A detector for sensing and signalling leakage in a closed fluid system, the detector having inlet and outlet passages connected by parallel main and secondary channels. The main channel is provided with normally closed sealing means to prevent communication between the inlet and outlet passages, and the secondary channel is provided with an element that moves in response to a pressure differential across the secondary channel. The main channel sealing means opens in response to a threshold diffe...

A leak detection device is provided with an elongated handle having a head member disposed at one end. The device has a low profile for easy insertion beneath an appliance. The head member is configured to be easily oriented around wheels or other supports while positioning a testing arm below the water line connection. The device is adaptable for use with appliances having different configurations of wheels and can easily be reused. The function of the device lends itself to simple and inexpens...

A leak clip that can be applied through a trocar to immediately close off the entire opening in an internal organ, thereby preventing the leakage of contaminating fluids in the surrounding tissue.

A leak tester which detects leakage of a gas from a measured object, the leak tester including a source of a pressurized gas which supplies the pressurized gas, a differential pressure detecting section which detects a pressure difference between the pressure of a gas in the measured object and the pressure of a pressurized gas supplied by the source of the pressurized gas, and a pressure adjusting section which makes the pressure of the pressurized gas supplied by the source of the pressurized ...

A device for detecting leaks in containers that are open to the effects of rain and/or evaporation comprising an outer cylinder or container suspended in a container or vessel to be measured, such as, a swimming pool, an inner tube, an outer floating tube, an inner floating indicating rod and a float attached to the end of the floating indicating rod. The device is suspended in a swimming pool by a chain or rope attached to the outer cylinder. The inner tube is fastened to the bottom of the oute...

A leak detector is provided for detecting and indicating a leak opening of seam in a mortar increment container or the like. This will work with porous or non-porous materials. The leak detector includes a plurality of thermistors arranged to sense selective portions of the seam, and a process circuit for receiving respective signals from the thermistors for identifying and displaying a leak condition or a no-leak condition or a bad-thermistor condition.

A leak checker for checking the static and pitot pressure systems of an aircraft for leaks which has first and second conduit means connectable respectively to the static and pitot pressure systems of the aircraft and a control valve for limiting the rate of evacuation or pressurization of the static pressure system. An indicator is operatively coupled to one of said conduits for providing an indication of leakage into or out of the pressure system. The checker also includes a valve limiting the...

This invention relates to a leak tester for testing the tightness of a test object such as a fuel feed apparatus for an internal combustion engine, and specifically to a leak tester for testing the air tightness of a fuel feed apparatus provided with a first opening and a second opening and having a space portion between the first and second openings. The leak tester is provided with a master (reference chamber) having substantially the same internal volume as the fuel feed apparatus, a pneumati...

A reference leak includes a leak layer formed of one of a metallic material, a glass material, and a ceramic material. The metallic material is selected from the group consisting of copper, nickel, and molybdenum. The leak layer comprises a number of substantially parallel leak through holes defined therein. The leak through holes may be cylindrical holes or polyhedrical holes. A length of each of the leak through holes is preferably not less than 20 times a diameter thereof. A diameter of each ...

A leak detector for detecting flow of at least partially conductive fluid includes two electrodes and an electrical circuit. A valve device including an actuator is constructed to receive open and close signals for opening and closing the valve device between an input port and an outer port. The two electrodes are located on opposite sides of the valve device and are electrically isolated from each other in absence of the liquid flowing between the input port and the output port. The electrical ...