Load gripping clamp e.g. forest clamp, for seizure and transporting e.g. tree trunk, has free space closure or reduction units passed between two positions in presence of load to adjust free space dimensions based on load characteristics

摘要

The clamp (1) has a free space closure or reduction units (6) occupying two positions such as less encumbrance position in free space (5) and larger encumbrance position in the free space. The closure or reduction units are equipped with spring-type elastic units (8) solicitation in the larger encumbrance position. The closure or reduction units are passed from the larger encumbrance position to the less encumbrance position in the presence of load that acts against the elastic units to adjust the dimensions of the free space depending on characteristics of the load seized by the clamp.