Machine element or mechanism – Mechanical movements – Reciprocating or oscillating to or from alternating rotary
Patent
1978-04-12
1980-10-07
Staab, Lawrence J.
Machine element or mechanism
Mechanical movements
Reciprocating or oscillating to or from alternating rotary
744248R, F16H 2702, F16H 2920
Patent
active
042261295
ABSTRACT:
A drive mechanism including a nut rotatable within a sleeve and a worm that extends through the nut and is threadedly engaged by it. The nut is locked to the sleeve for joint rotation so that rotation of the sleeve produces longitudinal movement of the worm. Flexibility of the worm avoids alignment problems. The worm is formed by a helical member received by the thread grooves of the nut and an internal restrainer connected at a plurality of points to the helical member. A release mechanism can be actuated to permit free longitudinal movement of the nut with the worm, so that the worm and the structure to which it is connected can be moved without rotation of the nut, if necessary.
A plurality of telescopically internested members can be arranged to receive the worm as it is extended, thereby enabling it to withstand compressive forces. When withdrawn, the worm can be coiled and stored in a magazine.
REFERENCES:
patent: 1122649 (1914-12-01), Sears
patent: 2299785 (1942-10-01), Barrett
patent: 2634370 (1953-04-01), Carlson
patent: 2919911 (1960-01-01), Furtan
patent: 2953934 (1960-09-01), Sundt
patent: 3156132 (1964-11-01), Borie
patent: 3163054 (1964-12-01), Werner
patent: 3411373 (1968-11-01), Zieber et al.
patent: 3691858 (1972-09-01), Wilke
patent: 4074463 (1978-02-01), Colanzi
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