Linear actuator with positive stop

Details Linear actuator with positive stop Linear actuator with positive stop

1990-09-06

1992-08-11

Herrmann, Allan D.

Machine element or mechanism

Mechanical movements

Reciprocating or oscillating to or from alternating rotary

744248R, 297330, F16H 2920, F16H 120, B06N 202

Patent

active

051368897

ABSTRACT:
An improvement to a linear actuator (9) having a lead screw (15) received in a drive tube assembly (17) is provided in the form of a bushing (41) mounted on the end of the screw. The outer dimension of the bushing generally corresponds to the inner dimension of the tube. The bushing has a recess (53) formed in one face to accommodate a washer (55). A retaining ring (59) holds the bushing in place. The bushing serves both to prevent contact between the lead screw and tube to reduce noise during actuator operation, and as a positive stop to prevent disengagement of the lead screw from the drive tube assembly.

REFERENCES:
patent: 2966070 (1960-12-01), Wise
patent: 3178957 (1965-04-01), Martens
patent: 3200664 (1965-08-01), Mauric
patent: 3277736 (1966-10-01), Goodman
patent: 4000664 (1977-01-01), Christensen
patent: 4614128 (1986-10-01), Fickler
patent: 4679451 (1987-07-01), Nakamura
patent: 4909569 (1990-03-01), Gaffney

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