Bizarre Patents
A new toilet tank assembly aquarium for housing aquatic creatures.
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 |
| 5056231 | Apparatus for locking wheel unit in automotive wheel alignment system In an automotive vehicle wheel alignment system, a rim clamp is attached onto the rim of a wheel and a head unit is connected to the rim clamp. The rim clamp includes a spindle having circumferential grooves. The head unit includes a spindle-receiving sle... | 10/15/1991 |
| 5046032 | Calibration bar A cross toe zero calibration system for use in an automotive vehicle wheel alignment system uses a calibration bar for receiving cross toe measuring head units. A first set of cross toe measurements are taken with the bar in a first position and a second ... | 09/03/1991 |
| 5014227 | Caster and steering axis inclination measurement technique A wheel alignment system measures caster and steering axis inclination (SAI) by positioning the wheels at a right turn position and a left turn position. Toe, camber and inclination angle measurements are made for both wheels at both the left turn positio... | 05/07/1991 |
| 4594789 | Wheel alignment system A wheel alignment system uses head units attached to each of the four wheels. The front head units contain photodetector arrays which view across the front of the vehicle and to the rear. The rear units carry photodetector arrays which look forward. Each ... | 06/17/1986 |
| 4502324 | Engine analyzer power check apparatus An engine analyzer tests operation of a multicylinder internal combustion engine by disabling selected cylinders. The apparatus includes a semiconductor switch connected in parallel with the ignition points (or solid state circuit interrupter) of the engi... | 03/05/1985 |
| 4490799 | Ignition coil test apparatus An ignition analyzer apparatus tests the condition of the ignition coil of an internal combustion engine. A gating pulse is supplied to a test circuit immediately before the points are to open for a selected cylinder which causes the test circuit to provi... | 12/25/1984 |
| 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 |
| 4472779 | Engine timing apparatus for use in testing Engine timing apparatus includes a timing light, cylinder clock signal circuitry, a cylinder counter, a cylinder comparator, first, second and third timers, a trigger pulse generator, operator control buttons, and a computer. The first timer measures a fi... | 09/18/1984 |
| 4467323 | Engine analyzer with simulated analog meter display An engine analyzer for an internal combustion engine includes circuitry, under the control of a microprocessor, which senses parameters of operation of the internal combustion engine and supplies digital signals indicative of those sensed parameters. A ra... | 08/21/1984 |
| 4425791 | Computer based engine analyzer with hardware cylinder counter An engine analyzer performs electrical tests on a multi-cylinder internal combustion engine under the control of the digital computer. The engine analyzer includes a hardware cylinder counter which keeps track of the current cylinder number while various ... | 01/17/1984 |
| 4423378 | Automotive battery test apparatus The condition of a storage battery of an internal combustion engine powered vehicle is tested automatically, and an indication of battery condition is provided to the service technician. The battery testing apparatus is connected to the positive (+) and n... | 12/27/1983 |
| 4399407 | Engine analyzer with constant width 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 ... | 08/16/1983 |
