Screw and nut device for taking up clearance

Details Screw and nut device for taking up clearance Screw and nut device for taking up clearance

1987-04-27

1988-06-28

Herrmann, Allan D.

Machine element or mechanism

Control lever and linkage systems

Hand operated

744248R, 74127, 74409, 74458, 74459, 49352, 188196V, 192111A, F16D 6556, E05F 1148, F16C 122

Patent

active

047531240

ABSTRACT:
Device comprising a screw (6) and a nut (8) subjected to an axial force which alternates in opposite directions, the thread (7) of the screw having a given helix angle and a given pressure angle which are so chosen that, in a first direction, termed reversible direction, the screw (6) is capable, under the axial thrust exerted in this direction by a spring (20), of effecting a translation and a rotation in the nut (8), and that, in a second direction, termed irreversible direction, opposed to the first direction, the screw undergoing an axial thrust in this second direction by a push-member (9), can effect neither a translation nor a rotation in the nut. This assembly may be applied to the automatic taking up of play of systems subjected to alternating longitudinal forces, such as shafts of electric motors or cable controls.

REFERENCES:
patent: 4235046 (1980-11-01), Hess et al.
patent: 4378713 (1983-04-01), Haskell et al.
patent: 4386685 (1983-06-01), Cole et al.
patent: 4420988 (1983-12-01), Deligny
patent: 4621933 (1986-11-01), Musso

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