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US 6,892,860 B2Granted
Scaffold with leg lock
AssigneeCosco Management, Inc.
InventorsWilliam R. Gibson, Paul K. Meeker, Luke Hillebrecht
Life of this patent
Estimating the term…
Abstract
A scaffold includes a platform, a pivotable leg unit, and a leg lock. The leg lock is used to lock the leg unit in an extended position for use of the scaffold.
Claims27
A scaffold comprising
- a platform including a plank end cap and a plank to support a person thereon, the plank being elongated so as to include opposite first and second plank end portions, the plank end cap being coupled to the first plank end portion,
- a leg unit coupled to the platform for pivotable movement relative thereto about a leg pivot axis between an extended position and a collapsed position, and
- leg lock means for locking the leg unit in the extended position and for allowing pivotable movement of the leg unit between the extended position and the collapsed position, wherein the leg lock means includes a pivotable latch pivotable about a latch pivot axis and coupled to one of the leg unit to latch to the plank end cap and the plank end cap to latch to the leg unit, and wherein, upon movement of the leg unit to the extended position, the leg pivot axis is arranged to lie between the second plank end portion and the latch pivot axis.
A scaffold comprising
- a platform including a plank end cap and a plank to support a person thereon, the plank being elongated so as to include opposite plank end portions, the plank end cap being coupled to one of the plank end portions,
- a leg unit coupled to the platform for pivotable movement relative thereto between an extended position and a collapsed position, and
- a latch coupled to the leg unit for pivotable movement relative thereto between a latch position to latch to the plank end cap to lock the leg unit in the extended position and a release position to release the plank end cap to allow pivotable movement of the leg unit from the extended position to the collapsed position, wherein the leg unit includes a pair of legs and a leg connector extending therebetween and the latch is coupled to the leg connector for pivotable movement and wherein the leg connector includes a leg attachment coupled to each leg and a first recessed portion positioned between the leg attachments and the latch is positioned within the recessed portion.
A scaffold comprising
- a platform including a plank end cap and a plank to support a person thereon, the plank being elongated so as to include opposite plank end portions, the plank end cap being coupled to one of the plank end portions,
- a leg unit coupled to the platform for pivotable movement relative thereto between an extended position and a collapsed position, and
- a latch coupled to the leg unit for pivotable movement relative thereto between a latch position to latch to the plank end cap to lock the leg unit in the extended position and a release position to release the plank end cap to allow pivotable movement of the leg unit from the extended position to the collapsed position, wherein the leg unit includes a pair of legs and a leg connector extending therebetween and the latch is coupled to the leg connector for pivotable movement and wherein the leg connector includes an upper wall, the plank end cap includes a lower wall, and the upper and lower walls are arranged to mate with one another when the leg unit assumes the extended position.
A scaffold comprising
- a platform including a plank end cap and a plank to support a person thereon, the plank being elongated so as to include opposite plank end portions, the plank end cap being coupled to one of the plank end portions,
- a leg unit coupled to the platform for pivotable movement relative thereto between an extended position and a collapsed position, and
- a latch coupled to the leg unit for pivotable movement relative thereto between a latch position to latch to the plank end cap to lock the leg unit in the extended position and a release position to release the plank end cap to allow pivotable movement of the leg unit from the extended position to the collapsed position, wherein the plank end cap includes a latch receiver, a latch pivoter, and a pivot blocker, the latch receiver is arranged to receive the latch upon pivotable movement of the leg unit to the extended position, the latch pivoter is arranged to pivot the latch away from the latch position for reception in the latch receiver upon pivotable movement of the leg unit to the extended position, and the pivot blocker is arranged to engage the latch to block pivotable movement of the leg unit away from the extended position.
A scaffold comprising
- a platform including a plank end cap and a plank to support a person thereon, the plank being elongated so as to include opposite plank end portions, the plank end cap being coupled to one of the plank end portions,
- a leg unit coupled to the platform for pivotable movement relative thereto between an extended position and a collapsed position, and
- a latch coupled to the leg unit for pivotable movement relative thereto between a latch position to latch to the plank end cap to lock the leg unit in the extended position and a release position to release the plank end cap to allow pivotable movement of the leg unit from the extended position to the collapsed position, wherein the plank end cap is formed to include a latch-receiving opening, a latch access opening, and a passageway extending between the latch-receiving opening and the latch access opening to define a latch-receiving cavity, the latch is arranged to enter and exit the latch-receiving cavity through the latch-receiving opening upon pivotable movement of the leg unit to and from the extended position, and the latch access opening provides means for admitting a force generator into the latch-receiving cavity while the latch extends into the latch-receiving cavity through the latch-receiving opening to allow application of a release force by the force generator to the latch to pivot the latch to the release position when the latch is positioned in the latch-receiving cavity.
