Brushing – scrubbing – and general cleaning – Machines – Brushing
Patent
1979-03-12
1980-05-27
Roberts, Edward L.
Brushing, scrubbing, and general cleaning
Machines
Brushing
192 46, E01H 104, F16D 1104
Patent
active
042042933
ABSTRACT:
A differential unit provides for relative movement between two drive wheels on a lawn sweeper or other implement powered by movement along the ground and includes a shaft and a pair of gears positioned transversely with respect to the shaft. A ratchet crown wheel is provided on one of the major faces of each gear and has camming surfaces for producing axial movement of the gears on the shaft, with each camming surface terminating in an axial surface. Axial movement is accommodated by a resilient member such as a coil spring. A roll pin projects outwardly from the shaft and engages an axial surface to drive the shaft, and is adapted to engage the camming surfaces to move the gear axially. The shaft is driven by the faster rotating gear, and difference in speeds of rotation of the gears produces a relative rotation of the shaft with respect to the slower rotating gear and produces axial movement of the slower gear with respect to the shaft.
REFERENCES:
patent: 336728 (1886-02-01), Mack
patent: 604812 (1898-05-01), Walton
patent: 907755 (1908-12-01), Despain
patent: 1984966 (1934-12-01), Dohm
patent: 2561136 (1951-07-01), Richardson
patent: 4042994 (1977-08-01), Sassaman
J. I. Case Company
Roberts Edward L.
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