Patent ID: 11879564
Assignee: nan
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 1:
2. An apparatus for locking the position of a rotary valve having a valve shaft adapted to have first and second opposed, flatted formations, comprising:
a plate stack, said plate stack comprising:
first and second fixed plates having first and second registering openings, respectively;
a first movable plate having first and second spaced apertures, said first aperture being partially defined by a first wall section;
a second movable plate having third and fourth spaced apertures, said first and second apertures being in at least partial register with said third and fourth apertures, respectively, said third aperture being at least partially defined by a second wall section, said first aperture and said third aperture having portions which are in register to form a passage for said shaft;
a cam assembly mounted in said plate stack, said cam assembly comprising:
a stem extending through said first and second movable plates and said first fixed plate;
first and second cams mounted in axially spaced relationship on said stem, said first cam being drivingly engageable with said first movable plate, said second cam being drivingly engageable with said second movable plate;

whereby rotation of said stem causes said first and second cams to engage said first and second movable plates, respectively, and said first and second wall sections into operative engagement with said first and second flatted formations, respectively.