Lohkamp
Thomas Lohkamp, Phoenix, AZ US
Patent application number | Description | Published |
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20120186657 | PIEZOELECTRIC PROPORTIONAL CONTROL VALVE - Examples are generally described that are related to a control valve. Some example devices may include a control valve having a piezoelectric actuator substantially immersed in a fluid and further having a sealing mechanism configured to be in a closed position and an open position. The piezoelectric actuator may be configured to distort in response to an applied voltage causing the sealing mechanism to open and allow fluid to flow therethrough. In response to removing the applied voltage, the piezoelectric actuator returns to an undistorted position causing the sealing mechanism to close and prevent fluid from flowing therethrough. | 07-26-2012 |
Thomas A. Lohkamp, Phoenix, AZ US
Patent application number | Description | Published |
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20090314055 | SYSTEM TO CONTROL PRESSURE IN A TEST DEVICE - Embodiments of the present invention are directed toward pressure controllers and calibrators for setting or measuring pressures in test devices. In one embodiment, the pressure controller contains a dual reference pressure controller. The dual reference pressure controller is operable to maintain two different pressures relative to a reference pressure. The first pressure being a relatively fixed amount greater than the reference pressure and the second pressure being a relatively fixed amount less than the reference pressure. | 12-24-2009 |
20110220222 | SYSTEM TO CONTROL PRESSURE IN A TEST DEVICE - Embodiments of the present invention are directed toward pressure controllers and calibrators for setting or measuring pressures in test devices. In one embodiment, the pressure controller contains a dual reference pressure controller. The dual reference pressure controller is operable to maintain two different pressures relative to a reference pressure. The first pressure being a relatively fixed amount greater than the reference pressure and the second pressure being a relatively fixed amount less than the reference pressure. | 09-15-2011 |
Tom Lohkamp, Phoenix, AZ US
Patent application number | Description | Published |
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20120285554 | Apparatus Using Electronically-Controlled Valves - The pumps and pressure controllers described herein aim to pump fluid in two directions, such as from a first port to a second port and vice versa. The pressure controllers aim to control pressure in a system or device, such as a test device, accurately and precisely at a variety of different pressure levels. Generally described, the pumps and pressure controllers described herein may include two or more control valves, which may be actuatable in such a manner so that the pump or pressure controller can switch between operating as a vacuum pump and operating as a compressor. In some embodiments, the pressure controllers may be able to adjust a pressure in the device by small increments thereby providing increased control of the pressure in the device over the prior art. Furthermore, the pressure controllers may be able to control the pressure of a system having low pressure levels. | 11-15-2012 |