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Electromagnetically Controlled Hydraulic Valve

IP.com Disclosure Number: IPCOM000093486D
Original Publication Date: 1967-Oct-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

Raider, JW: AUTHOR [+2]

Abstract

Pilot valve 10 comprises spools 11 and 12 separated by eccentric cam 13 connected to shaft 14 rotatably mounted on a suitable bearing. Armature 15, connected to shaft 14, extends radially outward to become engaged with angularly spaced electromagnets 16 and 17. Valve 10 is shown held in its left position by magnet 16. In this position, actuator valve 18 is forced to the extreme right by hydraulic pressure. The latter is supplied through valve 18, from supply conduit 20 through connector conduit 21 and through spool 11 then through conduit 22 to the left end of valve 18.

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Electromagnetically Controlled Hydraulic Valve

Pilot valve 10 comprises spools 11 and 12 separated by eccentric cam 13 connected to shaft 14 rotatably mounted on a suitable bearing. Armature 15, connected to shaft 14, extends radially outward to become engaged with angularly spaced electromagnets 16 and 17. Valve 10 is shown held in its left position by magnet 16. In this position, actuator valve 18 is forced to the extreme right by hydraulic pressure. The latter is supplied through valve 18, from supply conduit 20 through connector conduit 21 and through spool 11 then through conduit 22 to the left end of valve 18.

Hydraulic pressure is also applied through conduit 23 to the left end of spool 11 forcing it against cam 13. De-energizing magnet 16 allows hydraulic pressure in conduit 23 to move spool 11 to the right causing cam 13 to rotate counterclockwise causing spool 12 to move to the extreme right position. Armature 15, rotated counterclockwise, is held by energized magnet 17. Moving valve 10 to the right position switches pressure from conduit 20 through spool 12 to conduit 24 to the right end of valve 18. The latter, moving left, closes conduit 25 to a sump and opens conduit 27 to supply conduit 20 providing a bias pressure to the right end spool 12.

Valve 18 also opens conduits 38 thus connecting conduits 22, 23, and 29 from spool 11 and left side of valve 18 through conduit 28 to the sump. The coupling of valve 10 through cam 13 and armature 15 to magnets...