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公开(公告)号：US12232622B2
公开(公告)日：2025-02-25
申请号：US17384830
申请日：2021-07-26
Inventor： Xuelin Zhu , Baisong Yao , Weiqiang Liu
Abstract: A folding step stool includes a stool surface and a support structure for supporting the stool surface. The support structure is a foldable structure and comprises at least three support shafts. The stool surface is hinged to a rear side of a connecting line of tops of two adjacent support shafts. After being folded, the support structure is located on one side of a plane formed by the two support shafts hinged to the stool surface. After being turned, the stool surface is located on the other side of the plane formed by the two support shafts to which the stool surface is hinged, and the two support shafts are able to abut against the two support shafts to which the stool surface is hinged. The invention solves the problem that step stools in the prior art still have a large size after being folded.
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公开(公告)号：US20220349254A1
公开(公告)日：2022-11-03
申请号：US17732573
申请日：2022-04-29
Inventor： Xuelin ZHU , Baisong YAO , Weiqiang LIU
Abstract: A two-step step stool includes a primary stool and a secondary stool. The primary stool includes a primary supporting plate and a primary pedal hinged with a top of the primary supporting plate. The secondary stool includes a secondary supporting plate and a secondary pedal hinged with a top of the secondary supporting plate. The secondary pedal is higher than the primary pedal. A middle plate is arranged between the primary stool and the secondary stool and is respectively hinged with the primary pedal and the secondary pedal. A linkage mechanism capable of folding the primary stool and the secondary stool synchronously is further arranged between the primary stool and the secondary stool. The two-step step stool can be drawn close towards the middle plate when being folded by hinging the primary pedal with the middle plate and hinging the secondary pedal with the middle plate.
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公开(公告)号：US11821262B2
公开(公告)日：2023-11-21
申请号：US16741750
申请日：2020-01-14
Inventor： Chen Hui Zhu , Baisong Yao
Abstract: A lifting positioning structure for a ladder tool platform comprises a ladder. The ladder comprises front supporting legs, rear supporting legs, connectors fixedly connected to the front supporting legs, plug pins, and elastic parts, wherein each front supporting leg includes a big tube and a small tube which are able to relatively move in an extension direction. The connectors are formed with vertically-through installation cavities which allow the big tubes to be inserted therein. The big tubes are arranged in the installation cavities and are fixedly connected to the connectors which extend to form connection parts rotationally connected to the rear supporting legs. The small tubes are connected to a tool platform. The plug pins are movably arranged on the connectors or the big tubes.
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公开(公告)号：US20230119062A1
公开(公告)日：2023-04-20
申请号：US17582006
申请日：2022-01-24
Inventor： Xuelin ZHU , Baisong YAO , Weiqiang LIU
Abstract: A ladder is provided. The ladder includes a ladder frame, wherein on the ladder frame foot boards are disposed, wherein the ladder frame includes a front bracket and a back bracket; the front bracket is provided with fixing joints; a handrail collapsible by sliding or overturning is disposed on the fixing joints; collapsing/unfolding structures for collapsing or unfolding the handrail are disposed between the fixing joints and the handrail; and after the ladder frame and the handrail are collapsed, a footprint of the handrail in a thickness direction is not more than a footprint of the fixing joints. By disposing the fixing joints to mount the handrail for providing a clearance space to collapse the handrail, the handrail is collapsed, by sliding or overturning, to an inner side of the ladder frame without increasing a footprint of a wholly collapsed ladder.
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公开(公告)号：US11083302B2
公开(公告)日：2021-08-10
申请号：US16299092
申请日：2019-03-11
Inventor： Heng Yan , Baisong Yao
Abstract: A folding locking mechanism used for a step stool is disclosed. The step stool includes a stool plate, stool legs rotatably arranged on the stool plate and a locking mechanism used for locking the stool legs. The locking mechanism includes a first connecting piece and a pin, wherein the first connecting piece is fixedly connected with the stool plate and is provided with a limiting hole allowing the pin to fall therein, and the pin is limited in the radial direction and is movable in the axial direction, relative to the stool legs.
