Irreversible screw and nut driving device

Details Irreversible screw and nut driving device Irreversible screw and nut driving device

1989-02-27

1991-10-22

Braun, Leslie A.

Machine element or mechanism

Mechanical movements

Reciprocating or oscillating to or from alternating rotary

744115, 744248R, 192 8C, F16H 5706

Patent

active

050584456

ABSTRACT:
In a screw and nut driving device with low internal friction, e.g. a ball nut mechanism, irreversibility is effected in a simple and efficient manner when the nut is rotatably driven and enclosed by an annular space in which a helical spring is arranged in such a manner that its ends are acted upon by the driving force from the external driving source, thus that the spring can rotate freely in the space. When the external driving source is disconnected and the nut, due to axial load is subjected to a torque, the ends of the spring are acted upon thus that the spring is deformed to friction locking against a non-rotating surface, whereby the nut is prevented from rotation.

REFERENCES:
patent: 2953934 (1960-09-01), Sundt
patent: 3110380 (1963-11-01), Meyer et al.
patent: 3269199 (1966-08-01), Deehan et al.
patent: 3304796 (1967-02-01), Bird
patent: 3449978 (1969-06-01), Stimpson
patent: 3722641 (1973-03-01), Kusiak
patent: 3802281 (1974-04-01), Clarke
patent: 4246991 (1981-01-01), Oldakowski
patent: 4557156 (1985-12-01), Teramachi
patent: 4623051 (1986-11-01), Lochmoeller
patent: 4644811 (1987-02-01), Tervo

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