Impact micro-positioning actuator

Details Impact micro-positioning actuator Impact micro-positioning actuator

2006-01-10

2006-01-10

Joyce, William C (Department: 3682)

Machine element or mechanism

Mechanical movements

Reciprocating or oscillating to or from alternating rotary

C074S089100

Reexamination Certificate

active

06983667

ABSTRACT:
An impact micro-positioning actuator. In one aspect of the invention, a threaded shaft is threadably received in a nut and the nut is impacted by an impacting device, causing the nut first to rotate relative to the shaft by slipping as a result of shaft inertia and subsequently to stick to the shaft as a result of the frictional force therebetween. The nut is returned to its initial position by a return force provided by a return mechanism after impact. The micro-positioning actuator is further improved by controlling at least one and preferably all of the following: the friction, the impact provided by the impacting device, the return force provided by the return mechanism, and the inertia of the shaft. In another aspect of the invention, a threaded shaft is threadably received in a nut and the shaft is impacted by an impacting device, causing the shaft to rotate relative to the nut.

REFERENCES:
patent: 1459402 (1923-06-01), Johnson
patent: 2882772 (1959-04-01), Potter
patent: 3207961 (1965-09-01), Lohr
patent: 3211028 (1965-10-01), Christensson
patent: 5410206 (1995-04-01), Luecke et al.
patent: 5511438 (1996-04-01), Aki
patent: 5522579 (1996-06-01), Rock
patent: 25 54 315 (1976-06-01), None
patent: 0 478 928 (1992-04-01), None
Cuerden, Brian et al., “A Linear Micro-Positioning Actuator for Ambient and Cryogenic Operation,” Steward Observatory, The University of Arizona.

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