A scaffold comprising
- a platform including a plank end can and a plank to support a person thereon, the plank being elongated so as to include opposite plank end portions, the plank end cap being coupled to one of the plank end portions,
- a leg unit coupled to the platform for pivotable movement relative thereto between an extended position and a collapsed position, and
- a latch coupled to the leg unit for pivotable movement relative thereto between a latch position to latch to the plank end can to lock the leg unit in the extended position and a release position to release the plank end cap to allow pivotable movement of the leg unit from the extended position to the collapsed position, wherein the plank end cap includes a plank receiver and a latch receiver, the plank receiver receives the one of the plank end portions, and the latch receiver is positioned below the plank receiver and arranged to receive the latch upon pivotable movement of the leg unit to the extended position.
A scaffold comprising
- a platform including a plank end cap and a plank to support a person thereon, the plank being elongated so as to include opposite plank end portions, the plank end cap being coupled to one of the plank end portions,
- a leg unit coupled to the platform for pivotable movement relative thereto between an extended position and a collapsed position, and
- a latch coupled to the leg unit for pivotable movement relative thereto between a latch position to latch to the plank end can to lock the leg unit in the extended position and a release position to release the plank end cap to allow pivotable movement of the leg unit from the extended position to the collapsed position, wherein the plank end cap is formed to include a first wall extending over the one of the plank end portions, a second wall extending under the one of the plank end portions, and the one of the plank end portions is coupled to the second wall.
A scaffold comprising
- a platform including a plank end cap and a plank to support a person thereon, the plank being elongated so as to include opposite plank end portions, the plank end cap being coupled to one of the plank end portions,
- a leg unit coupled to the platform for pivotable movement relative thereto between an extended position and a collapsed position, and
- a latch coupled to the plank end cap for pivotable movement relative thereto between a latch position to latch to the leg unit to lock the leg unit in the extended position and a release position to release the leg unit to allow pivotable movement of the leg unit from the extended position to the collapsed position, wherein the latch includes a base coupled to the plank end can and a leg-engaging catch appended to the base and arranged to engage the leg unit upon movement of the leg unit to the extended position and wherein the leg-engaging catch is arranged to extend beyond an end of the plank during movement of the latch from the release position to the latch position.
A scaffold comprising
- a platform including a plank end can and a plank to support a person thereon, the plank being elongated so as to include opposite plank end portions, the plank end can being coupled to one of the plank end portions,
- a leg unit coupled to the platform for pivotable movement relative thereto between an extended position and a collapsed position, and
- a latch coupled to the plank end cap for pivotable movement relative thereto between a latch position to latch to the leg unit to lock the leg unit in the extended position and a release position to release the leg unit to allow pivotable movement of the leg unit from the extended position to the collapsed position, wherein the leg unit includes a pair of legs and a leg connector extending therebetween, the leg connector includes a latch receiver arranged to receive the latch upon pivotable movement of the leg unit to the extended position, a latch pivoter arranged to pivot the latch away from the latch position for reception in the latch receiver, and a pivot blocker arranged to engage the latch to block pivotable movement of the leg unit away from the extended position.
A scaffold comprising
- a platform including a plank end cap and a plank to support a person thereon, the plank being elongated so as to include opposite plank end portions, the plank end cap being coupled to one of the plank end portions,
- a leg unit coupled to the platform for pivotable movement relative thereto between an extended position and a collapsed position, and
- a latch coupled to the plank end can for pivotable movement relative thereto between a latch position to latch to the leg unit to lock the leg unit in the extended position and a release position to release the leg unit to allow pivotable movement of the leg unit from the extended position to the collapsed position, wherein the leg unit includes a pair of legs and a leg connector extending therebetween, the leg connector includes a recessed portion, and the latch is positioned within the recessed portion.
A scaffold comprising
- a platform to support a person thereon, the platform being elongated so as to include opposite platform end portions,
- a leg unit pivotable about a leg pivot axis and coupled to a first of the platform end portions for pivotable movement relative to the platform between an extended position and a collapsed position, and
- a latch pivotable about a latch pivot axis and coupled to the leg unit for pivotable movement relative thereto between a latch position to latch to the first platform the end portion to lock the leg unit in the extended position and a release position to release the first platform end portion to allow pivotable movement of the leg unit from the extended position to the collapsed position wherein the latch pivot axis is spaced from the leg pivot axis and moves with respect to the leg pivot axis when the leg unit moves between the extended position and collapsed position.
Dependencies are inferred from the claim text.