Diaphragm pump with support ring
AssigneeThomas Industries, Inc.
InventorsPaul J. Weiss, Jeffrey J. Weiss
Life of this patent
Estimating the term…
Abstract
Disclosed herein is a wobble diaphragm pump having a housing with an open neck. A wobble piston can be passed through the open neck and fit onto the pump motor shaft. A separate support ring is fastened to the housing to close the open neck and provide a circumferential support surface for the diaphragm. The support ring also includes locking projections that mate with recessed features in the housing and a valve head to properly align and unite these components during assembly.
Claims12
A diaphragm pump having a wobble piston eccentrically mounted to a rotatable shaft at one end and having a compliant sealing member attached at an opposite flange end of the piston, comprising:
- a housing defining a crankcase extending axially beyond the shaft to an open access end and a neck extending perpendicularly to the shaft and having an open throat extending through the neck to the access end of the crankcase to allow the piston to be moved axially with respect to the shaft through the throat and onto the shaft;
- and
- a support ring mounted to the housing over the throat so as to span the throat and provide a circumferential support surface to which is mounted the circumference of the sealing member.
A method of assembling a diaphragm pump having a housing with a neck and having an open throat in which is disposed a rotatable shaft eccentrically mounting a wobble piston with a compliant sealing member, the method comprising the steps of:
- supporting the shaft inside the crankcase;
- inserting the piston axially with respect to the shaft through the open throat onto the shaft so that the piston is substantially centered in the neck;
- securing the piston to the shaft;
- mounting a support ring onto the housing over the neck so as to span the throat;
- and
- fastening the sealing member to the support ring about its circumference.
Dependencies are inferred from the claim text.