Browse Prior Art Database

Floating Disk Element

IP.com Disclosure Number: IPCOM000094492D
Original Publication Date: 1965-Feb-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 31K

Publishing Venue

IBM

Related People

Bahr, J: AUTHOR

Abstract

The bistable fluid device consisting of a floating disk FD freely movable in a cylindrical flat chamber provides for high speed switching.

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Floating Disk Element

The bistable fluid device consisting of a floating disk FD freely movable in a cylindrical flat chamber provides for high speed switching.

The disk can assume two stable positions in each of which a pair of chamber openings, either control opening C1 and output opening O1 or C2 and O2, is sealed by the disk. Switching of the disk is accomplished by the application of pressure pulses to control line C1' or C2'. Switching can also be performed merely by closing that control line the chamber opening of which is sealed by the disk.

Owning to leakage losses, pressure builds up behind the disk causing the disk to be flipped to the other stable position. The build-up pressure nearly reaches the supply pressure and is higher than the pressure at the other side of the disk. This is due to considerable loss of pressure between the supply opening and the control opening owing to the small transverse dimensions of the chamber.

For fast disk operation, the stroke is made smaller than the supply channel diameter thus increasing the flow velocity at the chamber entrance causing a high disk driving force. In addition, small grooves G1 and G2 are provided from the supply channel to the control channel openings to establish an artificial leakage serving to speed up the pressure build-up behind the disk.

Floating disk elements 11 and 12 are used to close the control lines in order to initiate the switching operation.

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