Device for lifting and tilting concrete panels
AssigneeFabcon, Inc.
InventorsDavid W. Hanson, Richard C. Nash, Richard R. Koehn
Life of this patent
Estimating the term…
Abstract
A device for both lifting and dumping of core material from long hollow core concrete panels. The device utilizes a pair of retractable clamp members to engage the longitudinal groove in the side of the panel.
Claims23
Apparatus for lifting concrete panels, said apparatus including two or more lifting clamps, each of which comprises:
- a first beam;
- a second beam;
- a first clamping head rigidly connected to said first beam;
- said first clamping head constructed and arranged to engage said panel on one sidewall thereof;
- a second clamping head rigidly connected to said second beam, said second clamping head constructed and arranged to engage said panel on an opposite sidewall thereof;
- means for moving said first beam relative to said second beam to selectively engage and disengage one or both of said clamping heads from the sidewall of said panel;
- and
- connection means connected to said apparatus and constructed and arranged for connection to a lifting cable, said connection means providing for pivotal movement of said apparatus and said first and second clamping heads about an axis through said panel below said beams.
Apparatus for suspension from lifting cables depending from an overhead crane, said apparatus constructed and arranged to lift and tilt concrete panels, said apparatus including two or more lifting clamps, each of which comprises:
- a pair of extendable beams;
- a pair of clamping heads, one each of which is suspended from one end of each of said pair of extendable beams, each one of said pair of clamping heads constructed to engage said panel on a sidewall thereof;
- connection means connected to said apparatus and said lifting cable, said connection means providing for pivotal movement of said apparatus and said pair of clamping heads about an axis through said panel below said pair of extendable beams;
- and
- means for extending and retracting said pair of extendable beams relative to each other to position said pair of clamping heads to grip said panel on adjacent sides.
Apparatus for suspension from lifting cables depending from an overhead crane, said apparatus constructed and arranged to lift and tilt concrete panels, said apparatus including two or more lifting clamps, each of which comprises:
- an extendable beam;
- a pair of clamping heads suspended from each end of said extendable beam, each of said clamping heads constructed to engage said panel on a sidewall thereof;
- connection means connected to said apparatus and said lifting cable, said connection means providing for pivotal movement of said apparatus and said pair of clamping heads about an axis through said panel below said beam;
- and
- means for extending and retracting said beam to position said pair of clamping heads to grip said panel on adjacent sides.
Apparatus for suspension from lifting cables depending from an overhead crane, said apparatus constructed and arranged to lift and tilt concrete panels, said apparatus including two or more lifting clamps, each of which comprises:
- a pair of beams;
- a pair of clamping heads, one each of which is suspended from one end of each of said pair of beams, each one of said pair of clamping heads constructed to engage said panel on a sidewall thereof;
- connection means connected to said apparatus and said lifting cable, said connection means providing for pivotal movement of said apparatus and said pair of clamping heads about an axis through said panel below said pair of beams;
- and
- means for moving said pair of beams relative to each other to position said pair of clamping heads to grip said panel on adjacent sides.
Apparatus for suspension from lifting cables depending from an overhead crane, said apparatus constructed and arranged to lift and tilt concrete panels, said apparatus including two or more lifting clamps, each of which comprises:
- first and second beams, each of which has a clamping head suspended from one end thereof for engagement with opposite sidewalls of said panel;
- means connected between said first beam and the other end of said second beam for elevating the end of said second beam relative to said first beam to selectably pivot said second beam and clamping head suspended from it into and out of engagement with sidewalls of said panel;
- and
- connection means connected to said apparatus and said lifting cable, said connection means providing for pivotal movement of said apparatus and said clamping heads about an axis through said panel below said first and second beams.
Dependencies are inferred from the claim text.