|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||417/505 ; 417/901|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 18 인용 특허 : 0|
A piston pump having an intake valve whose valve member is approached by the pump piston. The piston magnetically attracts the valve member during the intake stroke to overcome the force of the spring biasing the valve member into its closed position.
A piston pump comprising: a cylinder; a pumping piston member reciprocatable in said cylinder and having an intake stroke upon movement in one direction and a discharge stroke upon movement in the opposite direction; an intake port formed in said cylinder and provided with an intake valve having an intake valve member approached by said piston at the end of a discharge stroke, and a spring biasing said valve member into a closed position, a discharge port provided with a discharge valve whereby fluid is displaced from said cylinder through said discharge...