US 4,544,130 AGranted

Choke unit

OwnerKurt Stoll, Hans-Heinrich Glattliinventors

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Abstract

The essential part of an adjustable choke for compressed air and other fluids is made up of two relatively turning disks of which one has a calibrated channel in it running round the axis of the disks. By relative turning of the disks the fluid is caused to flow along different lengths of the channel in keeping with the desired choking action. The two disks are mounted within a housing, with a spring keeping them pressed together. The housing has a bell-like cover in which one of the disks is keyed and sealed at the disk's outer edge with the spring between it and the top of the cover in a chamber. The other disk is mounted on a base of the housing. There is a central pillar in the housing that joins the cover to the base and contains a duct by which is supplied into the chamber through a hole in the one disk, into the channel, through the other disk and then out through the base of the housing. The cover may be turned for turning the one disk in relation to the other.

Claims23

Dependent claims

A choke unit comprising a base and a cover, together forming a housing with a space therein and with an inlet duct and an outlet port, said duct and said port communicating with said housing space, flow rate controlling means joined fluidwise between said duct and said port, said controlling means being made up of a setting disk and of a contact disk, said disks making sealing contact with each over a contact interface, said disks being able to be turned in relation to each other about an axis while maintaining said contact interface, one of said disks having a groove therein within the area of said contact interface, said groove running circumferentially around said axis for less than 360.degree. and increasing in cross section circumferentially, holes in at least one of said disks communicating with said groove for conducting fluid into and out of a given length of said groove which may be changed by relative rotation of said disks, said holes being joined with said inlet duct and with said outlet port, a pillar for sealingly supporting one of said disks, said inlet duct being within said pillar, said setting disk being joined with said cover so as to be turned thereby, and radially fitting against said cover and said pillar so as to make sealing contact with both of them.

Dependencies are inferred from the claim text.