US PATENT SUBCLASS 401 / 172
.~.~ Movable by screw means

Current as of: June, 1999
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401 /   HD   COATING IMPLEMENTS WITH MATERIAL SUPPLY

143  DF  INCLUDING MEANS TO APPLY MATERIAL-MOVING FORCE {10}
171  DF  .~ Piston-provided reservoir {2}
172.~.~ Movable by screw means {2}
173  DF  .~.~.~> On piston and reservoir wall
174  DF  .~.~.~> On piston and manual actuator {1}

DEFINITION

Classification: 401/172

(under subclass 171) Implement including a helical camming element (e.g., slot, thread, or groove) and another element rotatable relative thereto and having a cooperating cam follower (e.g., a cooperating thread), relative rotational motion between the two elements causing the force-applying movement of the piston.