Complete swivel type backhoe vehicle
US4728251A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 18, 1987 |
| Grant date | Mar 1, 1988 |
| Priority date | — |
| Expiry date | Feb 18, 2007 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02F3/964
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A backhoe vehicle comprising an upper carriage including a driver's section and swivellable 360 degrees on a chassis, and an excavating assembly including a boom, a bucket arm and a bucket. The boom defines a first and a second bent portions so that a distal end of the boom is inclined in a direction in which the boom is lowered. An excavating assembly holder is attached to a front region of the upper carriage and adjacent a transversely mid-position of the vehicle to be pivotable on a vertical axis. The boom is connected to the holder to be pivotable on a horizontal rotary shaft. A boom cylinder for causing pivotal movements of the excavating assembly is connected at one end to the boom and at the other end selectively to a first and a second pivot members defined on the holder. The second pivot member is disposed at a lower rearward position with respect to the first pivot member. The first bent portion is defined substantially at a longitudinally mid-position of the boom, and the second bent portion is defined between the first bent portion and the rotary shaft. A distance between the rotary shaft and the second bent portion is substantially equal to a distance between the rotar…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.