Class / Patent application number | Description | Number of patent applications / Date published |
182104000 | PIVOTALLY CONNECTED LADDERS, MUTUALLY SUSTAINING | 10 |
20090000867 | Plastic ladder - A ladder made by plastic material includes a first ladder unit which includes two side rails with a plurality of rungs integrally connected between the two side rails. A head step is integrally connected to two respective top ends of the two side rails. The first ladder unit includes an open first side and a closed second side. Each of the rungs includes a latitude rib and altitude ribs connected to an inner periphery of the open first side so as to define a plurality of chambers in the open first side of each rung, and each side rail includes two sidewalls and a plurality of latitude ribs connected between the two sidewalls so as to define chambers separated by the latitude ribs. Each rung has an anti-slip top surface. A second ladder unit can be pivotably connected to the first ladder unit at two respective head steps. | 01-01-2009 |
20130186710 | ELEVATED WORKING PLATFORM AND RELATED METHODS - Elevated work platforms, as well as associated methods, are provided. In one particular embodiment, an elevated platform apparatus is provided comprising a first rail assembly having a pair of rails coupled with a plurality of rungs, a second rail assembly hingedly coupled with the first rail assembly, a platform configured to rest upon a portion of the first rail assembly and the second rails assembly and a cage associated with the platform. The cage may include at least one bar and at least one gate, the at least one gate being configured to swing in a first direction upon a user stepping on to the platform from the first rail assembly, and then swing back to a closed position after the user is standing on the platform. The at least one gate is also limited from being displaced in a second direction, opposite the first direction, beyond the closed position. | 07-25-2013 |
20150060201 | Self Leveling Step Ladder with a Universal Hinge Joint - A self leveling stepladder with a universal hinge joint providing many new advantages that traditional a-frame step ladders are not capable to deliver. | 03-05-2015 |
20150090531 | ASSEMBLED A-SHAPED LADDER - An assembled ladder is formed by coupling a top ladder segment, a plurality of middle ladder segments, and a plurality of bottom ladder segments together. The bottom ladder segments include a ladder body, support frame assemblies, ancillary frames, adjustable support pads, and adjustable coupling members. The support frame assemblies are respectively set at two sides of the ladder body. The ancillary frames are mounted to the support frame assembly. The adjustable support pads are screwed to the ancillary frames. The adjustable coupling members have an end coupled to the support frame assemblies and are partially received in the receiving space. With the adjustable coupling members fixing the support frame assemblies, the ancillary frames are expanded. Through adjustment made with the adjustable support pads, the ladder can be set more stably to achieve safety and convenience of use. | 04-02-2015 |
20160138335 | LADDERS, LADDER COMPONENTS AND RELATED METHODS - Ladders, ladder components and related methods are provided. In some embodiments, adjustable stepladders are provided which include locking mechanisms that enable height adjustment of the ladder through application of a force towards the rails of the ladder. In other embodiments, spreader mechanisms are provided with cross bracing located and configured to provide additional stability to the ladder while also incorporating a handle that enables efficient collapsing of the ladder while reducing the potential of pinching ones hands or fingers. In another embodiment, a device is provided for selective coupling with the ladder that includes a support or safety rail and an adjustable tray. The device may be coupled with the ladder in a number of different positions including a stowed position. In another embodiment, a hinge assembly is provided having a magnetic component configured to be magnetically coupled with and temporarily store an object on the ladder. | 05-19-2016 |
20160138336 | PRIMARY AND SUBSIDIARY COMPLEX NUMBER TYPE A-SHAPED LADDER - A primary and subsidiary complex number type A-shaped ladder includes a first handheld ladder and a second handheld ladders pivotally connected together, and at least one first extended ladder and one second extended ladders able to be assembled at the bottom ends of the first and the second handheld ladders. The first and the second extended ladders have their top ends respectively provided with a necking down fitting member, while the first and the second handheld ladders have the bottom ends of their vertical bars respectively provided with a fitting opening for the fitting member to be inserted therein. Thus, respective first extended ladder and respective second extended ladder can be stored or transported independently, or can be respectively assembled at the bottom ends of the first and the second handheld ladders to have the A-shaped ladder extended to a position high enough for use. | 05-19-2016 |
20160153232 | TELESCOPING LADDER WITH STABILIZERS | 06-02-2016 |
20160177625 | WORKING LADDER | 06-23-2016 |
20180023343 | STAGGERED STEP TRESTLE LADDER | 01-25-2018 |
20190145170 | WALKTHROUGH AND STANDOFF MECHANISMS FOR LADDERS, LADDERS INCORPORATING SAME AND RELATED METHODS | 05-16-2019 |