Machine element or mechanism – Elements – Pitmans and connecting rods
Patent
1983-04-27
1986-05-20
Staab, Lawrence J.
Machine element or mechanism
Elements
Pitmans and connecting rods
744248R, 188 67, 188196D, 188202, F16H 2520
Patent
active
045893012
ABSTRACT:
A linearly infinitely variable mechanism comprises first and second portions which are relatively axially positionable to establish the effective length of the mechanism. A rotary element is axially captured on the second portion. The operative connection between the first portion and the second portion is via a threaded connection of the first portion with the rotary element. The axial capture of the rotary element comprises a twist lock which, when locked, forcefully abuts the ends of the rotary element to preclude its rotation and prevent a change in the effective length of the mechanism provided that the first and second portions are constrained against relative rotation. When unlocked, the rotary element can rotate within its axial capture so that axial forces applied to the mechanism are effective to change its length. Recesses are provided between the element and the twist lock and contain yieldably resiliently mounted bearings which promote free rotation of the element when unlocked but which retract into the recesses when locked.
REFERENCES:
patent: 2501976 (1950-03-01), Vitek
patent: 2579305 (1951-12-01), Cushman
patent: 3046055 (1962-07-01), Martens
patent: 3127788 (1964-04-01), Martens
patent: 3249183 (1966-05-01), Billeter
patent: 3283861 (1966-11-01), Mersereau
patent: 3350135 (1967-10-01), Martens
patent: 3356411 (1967-12-01), Homier et al.
patent: 3398986 (1968-08-01), Homier
patent: 3454140 (1969-07-01), Billeter
patent: 3850269 (1974-11-01), Beacon
patent: 4022304 (1977-05-01), Spalding
Hoover Universal Inc.
Staab Lawrence J.
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