Screw jack

Details Screw jack Screw jack

1987-05-18

1989-08-15

Braun, Leslie A.

Machine element or mechanism

Mechanical movements

Rotary to or from reciprocating or oscillating

744248R, F16H 2522

Patent

active

048563560

ABSTRACT:
The nut structure (3) of a screw jack has ball bearing units (4, 5, 6) the middle one (5) of which engages from one side and the two outer ball bearing units (4, 6) engage from the opposite side on the same plane of action into the thread (2). Thus the nut structure (3) is supported against the screw shaft (1) without tilting moments so that no neck bearing is needed. As a result the screw jack works with extremely little friction and with extremely little tendency to vibrate.

REFERENCES:
patent: 2482082 (1949-09-01), Wahlberg
patent: 2940322 (1960-06-01), Uhing
patent: 3698258 (1972-10-01), Gartner
patent: 3937089 (1976-02-01), Gartner
patent: 3977258 (1976-08-01), Bauer
patent: 4222619 (1980-09-01), Nilsson
patent: 4253342 (1981-03-01), Uhing
patent: 4322987 (1982-04-01), Gartner
patent: 4450731 (1984-05-01), Wardley
patent: 4557432 (1985-12-01), Ito
patent: 4573367 (1986-03-01), Uhing

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