Land vehicles – Wheeled – Articulated vehicle
Patent
1979-07-18
1980-12-30
Silverstrim, John P.
Land vehicles
Wheeled
Articulated vehicle
172272, 172439, 280504, B60D 112
Patent
active
042419352
ABSTRACT:
A three-point tractor hitch system includes a coupling hook structure as the upper link thereof formed with a hook body defining a concave recess for receiving therein in locking engagement a coupling sphere. A locking bolt received within a rectilinear opening extends into the concave recess of the hook body with a curved locking surface adapted to engage the contour of the coupling sphere. The locking bolt is pivotally mounted at its opposite end to a control lever having a generally U-shaped recess formed therein to engage a bearing pin mounted on the hook body. The U-shaped recess has lateral sides arranged so that imaginary extensions thereof will intersect the axis of the locking bolt and bearing means are interposed between the control lever and the hook body on a side of the pivotal coupling of the locking bolt to the hook body opposite the side on which the U-shaped recess is formed. A bearing pin is located on the hook body to be engaged within the U-shaped recess of the control lever when the locking bolt extends into its locking position within the concave recess.
REFERENCES:
patent: 3361447 (1968-01-01), Engelmann
patent: 3384937 (1968-05-01), Muncke et al.
patent: 3544133 (1970-12-01), Lemmon et al.
Muller Norbert
Vollmer Jurgen
Jean Walterscheid GmbH
McGiehan Donn
Silverstrim John P.
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