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 |
| 7005620 | Piston and method of manufacture A piston particularly adapted for heavy-duty diesel engine applications is fabricated from separate parts having circumferentially extending joining surfaces that are heated prior to bonding to an elevated temperature sufficient to enable bonding of the joining surf... | 02/28/2006 |
| 6260472 | One-piece integral skirt piston and method of making the same A one-piece piston (20) formed by an upper crown (28) and a lower crown (30) having an integral skirt (24, 26). The upper crown (28) includes an upper surface (32) and a lower surface (34, 42). The lower crown (30) includes an upper surface (50) and two p... | 07/17/2001 |
| 6240828 | Piston of internal combustion engine A piston of an internal combustion engine, comprises a skirt portion in sliding-contact with a cylinder wall, an inner crown-plus-boss portion having a crown portion and piston-pin boss portions, and a stay portion interconnecting the skirt portion and th... | 06/05/2001 |
| 4802382 | Connecting rod assemblies intended for the reciprocating driving of a piston inside a cylinder A connecting rod for reciprocally driving a piston within a cylinder wherein the piston rod includes upper and lower portions which are connected by an area of thinner dimension which is also yieldable so as to permit the lower end of the connecting rod t... | 02/07/1989 |
| 4774917 | Piston and piston ring for an internal combustion engine An internal combustion engine includes a cylinder block, a piston and a piston ring. The cylinder block includes at least one cylinder bore which includes a cylinder bore surface. The piston is located within the cylinder bore of the cylinder block so as ... | 10/04/1988 |
| 4736676 | Composite piston A composite piston structure is disclosed which provides a simple and reliable means for joining a carbon-carbon or ceramic piston cap 11 with a metallic piston body 13. Attachment is achieved by means of a special geometry which compensates for differenc... | 04/12/1988 |
| 4683810 | Two-stage composite piston A metal and plastic two-stage composite piston including an annular metal cup, a hollow plastic annular core bonded about the periphery of the cup, a plastic high pressure piston bonded to the interior of the cup, and a plastic low pressure piston bonded ... | 08/04/1987 |
| 4409947 | Exhaust gas recirculating type diesel engine An exhaust gas recirculating type diesel engine wherein part of the exhaust gas is recirculated from its exhaust system to its intake system. An annular groove is formed on the circumferential surface of the piston, and a ring for preventing small particl... | 10/18/1983 |
| 4282837 | Two-cycle diesel engine with piston ring stabilizing accumulator volume A two-stroke cycle diesel engine having ported cylinders is provided with a piston having an accumulator volume between the two top piston rings, the volume being sized large enough in relation to the piston ring leakage area and operating conditions to l... | 08/11/1981 |
