Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 4157656 | Leak detection system A system is disclosed for detecting the leakage of fluid from a container by measuring the decay of an initial pressure input. The system employs an axially displaceable piston having a first surface exposed to fluid pressure within the container, and a s... | 06/12/1979 |
| 4154091 | Tank tightness test apparatus In a tank system tightness tester of the general type disclosed in U.S. Pat. No. 3,580,555, a vertically elongated, flexible and resilient, annular diaphragm is provided for sealing against the fill pipe going down into the underground storage tank. The d... | 05/15/1979 |
| 4126034 | Method and apparatus for container pressure testing Containers having top head openings are inserted axially without prealignment into a test chamber which houses a sealing member having a sealing surface radially continuous about the container insertion axis. The container interior and the extent of the t... | 11/21/1978 |
| 4119950 | Gas detection Apparatus for monitoring gas content on a site, to provide an indication if an undesirable gas content occurs, comprises a transmitter for feeding ultrasonic waves through the gas to a receiver. The ultrasonic waves are frequency-modulated and the phase o... | 10/10/1978 |
| 4118972 | Apparatus for detecting leaks in composite packages Apparatus for testing leakage of composite packages is disclosed. The apparatus includes a hollow arbor for supporting a composite package to be tested for leakage, the open end of the composite package being sealed to a support for the hollow arbor, the ... | 10/10/1978 |
| 4110947 | Storage tank installation An underground storage tank installation. The excavation is to a predetermined depth to permit placement of a storage tank of desired size therein below ground level. At least a pair of opposing side walls of the excavation are sloped to minimize the dang... | 09/05/1978 |
| 4110739 | Means for detecting leakage in the inner lining of tanks and piping A laminated vessel or pipe having an outer wall of fibreglass reinforced polyester, an inner wall of corrosion resistant thermoplastic and an electrical conductive layer between the inner and outer walls. A probe of inert material is inserted into the tan... | 08/29/1978 |
| 4106263 | Apparatus for pressure testing of containers Container pressure testing apparatus includes a housing having an open portion for sealably engaging the container surface circumscribing a pour opening of the container. Pressurized air is issued from the housing through the pour opening into the contain... | 08/15/1978 |
| 4099404 | Automatic air leak testing apparatus and method for batteries Containers, such as batteries, battery cases and the like, are moved along a first conveyor to a leak testing station, above which is located an assembly having means matable over the openings in the top of the container. The container is supplied with ai... | 07/11/1978 |
| 4097852 | Fault detector for liquid immersed inductive apparatus A device for detecting electrical faults internal of a liquid and gas containing power transformer. Portions of two electrically nonconducting chambers are immersed in, and each chamber has an opening into, said liquid. One of said openings permits the re... | 06/27/1978 |
| 4078421 | Method and automatic device for the testing of tight cavities A method for testing tight cavities for leaks by a pressurization or depressurization technique (as herein defined), wherein a comparison is effected by means of a differential signal transmitter responsive to the difference between the pressure existing ... | 03/14/1978 |
| 4069704 | Variable length encapsulating pressure drop tester An apparatus for testing tobacco smoke filter rods and similar articles of varying lengths for pressure drop across the opposed ends of a rod encapsulated in an air-impervious sleeve comprising a housing having a longitudinal bore, a rod receptacle having... | 01/24/1978 |
| 4064036 | Pressure testing of catalyst loaded reactors In the pressure testing of catalyst-loaded reactors with nitrogen gas at elevated temperatures, it is found that certain types of zeolite catalysts are substantially degraded in activity. The catalysts concerned comprises a Group VIII noble metal in an ox... | 12/20/1977 |
| 4055984 | Device for detecting leaks in flexible articles A device adapted to detecting leaks in an article having readily deformable walls has conventional arrangements for performing a leak detection by overpressure or by vacuum and has a deformable backup wall for engagement with the walls of the article. The... | 11/01/1977 |
| 4055985 | Apparatus for testing the surface quality of a vessel mouth An apparatus for testing the surface quality of a vessel mouth including a test head adapted to be placed over the vessel mouth, a line connecting the test head to a supply of test gas, a passageway through the test head for introducing gas into the vesse... | 11/01/1977 |
