E - Fixed Constructions – 06 – C
Patent
E - Fixed Constructions
06
C
E06C 1/22 (2006.01) E06C 1/10 (2006.01) E06C 1/18 (2006.01) E06C 1/39 (2006.01) E06C 7/42 (2006.01)
Patent
CA 2373303
An adjustable-height stepladder has an upper-front frame and an upper-rear frame interconnected by a top member. The upper-front frame and the upper-rear frame each have an elongate slide track. A lower-front frame, wider than the upper-front frame and positioned centrally rearward thereof, has a pair of rails, each having a slide mechanism slidingly engageable with the slide track of the corresponding upper-front frame rail. A lower-rear frame, wider than the upper-rear frame and positioned centrally forward thereof, has a pair of rails, each having a slide mechanism slidingly engageable with the slide track of the corresponding upper-rear frame rail. Each slide mechanism has a hinged swing arm and a biasing spring, the combination of which allows the slide mechanisms to engage the slide tracks although the lateral distance between the upper-frame rails and their corresponding lower-frame rails may vary. Accordingly, the stepladder is height-adjustable when the rails of the various frames are flared as well as when they are parallel.
Shannon Kyle
Tomkins Donald V.
LandOfFree
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