Machine element or mechanism – Mechanical movements – Reciprocating or oscillating to or from alternating rotary
Patent
1980-08-21
1982-10-05
Staab, Lawrence J.
Machine element or mechanism
Mechanical movements
Reciprocating or oscillating to or from alternating rotary
744248R, F16H 2702, F16H 2902
Patent
active
043523005
ABSTRACT:
A combined linear and circular drive mechanism for driving a spindle in an up or down direction and also in a circular path about an axis parallel to the spindle. The mechanism has a dual or compound nut which is driven to rotate in a fixed plane so as to drive a spindle threaded therethrough in an up or down direction. The dual nut mechanism has a pair of nut components having respective eccentrically positioned threaded openings, the openings being displaced from each other such that one of the nut components engages the threaded spindle to drive it in a first direction while it is being carried in a circle, and a second nut component engages the spindle to drive it in the reverse direction, also while the shaft is being rotated in a circle. The threaded portion of the spindle is bounded by unthreaded portions, such that when it is driven to an upper or lower limit by one of the nut components such nut component ceases to engage the spindle threading, whereupon when the nut drive is reversed the other nut component engages the threaded portion and drives the spindle in the other direction.
REFERENCES:
patent: 2556572 (1951-06-01), Brinkhurst
patent: 3077792 (1963-02-01), Kinderman
patent: 3698258 (1972-10-01), Gartner
patent: 3710632 (1973-01-01), Tucker
patent: 3733914 (1973-05-01), Sheesley
patent: 3756092 (1973-09-01), Gartner
patent: 3982718 (1976-09-01), Folkenroth et al.
Staab Lawrence J.
Vitafin N.V.
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