Jack and components therefor

Details Jack and components therefor Jack and components therefor

1990-08-16

1991-03-26

Watson, Robert C.

Implements or apparatus for applying pushing or pulling force

Single throw lever

Mechanically actuated

B66F 308

Patent

active

050022580

ABSTRACT:
An improved jack with overload prevention including a lead screw having a driven end and an upstanding integral boss proximate the driven end, the driven end comprising a body abutting the upstanding boss and including an opening therethrough for receiving the end of the lead screw, the body carrying slots, grooves or recesses radiating from the opening and being in communication with the opening and carrying material from the lead screw displaced into the grooves thereby securing the body to the lead screw.

REFERENCES:
patent: Re30640 (1981-06-01), Keilholz
patent: 3317187 (1967-05-01), Steppor
patent: 3989225 (1976-11-01), Keilholz
patent: 4055329 (1977-10-01), Hammond
patent: 4093182 (1978-06-01), Rutenbeck
patent: 4448392 (1984-05-01), Ladewski
patent: 4653727 (1987-03-01), Chang et al.
patent: 4802653 (1989-02-01), Engel

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