-
公开(公告)号：US11167954B2
公开(公告)日：2021-11-09
申请号：US15754977
申请日：2016-08-24
发明人： David W Smith
摘要： A knockdown, portable lift is relatively compact and lightweight for transport and use where there is no existing means for lifting a load between a lower surface and an upper surface or where the existing means cannot be used. Components of the lift are stored in a base portion of the lift and are assembled on site for forming a lift frame extending between the upper and lower surfaces. A platform and drive assembly are supported on the lift frame and are driven together up and down tracks on each side of the lift frame using a rotary drive, such as a hand crank or electric motor, to power the drive assembly. The drive assembly is operable by a person on or off the platform from either the upper or lower surface or traversing stairs over which the platform is moving. The drive assembly incorporates a unique overspeed braking system and a unique clutch arrangement.
-
公开(公告)号：US11724913B2
公开(公告)日：2023-08-15
申请号：US17489514
申请日：2021-09-29
发明人： David W Smith
CPC分类号： B66B9/08 , B66B9/083 , B66B9/0815 , B66B9/16 , B66B9/193 , F16D13/12 , F16D49/04 , F16D51/04 , F16D59/00
摘要： A knockdown, portable lift is relatively compact and lightweight for transport and use where there is no existing means for lifting a load between a lower surface and an upper surface or where the existing means cannot be used. Components of the lift are stored in a base portion of the lift and are assembled on site for forming a lift frame extending between the upper and lower surfaces. A platform and drive assembly are supported on the lift frame and are driven together up and down tracks on each side of the lift frame using a rotary drive, such as a hand crank or electric motor, to power the drive assembly. The drive assembly is operable by a person on or off the platform from either the upper or lower surface or traversing stairs over which the platform is moving. The drive assembly incorporates a unique overspeed braking system and a unique clutch arrangement.
-
搜索结果
2 条记录 (耗时 0.014 秒)
