Bolt tensioning apparatus

Details Bolt tensioning apparatus Bolt tensioning apparatus

1975-09-16

1976-12-07

Smith, Al Lawrence

Implements or apparatus for applying pushing or pulling force

Pipe or rod jack

Tie rod tensioner

81 5738, E21B 1900

Patent

active

039958280

ABSTRACT:
A bolt tensioner has a cylinder and piston assembly whose piston is connected to a puller bar on which is mounted a socket formed with segments for connecting the puller bar to a bolt to be tensioned, and the inner surface of a sleeve reciprocable on said puller bar and the outer surfaces of said segments have coactive circumferential ridges and grooves with beveled sides to actuate and hold the segments into cooperative relation to the bolt and means to actuate the segments out of said cooperative relation upon movement of the sleeve into lower and upper positions, respectively. A reciprocable power operated apparatus connected to the upper end of the sleeve reciprocates the sleeve.

REFERENCES:
patent: 3362682 (1968-01-01), Meschonat et al.
patent: 3679173 (1972-07-01), Sherrick et al.
patent: 3722332 (1973-03-01), Jones
patent: 3844533 (1974-10-01), Markiewicz et al.

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