Patent · US Expired

Extensible boom lift

US4162873A · kind A · utility

31Cited by
7References
16Claims
0Family size

Inventor

Key dates

Filing dateJan 30, 1978
Grant dateJul 31, 1979
Priority date—
Expiry dateJan 30, 1998

Classification

  • Technology area (CPC E)Fixed Constructions
  • CPC primaryE02F3/3402
  • WIPO fieldHandling
  • WIPO sectorMechanical engineering

Abstract

A workpiece lift including a pivotable boom with a pivot end that moves horizontally as the load end of the boom is raised and lowered, allowing the load end to move along a substantially vertical line. In a preferred embodiment the load end of the boom terminates in a workpiece arm which supports a workpiece and which extends downwardly from the load end of the boom so that the workpiece may be lifted upwardly and outwardly in an arc.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.