Joints and connections – Structurally installed in diverse art device
Patent
1986-09-22
1987-05-19
Kundrat, Andrew V.
Joints and connections
Structurally installed in diverse art device
403 96, 182163, 182 24, 16324, 16329, 16331, F16D 100
Patent
active
046663274
ABSTRACT:
A joint for foldable aluminum ladders comprising a first base, a second base, a control plate and a selecting means. The second base has a middle plate inserted between two parallel plates which are connected at the end of the first base. The control plate is inserted between one of the parallel plates and the middle plate. The parallel plates, middle plate and control plate each have a central hole to allow a sleeve to be inserted therethrough. The parallel plates, middle plate and control plate also have apertures which lay some distance along the edges. The selecting means has a fixing link inserted through the sleeve and an inserting link which is shorter than the fixing link. A compressible spring is disposed around the lower end of the fixing link and a nut is secured at the threaded portion of the fixing link. When the selecting means is pulled outwardly, the legs of the ladder can be freely rotated to adjust the angle of the ladder, then the angle of the ladder is fixed with the inserting link being inserted through the most appropriate apertures of the first base, second base and control plate.
REFERENCES:
patent: 3731342 (1973-05-01), Cousin
patent: 3811151 (1974-05-01), Kuemmerlin
patent: 4407045 (1983-10-01), Boothe
patent: 4566150 (1986-01-01), Boothe
Kundrat Andrew V.
Rosenberg Morton J.
LandOfFree
Joint for foldable aluminum ladders does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Joint for foldable aluminum ladders, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Joint for foldable aluminum ladders will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1561089