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 |
| 7076854 | Method for the production of a shaft-hub connection A toothed or splined shaft having an external toothing is pushed with clearance into an internal toothing of a hub, tooth to space, and the external toothing of the shaft is pressed together with the internal toothing of the hub. In the push-in position of the shaft... | 07/18/2006 |
| 4890992 | Screw-rotor machine with an ellipse as a part of its male rotor A screw-rotor machine with two meshing rotors provides with helical lands and intervening grooves and adapted for rotation around parallel axes in a working space in the machine, characterized in that; the profile of rotors uses ellipse as a basic geometr... | 01/02/1990 |
| 4401420 | Male and female screw rotor assembly with specific tooth flanks An oil-cooled type screw rotor assembly having a female rotor and a male rotor adapted to rotate around parallel axes in meshing relation to each other. The leading side flank of the female rotor is constituted by a first leading side flank formed by an a... | 08/30/1983 |
| 4369668 | Axial thrust compensation system An axial thrust compensation system in high speed helical gear engagement includes a thrust collar fixed to a shaft which carries a gear. The collar includes a peripheral groove. Another gear carrying shaft includes a disc element which engages the thrust... | 01/25/1983 |
| 4350480 | Intermeshing screw rotor machine with specific thread profile The threads of the gate rotor of a screw rotor machine are generated by a rounded crest portion of the main rotor thread so that the flanks of the gate rotor threads will have a contour tangent to a plurality of circles which have progressively decreasing... | 09/21/1982 |
| 4294132 | Cylindrical gear with helical teeth A cylindrical gear wheel having helical teeth with different pitch diameters for the left hand and right hand sides of the teeth and convergent line of teeth in which one side of the teeth are characterized by positive values of addendum modification whil... | 10/13/1981 |
| 4292857 | Cylindrical gear with helical tooth wheels A cylindrical gear train comprising first and second gears having helical eth of different thickness with different pitch diameters for the left hand and right hand sides of the teeth and with different nominal angles of inclination and different mesh cor... | 10/06/1981 |
