Liquid applicator with one way drive

摘要

A liquid applicator structure which has an application tip fixed to front end of a cylindrical body and a liquid supply assembly built in its rear end. The liquid supply assembly includes a rotatable rod composed of a cylindrical shank-and-operating end and a solid rod having male threads thereon. The rotatable rod is held with an anti-rotation member having a cantilever-like extension. A split slide member having two split extensions is engaged with the rotatable rod at its rear end. One of these split extensions is inserted within the cantilever-like extension of the anti-rotation member and the rotatable rod, thereby preventing the split slide member from rotating. A piston member abuts on the split slide member. Rotation of the rotatable rod causes the split slide member and the piston to advance and drive liquid toward the application tip.