TREE BUNDLE GRAB Russian patent published in 2005 - IPC

FIELD: materials handling facilities; tractor grabs.

SUBSTANCE: proposed device has housing with hydraulically-operated curvilinear jaws made with radius in middle part and hinge-mounted in housing to form working circuit. Upper parts of jaws are formed by parallel planes passing through axes of their rotation. Radius in middle part of each jaw corresponds to half of jaws axis-to-axis distance. Lower parts of jaws and housing are made to form two pairs of planes arranged at angle not exceeding 90°, their vertices being displaced from center of working circuit. Height of working circuit is 1.5R where R is said radius of middle part of each jaw. Housing is furnished with distributing unit and two hydraulic cylinders hinge-connected with housing and jaws.

EFFECT: improved reliability of gripping of three bundless at logging.

4 cl, 2 dwg