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US 12,215,003 B2Granted
Lifting rig for moving heavy objects on rooftops
OwnerMarco Belangerinventor
Life of this patent
Estimating the term…
Abstract
A lifting rig for moving heavy objects on rooftops having a framework supported by a plurality of sets of wheel assemblies. The framework has a pair of longitudinal truss assemblies wherein each truss assembly sits on top of the sets of wheel assemblies. Each of the two truss assemblies has a mast member extending upwardly to a cross beam which thus connects both truss members. Each mast member extends telescopically from an anchor post which itself extends perpendicularly from a truss member forming part of the truss assembly. From the cross beam hangs at least one chain block for raising and lowering a load; the chain block is hooked onto a means for hooking straddling over the cross beam.
Claims7
A lifting rig for moving heavy objects on a roof comprising:
- a framework supported by six wheel assemblies;
- the framework has two longitudinal truss assemblies;
- each of the two truss assemblies has a mast member extending upwardly to a cross beam, the cross beam having a first end and a second end, each of the ends of the cross beam being connected to respective distal ends of the mast members;
- each of the respective mast members from each of the two truss assemblies extends telescopically from a respective anchor post;
- each of the anchor posts extends perpendicularly from a respective one of the truss members forming part of a respective one of the truss assemblies;
- from the cross beam hangs at least one chain block for raising and lowering a load;
- the at least one chain block is hooked onto a means for hooking which straddles over the cross beam;
- each of the wheel assemblies being height adjustable by way of a respective crank;
- each of the wheel assemblies being received in a respective socket attached to the respective truss assembly, each of the truss assemblies having an additional socket not containing a respective one of the wheel assemblies;
- whereby a respective one of the wheel assemblies is removable from the respective socket containing said respective wheel assembly and inserted in the respective additional socket that did not contain a respective one of the wheel assemblies.
7 more elements
A method of moving an object on a roof using a lifting rig, comprising:
- a) providing the lifting rig, the lifting rig comprising:
- a framework supported by six wheel assemblies;
- the framework has two longitudinal truss assemblies;
- each of the two truss assemblies has a mast member extending upwardly to a cross beam, the cross beam having a first end and a second end, each of the ends of the cross beam being connected to respective distal ends of the mast members;
- each of the respective mast members from each of the two truss assemblies extends telescopically from a respective anchor post;
- each of the anchor posts extends perpendicularly from a respective one of the truss members forming part of a respective one of the truss assemblies;
- from the cross beam hangs at least one chain block for raising and lowering a load;
- the at least one chain block is hooked onto a means for hooking which straddles over the cross beam;
- each of the wheel assemblies being height adjustable by way of a respective crank;
- each of the wheel assemblies being received in a respective socket attached to the respective truss assembly, each of the truss assemblies having an additional socket not containing a respective one of the wheel assemblies;
- whereby a respective one of the wheel assemblies are removable from the respective socket containing said respective wheel assembly and inserted in the respective additional socket that did not contain a respective one of the wheel assemblies;
- b) ensuring that all the wheel assemblies have been extended so as to prepare for the lifting rig to be moved from a lower surface to a higher surface;
- c) removing one pair of the wheel assemblies from their respective wheel assemblies sockets while the remaining wheel assemblies support the rig which is moved towards the higher surface so that a first pair of the wheel assemblies sockets is positioned over the higher surface;
- d) adjusting the first set of wheel assemblies sockets to accommodate the higher surface and fitting a different set of said wheel assemblies into respective said sockets;
- e) removing a second set of said wheel assemblies their respective wheel assemblies sockets;
- f) repeating steps b)-e) with the respective remaining pairs of wheel assemblies until the entire rig is relocated on the higher surface.
13 more elements
Dependencies are inferred from the claim text.