Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 7362000 | Fluid pulsating generator A fluid pulsating generator utilizes a repeating pulsating component in conjunction with one or more piezoelectric members to generate a piezoelectric affect which creates an electrical voltage. The fluid pulsating generator can be incorporated into a pulsating spri... | 04/22/2008 |
| 7347087 | Engine oil leak test system and method A system and method for testing partially assembled engines for possible oil leaks. The system includes engine pressurizing devices that are automatically controlled by a controller according to a predetermined control program based upon the engine model type being ... | 03/25/2008 |
| 7278294 | System and method for determining atomization characteristics of spray liquids A system and method for determining the atomization characteristics of fluids being emitted by a nozzle is disclosed. In one embodiment, a fluid is emitted through a nozzle while simultaneously sensing vibrations occurring within the nozzle. The vibrations provide i... | 10/09/2007 |
| 7185535 | Tire sensor interrogation and valve therefore A system for interrogating a tire sensor. The disclosure provides a wheel (2) including a sensor (14) and an electrical conductor (18, 20) extending about a rotational axis (4) of the wheel (2), the sensor (14) being electri... | 03/06/2007 |
| 7060216 | Tire pressure sensors and methods of making the same The elements of a tire pressure monitoring and transmitting system are encapsulated into a single package. A pressure sensitive device is covered with a flexible gel coat and then inserted into a molding tool cavity. A removable pin is incorporated into the molding ... | 06/13/2006 |
| 6999000 | Transponder-based microwave telemetry apparatus A transponder-based microwave telemetry apparatus for moving machinery includes a microwave transmitter disposed outside the moving machinery to fill a chamber of the moving machinery with microwave energy. The transponder-based microwave telemetry apparatus also in... | 02/14/2006 |
| 6543277 | Non-attached monitoring assembly for pneumatic tire A monitoring assembly for a pneumatic tire includes an electronic monitoring device having at least one sensor disposed in a protective body. The monitoring assembly may be configured to float on a variety of liquids that are typically disposed within a t... | 04/08/2003 |
| 6318147 | Wear monitor A wear monitor suitable in particular for monitoring the wear and tear of rider rings (7) on the pistons (5) of horizontally operating reciprocating compressors presents a sensor (9) that monitors the thickness of the rider ring (7) at least indirectly, i... | 11/20/2001 |
| 6196063 | Method and apparatus for measuring piston ring tension An apparatus for measuring tension of piston rings includes a cylindrical support fixture having a circumferential groove formed therearound for receiving and holding a piston ring. A rigid base supports a plurality of components of the apparatus. A stron... | 03/06/2001 |
| 6155109 | System and method for measuring piston ring rotation A system and method for measuring end gap position and rotation of rings on a piston reciprocating in an engine cylinder. Eddy current induction detectors are installed in ports extending through the cylinder wall spaced around the circumference. Signals ... | 12/05/2000 |
| 6050135 | Spark plug port compression cap The disclosed invention is an inexpensive, simple and reusable device to aid in setting the spark plug timing of an internal combustion engine by allowing one person to detect a piston's top dead center. In function, the detector is sealably inserted into... | 04/18/2000 |
| 5974871 | Tension measuring apparatus and method for piston ring An impact and a vibration are applied to a portion of a piston ring on which a belt body is wound, and a vibration is also applied to the belt body. A position where a desired tension can be obtained is obtained by using a master gauge having an outer dia... | 11/02/1999 |
| 5633459 | Method and apparatus for testing piston rings Piston rings are tested for their effectiveness by removing the cylinder heads of an engine, and sealing one cylinder with a pressure cap. Fluid under pressure is admitted into the cylinder, and time required to dissipate the pressure is monitored. A long... | 05/27/1997 |
| 5578750 | Sensor for magnetically scanning a moving element in an internal combustion engine A sensor has a magnetic circuit and an electric circuit for scanning the passage of magnetizable and non-magnetizable material of relatively movable parts. The sensor has a housing made of first and second parts which define an interface between them. The... | 11/26/1996 |
| 5258930 | Piston ring wear diagnostic device and procedure therefor A device for diagnosing wear on the sliding surface of a piston ring (07a) on a piston (01) which is reciprocating inside a cylinder (02), as applied in diesel engines and compressors, etc. A through-hole (103) is bored in the cylinder wall (02) to extend... | 11/02/1993 |
| 5007284 | Piston ring and liner wear simulator and method of using same A new bench tester for laboratory simulation of piston ring and cylinder wear according to the invention includes tests made using liner segments which bear against a reciprocating piston ring. Temperatures up to 550° C. and loads and speeds representati... | 04/16/1991 |
| 4987774 | Apparatus for measuring the thickness of piston rider rings An apparatus for measuring the thickness of piston rider rings includes a probe disposed in the vicinity of the piston rod of a piston in a horizontal reciprocating machine to determine the vertical distance between the probe and the rod. Changes in the v... | 01/29/1991 |
| 4854162 | Method of locating friction generating defects in a multiple bearing assembly A method of determining the location and type of dimensional defects, particularly friction generating defects, which comprises: (a) initiating simulated operation at ambient conditions of an assembly having certain sliding or rolling contact surfaces; (b... | 08/08/1989 |
| 4520660 | Engine testing apparatus and methods An engine timing apparatus comprises an ultrasonic transducer 8 which directs a pulsed ultrasonic beam into a cylinder and converts the reflected ultrasonic signals into electrical signals. A sample/hold circuit 67 samples this signal at a time after each... | 06/04/1985 |
| 4468956 | Method and apparatus for utilizing microwaves for internal combustion engine diagnostics A method and apparatus is disclosed for determining various diagnostic conditions of an internal combustion engine from an analysis of the resonances of a reflected microwave signal radiated into a combustion chamber of the internal combustion engine. Var... | 09/04/1984 |
| 4444049 | Engine testing apparatus and methods An engine timing apparatus comprises an ultrasonic transducer 8 which directs a pulsed ultrasonic beam into a cylinder and converts the reflected ultrasonic signals into electrical signals. A sample/hold circuit 67 samples this signal at a time after each... | 04/24/1984 |
| 4375761 | Monitoring internal combustion engines A method of monitoring the wear of relatively moving parts, particularly inaccessible moving parts of internal combustion engines, comprises fixing a length of radioactive material into the part to be monitored, so that one end of the material is flush wi... | 03/08/1983 |
| 4249415 | Apparatus for measurement of compressive loads Apparatus is disclosed for measuring compressive loads and more specifically for measuring the "diametral load to close", of a gapped piston ring or sealing ring. The ring is mounted in a vertical plane so that the diameter through its gap is substantiall... | 02/10/1981 |
| 4143319 | Method for magnetically determining the degree of wear of a piston ring of an internal combustion engine while reciprocating thereon A method for determining the degree of the wear condition of a piston ring in sliding contact with a cylinder wall of an internal combustion engine. The piston ring has a defined magnetic property which property in sliding contact with the wall may be var... | 03/06/1979 |
| 3946602 | Piston ring tension gage A piston ring tension gage consisting of a ring compression test fixture provided with a digital strain readout indicating for automatically determining the pressure exerted by a piston ring assembly in a simulated operative use position. The ring compres... | 03/30/1976 |
