US 12,404,151 B2
System and apparatus for moving objects
Christopher Cowell, Pitlochry Perth and Kinross (GB); and Elliot Tanner, Montgomery Powys (GB)
Assigned to TREEMAGINEERS LTD, Pitlochry (GB)
Appl. No. 17/436,287
Filed by TREEMAGINEERS LTD, Pitlochry (GB)
PCT Filed Mar. 5, 2020, PCT No. PCT/GB2020/050513
§ 371(c)(1), (2) Date Sep. 3, 2021,
PCT Pub. No. WO2020/178580, PCT Pub. Date Sep. 10, 2020.
Claims priority of application No. 1902979 (GB), filed on Mar. 6, 2019.
Prior Publication US 2022/0177280 A1, Jun. 9, 2022
Int. Cl. B66C 21/00 (2006.01); A63G 21/22 (2006.01)
CPC B66C 21/00 (2013.01) [A63G 21/22 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A trolley for lifting and/or moving a load on one or more lines comprising:
a first side plate and a second side plate; and
a plurality of sheave assemblies in which each sheave assembly includes
a sheave axle that includes an axle shaft which projects from the first plate and passes into a hole in the second plate, wherein the sheave axle is in tension between the plates,
and
a sheave cartridge carried directly on the axle shaft between the plates,
wherein each sheave cartridge includes:
a pulley wheel rotatable on a bearing around an axis of the axle shaft; and
a removable retention fastener that extends through the hole in the second plate to engage directly with the axle shaft to removably secure the second plate to the first plate via the axle shaft,
wherein the axes of the axle shafts of the plurality of sheave assemblies are parallel to one another,
wherein the sheave axle is secured to the first plate by the releasable fixation fastener with axial and rotational movement of the sheave axle with respect to the first plate being prevented, and
wherein removal of the sheave axle from the first plate is not required to gain access to each sheave assembly.