US 3,945,302 AGranted

Diaphragm adjustment tool

AssigneeCummins Engine Company, Inc.

InventorRonald Downs

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Abstract

The disclosure illustrates a tool which permits the adjustment of a pressure responsive flow controlling diaphragm assembly while the diaphragm is pressurized. The tool is used to adjust the position of a central shaft threaded through the diaphragm and held in place by a locking jam nut. The central shaft and locking nut are received in a center bolt having a hexagonal head which holds the diaphragm assembly together. The tool comprises a base that is mounted over the pressurized face of the diaphragm in place of its normal cover. A series of concentric sockets extend through the base for engaging the center bolt and the lock nut. A center shaft extends through the sockets and has a section of an allen wrench received in a corresponding recess of the central shaft of the diaphragm assembly. Suitable passages in the base enable the diaphragm to be pressurized to a desired adjustment pressure. Manipulation of the various sockets and center shaft permits the central diaphragm shaft to be adjusted upon actual operating conditions.

Claims10

Dependent claims

Apparatus for adjusting the relative position of a central shaft of a pressure responsive diaphragm assembly positioned in a recess in a housing, said diaphragm assembly including locking means for selectively engaging and disengaging said central shaft with said diaphragm assembly, said apparatus comprising:

a base plate releasably and sealingly secured to said housing over said recess, said base plate having means defining an opening therethrough generally in line with said central shaft and locking means;
a first element telescoped through and sealingly engaging said opening, said first element being connectable with said locking means and displaceable relative to said base plate for selectively engaging and disengaging said locking means, said first element having an opening therethrough,
a second element telescoped through and sealingly engaging the opening through said first element, said second element including means for interconnecting said second element with said central shaft and displaceable relative to said base plate for varying the position of said central shaft relative to said diaphragm assembly when said locking means is disengaged;
said base plate including means for connecting a source of pressurized fluid to said recess whereby the position of said central shaft is adjustable under conditions in which said diaphragm is exposed to pressure.

1 more element

Dependencies are inferred from the claim text.