Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Hinge – Including means to hold or retard hinged members against...
Patent
1981-02-04
1983-09-13
Bell, Paul A.
Miscellaneous hardware (e.g., bushing, carpet fastener, caster,
Hinge
Including means to hold or retard hinged members against...
16326, 16328, E05D 1110
Patent
active
044033737
ABSTRACT:
A hinge fitting for a foldable ladder having two fitting parts connected to each other by a hollow hinge pin, an interlocking device with openings in the two fitting parts to the openings in one fitting part respectively there is associated one of each of positions of swing permitting interlocking, a guide pin mounted turnably and longitudinally displaceably in the hinge pin, at least one locking bolt spaced radially from the hinge pin and arranged parallel to it, the locking bolt being movable by means of a handle connecting it to the guide pin against the force of a return spring from an interlocking position (with the locking bolt engaging into aligned of the openings of the two fitting parts) into an unlocked position with the locking bolt being located outside the opening of the one fitting part, and a locking device which secures the guide pin towards the end of its displacement from the interlocking positions into the unlocked position and without impairing its turnability against return into the interlocking position under the action of the return spring, the locking device having at least one spring locking element coordinated to the guide pin and the hinge pin in connection with one of the two pins which carries the locking element along upon movement of said one pin, the locking element in said unlocked position engaging in a locking position thereof into a recess in the other pin, and at least one control element for bringing the locking element into its unlocked position out of engagement with the recess by a swinging movement of the fitting parts by a predetermined angle which angle aligns a surface region of the one fitting part with the locking bolt, which surface region prevents the return of the locking bolt into the interlocked position. The recess has a length which is limited in the circumferential direction of the one pin and is limited at least at one end by a guide surface of the control element, the guide surface guides the locking element out of the recess.
REFERENCES:
patent: 2024039 (1935-12-01), Harting
patent: 3955240 (1976-05-01), Schuh et al.
Bell Paul A.
Farber Martin A.
LandOfFree
Hinge fitting for foldable 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 Hinge fitting for foldable ladders, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hinge fitting for foldable ladders will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1723911