Patent ID: 6257845
Filing Date: 2001-07-10
Classification: F04B

Abstract:
An air driven diaphragm pump comprisinga first pump chamber;a second pump chamber;an air motor including a first air chamber, a second air chamber and an air valve, the first air chamber and the second air chamber facing in opposite directions with the air valve therebetween, the first pump chamber facing the first air chamber and the second pump chamber facing the second air chamber;an inlet manifold to a first side of the first and second pump chambers;an outlet manifold to a second side of the first and second pump chambers opposite the first side;a first diaphragm between the first pump chamber and the first air chamber;a second diaphragm between the second pump chamber and the second air chamber, each diaphragm including an integrally molded PTFE annular sheet and hub and a threaded stud having a head and a threaded shank, the head including circumferential ridges, the hub being molded about the head.