Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1993-05-21
1995-08-15
DePumpo, Daniel G.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277 59, 277188A, 13762569, 417393, B65D 5306
Patent
active
054412811
ABSTRACT:
An air driven diaphragm pump having two diaphragms joined by a common control shaft to reciprocate in opposed chambers for pumping material through check valve ported cavities. An actuator valve is associated with the central housing of the pump and includes a valve cylinder within which a valve piston reciprocates. The valve piston is caused to reciprocate by alternate venting of the ends of the cylinder. Enlarged air chamber passages are controlled by the control shaft to vent the ends of the valve cylinder. A cylindrical portion of the control shaft includes axial slots for venting alternate ends of the valve piston. Annular channels manifold air to and from the axial slots. The actuator housing is molded about the center bushing for the control shaft and includes inwardly extending portions. Annular passages are then machined in the bushing for sealing channels to receive O-rings. The O-rings extend to seal against the housing directly at the floor of the sealing channels.
REFERENCES:
patent: D275858 (1984-10-01), Wilden
patent: D294946 (1988-03-01), Wilden
patent: D294947 (1988-03-01), Wilden
patent: 2747611 (1956-05-01), Hewitt
patent: 3071118 (1963-01-01), Wilden
patent: 3354911 (1967-11-01), Fall
patent: 3487435 (1969-12-01), Sheardown
patent: 3557257 (1970-09-01), Kling
patent: 4238992 (1980-12-01), Tuck, Jr.
patent: 4247264 (1981-01-01), Wilden
patent: 4325402 (1982-04-01), Akkerman et al.
patent: 5169296 (1992-12-01), Wilden
DePumpo Daniel G.
Wilden Pump & Engineering Co.
LandOfFree
Shaft seal does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Shaft seal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Shaft seal will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2176628