Title: Hydraulic load sensing device

Abstract: A hydraulic load-sensing device disposed between a load carrying device in the form of a lifting hook and a hoist in the form of a crane jib includes a single-acting hydraulic piston and cylinder unit, the cylinder component being connected to the hoist jib and the piston component being connected to the lifting hook in such manner that as the hoist jib is raised in order to raise the load carried by the hook, a corresponding pressure is exerted on the hydraulic medium between the piston and the lower end of the cylinder and this pressure is transmitted from the cylinder through a line to a pressure gage which measures and exhibits the combined dead weight of the hook and its load.

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Inventors: Karlsson, Einar (Burtrask, SW)

Application Number: 487162
Filing Date: 1974-07-10
Publication_date: 1976-02-17
Assignee:
Primary Class(es): 73/862.56 73/862.584, 177/208
Other Classes:
US Patent Ref:

669391	Mar, 1901	Hillenbrand	73/392.
1997864	Apr, 1935	Hill	177/147.
2620177	Dec, 1952	Wise	177/208.
2851171	Sep, 1958	Martin et al.	177/147.
3074272	Jan, 1963	Melton et al.	73/141.
3376739	Apr, 1968	Thornton	73/141.
3752245	Aug, 1973	Johnson	177/208.

Other Refs:
Primary Examiner: Ruehl, Charles A.
Assistant Examiner:
Attorney: Pierce, Scheffler & Parker