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| Number | Title | Issue Date |
| 5287726 | Method and apparatus for liquid cooled generator stator test and preparation therefor Method and apparatus for preparing stators of a fluid cooled generator for ground (megger) and other tests. The method of automatically cycling into stator cooling coils gradually incremented pressures of super-desiccated air followed by subsequent rapid ... | 02/22/1994 |
| 5279147 | Method for locating disruptions in electrical cable An apparatus and method for locating an obstruction, leak or fault in an electrical cable segment, and determining the extent thereof, comprising a method and apparatus for supplying an interruptible pressurized gas to the cable's interstitial void space,... | 01/18/1994 |
| 5279169 | Hydrogen monitoring apparatus An apparatus for measuring the diffusion of hydrogen atoms from a second surface to a first surface of a ferrous metal body in order to monitor the magnitude of corrosion occurring at the second surface. The apparatus comprises a chamber-defining member w... | 01/18/1994 |
| 5272909 | Method and device for testing venous valves A method and device for testing artificial or natural venous valves. The device comprises (a) a fixture for mounting a sample valve on a liquid flow path, (b) a muscle pump component and/or (o) respiratory pump component and/or (d) capacitance reservoir c... | 12/28/1993 |
| 5265464 | Production line O-ring test apparatus for a mass air flow sensor An O-ring test apparatus for a mass air flow sensor having a lift mechanism for lifting the mass air flow sensor and its production line carrier from the production line to a test location. In the test location, a clamping mechanism clamps the mass air fl... | 11/30/1993 |
| 5255557 | Apparatus for testing a tube for its strength to resist internal pressure An apparatus for testing a tube for its strength to resist internal pressure, is composed of: an expandable elastomer having a hollow body with one open end; a test head, connected to the expandable elastomer, to provide the expandable elastomer with pres... | 10/26/1993 |
| 5255558 | Method and device for testing condoms A method and device (10) for testing condoms, the device (10) comprises a perforated, elongated plastic, cylindrical member (12) having a head (14) at one end thereof, a body (16) and a base (18) at the other end thereof. Fitable into the hollow interior ... | 10/26/1993 |
| 5245640 | Nuclear fuel rod end plug pressurization hole inspection apparatus To inspect the integrity of pressurization holes in nuclear fuel rod final end plugs, quality assurance apparatus includes an adapter providing a test chamber into which an end plug is inserted. Instrument gas is introduced into the test chamber through a... | 09/14/1993 |
| 5212979 | Testing device for measurement of a leak rate of a spraying or injection valve The testing device for measurement of a hydraulic leak rate of a spraying valve (11) with a closable outlet opening(11B) includes a vessel (10) filled with an indicating liquid (12) and a device for holding the valve to be tested with the outlet opening (... | 05/25/1993 |
| 5209103 | Apparatus for monitoring the quality of the surface state of a part The apparatus comprises an air flow duct having an end portion fitted inside a nozzle whose front surface is trued so that it can be applied against the surface to be scanned and so that it can co-operate therewith to form a leak through which air flows a... | 05/11/1993 |
| 5207089 | Method for measuring the control cross section area of a nozzle The method for measuring the cross-sectional area of a nozzle by a pneumatic through-flow method with supercritical pressure ratio measures the volume flow flowing through the nozzle on its input side by a differential pressure measurement at a resistance... | 05/04/1993 |
| 5189903 | Sliding strip for collector with rupture detection device A carbon sliding strip for a collector has a rupture control device, comprising a pressure line (9) incorporated directly in the carbon strip (1), a device (13) for producing increased pressure in the pressure line and a pressure detector (15), which dete... | 03/02/1993 |
| 5182076 | Method for monitoring the emplacement of a transportable element and the tightness of its joint with a fixed structure, and the use of this method The fixed structure (10) incorporates an abutment surface (10a) upon which a corresponding abutment surface (8a) of the transportable element (1) comes to bear, with the interposition between the abutment surfaces (8a, 10a) of at least two concentric annu... | 01/26/1993 |
