Machine element or mechanism – Mechanical movements – Reciprocating or oscillating to or from alternating rotary
Patent
1997-06-30
2000-07-04
Hannon, Thomas R.
Machine element or mechanism
Mechanical movements
Reciprocating or oscillating to or from alternating rotary
211 151, 211 157, 3122492, 254103, F16H 2520
Patent
active
060822074
ABSTRACT:
A loaded vertically operating ball screw and nut actuator system, including methods of constructing it, for synchronously moving load systems connected to it in opposite vertical directions has a vertically disposed rotatably driven ball screw device with screw sections of opposite hand. A complemental recirculating ball nut discretely connected to each of the load systems is threaded on each screw section to form ball receiving raceways for trains of load bearing balls which cause the ball nuts to move in opposing directions upon rotation of the screw in either direction. The load systems move in counterbalanced relation under the influence of gravity. A mount system for the upper and lower ends of the screw permits an off-axis adjustment in axial orientation of the screw to compensate for load misalignment problems.
REFERENCES:
patent: 1024582 (1912-04-01), Jones
patent: 3629744 (1971-12-01), Maier et al.
patent: 4318304 (1982-03-01), Lang
patent: 4548298 (1985-10-01), Born
patent: 5311788 (1994-05-01), Kasuga
patent: 5493929 (1996-02-01), Namimatsu et al.
Hannon Thomas R.
Joyce William C
Thomson Saginaw Ball Screw Company, L.L.C.
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