Joint between the lower portion and the main portion of a loadin

Details Joint between the lower portion and the main portion of a loadin Joint between the lower portion and the main portion of a loadin

1977-12-15

1979-10-16

Ridgill, Jr., James L.

Static structures (e.g., buildings)

Mechanism operated relatively movable shaft assembly

Fluid pressure actuated

182 2, 403361, 212 58R, E04H 1234

Patent

active

041708547

ABSTRACT:
An improved joint and method of providing such a joint between the upper and lower portions of a rotatably driven crane post, comprising a sleeve-shaped member formed internally with screw threads and provided at the lower end of the upper position, a pin provided at the upper part of the lower post portion and formed externally with screw threads matching the sleeve member threads, and a collar on the lower post portion below the pin against which collar the sleeve-shaped member is pressed upon screwing together of the lower and upper post portions to form said joint.

REFERENCES:
patent: 2796998 (1957-06-01), Sundin
patent: 3279835 (1966-10-01), Krohm et al.
patent: 3477595 (1969-11-01), Whitfield

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