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Patent Agency Ranking
公开(公告)号：US20190387887A1
公开(公告)日：2019-12-26
申请号：US16299092
申请日：2019-03-11
Inventor： HENG YAN , BAISONG YAO
Abstract: A folding locking mechanism used for a step stool is disclosed. The step stool includes a stool plate, stool legs rotatably arranged on the stool plate and a locking mechanism used for locking the stool legs. The locking mechanism includes a first connecting piece and a pin, wherein the first connecting piece is fixedly connected with the stool plate and is provided with a limiting hole allowing the pin to fall therein, and the pin is limited in the radial direction and is movable in the axial direction, relative to the stool legs.
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公开(公告)号：US20230008962A1
公开(公告)日：2023-01-12
申请号：US17782668
申请日：2020-11-16
Inventor： Xuelin ZHU , Baisong YAO , Weiqiang LIU
Abstract: A rotation control mechanism comprises a first rotating member, a second rotating member, and a first locking pin. The first rotating member is provided with a pin hole. The second rotating member is provided with a locking hole. The first locking pin is inserted into the pin hole and the locking hole to lock the first rotating member and the second rotating member. The first locking pin and the first rotating member are circumferentially limited and movably arranged in an axial direction. A first elastic member is connected to the first locking pin and applies an action force to the first locking pin to be inserted into the locking hole. The second rotating member is provided with a trigger portion, and the first rotating member is provided with an elastic braking portion. The folding ladder comprises two ladders and two rotation control mechanisms.
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公开(公告)号：US20220369820A1
公开(公告)日：2022-11-24
申请号：US17384830
申请日：2021-07-26
Inventor： Xuelin ZHU , Baisong YAO , Weiqiang LIU
Abstract: A folding step stool includes a stool surface and a support structure for supporting the stool surface. The support structure is a foldable structure and comprises at least three support shafts. The stool surface is hinged to a rear side of a connecting line of tops of two adjacent support shafts. After being folded, the support structure is located on one side of a plane formed by the two support shafts hinged to the stool surface. After being turned, the stool surface is located on the other side of the plane formed by the two support shafts to which the stool surface is hinged, and the two support shafts are able to abut against the two support shafts to which the stool surface is hinged. The invention solves the problem that step stools in the prior art still have a large size after being folded.
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公开(公告)号：US11319751B2
公开(公告)日：2022-05-03
申请号：US16293651
申请日：2019-03-06
Inventor： Chen Hui Zhu , Baisong Yao
Abstract: A telescopic positioning structure used for a ladder is disclosed. The ladder includes a front supporting leg and a rear supporting leg. The front supporting leg includes a first tube and a second tube, and the first tube and the second tube are able to move relative to each other in an extension direction. The rear supporting leg is rotatably connected with the first tube. The ladder further includes a pin connected with the first tube. When the rear supporting leg is unfolded, an upper end of the rear supporting leg abuts against the pin and drives to the pin to move towards the second tube, and when the pin abuts against the second tube, the second tube is positioned.
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公开(公告)号：US20210259505A1
公开(公告)日：2021-08-26
申请号：US17266646
申请日：2019-05-22
Inventor： Chenhui ZHU , Juhong ZHANG
IPC: A47L13/58
Abstract: A water discharge control structure of a washing bucket capable of separating clean water from dirty water for washing a cleaning tool includes: a washing bucket body and a water storage tank, wherein the washing bucket body is internally provided with a lifting frame fitted with the cleaning tool, and the lifting frame is driven by the cleaning tool to be lifted and lowered relative to the washing bucket body; the water storage tank is connected to the washing bucket body and has a water outlet directing to the cleaning tool, a discharge of water of the water outlet is controlled by a plug, and when the lifting frame is in a high position, the lifting frame drives the plug to block the water outlet; and when the lifting frame is in a low position, the lifting frame drives the plug in a linked manner to open the water outlet.
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