Patent · US Expired

Hydraulic lift boom attachable to a tractor's draw bar and three point hitch

US6030170A · kind A · utility

6Cited by
8References
5Claims
0Family size

Inventor

Key dates

Filing dateApr 6, 1998
Grant dateFeb 29, 2000
Priority date—
Expiry dateApr 6, 2018

Classification

  • Technology area (CPC B)Performing Operations; Transporting
  • CPC primaryB66C23/44
  • WIPO fieldHandling
  • WIPO sectorMechanical engineering

Abstract

The hydraulic lift boom attachment including a support frame and a telescopic lifting arm wherein the support frame is coupled to a tractor's three point hitch which hydraulically raises or lowers the support frame. The telescopic lifting arm has one end coupled to the support frame and the other end is coupled to the tractor's draw bar via a pulley assembly to rotate such other end of the telescopic lifting arm when the support frame is hydraulically raised or lowered. Furthermore, the support frame of the hydraulic lift boom attachment includes a telescopic vertical support assembly to vary the vertical height of the telescopic lifting arm.

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