Machine element or mechanism – Gearing – Directly cooperating gears
Patent
1984-07-11
1987-04-28
Bonck, Rodney H.
Machine element or mechanism
Gearing
Directly cooperating gears
74 8915, F16H 118, F16H 120
Patent
active
046604316
ABSTRACT:
A rotary motion linear actuator is disclosed which is capable of substantial backlash or lost motion free operation. The rotary motion linear actuator includes a ball nut body having interior helical (Archimedes type) spiral grooves to contain a plurality of balls between the ball nut body and a rotatable shaft upon which the ball nut body is mounted in a substantially concentric relationship. A spiral slot is disposed in the ball nut body substantially parallel with the spiral grooves so as to effectively render the ball nut body capable of torsional deformation about its longitudinal axis, in analogy to a coil spring. The ball nut body carries an exterior torque tube or like mounting body, which holds the ball nut body in a predetermined torsionally deformed state. The balls disposed between the shaft and the ball nut body are therefore biased with a predetermined pre-load against the shaft, and the rotational axes of the balls are inclined relative to the longitudinal axis of the shaft. The shaft may have a substantially smooth exterior surface, or may incorporate helical spiral grooves to receive the balls.
REFERENCES:
patent: 2230049 (1941-01-01), Klamp
patent: 2642756 (1953-06-01), Cummings
patent: 2722845 (1955-11-01), Cummings
patent: 2733615 (1956-02-01), Cummings
patent: 3186250 (1965-06-01), Boutwell
patent: 3206991 (1965-09-01), Lines et al.
patent: 3272021 (1966-09-01), Weber
patent: 3302477 (1967-02-01), Grabowski
patent: 3425284 (1969-02-01), Shelton
patent: 3443443 (1969-05-01), Spence
patent: 3589202 (1971-06-01), Stanley
patent: 3990317 (1976-11-01), Gilman et al.
patent: 4074587 (1978-02-01), Brusasco
patent: 4141255 (1979-02-01), Nilsson
patent: 4186620 (1980-02-01), Brusasco
patent: 4224831 (1980-09-01), Nilsson
patent: 4246802 (1981-01-01), Rasmussen et al.
patent: 4253342 (1981-03-01), Uhing
patent: 4411166 (1983-10-01), Marcovici
Brochure entitled "ROH'LIX Linear Actuator", by Zero-Max Industries, Inc. of Minneapolis, Minn.
Brochure entitled "Thomson Star Ball Screw Assemblies", pp. 2 and 3, from Thomson Technical Bulletin, No. 25, of Thomson Industries, Inc., Port Washington, N.Y. 11050.
Brochure entitled "Thomson Ball Nut Linear Drive", 2 pages, from Thomson Technical Bulletin, No. 25, of Thomson Industries, Inc., Port Washington, N.Y. 11050.
Bonck Rodney H.
R&H Technology, Inc.
Wright Dirk
LandOfFree
Rotary motion linear actuator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Rotary motion linear actuator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rotary motion linear actuator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-469991