| 4034286 | Device for detecting a failure in an insulation system An apparatus for detecting a leak in an insulation system utilizing a plurality of sensing devices disposed in a grid-like arrangement in heat transfer relationship to the insulation. Each sensing device comprises a small enclosed chamber filled with an i... | 07/05/1977 |
| 4033175 | Gas leakage measuring device An apparatus for measuring gas leakage including a hollow container having a gas inlet port which is connected to a reference pressure gas supply via a valve and another gas outlet port that is connected to a test container; a liquid container located in ... | 07/05/1977 |
| 4027513 | Sealing device for can testing machines An improved, long lasting sealing ring for closing the open end of a can while vacuum is applied thereto to test for porosity. The ring comprises an outer pad of soft elastomer material made preferably of polyeurathane of relatively low durometer and havi... | 06/07/1977 |
| 4019370 | Leak testing device and method for plastic bottles Plastic bottles from a molding machine are transported on a conveyor through a leak testing device where a predetermined number are temporarily stopped in register with overhead reciprocable test heads and with lateral ejectors on one side of the conveyor... | 04/26/1977 |
| 4012945 | Means for testing containers for leakage A device for testing containers for leakage comprises a diaphragm box, in which a chamber is adapted to be connected to a test container or to a casing enclosing the container. At a change of the pressure the diaphragm closes a switch in an electric circu... | 03/22/1977 |
| 3995472 | Detector system A system to detect leaks, monitor levels, activate alarms, etc. in which a specific material in the system dissolves or disintegrates on contact with a liquid, gas or vapor which is to be monitored.... | 12/07/1976 |
| 3995473 | Inspection head An inspection head to test objects such as plastic bottles for absence of leaks and crushing resistance includes a column having a seal for an aperture in the object which may be applied to the object to exert a crushing force and a fluid supply source to... | 12/07/1976 |
| 3987664 | Dry-testing system for detecting leaks in containers A leak detection system capable of efficiently dry-testing containers such as steel drums of large capacity. The system includes a test station constituted by a hermetically-sealed chamber adapted to receive a container to be tested and provided with a re... | 10/26/1976 |
| 3967256 | Integrity monitoring system for storage tank insulation The invention provides a method and apparatus for detecting impairment of the integrity of barriers used for the containment of fluid materials, particularly fluid materials at cryogenic temperatures, e.g., liquefied natural gas. The detection system empl... | 06/29/1976 |
| 3958448 | Test apparatus for pressurized container and method A pressure testing apparatus for sealed containers including a container receiving enclosure defined by a base wall, a side wall and a top wall. A container supporting pedestal having a needle projecting upwardly therefrom is positioned within the contain... | 05/25/1976 |
| 3951185 | Hydrostatic tester for fire extinguisher The specification discloses a closed system for cleaning, pressure testing, and drying fire extinguisher containers. The system comprises two tanks for holding trichloroethane and flow lines and a valve control system for flowing the liquid from one tank ... | 04/20/1976 |
| 3949598 | Method and means for indicating a leakage through the wall of a vessel Leakage through a fraction of the wall of a vessel is indicated by delimiting, at one side of the wall fraction, a narrow closed space connected to pressure measuring means, whereupon both sides of the wall of the vessel, except the area enclosed in the n... | 04/13/1976 |
| 3939383 | Liquid level monitoring device A liquid level monitoring device operable either to detect leakage from a body of liquid or to detect deviations from a controlled rate of withdrawal from a body of liquid. The device employs a pressure responsive diaphragm which, in the face of unequaliz... | 02/17/1976 |
| 3931731 | Flux meter A comparison-type flux meter for works such as nozzles or the like has an output elimination circuit in co-operation with a DC amplifier receiving output of a differential pressure transducer inserted in the main pipe line. Measurement error is minimized ... | 01/13/1976 |
| 3930401 | Container and leak-testing system therefor A system for testing opening-equipped containers for leakage during the entire period, which is usually relatively long, between the time that such containers are fabricated by the manufacturer thereof and the time that they are filled by the user with th... | 01/06/1976 |
