IP Library › Patent Application 11677305
Patent Application
App. No. 11/677,305

Diaphragm Assembly

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Quick Facts
Patent No.
US None
App. No.
11/677,305
Abstract

A diaphragm assembly for use with a hydraulic apparatus. The diaphragm assembly includes a cap formed of a rigid material and a diaphragm formed of an elastomeric material. The diaphragm is generally tubular and includes an upper annular collar portion defining an open upper end of the diaphragm and a main body portion extending downwardly from the collar portion, defining a closed lower end of the diaphragm, and including, in cross-section, a plurality of hollow radially extending circumferentially spaced arms. The cap includes an upper disc portion sized to receive the collar portion of the diaphragm and a rib portion extending downwardly from the disc portion and including, in cross-section, a plurality of radially extending circumferentially spaced arms positioned respectively within the arms of the main body portion of the diaphragm whereby the elastomeric arms of the diaphragm provide large expansion and contraction capacity and the rigid arms of the cap preclude undesired distortion or wrinkling of the flexible arms of the diaphragm.

Claims (8)

1 . A diaphragm assembly including a cap formed of a rigid material and a diaphragm formed of an elastomeric material, characterized in that:

the diaphragm is generally tubular and includes an upper annular collar portion defining an open upper end of the diaphragm and a main body portion extending downwardly from the collar portion, defining a closed lower end of the diaphragm, and including, in cross section, a plurality of hollow radially extending circumferentially spaced arms; and

the cap includes an upper disc portion sized to receive the collar portion of the diaphragm and a rib portion extending downwardly from the disc portion and including, in cross-section, a plurality of radially extending circumferentially spaced arms positioned respectively within the arms of the main body portion of the diaphragm.

2 . A diaphragm assembly according to claim 1 wherein the disc portion includes a central opening providing communication between an area above the disc portion and an area below the disc portion and between the disc portion arms.

3 . A diaphragm assembly according to claim 1 wherein:

the diaphragm assembly is intended for use with a housing having an upper annular rim; and

the disc portion of the cap includes means to facilitate securement to the upper annular rim of the housing with the main body portion of the diaphragm and the rib portion of the cap extending downwardly into the housing.

4 . A diaphragm assembly according to claim 1 wherein the diaphragm main body portion arms and the rib portion arms have a cross configuration in cross-section.