Fire apparatus valve

In a flow-control valve assembly comprising a valve body, an axially slidable tubular valve member disposed axially within said valve body, a valve seat restrained against axial movement disposed in said valve body in axial alignment with said tubular valve member, and means for effecting reciprocable movement of said tubular valve member into a position of sealing enagagement with said valve seat and movement away from said sealing engagement to permit flow of fluid past said valve seat, the improvement comprising:

• valve operating means for effecting reciprocable movement of said tubular valve member having a circumferential groove formed in the outer surface of said tubular valve member, a circular disc mounted in a bore in a lateral surface of said valve body adapted for limited reciprocable rotatable moveable about an axial pivot member on said valve body, a lug extending from the inner surface of said disc through said valve body into operative engagement in said groove of said tubular valve member, reciprocable means for moving said disc in limited reciprocable rotatable motion for effecting reciprocable movement of said tubular valve member into and out of seating engagement with said valve seat, said disc comprised of an outer resilient deformable abrasion resistant disc member having a frustroconical recess formed centrally therein, a rigid insert member having a frustroconical cross sectional configuration along a diameter thereof seated in said recess, and means for exerting axial pressure on said insert member sufficient to effect expansion of circumferential portions of said disc member;
• whereby movement of said reciprocable moving means is restricted and a braking action exerted on the movement of said tubular valve member when said insert member is pressed into frictional engagement with said disc member.

A flow control valve assembly comprising a valve body, flow control means in said valve body comprising a valve member and a valve seat axially aligned in said valve body with only one of said valve member and valve seat being reciprocably movable axially relative to the other into and out of sealing engagement to control the flow of fluid through said valve body, operating means for effecting relative axial movement between said valve member and valve seat into and out of sealing engagement, said operating means comprising a cylindrical disc mounted in a bore in a lateral surface of said valve body adapted for reciprocable rotary movement about an axial pivot member on said valve body, means for moving said disc in limited recriprocable rotary motion, said disc having a disc member formed of a resilient deformable abrasion-resistant material with a frustroconical recess formed centrally therein, a rigid insert member having a frustroconical cross section configuration along a diameter thereof seated in said recess, and adjusting means for exerting axial pressure on said insert member sufficient to effect expansion of outer cylindrical portions of said disc member;

• whereby movement of said operating means is restricted when said disc member is pressed into frictional engagement in said bore to exert a braking action on the relative axial movement of said valve member and valve seat.