Did You Know...
...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 4133460 | Apparatus embodying explosively removable sleeve A housing for an elongated opening such as a cylindrical passage which has a portion subject to severe conditions such as abrasion, heat, pressure, wear or corrosion which tend to deteriorate the wall of said opening, has a replaceable sleeve in the openi... | 01/09/1979 |
| 4094558 | Locking nut assembly with deformable locking sleeve A self contained nut assembly to allow self nut locking and unlocking for use with a support member. The nut assembly comprises an upper nut containing a pronged locking sleeve. The nut and locking sleeve fit onto a threaded element projecting through a s... | 06/13/1978 |
| 4054341 | Adjustable low friction bearing A bearing and clamping bushing is integrally formed with end rings and a central section which changes diameter when the end rings are clamped together. Annular grooves separate the central section from the end rings and form flexible bridges. Axially ext... | 10/18/1977 |
| 3961104 | Internal cylindrical bearing surfaces A method of producing a hard wearing bearing surface on a component such as a cylinder or cylinder liner, by pressing an accurately screened hard powder in liquid medium into engagement with the surface and on a helical path, the pressure and powder size ... | 06/01/1976 |
