Patent ID: 7048155
Filing Date: 2006-05-23
Classification: B05B

Abstract:
1. A depression head for attachment on a pump having a depressible and upwardly urged stem, said depression head comprising; a mounting cylinder assembly having a top plate, a mounting cylinder depending from an underside of the top plate for fitting on an upper end of the stem, and a sliding cylinder extending upwardly from the top plate and communicating with the stem, a body capable of depressing with respect to the mounting cylinder assembly, said body including an attachment cylinder for slidable and depressible fitting on an outside of the sliding cylinder, a valve chamber disposed above the attachment cylinder and having a discharge port defined at its leading end, said valve chamber communicating with the attachment cylinder through a communication port, a valve member for insertion into the valve chamber and being forwardly urged to close the discharge port and having a sealing portion making a liquid tight contact with a rear portion of the valve chamber, such that a liquid passage from the communication port to the discharge port is defined between the valve member and the valve chamber forwardly of the sealing portion, a lever member having an upper portion coupled to a rear end portion of the valve member, and a lower end portion contacting to an upper side of the top plate for coacting therewith, said lever member being pivoted swayably capable of pulling the valve member rearward, upon depression of the body with respect to the mounting cylinder assembly, characterized in that a resistive force against the depression of the body with respect to the stem is smaller than a resistive force against the depression of the stem itself.