| 5176153 | Heart chamber simulator with electronic accelerated heart valve wear and fatigue test apparatus and method An accelerated wear and fatigue tester for replacement human heart valves includes a fluid which is caused to pulse the heart valve by a pressure generator utilizing a coil secured to a flexible diaphragm in contact with the fluid. The coil is subjected t... | 01/05/1993 |
| 5127260 | Method of testing the strength of seams in plastic sheets Current state-of-the-art requires welded seams between adjacent sheets of material, e.g. polyethylene to be tested for leaks using vacuum, ultrasonic or low pressure air techniques. In general, the devices used are somewhat complicated and consequently ex... | 07/07/1992 |
| 5119681 | Test fixture A test fixture for testing a specimen under compressive or tensile load under close, reproducible tolerances and conditions. Confronting platens having surfaces which act against the specimen are provided with an in-line wedge assembly which drives the pl... | 06/09/1992 |
| 5113705 | Functional testing of solenoid valves in air A solenoid valve that is to be used to control flow of a liquid medium is tested in a test fixture which applies a leak test, a flow test, and a response test using a gas as a test medium. The test results are compared with a test specification that has b... | 05/19/1992 |
| 5106546 | Method of testing the operative condition of dies provided with cooling sections A method is described in which the operative condition of the cooling sections of a slot die for making flat films of thermoplastic material, or of an annular die of a blow molding extruder for making tubular films from synthetic thermoplastics, is tested... | 04/21/1992 |
| 5092161 | Duct testing A technique for detecting faults, blockages or holes, in a duct (6). A burst of compressed gas is injected into the duct and the decay of the pressure pulse monitored by a transducer at the gas burst launch end of the duct. A reference decay pressure that... | 03/03/1992 |
| 5081862 | Apparatus and method for pressure testing closure disks A method and device for testing the burst pressure of closure disks which provides high pressure to both sides of a disk and rapidly releases pressure from one side thereof causing a high rate of change of pressure. A hollow notched plug allows the rapid ... | 01/21/1992 |
| 5078005 | Method and apparatus for checking the bonding of a cellular structure to a support The bonding of a honeycomb structure to a support at one end of the cells of the structure is checked by applying a detector to the opposite end of the cells, the detector comprising first and second compartments which are separated by a partition, supply... | 01/07/1992 |
| 5074146 | Gas comparison pycnometer A gas comparison pycnometer is disclosed which provides a method and apparatus for determining and checking the accuracy of the volume of a solid substance. The pycnometer is also outfitted with a unique cap assembly which fixes the volume in the pycnomet... | 12/24/1991 |
| 5056356 | Nondestructive testing of penetrable material bond interfaces A fluid injection method of nondestructive testing for bonding between two layers of material, at least one of which is penetrable is presented. One or two fluid injection members are inserted at selected locations along the penetrable material to the bon... | 10/15/1991 |
| 5056352 | Method and apparatus for generating a precisely defined dynamic pressure pulse Method and apparatus for generating a precisely defined dynamic pressure pulse. A rigid pressure chamber contains a pressure transmission agent. The pressure chamber has a through opening in which is disposed a piston. A drop weight outside the pressure c... | 10/15/1991 |
| 5048330 | Materials testing machine A materials testing machine for testing equipment used for lifting or jacking up of objects. The machine has a frame with a generally horizontal arm extending outwardly therefrom. A hydraulic cylinder assembly is positioned along the horizontal arm and is... | 09/17/1991 |
| 5048329 | Hydraulic valve test device Apparatus for testing a solenoid-actuated, hydraulic valve under actual operating conditions in a closed hydraulic system includes two pressure gauges to monitor valve switching pressure as well as electrical control switches and a test lead to power the ... | 09/17/1991 |
