Machine element or mechanism – Gearing – Directly cooperating gears
Patent
1987-07-27
1989-06-06
Herrmann, Allan D.
Machine element or mechanism
Gearing
Directly cooperating gears
74459, 74468, 384123, F16H 2524
Patent
active
048360422
ABSTRACT:
In a system that includes a linearly movable carriage or the like, a mechanism to convert rotary motion of a leadscrew to linear motion of a nut and, hence, linear movement of the carriage to which the nut is mechanically secured. The leadscrew has a special threadform and the nut has a special threadform that matches the threadform of the leadscrew with a pressurized fluid interface therebetween, there being both axial clearance and radial clearance sufficient to accommodate angular and lateral misalignment between the leadscrew and the carriage. Shallow independent grooves or passages are distributed along the length nut's helical threadform to equalize air pressure therealong and orifices are provided to the grooves or passages to permit introduction of high pressure air or other fluid thereto. Exhausts are provided from the region of clearance between the leadscrew threadform and the nut threadform. Both threadforms are ideally in the form of square threads.
REFERENCES:
patent: 2320353 (1943-06-01), Ernst et al.
patent: 3171295 (1965-03-01), Benckert
patent: 3183732 (1965-05-01), Porath
patent: 3448632 (1969-06-01), Rumbarger
patent: 3670583 (1972-06-01), Leming
patent: 4566345 (1986-01-01), Erikson
Advanced Engineering Systems, Operations & Products Inc.
Herrmann Allan D.
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