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1. 发明授权

US08684022B1 Condensate drain clearing device and method 有权
标题翻译：冷凝水排污装置及方法
公开(公告)号：US08684022B1
公开(公告)日：2014-04-01
申请号：US13752579
申请日：2013-01-29
申请人： Richard Dean McFarland
发明人： Richard Dean McFarland
IPC分类号： B08B1/00
CPC分类号： B08B9/0436 , F24F13/222 , F24F2013/227 , F24F2221/22 , Y10T137/0435
摘要： A device to clear a blockage from an HVACR condensate drain line. A piston connected to a rod with a handle is inserted directly into the distal or outlet end of a condensate drain pipe and then rapidly withdrawn to create a vacuum or suction within the drain line. When sufficient suction pressure is created, it will dislodge a blockage in the drain line. Typically the piston has a proximal end with a diameter slightly greater than the inside diameter of the condensate drain pipe. Upon removal of the device from the drain pipe, the proximal end is caused to expand to its full diameter, creating an airtight and fluid tight seal with the inner diameter of the drain pipe, allowing for the creation of negative pressure and/or suction upstream to dislodge the blockage.
摘要翻译：清除HVACR冷凝水排放管道堵塞的装置。连接到具有手柄的杆的活塞直接插入冷凝水排放管的远端或出口端，然后迅速抽出，以在排水管线内产生真空或抽吸。当产生足够的吸入压力时，它将排除排水管路中的堵塞。通常，活塞具有近端，其直径略大于冷凝水排放管的内径。当从排水管中取出设备时，使近端膨胀至其全直径，产生与排水管内径的气密和流体密封，从而允许产生负压和/或上游的吸力以阻止堵塞。

2. 发明授权

US09851274B2 Portable pressure switch calibration and diagnostic tool 有权
公开(公告)号：US09851274B2
公开(公告)日：2017-12-26
申请号：US15464467
申请日：2017-03-21
申请人： Richard Dean McFarland
发明人： Richard Dean McFarland
IPC分类号： G01L27/00 , H01H35/24
CPC分类号： G01L27/002 , G01L27/005 , H01H11/0062 , H01H35/24 , H01H35/2607
摘要： An apparatus for calibration and testing of pressure switches which are used in residential and commercial HVAC systems. The apparatus can be used to test, set, or adjust a pressure switch or a pressure signal transducer to the manufacturer's specifications. The apparatus includes an exterior housing with an on/off switch and at least one vacuum inlet nozzle, and the inside of the housing includes an air compressor to which the amount of voltage supplied can be manually controlled. The air compressor typically operates from a battery power supply located within the housing. A pressure measuring device, such as a differential pressure gage, and a conductivity indicator are typically used in conjunction with the device to calibrate adjustable pressure switches and to test and diagnose faulty pressure switches. The apparatus can include the pressure measuring device and/or the conductivity indicator within its housing.

3. 发明授权

US09640344B2 Portable pressure switch calibration and diagnostic tool 有权
公开(公告)号：US09640344B2
公开(公告)日：2017-05-02
申请号：US14175188
申请日：2014-02-07
申请人： Richard Dean McFarland
发明人： Richard Dean McFarland
IPC分类号： H01H11/00 , H01H35/26
CPC分类号： G01L27/002 , G01L27/005 , H01H11/0062 , H01H35/24 , H01H35/2607
摘要： An apparatus for calibration and testing of pressure switches which are used in residential and commercial HVAC systems. The apparatus can be used to test, set, or adjust a pressure switch or a pressure signal transducer to the manufacturer's specifications. The apparatus includes an exterior housing with an on/off switch and at least one vacuum inlet nozzle, and the inside of the housing includes an air compressor to which the amount of voltage supplied can be manually controlled. The air compressor typically operates from a battery power supply located within the housing. A pressure measuring device, such as a differential pressure gage, and a conductivity indicator are typically used in conjunction with the device to calibrate adjustable pressure switches and to test and diagnose faulty pressure switches. The apparatus can include the pressure measuring device and/or the conductivity indicator within its housing.

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