036
ABSTRACT:
This invention pertains to a guide means for a device used for example to install a pipe under a finished surface such as a driveway or street. The guide means comprises an upper and a lower rear guide roller for a rod or pipe being actuated by the device and two pairs of upper and lower rollers mounted relative to the front of the device. The rear pair of rollers and the two pairs of front rollers are arranged to permit passage between the respective pairs of rollers of a coupling, joining two rod lengths, without said coupling being in contact with more than one roller at any one time.
REFERENCES:
patent: 3645502 (1972-02-01), Stromp
Smith Al Lawrence
Watson Robert C.
Wilson Alfred E.
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