 High viscosity low pressure non-contact glue-dispenser |
| I claim: 1. A non-contact glue applicator for dispensing high viscosity adhesives which comprises, ... |
|
| Carbonated beverage mixing nozzle for a dispenser |
| An improved mixing nozzle for a post-mix beverage dispenser having a water outlet co-axially ... |
|
| Apparatus for throttling flow limitation in water fittings |
| OF THE PREFERRED EMBODIMENTS The throttling insert 1 made from an elastomeric material shown in ... |
|
| Apparatus for runnerless injection-compression molding thermosetting materials |
| OF THE INVENTION The present invention will illustrated and more fully described by reference to ... |
|
| Injection molding method with stamping compression |
| In the injection molding method with stamping compression according to the present invention, the ... |
|
| Process for molding plastic lenses |
| OF PREFERRED EMBODIMENT Referring now to FIGS. 1 and 2 of the drawings, it is shown, a process for ... |
|
| Method for manufacturing IC card substrate |
| An object of the present invention is to provide, with due consideration to the drawbacks of such ... |
|
| Method of engraving green ceramic articles |
| It is, therefore, an object of the invention to provide a method of engraving ceramic articles that ... |
|
| Hot sprue valve assembly for an injection molding machine |
| The present invention is embodied in an improved injection molding machine for use in producing ... |
|
| Hot sprue valve assembly for an injection molding machine |
| The present invention is embodied in a improved injection molding machine for use in producing ... |
|
|
Adjustable safety relief valve
| Details |
Inventors: Taylor, Wesley L.;
Assignee:
Primary Examiner: Schwadron; Martin P.
Assistant Examiner: Hepperle; Stephen M.
Attorney, Agent or Firm: Willian Brinks Olds Hofer Gilson & Lione Ltd.
An adjustable pressure relief valve is disclosed comprising a valve body having an inlet and an outlet, a valve seat associated with the inlet, a valve member configured to seal off the flow of fluids through the valve at the valve seat, an adjustment screw supported in the valve body to allow rotational but not longitudinal movement of the adjustment screw with respect to the valve body, a compression member connected to the adjustment screw and mounted within the valve body which moves longitudinally with respect to the adjustment screw when the adjustment screw is rotated and a resilient member biased between the compression member and the valve member. In the preferred embodiments, a connection between the adjustment screw and the valve member aligns the valve member with the valve seat. Also, the adjustment screw provides an unchanging stop surface to limit the lift of the valve seat as well as inside diameter guiding to prevent buckling of a helical spring used as the resilient member. |
|
DETAILED DESCRIPTION Due to its unique design, the adjustable pressure relief valve of the present invention is able to simultaneously achieve many advantages of the individual prior art valves.
The valve of the present invention comprises a valve body having an inlet and an outlet, a valve seat associated with the inlet, a valve member configured to seal off the flow of fluids through the valve at the valve seat, an adjustment screw supported in the valve body to allow rotational but not longitudinal movement of the adjustment screw with respect to the valve body, a compression member connected to the adjustment screw and mounted within the valve body which moves longitudinally with respect to the adjustment screw when the adjustment screw is rotated, a resilient member biased between the compression member and the valve member and means for connecting the adjustment screw with the valve member to align the valve member with the valve seat.
Through the use of a longitudinally stationary adjustment screw, several advantages are obtained.
First, the position of the adjustment screw with respect to the valve member does not change as the set pressure is adjusted.
The result is that the adjustment screw can also be used to limit the lift of the valve member during valve opening and prevent valve chatter.
Second, the valve member can be aligned with the valve seat using the adjustment screw.
In the preferred embodiment, a stem attached to the valve member extends into a hollow area inside the adjustment screw.
Third, when a helical spring is used as the resilient member, the adjustment screw can be used to guide the spring and keep it from buckling.
This is referred to as inside diameter guiding, meaning the inside diameter of the annular area occupied by the spring is just slightly larger than the outside diameter of the adjustment screw.
As a result, fairly long, weak springs can be used, which greatly improves the resolution of the set pressure.
There is no need to place the spring above a guide member, as in flanged-disk type valves, hence the valve body need not be extraordinarily long to house this type of spring
|
| Related patents |
|
|
Modulating pressure operated pilot relief valve
An object of the present invention is to provide a new and improved modulating, pressure actuated pilot operated relief valve. Another object of the present invention is ...
|
|
|
Modulating pilot operated safety relief valve for low pressure application
A modulating pilot valve is provided whereby a pair of differential area diaphragms are mounted on an actuator stem. The pair consists of a signal sensing diaphragm and ...
|
|
|
Non-flowing modulating pilot operated relief valve
The present invention provides a design which confronts the problems associated with the prior art pilot operated relief valves and, in so doing, presents a pressure ...
|
|
|
Safety relief valve
It is an object of this invention to provide full and rapid opening of a safety relief valve at a pressure slightly above a set pressure level, as well as full and rapid ...
|
|
|
Low-pressure pilot valve
The object identified above as well as other advantages and features are incorporated in an improved pilot valve for controlling a main valve. The pilot valve is of the ...
|
|
|
Over-pressure relief means
We claim: 1. In a reciprocating-piston, fluid-pressuring machine, having a cylinder, over-pressure relief means, comprising: a passageway, in said cylinder, which opens ...
|
|
|
Pressure relief valve
It is therefore an object of the present invention to provide a PRV in which product deposits retained inside the inlet to the PRV are minimized. It is a further object ...
|
|
|
Low leakage orifice-controlled poppet valve
An object of this invention is to provide a poppet-type valve with a hydrodynamically balanced pilot poppet which is simple to assemble. Another object of this invention ...
|
|
|
Apparatus for supporting an electric blower of a vacuum cleaner
It is therefore an object of the present invention to provide a new and improved apparatus for supporting an electric blower which overcomes the above-mentioned ...
|
|
|
Can filling machine having a mechanism to prevent overfill
I claim: 1. In a can filling apparatus, a tubular housing having an upper end communicating with a supply of liquid, a fill tube mounted for sliding movement relative to ...
|
|
|
Control Computers 
