Patent · US Expired

Low Bernoulli force control orifice

US5253676A · kind A · utility

10Cited by
4References
6Claims
0Family size

Assignee

Inventor

Key dates

Filing dateAug 13, 1992
Grant dateOct 19, 1993
Priority date—
Expiry dateAug 13, 2012

Classification

  • Technology area (CPC Y)Emerging Cross-Sectional Technologies
  • CPC primaryY10T137/86614
  • WIPO fieldControl
  • WIPO sectorInstruments

Abstract

A controlled orifice for a hydraulic pressure control valve has a plunger and a conic orifice seat. The plunger has a head which forms a stagnation zone, and a rim with surfaces that define a sharp edge, these surfaces making an angle of at least 30 degrees with the conic bore orifice seat. A conic back surface extends to the plunger stem. The sharp edge of the rim forms a small annular vena contracta so that the regions where rapid flow is experienced are kept as small as possible. This reduces undesirable Bernoulli forces.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.