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US 5,632,391 AGranted
Weight for a lift-limiting switch
AssigneeKidde Industries, Inc.
InventorGerd Erdmann
Life of this patent
Estimating the term…
Abstract
A weight for operating the lift-limiting switch of a crane, especially a telescoping-boom crane, is composed of two identical castings connected together by a hinge at one side and having a lock on the opposite side which, when actuated, holds the two members around the crane cable but which can be opened to allow the weight to be placed over the cable or to be removed therefrom.
Claims12
A weight for a lift-limiting switch of a crane having a cable adapted to lift a load, said weight comprising:
- two identically cast members of generally U-shaped cross section, each of said members being formed with a channel and having side formations flanking the respective channel;
- means forming a hinge between side formations of said members, thereby enabling said members to be fitted around said cable and to receive said cable with clearance in said channels;
- and
- lock means on said members selectively operable to retain said members in a closed position enclosing said cable and enabling said members to be swung about said hinge into an open position for enabling said weight to be placed on and removed from said cable.
1 more element
A telescoping crane, comprising:
- a boom having a boom head;
- a cable depending from said boom head and raisable and lowerable therefrom;
- tackle on said cable for engaging said cable with a load;
- a lift-limiting switch actuatable to terminate raising of said tackle;
- a weight surrounding said cable, said weight including,
- two identically cast members of generally U-shaped cross section, each of said members being formed with a channel and having side formations flanking the respective channel,
- means forming a hinge between side formations of said members, thereby enabling said members to be fitted around said cable and to receive said cable with clearance in said channels, and
- lock means on said members selectively operable to retain said members in a closed position enclosing said cable and enabling said members to be swung about said hinge into an open position for enabling said weight to be placed on and removed from said cable;
- and
- a flexible member anchored to said weight and to said head for suspending said weight from said head such that upon upward contact between said weight and said switch caused by said tackle, said weight actuates said switch.
7 more elements
Dependencies are inferred from the claim text.