Flow rate controller for a closed fluid circulating system

F - Mech Eng,Light,Heat,Weapons – 16 – K

Patent

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Details

F16K 17/24 (2006.01) A62B 1/12 (2006.01) B66D 1/48 (2006.01) B66D 5/02 (2006.01) F16D 57/06 (2006.01)

Patent

CA 2583587

A flow rate controller (40) for a closed fluid circulating system, the controller including an orifice (41) between the upstream high pressure fluid (42) and the downstream low pressure fluid in the system, a valve member (44) biased to partially close the orifice (41) and cooperating with a piston member (47) having one end exposed to low pressure fluid (51)downstream of the orifice (41) and an opposed end (52) exposed to upstream high pressure fluid via a bypass passage (53), whereby as upstream high fluid pressure (42) increases, the piston member (47) acts to move the .valve member (44) further into the orifice (41) to reduce the fluid flow through the system. The flow rate controller (40) is used to control a descent device to enable people or loads to descend from elevated locations in emergency situations.

Contrôleur de débit (40) pour système fermé de circulation de fluide. Le contrôleur ci-décrit comporte un orifice (41) entre le fluide haute pression en amont (42) et le fluide basse pression en aval dans le système, un organe de valve (44) contraint pour fermer partiellement l~orifice (41) et coopérant avec un organe de piston (47) dont une extrémité est exposée au fluide basse pression (51) en aval de l~orifice (41) et dont une extrémité opposée (52) est exposée au fluide haute pression en amont via un passage de dérivation (53), faisant que, à mesure que la haute pression de fluide en amont (42) augmente, l~organe de piston (47) intervient pour faire pénétrer l~organe de valve (44) plus loin dans l~orifice (41) afin de réduire le débit de fluide dans le système. Le contrôleur de débit (40) ci-décrit sert à piloter un dispositif de descente permettant à des personnes ou des charges de descendre d~emplacements situés en hauteur en cas d~urgence.

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