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Application filed by Національний Аграрний Університет, Национальный Аграрный УниверситетfiledCriticalНаціональний Аграрний Університет
Priority to UA2002064981ApriorityCriticalpatent/UA54231C2/en
Publication of UA54231C2publicationCriticalpatent/UA54231C2/en
A clamshell for timber, in particular of round shape, contains a traverse with rods, a working hydraulic cylinder, two jaws, each of which consists of two hingedly connected parts. The connection of two parts of jaws is effected by means of hydraulic servo-control device with a set of safety and actuator valves connected in parallel to the basic working cylinder. Therefore the front sections of jaws can turn depending on the drag of the recess of jaws into the pile of timber. Invention allows stabilizing the trajectory of motion of the jaws of clamshell, reducing power consumption of technological process and output of hoisting machines.
UA2002064981A2002-06-172002-06-17clamshell for timber
UA54231C2
(en)