Chattering valve for de-icer

Details Chattering valve for de-icer Chattering valve for de-icer

B - Operations, Transporting

64

D

244/108, 137/141

B64D 15/16 (2006.01)

Patent

CA 1334293

A chattering valve having particular application in a pulse pneumatic de-icer comprises accumulator, solenoid, and poppet sections; the accumulator section including an adjustable volume accumulation chamber operably connected to an outlet and an inlet for a fluid under pressure; the solenoid section including a fluted pilot pin operably connected to a solenoid and further including a caged ball and spring, the ball and spring being configured to forestall movement of the fluid under pressure to the outlet with the solenoid in a particular position and the flutes being configured to provide a passage for fluid under pressure from the inlet to the caged ball and spring while the solenoid is in the particular position, the solenoid section further including a primary seal operably connected to a chamber associated with the poppet section, the chamber being connected in pressurized fluid communication via the flutes whereby fluid under pressure may traverse from the inlet to the chamber, and the chamber being further operably connected whereby fluid under pressure in the chamber acts upon the primary seal and passes thereby to the outlet; and the poppet section including a shuttle configured for movement from a shut-off position whereby movement of fluid under pressure from the accumulator chamber to the outlet is substantially precluded to a release position whereby movement of fluid under pressure from the accumulator chamber is enabled, the shuttle being configured to, while in the release position, entrap a quantity of fluid under pressure in the chamber thereby substantially precluding movement of the entrapped quantity to the outlet and whereby the entrapped quantity assists in returning the shuttle to the shut-off position, the shuttle functioning thereby to oscillate rapidly between the release and shut-off positions producing thereby a chattering discharge of fluid under pressure from the accumulator chamber.

616638

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