Darrell S.
Darrell S. Filtz, Cedarburg, WI US
Patent application number | Description | Published |
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20120103769 | ELECTRICAL SWITCH LATCH ASSEMBLY - A latch assembly is provided for securing a switch operator to a contact block. The latch assembly includes a collar designed to retain the switch operator in the latch assembly. The latch assembly also includes a housing having one or more apertures for receiving fasteners to secure the contact block to the latch assembly. The collar is displaceable within the housing between a locked position that secures the switch operator and an unlocked position that permits disengagement of the switch operator from the collar. When the collar is in the locked position, corresponding apertures in the collar align with the one or more apertures in the housing, permitting the fasteners to be inserted through the collar apertures. Insertion of the fasteners through the collar apertures secures the collar in the locked position, thereby impeding unintentional disconnection of the switch operator from the latch assembly. | 05-03-2012 |
20130234620 | LED Driver Circuits and Methods - An LED driver circuit that can regulate the input signal voltage so that the driver circuit can be used over wide input voltage range or at predetermined voltages. Discrete components are used to drive an LED array with a constant current. The LED driver circuit includes a dynamic current regulator. The dynamic current regulator includes a resistor and capacitor in parallel to provide dynamic current regulation to a switching mode power supply circuit that controls the LED illumination. | 09-12-2013 |
20140213098 | Cable Connector - A cable connector for receiving a cable and a connector block. The cable connector including a first shell element with a first strain relief holding feature, a first connector block receiving feature, and a recess; a second shell element with a second strain relief holding feature, a second connector block receiving feature, and a projection; and a strain relief element defining a cable aperture sized to receive the cable, a compression collar, and a wing portion. The projection is received within the recess. The first and second strain relief holding features cooperate to support and maintain the strain relief element. The first and second connector block receiving features cooperate to support and maintain the connector block. The wing portion of the strain relief element is arranged to increase a holding ability of the strain relief element when a twisting or axial force is applied to the cable. | 07-31-2014 |
Darrell S. Kosakewich, Edmonton CA
Patent application number | Description | Published |
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20100263869 | METHOD AND APPARATUS FOR STIMULATING PRODUCTION FROM OIL AND GAS WELLS BY FREEZE-THAW CYCLING - In a well stimulation method, a subsurface formation is fractured by freezing a water-containing zone within the formation in the vicinity of a well, thereby generating expansive pressures which expand or created cracks and fissures in the formation. The frozen zone is then allowed to thaw. This freeze-thaw process causes rock particles in existing cracks and fissures to become dislodged and reoriented therewithin, and also causes new or additional rock particles to become disposed within both existing and newly-formed cracks and fissures. The particles present in the cracks and fissures act as natural proppants to help keep the cracks and fissures open, thereby facilitating the flow of fluids from the formation into the well after the formation has thawed. Preferably, the freeze-thaw steps are carried out on a cyclic basis. Optionally, propagation of the freezing front into the formation may be enhanced by the introduction of low-frequency wave energy into the formation. | 10-21-2010 |
20100263874 | METHOD AND APPARATUS FOR FREEZE-THAW WELL STIMULATION USING ORIFICED REFRIGERATION TUBING - A method and apparatus for introducing refrigerant into a wellbore, for freeze-fracturing a selected region of a subsurface formation, uses refrigerant diffuser pipe having multiple orifices in a selected pattern along a designated section of its length. The orificed supply tubing is disposed within a refrigerant return conduit, thereby forming a tubing annulus. A flow of liquid refrigerant is introduced into the diffuser pipe and flows through the orifices into the tubing annulus, with the orifices acting as expander means creating a pressure drop and causing vaporization of the refrigerant as it passes into the annulus. To facilitate use of the same diffuser pipe in different wells having different requirements, a helical orifice-isolation wrap may be disposed around the diffuser pipe, with the orifice-isolation wrap having orifice-plugging elements arrayed to effectively block fluid flow through selected orifices, while leaving other orifices open as required. In this way, it is possible to design diffuser pipes with particular orifice arrangements that will accommodate two or more different isolation wraps, with each different wrap plugging different patterns of orifices. | 10-21-2010 |
Darrell S. Kosakewich, Camrose CA
Patent application number | Description | Published |
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20140216728 | SYSTEM AND METHOD TO INITIATE PERMEABILITY IN BORE HOLES WITHOUT PERFORATING TOOLS - A shockwave generator pre-treats one or more production zones within a well to facilitate recovery of liquid and gaseous hydrocarbons from the well. The well may be heated to a particular temperature, where after a cooling agent is introduced through the shockwave generator which effects a cooling action in the walls of the well and induces cracking which is propagated by the tremors or shocks of the cooling agent as it exits the generator. The initiated cracks may be further propagated using one or more additional stimulation methods, including a freeze-thaw method which is implemented through a subsystem having overlapping components with the shockwave generator subsystem. | 08-07-2014 |