Apparatus for automatically inserting and removing screw-threade

Details Apparatus for automatically inserting and removing screw-threade Apparatus for automatically inserting and removing screw-threade

1993-01-19

1994-07-19

Watson, Robert C.

Implements or apparatus for applying pushing or pulling force

Pipe or rod jack

Tie rod tensioner

B25B 2900

Patent

active

053301595

ABSTRACT:
Apparatus for automatically inserting and removing screw-threaded elements into and from threaded bores of a pressure vessel to fit or detach a cover employs a screw-clamping device with a carrier ring supporting individual mechanisms for each screw-threaded element. Each mechanism employs a pair of parallel hydraulic piston and cylinder units with their cylinders supported for sliding on a flat surface of the carrier ring and their piston rods linked to a pressure bridge which brace on a shoulder of a screw-threaded sleeve fitted onto the associated screw-threaded element. The entire mechanisms is displaceably adjustable relative to the carrier ring predominantly in a radial direction relative to a common pitch circle for all the screw-threaded elements.

REFERENCES:
patent: 3287999 (1966-11-01), Kreck et al.
patent: 4216876 (1980-08-01), Warnke
patent: 5101694 (1992-04-01), Sevelinge et al.

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