Abrégé

A ladder with a guardrail is provided. The U-shaped guardrail has a center arm portion and two side arm portions. Each slot is provided through a side arm portion and has an elongated oval shape. Each hinge center bolt is disposed through a slot and engages a side arm portion to a hinge rotatably. The guardrail lock is disposed at the side arm portion, and the guardrail lock comprises first and second locks, a center rivet, a pair of stopper pins, and a torsion spring. The first or second lock has a guiding curve portion, a circular locking portion, and a through-hole. The center rivet is queued through the through-holes and fixes the first and second locks to the side arm portion rotatably and fixed to the side arm portion. The first and second locks receives and is locked to locking pins on top portions of the side rail.

Classes IPC  ?

• E06C 7/18 - Dispositifs pour empêcher la chute des utilisateurs

Abrégé

A ladder stabilizer is provided, comprising an extension bar portion, a main arm portion, a brace bar portion, teeth strips, and levers. The extension bar portion is enclosed by an outer wall surface, an inner wall surface, and two side wall surfaces, and having upper and lower end portions. The main arm portion has upper and lower end portions configured for a telescopic connection. The brace bar portion has first and second end portions, and the first end portion is connected to the side portion at a lower position, and the second end portion is connected to the extension bar portion at a middle position. The teeth strips are fixed to lower portions of the two side wall surfaces of the main arm portion. Each lever has latching and releasing ends, installed on the two side wall surfaces of the extension bar through two spring-loaded hinges.

Classes IPC  ?

• E06C 7/42 - Pieds d'échellesLeurs supports
• E06C 1/18 - Échelles susceptibles de rester dressées d'elles-mêmes avec supports reposant sur le sol à jambes de force ou supports en forme d'échelles
• F16C 11/04 - Articulations
• E06C 1/32 - Échelles avec supports en forme d'échelle pouvant être fixés dans leur prolongement

Abrégé

A rung lock assembly is provided for a ladder, and comprises rung lock portions, a pinion gear, compression springs, a rung body, a rung cover, a center bolt, a spacer, and a fastener portion. Each of the rung lock portions comprises a rod portion, a rack block fixed to the rod portion, a locking portion, a holding portion connecting the rod portion to the locking portion so that the rod portion is disposed in parallel with the locking portion and configured to be held and pulled by a user's hand, and the rung lock portions are anchored by guide plates and disposed in parallel with each other. The pinion gear is disposed between and engaging the rack blocks, so that the rung lock portions translate outwards or inwards together. The distance between the locking portion is increased in both directions simultaneously by pulling one of the holding portions.

Classes IPC  ?

• E06C 7/06 - Dispositifs de fixation ou crochets pour éléments d'échelles extensibles
• F16B 7/10 - Systèmes télescopiques
• E06C 1/18 - Échelles susceptibles de rester dressées d'elles-mêmes avec supports reposant sur le sol à jambes de force ou supports en forme d'échelles