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.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 5992229 | Method and equipment for determining the performance of control valve A method for determining the performance of a control valve in a closed control loop by using a simulation model. A simulation model of a process control loop is provided, consisting of a unit process (2) including the flow equations of the valve, a proce... | 11/30/1999 |
| 5965816 | Computer program, system and method to specify random vibration tests for product durability validation An application program and computer system for determining the testing profile for accelerated laboratory random vibrational testing of a product, including the application program steps of (i) selecting the frequency range covered in the laboratory accel... | 10/12/1999 |
| 5950144 | Method for data transfer in vehicle electrical test system A system for testing the electrical components of vehicles during manufacturing includes a hand held tester to which a translator unit can be detachably engaged and with which the tester is in RF communication. The translator unit can be detached from the... | 09/07/1999 |
| 5937373 | Method of controlling an underground fluid flow system A method of operating a municipal water system employs a master computer having a memory which retains information regarding all the valves in the system. One assigned to exercise certain valves in the system obtains a print out of current information reg... | 08/10/1999 |
| 5926774 | Test system for testing the quality of semiconductor parts and handling the collection of operation status data on the tester and handlers A test system testing whether test objects, such as semiconductor parts, are good or bad collects operation status data to increase the operation rate of the tester testing the test objects and the handlers handling the test objects. The relay device to w... | 07/20/1999 |
| 5884237 | Automatic door system with self-diagnosing function An automatic door system includes a door which id driven to open and close by a motor. A sensor senses an object which approaches or leaves the door. A control section controls the motor in accordance with a signal supplied from the sensor. The control se... | 03/16/1999 |
| 5870699 | Hand held data collector and analyzer system A hand held data collector and analyzer achieves superior stability, accuracy and reliability through the use of a fixed frequency anti-aliasing filter and two analog to digital converters, one for high frequency signals and one for low frequency signals.... | 02/09/1999 |
| 5841031 | Method and apparatus for evaluation and inspection of composite-repaired structures A method and apparatus for evaluation and inspection of a composite-repaired structure generates a frequency-varying electrical signal to test and evaluate the composite-repaired area. The electrical signal is converted into a mechanical signal and transm... | 11/24/1998 |
| 5804726 | Acoustic signature analysis for a noisy enviroment A device for testing mechanical devices using acoustic signature analysis of the sonic signature of such devices by filtering out the frequencies of interest, recreating such frequencies from their respective harmonics, and then correlating the recreated ... | 09/08/1998 |
| 5793649 | Apparatus for measuring the operation of vehicular engines The operation of a machine, varying with time, is sensed and the signals fed to a micro-computer for processing. The processed signals are stored, varying with time. The stored signals are transmitted to an external computer having display means to displa... | 08/11/1998 |
| 5767406 | Method to specify random vibration tests for product durability validation A method for determining the testing profile for accelerated laboratory random vibrational testing of a product, including the steps of (i) selecting the frequency range covered in the laboratory accelerated testing, (ii) developing a simplified composite... | 06/16/1998 |
| 5745390 | Method and system for reducing development time of complex systems utilizing correlation matrices A method and system for reducing development time of a complex system such as an automobile engine utilizing correlation matrices are provided. First, second and tertiary level correlation matrices are preferably created and stored on a computer system in... | 04/28/1998 |
| 5721789 | Method for testing elastic properties of a dressing on a printing cylinder The object of the invention is attained in a manner where is at least one image pickup device is provided for picking up image signals obtained from at least one surface of a printed image, and a steering and control device connected to the pickup device ... | 02/24/1998 |
| 5699274 | Panel performance test system The invention is a performance testing system, i.e., performance of a material under a load concentrated in a single area. The system is computerized and automatically applies a load to a panel to be tested, reads and records deflection of the panel witho... | 12/16/1997 |
| 5675505 | Sine on random data analysis method for simulating engine vibration A computer-implemented apparatus and method for operating vibrational testing equipment which conducts vibrational testing upon automobile components. Raw engine acceleration data is gathered from a running car so that a sine on random calculation may be ... | 10/07/1997 |
| 5661659 | Instrumentation power supply and read unit for testing gearboxes through various speeds and gears An electronic board for cooperation with a computer and a group of noise measuring instruments, for displaying side by side noise curves for various gear pairs of a gearbox for differing frequencies selected by filter means (15,21,20,17,19,18,23) in an au... | 08/26/1997 |
| 5587925 | File testing techniques A method of testing the characteristics of a file by providing a curve of the amount of material removed from a test bar as a function of the effective stroke area over which the file has been moved, the slope at a specified value of material that has bee... | 12/24/1996 |
| 5583797 | Method and apparatus for wheel alignment audit A method and apparatus for auditing motor vehicle wheel alignment includes a sensor for passively detecting physical cartesian relationships of at least one wheel on each motor vehicle, and a test station positioned for serially addressing each of the plu... | 12/10/1996 |
| 5574668 | Apparatus and method for measuring ball grid arrays An array of touch sensors are brought in contact with a ball grid array. A linear actuator moves the array of touch sensors. The position of the linear actuator is known very precisely. As the touch sensors encounter the ball grid array, they provide a si... | 11/12/1996 |
