Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 7300417 | Syringe/plunger coupling A medical fluid injector, replaceable syringe, and coupling mechanism to engage the syringe plunger to the plunger drive ram of the injector are provided wherein coupling involves a cam cleat-like mechanism, thereby allowing for cooperative movement between the plun... | 11/27/2007 |
| 7258060 | Piston and scraper assembly A piston and scraper assembly (26) for a high-pressure liquid chromatography column (1) is provided with a snap lock between the piston (5) and the scraper (25). The snap lock comprises a groove (23) in the piston wall (17),... | 08/21/2007 |
| 7028569 | Piston, in particular for sampling valve The invention concerns a piston wherein the mobile screw (2) is engaged in the bolt (8) integral with the mobile assembly (1). It is provided with a cylindrical axial housing (10) wherein is engaged the rod (7) integral at its fron... | 04/18/2006 |
| 6976389 | Method for setting the nozzle opening pressure for an injection nozzle and arrangement for carrying out the method In order to set the nozzle opening pressure for an injection nozzle, in particular for a diesel injection nozzle, to an accuracy of around ±1%, the method provides that the injection needle is first pressed against the valve seat with a closing force (Fz), and then... | 12/20/2005 |
| 4741462 | Adjustable piston packing expander for caulking guns An adjustable piston packing expander for use with conventional caulking gun piston assemblies is disclosed. The packing expander threads onto the piston rod and includes a frusto-conical expansion surface which contacts the inner surface of the packing w... | 05/03/1988 |
| 4158328 | Piston with variable side clearance A piston having a floating wedge carried in a recess of the skirt for limited axial movement. Reciprocation of the piston shifts the wedge position between upper and lower extremes, reducing the effective piston clearance in its cylinder during the upper ... | 06/19/1979 |
