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US 5,507,364 AGranted
Ladder leveler
OwnerStephen T. Spevakinventor
Life of this patent
Estimating the term…
Abstract
A ladder leveler includes a frame unit that is adjustable in two degrees of freedom and has a wide range of adjustment. The rungs of a ladder being leveled are supported, and brakes are located between the rung supporting element and the remainder of the frame unit. The brakes can be located between the rung supporting element and crossbars on the frame unit and/or between the crossbars and stanchions of that frame unit. At least two rungs of the ladder are supported. If three rungs are supported, one of the rungs will be supported from beneath that rung, and the stanchions are telescoping.
Claims20
A ladder leveler comprising:
- A) a frame unit for releasable attachment to a ladder, said frame unit including
- (1) two stanchions spaced apart a distance that exceeds the outer width dimension of a ladder, each stanchion having a foot section and a top section and means for adjusting the length thereof,
- (2) two crossbars each attached to said stanchions,
- (3) fastening means for pivotally attaching each end of each of said crossbars to one of said stanchions so said crossbars can move with respect to said stanchions,
- (4) a rung support means attached to said frame unit for supporting rungs of the ladder, with one of the rungs being supported from beneath, said rung support means including a cutout section into which a rung of the ladder to be supported is received and a strap which fits around the rung being supported for attaching the rung to said rung support element;
- and
- B) brake means for attaching said rung support means to said frame unit and including a first element fixed to one of said crossbars, a second element fixed to said rung support means, a friction pad means for controlling relative movement of said first and second elements and brake setting means for frictionally engaging said first and second elements to said friction pad means.
4 more elements
A ladder leveler comprising:
- A) a frame unit for releasable attachment to a ladder, said frame unit including
- (1) two stanchions spaced apart a distance that exceeds the outer width dimension of a ladder, each stanchion having a foot section and a top section and means for adjusting the length thereof,
- (2) two crossbars each attached to said stanchions,
- (3) fastening means for pivotally attaching each end of each of said crossbars to one of said stanchions so said crossbars can move with respect to said stanchions,
- (4) a rung support means attached to said frame unit for supporting rungs of the ladder, with one of the rungs being supported from beneath, said rung support means including a cutout section into which a rung of the ladder to be supported is received and a strap which fits around the rung being supported for attaching the rung to said rung support element;
- and
- B) brake means on said frame unit for controlling movement of said rung support element with respect to said stanchions and including a bolt fixed to said rung support element for movement therewith, a fastener element attached to said bolt for movement therewith and a friction pad interposed between said fastener element and a stanchion.
4 more elements
Dependencies are inferred from the claim text.