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Mast lift machine

a lift machine and mast technology, applied in the field of personnel lifts, can solve the problems of cumbersome and difficult maneuverability of existing ladders, limited work area of users, and difficulty in maneuvering conventional ladders, and achieve the effect of convenient transportation and operability and stable structur

Inactive Publication Date: 2007-06-07
JLG IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is a mast lift that is easy to transport and operate by a single user, with a machine weight of less than 200 lbs. The work platform has side protection and is supported at two positions, making it more stable. The lift system raises and lowers the work platform on the mast. The machine is standalone and can be powered by a battery or an electric power unit. The mast lift can also be used with a plurality of independent components. The technical effects of the invention include a stable and safe work platform that is easily transported and operated by a single user.

Problems solved by technology

Existing ladders, however, can be cumbersome and difficult to maneuver.
Additionally, conventional ladders can be unstable particularly on uneven ground, and a work area is limited to the user's reach.
Ladder companies are reluctant to develop powered mechanical products.
Existing mast climbers, however, are not portable or operable by a single user due to their size.
These machines are also typically too large for portability, have minimum SWL loads of 1000 lb, and are very far from the many advantages provided by a ladder in terms of portability, low cost and ease of use.

Method used

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Examples

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Embodiment Construction

[0034] With reference to FIGS. 1-5, a first embodiment of a mast lift according to the present invention is shown. The lift 10 includes a telescoping mast 12, a detachable work platform 14 movably secured to the mast 12, and a lift system 16 acting between the work platform 14 and the mast 12 to raise and lower the work platform 14 on the mast 12.

[0035] The mast 12 is supportable in two configurations by a stand 18. The stand 18 includes a pair of retractable supporting legs 20, a pair of transport wheels 22, and a pair of traversing wheels 24. In the transport position, the legs 20 are retracted, and positioning of the mast lift 10 can be performed by a single user by shifting the mast lift such that its weight rests on either set of wheels 22, 24. For example, if a user desires to shift a position of the mast lift 10 in a side-to-side direction (e.g., along a wall), with the legs 20 retracted, the mast lift 10 is tilted backward so that its weight is supported by the traversing w...

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Abstract

A portable mast lift includes a base unit having a mast and a platform lifting system. A work platform is raised and lowered on the mast of the lifting system. The mast lift is transportable and operable by a single user. In one arrangement, a machine weight of the mast lift is less than 200 lbs. Additionally, the mast lift is preferably supported in use at two support points. Multiple embodiments of the mast lift provide for varying maximum reach and load limits.

Description

CROSS-REFERENCES TO RELATED APPLICATIONS [0001] This application claims the benefit of U.S. Provisional Patent Application Ser. No. 60 / 565,524, filed Apr. 27, 2004, the entire content of which is herein incorporated by reference.STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT [0002] (NOT APPLICABLE) BACKGROUND OF THE INVENTION [0003] The present invention relates to a personnel lift and, more particularly, to a portable lift machine including a work platform raised and lowered on a mast by a lifting system. The lifting machine is transportable and operable by a single user. [0004] The ladder concept is several thousand years old. Existing ladders, however, can be cumbersome and difficult to maneuver. Additionally, conventional ladders can be unstable particularly on uneven ground, and a work area is limited to the user's reach. [0005] Ladder companies are reluctant to develop powered mechanical products. It would be desirable, however, to develop a personnel lift tha...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): E04G3/28B66F11/04B66F17/00
CPCB66F11/04B66F17/006E04G1/22
Inventor CAMPBELL, GEOFFREY GEORGEPUSZKIEWICZ, IGNACY
Owner JLG IND INC
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