Machine element or mechanism – Control lever and linkage systems – Multiple controlling elements for single controlled element
Patent
1992-07-30
1994-05-17
Braun, Leslie A.
Machine element or mechanism
Control lever and linkage systems
Multiple controlling elements for single controlled element
74 8915, 74 8917, 74 8922, 108143, 248656, 248913, G05G 1100, F16H 2702
Patent
active
053117913
ABSTRACT:
An object of the present invention is to provide a two dimensional drive system having higher positioning accuracy. The drive system includes a pair of first linear guides provided in a first direction; a pair of second linear guides provided in a second direction; a pair of first travellers slidably engaged with the first linear guides; a pair of second travellers slidably engaged with the second linear guides; a first ball bearing screw rotatably spanned between the second travellers; a second ball bearing screw rotatably spanned between the first travellers; a slider screwed with the first and the second ball bearing screws, the slider being capable of moving on the ball bearing screws; a first and a second motors for driving each ball bearing screw; a first restrainer for restraining the inclination of the first ball bearing screw with respect to the first direction; and a second restrainer for restraining the inclination of the second ball bearing screw with respect to the second direction.
REFERENCES:
patent: 2941136 (1960-06-01), Marantette et al.
patent: 3495519 (1970-02-01), Alfsen et al.
patent: 4628756 (1986-12-01), Kimura et al.
patent: 4995277 (1991-02-01), Yanagisawa
Braun Leslie A.
Laub David W.
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