Cleanable actuator

Details Cleanable actuator Cleanable actuator

1997-10-28

1999-03-02

Footland, Lenard A.

Bearings

Linear bearing

Plain bearings

384 42, 384295, F16C 2902

Patent

active

058761233

ABSTRACT:
A guide bearing assembly is disclosed which is capable of being thoroughly cleaned. A linear actuating embodiment includes a reciprocating shaft with first and second spools axially spaced a predetermined distance. Each spool has an associated guide bearing surface taking the form of a cylindrical bore, with the bores axially spaced a distance greater than the axial distance between spools so that when one spool is in engagement with its guide bore, the opposite spool is out of engagement with its guide bore. A rotary bearing embodiment includes a rotatable shaft having first and second spools with each spool having a plurality of angularly spaced lobes. The lobes cooperate with complementing guide bearing surfaces on a guide sleeve. The lobes of one spool are angularly spaced relative to the lobes of a second spool, so that with the lobes of the first spool in engagement with their guide surfaces, the lobes of the second spool are disengaged, and vice versa.

REFERENCES:
patent: 4975054 (1990-12-01), Esrock
patent: 5006114 (1991-04-01), Rogers et al.
patent: 5197954 (1993-03-01), Cameron

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