Engineered Products Company Patent applications |
Patent application number | Title | Published |
20110073420 | HIGH PRESSURE SWITCH - The present inventor devised, among other things, an exemplary pressure switch that includes a low-pressure switch housing portion and a high-pressure fitting portion. The low-pressure switch housing, which is formed of plastic for example, includes an electrical switch that can be turned on or off by moving a first contact between a pair of stationary contacts. The high-pressure fitting portion, which is formed of metal for example, has first and second barbed or threaded connector ends, which respectively engage an opening in the switch housing and a fluid line of an external system. An axial bore extending through the high-pressure fitting contains a piston which extends into the switch housing and is fastened to the first contact of the electrical switch. In operation, the piston travels within the bore in response to positive or negative pressure, moving the first contact toward or away from the stationary contacts to open or close the switch. | 03-31-2011 |
20090199645 | DIAL-TYPE FLOW-RESTRICTION GAUGES - Dial-type flow-restriction gauges are used for indicating flow-restriction conditions of fluid filters, such as automobile air and fuel filters. Prior versions of these type filters have been more complicated and costly to manufacture than desirable. Accordingly, the present inventors have devised, among other things, an exemplary dial-type flow-restriction gauge that is inexpensive to manufacture and performs reliability and consistently over a wide temperature range. One exemplary gauge includes an external dial that rotates relative a restriction scale in response to a differential pressure. Placement of the dial on the exterior of the gauge eliminates the need to use clear material and allows embedding of the restriction scale into an exterior surface of the gauge. | 08-13-2009 |
20090071392 | FLUID FLOW RESTRICTION INDICATOR - An indicator suitable for signaling restricted flow of a fluid through a filter mounted in a filter indicator includes a housing having an inner cavity. A diaphragm disposed within the housing separates the inner cavity into first and second chambers and deflects from a neutral position in response to applied pressures within the first and second chambers. A tab assembly opposite the diaphragm includes a spring-loaded flag moveable from a first position within the housing to a second position outside the housing. A pin operably coupled to the diaphragm holds the spring-loaded flag within the housing when the diaphragm is in the neutral position. In response to the diaphragm being deflected sufficiently from the neutral position to release the pin, the spring-loaded flag travels to the second position outside of the housing, thereby indicating a restrictive flow condition for the filter. | 03-19-2009 |