Lift assembly and system
OwnerVan Stokesinventor
Life of this patent
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Abstract
A portable, lightweight lift system employing one or more lift assemblies that counters effects of staging is disclosed. The lift system includes multiple lift assemblies, wherein each assembly may be connected to a lifting device such as a hydraulic or motorized jack. A lifting device comprises moving parts which are nested such that the difference in diameters of each of the moving parts is minimized. In one aspect, the lifting device is provided with an arrangement of seals such that, the working area of a smaller diameter tube is greater than the working area of a larger diameter tube causing the smaller tube to move before the larger tube.
Claims16
A lightweight, portable lift system for lifting a shipping container, comprising:
- at least one portable lifting assembly comprising a lifting device engagement member comprising a vertical member comprising a bushing disposed proximal one end of the vertical member and at least one collar disposed distal of the bushing closer to another end of the vertical member, wherein the lifting device engagement member is releasably engageable to a portable lifting device, and a connecting member removably attachable to a shipping container to be lifted;
- and
- the portable lifting device selected from a hydraulic jack and a motorized jack releasably engageable to the bushing and the collar of the lifting device engagement member, the portable lifting device comprising a base end and an opposite end wherein the opposite end is removably insertable in the bushing and the bushing is operable to bear lifting force from the portable lifting device.
A portable lifting assembly for lifting a shipping container, comprising:
- a lifting device engagement member comprising a vertical member comprising a bushing disposed proximal one end of the vertical member and at least one collar disposed distal of the bushing closer to another end of the vertical member, wherein the lifting device engagement member is releasably engageable to a first end of a portable lifting device comprising a first end and an opposite base end, the portable lifting device selected from a hydraulic jack and a motorized jack, wherein the first end is removably insertable in the bushing and the bushing is operable to bear lifting force from the portable lifting device and the collar is operable to releasably engage the portable lifting device;
- a connecting member for removably engaging the shipping container;
- and
- at least one means connecting the lifting device engagement member to the connecting member.
Dependencies are inferred from the claim text.