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US 2003/0196701 A1Published application
Pressure regulator with internal filter
AssigneeTescorn Corporation
InventorsBrian Claire, Bruce Le Gare
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AssigneeTescorn Corporation
InventorsBrian Claire, Bruce Le Gare
Estimating the term…
The pressure regulator has a regulator body with a control chamber and outlet and inlet passageways opening thereto, a bonnet with a bonnet chamber and a diaphragm separating the chambers. A filter housing is mounted in the control chamber and mounts a filter and a valve seat that opens to the inlet passageway while spring urged mechanism moves the a valve stem to permit fluid flow through the valve seat and into the control chamber between the filter and diaphragm when the pressure therein falls below a preselected level, and thence through the filter to the outlet passageway. When the pressure in the outlet passageway is at or above a preselected value, the pressure acts against a diaphragm whereby the piston retains the valve stem in a fluid flow blocking position.
A pressure regulator assembly comprising a regulator body having a control chamber that in part is defined by a bottom wall and outlet and inlet passageways opening through the bottom wall to the control chamber in spaced relationship to one another, a bonnet mounted to the regulator body and having a bonnet chamber opening toward the control chamber, diaphragm means for separating the control chamber from the bonnet chamber, control means extending within the bonnet chamber for resiliently urging the diaphragm toward the control chamber bottom wall, a filter housing in the control chamber and having a central aperture opening to the diaphragm means and an opening that opens to the other passageway, a valve seat mounted to the filter housing and opening to one of the passageways and to the central aperture, a valve stem mounted to the control means and extended through the diaphragm means and the housing central aperture for abutting against the valve seat to block fluid flow from the one passageway to the central aperture until fluid pressure between the filter housing and diaphragm falls below a preselected level and then moving to an open position, the filter housing having a recess opening to the other passageway and to the diaphragm means, and filter means mounted in the recess for filtering fluid flowing from the central aperture to the other passageway.
A pressure regulator assembly comprising a regulator body having a control chamber that has a bottom wall and low pressure outlet and high pressure inlet passageways opening through the bottom wall to the control chamber in spaced relationship to one another, a bonnet mounted to the regulator body and having a bonnet chamber opening toward the control chamber, diaphragm means mounted by the bonnet and regulator body for separating the control chamber from the bonnet chamber, the diaphragm means including a diaphragm, control means extending within the bonnet chamber for resiliently urging the diaphragm toward the control chamber, a valve seat in the control chamber for having fluid flow from the inlet passageway and therethrough into the control chamber, valve means mounted to the control means and extending through the valve seat for movement between a closed position abutting against the valve seat to block fluid flow from the inlet passageway and through the valve seat and a position permitting fluid flow from the inlet passageway and through the valve seat, and filter means disposed in the control chamber in fluid communication with the valve seat and the outlet passageway for having fluid flow therethrough from the valve seat to the outlet passageway and filtering fluid flowing through the valve seat to the outlet passageway.
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Backward citations are indexed for grants only.
Without auxiliary power: the sensing element being a piston or plunger
With separate connected fluid reactor surface: with opening bias [e.g., pressure regulator]
Reactor surface closes chamber: valve head in inlet chamber
Valve head in inlet chamber: rectilinear valve stem rigid with reactor surface
Term end not estimated
This invention is for a pressure regulator that has a metal filter interposed in the regulator body between the regulator inlet and outlet.
U.S. Pat. No. 3,556,125 to Dowdall discloses a pressure regulator having a filter in the regulator housing to filter out dust in the fluid flowing from the inlet to the valve seat. A valve member is mounted to the diaphragm to extend through the valve seat and has an enlarged portion abuttable against the valve seat to block fluid flow therethrough until the pressure in the outlet falls below a preselected level.
In U.S. Pat. No. 5.090,438 to Nimberger there is disclosed a pressure regulator having a piston resiliently urged downwardly in the regulator body to resiliently retain a dart in engagement with a disc. The dart extends through an end portion of a nut that may be hex shaped. The disk is abuttable against the nut valve seat to block fluid flow from a high pressure inlet to the outlet. A filter assembly is threaded to the regulator body to have fluid flow from the regulator body inlet, then through the filter assembly and thence to the nut.
FIG. 1, other than for parts of the control knob and regulator body, is a cross sectional view of the pressure regulator of this invention that is shown in a view closed position;
FIG. 2 is an enlarged fragmentary view showing the filter and adjacent parts of the regulator;
FIG. 3 is a transverse cross sectional view of the filter housing that is generally taken along the line and in the direction of the arrows 3-3 of FIG. 2; and
Referring to the drawings, the pressure regulator of this invention, which is axially elongated and has a central axis C-C, includes a regulator body 10 having a control chamber 12 that opens through a transverse surface thereof. A bonnet 13 is threaded to the regulator body and has an axially elongated bore 14 forming a bonnet chamber that extend axially therethrough to open toward the control chamber.
A control knob 15 is mounted to an adjustment screw 17 which in turn is threadedly extending through the top reduced diameter portion 14A of the bore and into the intermediate diameter portion 14B of the bonnet bore. The lower end portion of the adjustment screw extends into the bore portion 14B to bear against the button 16 which in turn bears against one end of a load spring 19 for adjusting the compression of the load spring. The load spring extends into the bore of a piston 21 and abuts against the upwardly facing shoulder formed at the juncture of the enlarged and reduced diameter portions of the piston bore to constantly urge the piston toward the control chamber. The piston is located in the enlarged diameter portion 14C of the bonnet bore and has an enlarged diametric annular flange with a groove mounting an O-ring 18 to be in abutting engagement with the inner peripheral wall of the bonnet wall portion that defines bore portion 14C. The movement of the piston in a direction toward the control knob is limited by abutting against the annular shoulder defined by the intersection of bore portions 14B, 14C.
The end of bore portion 14C opposite bore portion 14B opens to a short, further enlarged bore portion 14D which in turn opens to the control chamber. One end of a balance spring 20 bears against the radial inner portion of a seal ring 22 while the opposite end of the balance spring bears against the piston flange to resiliently urge the piston in an axially upward direction (direction opposite the urging by the load spring). The radial outer portion of the ring seal seats against the annular shoulder formed by the junction of bore portions 14C, 14D while its radial inner portion is abuttable against an annular shoulder of the lower end portion of the piston to limit the downward movement of the piston.