Flange lifter device
View Patent ↗A pipe flange lifting device for supporting and leveling two holes of a blind flange during installation onto a pipe end. The device comprises two L-shaped claws connecting to a common pin, forming an overall triangular-shaped device having a crane hoist fitting. The claws are positioned on opposing sides of a pipe flange and rotate freely with respect to the pin prior to installation, whereafter the claws are fitted beneath lifting bolts fitted through a flange for stable support during operation. The lifting bolts comprise a pair of bolts inserted into eyes of the flange prior to the lifting operation. Spacers along the pin allow the claws to be separated by a desired distance and prevent pinch points due to claw inclination. The design of the claws provides stable support for two lift bolts of a pipe flange and assists in the installation process.
1. A pipe flange lifting device, comprising:
a set of generally L-shaped claws separated by a given offset distance;
each of said claws having a diagonal and a horizontal portion, said diagonal portion of each claw being rotatably attached to a pin spanning said offset distance between claws;
said horizontal portion further comprising a ledge area adapted to support a pair of lifting bolts and having an upstanding catch disposed at its distal end;
said pin having crane hoist fitting at its midpoint for connecting said device to a lifting apparatus;
a plurality of spacers along said pin between said crane hoist fitting and said claws to adjust said offset distance and prevent pinch points.
2. The device of claim 1 , wherein said pin separates from said claws for the purpose of adding or removing said spacers.
3. The device of claim 1 , wherein said device has two configurations; a lifting configuration wherein said device has an overall triangular shape, and an open configuration wherein said claws pivotally rotate around said common pin as said claws are pulled outward away from one another.
4. The device of claim 1 , wherein said ledge area is coated with a material to preventing damage to said lifting bolts during use.
5. The device of claim 4 , wherein said material is a high density rubber.
6. The device of claim 1 , wherein said claw diagonal portion further comprises a protrusion forming a semi-enclosed cavity at the apex of said L-shaped claw, adapted to engage a lifting bolt upon slacking said lifting apparatus and prevent rotation of said claws.