Motors: expansible chamber type – Independently operated timer – delay – pattern or cyclic control – Of independently movable working members
Patent
1984-06-11
1985-03-12
Freeh, William L.
Motors: expansible chamber type
Independently operated timer, delay, pattern or cyclic control
Of independently movable working members
91 40, 91491, F15B 2102, F01B 106
Patent
active
045037515
ABSTRACT:
Three radially extending push rods (26, 28, 30) make contact with an undulating cam surface on the periphery of a cam (10). The push rods (26, 28, 30) are driven inwardly by electrical solenoids (94, 96, 98) or fluid motors (106, 108, 110). At the end of each step, one of the push rods (26, 28, 30) is fully extended and in contact with the bottom of a valley region of the cam surface. The second push rod is in a partially extended position against a sloping surface between a peak and a valley. The third push rod is in a partially extended position against an oppositely sloping surface between a peak and a valley. The push rods (26, 28, 30) are located within the center plane of a relatively thin cam. In other installations, they are spaced axially apart or both circumferentially and axially apart. A cam surface twists (FIG. 7) as it extends axially to, in that manner, provide different cam positions under each of three axially spaced apart push rods. A plurality of cams are connected together. Plural cams ( 172, 174, 176) with the same number of lobes are staggered in position. Or, the number of lobes can differ from cam to cam (FIGS. 10-14), to provide a variety of step size possibilities.
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Barnard Delbert J.
Freeh William L.
The Boeing Company
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