| 5025657 | Process and device for testing the tightness of a flexible plastic container In a process for testing the tightness of a flexible collapsible container which in condition of use is sealed by means of a screw cap screwed on a spout, the container is evacuated after its manufacture, tightly sealed and subsequently subjected to atmos... | 06/25/1991 |
| 5001935 | Method and apparatus for determining the environmental stress crack resistance of plastic articles A method and apparatus for determining the environmental stress crack resistance of plastic articles, such as polyethylene terephthalate containers, are provided. In accordance with the method of the invention, the internal chamber of a hollow plastic art... | 03/26/1991 |
| 4976272 | Method and device for measuring the elasticity of a superficial layer, in particular of the skin The method for measuring the elasticity of a superficial layer (2), in particular of the skin, comprises defining a zone (7) of this layer; creating a negative pressure in this zone to cause a deformation of the zone; and measuring the negative pressure n... | 12/11/1990 |
| 4955398 | Relating to the monitoring of rod-like articles The invention is based on the realization that for a rod-like article, a cigarette for example, having a plurality of ventilation gas flows, the flows can be equated to a single equivalent flow nominally occurring at an "equivalent ventilation point". By ... | 09/11/1990 |
| 4947676 | Pneumatic ball drop checker device and method A pneumatic sensing device is presented which automatically senses the motion of a ball falling into a can. A sensing arm protrudes into the pathway of the dropping ball. When the ball hits one end of the arm, the other end of the arm rotates upward and c... | 08/14/1990 |
| 4930341 | Method of prepping a dilatation catheter A method of testing a dilatation balloon catheter prior to use which comprises purging and priming the balloon catheter with a balloon protector in place about the balloon.... | 06/05/1990 |
| 4928255 | Method and apparatus for explosion protection of plants, pipelines and the like by pressure monitoring The invention discloses a method and an apparatus for explosion protection of plants, pipelines and the like by monitoring chronologically successive values of the system pressure in the potentially explosive area and by comparing these values with a pred... | 05/22/1990 |
| 4918968 | Apparatus and method of detecting leaks in pressurized piping systems A leak detector including a fill cylinder and a pressure cylinder mounted in spaced relationship on a frame. The fill cylinder includes a movable liquid-tight piston, valved ports on one side of the piston, and a vent port on the opposite side. The pressu... | 04/24/1990 |
| 4916936 | Device for testing packages A device for testing a package having, a device for passing a fluid inside the package, and a device for selectively controlling the rate of pressure increase inside the package by the passing device.... | 04/17/1990 |
| 4910997 | Fluctuating stress generating apparatus and method Apparatus for applying a fluctuating stress to, for example, a gable end of a house includes a pressure enclosure. An air compressor is connected to the pressure enclosure via a series of gauged valves whose positions are continuously variable between lim... | 03/27/1990 |
| 4903529 | Valve system analyzer A method for testing an hydraulic device of an hydraulic control system, the system having a source of hydraulic fluid under pressure and a fluid reservoir, and the device having a fluid inlet which is releasably coupled to the source when the system is i... | 02/27/1990 |
| 4893494 | Method and system for testing safety relief valves A method and system for testing safety relief valves utilizes a reservoir of high pressure fluid which is metered into a smaller pressure vessel in communication with the safety relief valve to be tested. The method and system permits a safety relief valv... | 01/16/1990 |
| 4888718 | Volume measuring apparatus and method A volume measuring apparatus comprises pair of tanks of substantially the same volume for supplying gas to a container to be measured and a refernce container, a pressurized gas source for filling the pair of tanks with gas under the same pressure, a volu... | 12/19/1989 |
| 4885930 | Garment pressurizing apparatus Prior to pressurizing a garment at an opening therein, interior and exter elements are drawn together along the longitudinal axis of a tube through which the pressurizing gas is applied, to grip the garment around the full periphery of that opening. In o... | 12/12/1989 |