| 5541855 | Device for testing unset concrete and mortar A rotating testing device can be connected to a base unit. A temperature sensor can also be connected to the base unit. The testing device has probe heads. The probe heads are immersed and rotated in the liquid concrete and the force required for rotation... | 07/30/1996 |
| 5515295 | Methods and systems for fluid identification and flow rate determination Methods and systems for determining the identity and flow rate of a fluid are provided. Linearized output signals are provided. To determine fluid flow, a test fluid is passed through a conduit. A heater associated with the conduit is maintained a tempera... | 05/07/1996 |
| 5515294 | Method and apparatus for testing coiled materials A curved sample of material is tested for ultimate tensile stress and elongation without prestraightening or premarking of the length of the sample. The sample is gripped at its ends and positioned to extend over convex surfaces mounted adjacent to the gr... | 05/07/1996 |
| 5477244 | Testing method and apparatus for judging a printing device on the basis of a test pattern recorded on a recording medium by the printing device A table having a plurality of holding portions for holding recording heads to be tested is arranged to be pivotal between a printing position and a changing position, so that the recording head located at the changing position can be changed during estima... | 12/19/1995 |
| 5223207 | Expert system for online surveillance of nuclear reactor coolant pumps An expert system for online surveillance of nuclear reactor coolant pumps. This system provides a means for early detection of pump or sensor degradation. Degradation is determined through the use of a statistical analysis technique, sequential probabilit... | 06/29/1993 |
| 5198980 | Portable testing apparatus for airplane engines A self-powered and self-contained portable testing apparatus for monitoring critical operating parameters of an aircraft reciprocating engine. The portable testing apparatus is typically used for the running-in of aircraft engines after overhaul, before r... | 03/30/1993 |
| 5140858 | Method for predicting destruction of a bearing utilizing a rolling-fatigue-related frequency range of AE signals A method for predicting destruction of a bearing preliminarily finds frequency range of acoustic emission signals indicating fatigue of bearings. In order to find the fatigue-related frequency range, frequency components of electrical noise, mechanical no... | 08/25/1992 |
| 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 |
| 5055825 | Method and circuit for self-checking troubles of a heating system A method and circuit for self-checking problems in a heating system for an automobile are disclosed. A self-checking and indicating process are disclosed which include a first preheating step; an ignition period; a second preheating step; a combustion per... | 10/08/1991 |
| 4926330 | Diagnosis system for a motor vehicle A system for diagnosing a motor vehicle has a diagnosis device including a computer having a central processing unit and a memory, the memory having a plurality of programs for diagnosing an electronic control system for controlling an engine. Terminals a... | 05/15/1990 |
| 4894782 | Diagnostic system for determining engine start bleed strap failure A novel diagnostic system used in conjunction with an engine electronic control automatically determines start bleed strap failure in a gas turbine engine. The system indirectly determines engine start bleed strap failure without a separate sensor. A norm... | 01/16/1990 |
| 4517821 | Automatic torque wrench tester An automatic torque wrench testing machine uses a strain-gauge transducer to develop signals corresponding to the torque applied to the wrench. The machine is driven by pneumatic/hydraulic drive under the control of a microprocessor. Torque is initially a... | 05/21/1985 |
| 4499540 | Device for the testing of bodies comprising periodic structures The invention relates to a device for testing a body which comprises periodic structures. The device includes an image forming device for determining measurement signals representing the periodic structures, and a further electronic device. This electroni... | 02/12/1985 |
| 4476531 | Engine analyzer with digital waveform display An engine analyzer for an internal combustion engine includes an analog-to-digital (A/D) converter which digitizes an analog electrical input waveform representing, for example, a secondary or primary voltage waveform of the ignition coil of the internal ... | 10/09/1984 |
| 4336711 | Gear mesh testing instruments The present invention relates to a gear mesh testing instrument in which the transmission error occurring between the two gears to be tested (the driving gear and the driven gear) is measured while both gears are rotating while intermeshed with each other... | 06/29/1982 |
| 4283955 | Method of and measuring apparatus for determining the standard tensile yield point under load conditions A method of and apparatus for the determination of the standard tensile yield point in which the extension of a test body is monitored, comprises determining in the course of continuous extension within the elastic limit, the ratio of the instantaneous ex... | 08/18/1981 |
| 4255788 | Phasing detector for continuous flow systems A phasing system is provided for parallel channel continuous flow systems wherein the individual test channels have different flow times although intersample timing is constant. A phasing sample is introduced and its presence is sensed at the output of ea... | 03/10/1981 |
| 4213346 | Method and apparatus for testing cyclically operated mechanical members for defects A method for testing cyclically operated mechanical members for defects comprises the steps as follows: a frequency range of at least two wideband electrical signals corresponding to the defects of the test member is selected; the modulus and phase of the... | 07/22/1980 |
| 4204425 | Method of testing induction motors A method is provided for testing induction motors, particularly single-phase fractional horsepower motors, which enables routine testing of all motors in production for both starting and running torque and other desired characteristics. The method consist... | 05/27/1980 |
| 4181029 | Multi-axis, complex mode pneumatically actuated annular frame shaker for quasi-random pneumatic vibration facility Pneumatically driven vibrators coupled to resonating, self-attenuating structures define a shaker which, when included in a vibration system, enables a test item to be vibration tested under controlled conditions of multi-frequency, multi-degree-of-freedo... | 01/01/1980 |
| 4027532 | Compression testing apparatus The disclosure describes apparatus for determining the relative compression of the chambers of an internal combustion engine by analyzing the voltage or current waveform of the starter system during cranking. The waveform is rapidly and repetitively sampl... | 06/07/1977 |
