Interlock valve and control

Details Interlock valve and control Interlock valve and control

1987-05-21

1988-12-27

Michalsky, Gerald A.

Fluid handling

Combined

74477, 74745, 13762525, 13762566, F15B 13042

Patent

active

047933780

ABSTRACT:
A four way two position interlock air valve adapted to selectively provide air pressure to a servomotor to shift the range section of a transmission. The valve spool is moved by applying pressure to one end thereof while exhausting pressure from the other. The upper side of the spool has a recessed portion within which a valve slide is positioned. The slide is operative to provide communication between a pressurized inlet port and the one of two outlet ports connected to the servomotor depending on the position of the valve spool. The slide is urged upwardly against the inner surface of the valve body by a wave spring. The area of the upper side of the slide is smaller than the area of the lower side thereof and an aperture connects the two sides such that air pressure controlled thereby also urges the slide upwardly against the valve body. The bottom side of the spool has four shoulders formed thereon to interlock with transmission shift rail actuated locking pins at such time as any of said rails is out of its neutral position. When so interlocked, the valve spool cannot be moved.

REFERENCES:
patent: 3215163 (1965-11-01), Henderson
patent: 3227180 (1966-01-01), Tissot-DuPont
patent: 3229551 (1966-01-01), Stuckey
patent: 3393586 (1968-07-01), Zundel
patent: 3556151 (1971-01-01), Masuda
patent: 3587647 (1971-06-01), Walters
patent: 4445393 (1984-05-01), Braun
patent: 4448094 (1984-05-01), Yarnell
patent: 4450869 (1984-05-01), Acker
patent: 4550627 (1985-11-01), Lauer et al.

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