A pressure vessel having a relief area onto which a flange of a side port can be attached. The relief area includes a planar mating surface raised from the cylindrical sidewall of the vessel. A method for forming the pressure vessel includes providing a cylindrical mandrel provided with a side port spacer. Fiberglass is wrapped onto the mandrel and space. The fiberglass is impregnated with resin and the resin is cured. A metallic insert ring is embedded in a full bore open end of the pressure ve...

A pressure sensor is a micro-electro-mechanical vibrating device, with a silicon substrate (15; 15') onto which a single-layer or multilayer vibrating assembly (121; 221; 321) is formed. It comprises an electrode (21; 21'), which makes the assembly to oscillate relative to the substrate at the resonance frequency or at another known frequency, and a detector for detecting the actual frequency and/or amplitude of said oscillation. The actual frequency and/or amplitude are affected by the conditio...

A water pressure switch employs two pivotable plates and springs to control the activation of the pump. The arrangement of the two pivotably plates, the springs and the activation device reduces the space required so that a small box can accommodate all the parts.

A pressure sensor for detecting a pressure and for outputting a signal based on the piezoresistance effect includes a substrate having a sensor chip on one side in a thin portion and a concave portion on another side, a piezo-resistor in the sensor chip, a pedestal being attached to the substrate and having a through hole for introducing the pressure to the sensor chip and a gel material filled in the concave portion and the through hole for protecting the sensor chip. A ratio of a diameter of t...

An waterwheel (6) using a spiral pump (1) which is attached to a scoop assembly (3) which runs the air and fluid to a separator tank (9), which then allows the air to an air turbine (15) and the fluid to a hydro turbine (16) will produce pressure which will turn the turbines listed which in turn will rotate an electrical generator producing electricity. This system changes the flow of the river in to rotation movement, which produces pressure, which produces mechanical rotational movement to tur...

A pressure sensor for sensing a pressure level of a pressurized medium. The pressure sensor includes a housing that has a high pressure side, a low pressure side and an aperture. A substrate is located in the aperture. The substrate has a pair of ends and a center portion. The center portion is brazed to the housing in the aperture. The center portion seals the high pressure side from the low pressure side. A pressure sensitive resistor is mounted to one end of the substrate. A reference resisto...

A pressure sensor for sensing a pressure level of a medium. The pressure sensor includes a rigid substrate having a medium contacting side and a pressure sensitive resistor mounted on the medium contacting side. The resistor exhibits a change in resistance in response to pressure changes on the resistor above a predetermined threshold. Other embodiments of the invention are shown using a wheatstone bridge with pressure sensitive resistors and resistors that are insensitive to pressure changes.

The pressure transducer provided with a measuring chamber is separated by a medium which is to be measured by a separation membrane. A piezoelectric element is arranged on the measuring chamber which is filled with silicone oil, thereby enabling the specific volume of said chamber to be modified. An adjustable path of the measuring signal is compared to a reference path and considerable deviations indicate an error on the membrane. As a result, the state of the separation membrane can be monitor...

A pressure sensor for detecting a pressure of a pressure medium includes a casing having an element locating portion, a pressure detection element located in the element locating portion of the casing, and a gel member filled in the element locating portion to seal the pressure detection element. In the pressure sensor, the gel member is exposed from an opening portion of the element locating portion in the casing such that the pressure of the pressure medium is applied to the pressure detection...

A retrofittable pressure gauge for a spray gun includes a pressure sensor, located in a pressure chamber, a power source and a display unit, all enclosed within a case, a passageway providing fluid communication between the pressure chamber and a pressurised interior space of the spray gun when the gauge is mounted on the spray gun and a mounting fixture configured for mounting the pressure gauge at a spreader valve or a trigger operated fluid valve of the spray gun.