Machine element or mechanism – Gearing – Reversal of direction of power flow changes power...
Patent
1994-07-11
1996-09-24
Marmor, Charles A.
Machine element or mechanism
Gearing
Reversal of direction of power flow changes power...
192 36, F16H 308, F16D 1310
Patent
active
055579876
ABSTRACT:
Shifting device for a turning gear transmission having an automatic change of transmission ratio when a change in direction of a driving shaft occurs, including two driving gearwheels disposed coaxially with respect to the driving shaft, the driving gearwheels being of different diameters and, respectively, being disconnectable from the driving shaft, and a driven shaft having two driven gearwheels firmly connected thereto and being in continuous pair-wise engagement with the driving gearwheels, further includes a pawl holder rotatably mounted on the driving shaft, the driving gearwheels being rotatably mounted on the pawl holder, at least one pair of pawls held by the pawl holder, and a device for causing the pair of pawls, contingent upon the respective direction of rotation of the driving shaft, to effect an entrainment of one of the driving gearwheels in a different direction of rotation.
REFERENCES:
patent: 102697 (1870-05-01), Morton
patent: 1563742 (1925-12-01), Hansen
patent: 2903901 (1959-09-01), MacDonald
patent: 4352979 (1982-10-01), Knecht
Greenberg Laurence A.
Heidelberger Druckmaschinen AG
Jensen Nathan O.
Lerner Herbert L.
Marmor Charles A.
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