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专利名称：Vacuum control valve for vacuum drainage
system
发明人：Douglas R. McPherson,George C.
Mendrala,James Ronning,Jay A. Shands
申请号：US133400申请日：20110429公开号：US09404588B2公开日：20160802
专利附图：
摘要：A valve for a vacuum drainage system includes a valve body having an interiorchamber operatively connectable to a suction device and through an outlet to a vacuum
source. A movable member having an aperture is secured within the chamber andmovable through points between closed and open positions to adjust the open area ofthe aperture and the fluid flow through the outlet. The aperture is configured such thatduring adjustment to increase the effective operational area of the aperture, a rate ofchange of the effective operational area increases non-linearly in relation to a linearincrease in the distance of travel, while providing advantageous and more controllablelinear adjustment of the applied vacuum. The aperture can have a trilateral shapeincluding at least one curved side, or comprise a plurality of sub-apertures, and themovable member can comprise a rotary sleeve.
申请人：Douglas R. McPherson,George C. Mendrala,James Ronning,Jay A. Shands
地址：East Granby CT US,Pittsfield MA US,Tacoma WA US,Belchertown MA US
国籍：US,US,US,US
代理机构：Christopher & Weisberg, P.A.
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