US 9,725,284 B2Granted

Remote sling release for crane

OwnerPaul Desaulniersinventor

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Abstract

An improved remote sling release for a crane has a main plate member including an access hole for attaching a main crane hoisting line therethrough, a hook portion located at an opposite end from the access hole and adapted to selectively hold securely or release sling members thereon. Two sling ejector plate members connected to one another such that the ejector plate members are pivotally attached to the main plate member, wherein each of the sling ejector plate member has a sling notch therein adapted to receive the sling members of a hoist pallet therein. A sling access handle member attached to at least one of the sling ejector plate members and used to manually rotate the ejector plate members from an open position for receiving the sling members therein and into a closed position, wherein the sling member are locked upon the hook portion of the main plate member. A remotely controlled solenoid mechanism attached to the main plate member and adapted to unlock the locking mechanism, and a first traction spring member adapted to bias the ejector plate members into the open position and force the sling members off of the hook portion. A remote control mechanism adapted to remotely activate the solenoid mechanism, to force the sling members off of the hook portion.

Claims12

Dependent claims

An improved remote sling release for a crane, said sling release comprising a main plate member including an access hole for attaching a main crane hoisting line therethrough, a hook portion located at an opposite end from said access hole adapted to selectively hold securely or release sling members thereon, an axle hole therethrough, and a spring holder extending from a surface thereon;

two sling ejector plate members connected to one another by an elongated axle placed through said axle hole in said main plate member, such that said ejector plate members are pivotally attached to said main plate member, wherein each said sling ejector plate member has a sling notch therein adapted to receive said sling members;
a sling access handle member attached to at least one of said sling ejector plate members and used to manually rotate said ejector plate members from an open position for receiving said sling members therein and into a closed position, wherein said sling member are locked upon said hook portion of said main plate member;
a locking mechanism attached to said main plate member and adapted to lock said ejector plate members in said closed position;
a remotely controlled solenoid mechanism attached to said main plate member and adapted to unlock said locking mechanism;
and a first traction spring member connected between said main plate spring holder and one of said two sling ejector plate members and adapted to bias said ejector plate members into said open position and force said sling members off of said hook portion of said main plate member;
and a remote control mechanism adapted to remotely activate said solenoid mechanism, and thereby remotely force said sling members off of said hook portion of said main plate member.

3 more elements

A combination of a mechanical crane and an improved remote sling release, said combination comprising a mechanical crane having an elongated boom, a main crane hoisting line extending through said boom and down towards the ground, and a hook connector at a distal end of said hoisting line;

and an improved remote sling release comprising a main plate member including an access hole for attaching said main crane hoisting line therethrough, a hook portion located at an opposite end from said access hole and adapted to selectively hold securely or release sling members thereon, an axle hole therethrough, and a spring holder extending from a surface thereon;
two sling ejector plate members connected to one another by an elongated axle placed through said axle hole in said main plate member, such that said ejector plate members are pivotally attached to said main plate member, wherein each said sling ejector plate member has a sling notch therein adapted to selectively receive or remove said sling members therein;
a sling access handle member attached to at least one of said sling ejector plate members and used to manually rotate said ejector plate members from an open position for receiving said sling members therein and into a closed position, wherein said sling member are locked upon said hook portion of said main plate member;
a locking mechanism attached to said main plate member and adapted to lock said ejector plate members in said closed position;
a remotely controlled solenoid mechanism attached to said main plate member and adapted to unlock said locking mechanism;
and a first traction spring member connected between said main plate spring holder and one of said two sling ejector plate members and adapted to bias said ejector plate members into said open position and force said sling members off of said hook portion of said main plate member;
and a remote control mechanism adapted to remotely activate said solenoid mechanism, and thereby remotely force said sling members off of said hook portion of said main plate member.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/186,031Filed 21 Feb 2014
Priority: GB 1303118.221 Feb 2013
Published: US 2015/0239712 A127 Aug 2015
Granted: 8 Aug 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

B66C 1/36
Crane hooks: with means, e.g. spring-biased detents, for preventing inadvertent disengagement of loads
B66C 1/34
Rigid members, e.g. L-shaped members, with parts engaging the under surface of the loads; Crane hooks: crane hooks
B66C 13/18
Other constructional features or details: control systems or devices
B66C 15/065
Arrangements or use of warning devices: electrical