Power shovel with variable pitch braces
US5499463A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 17, 1994 |
| Grant date | Mar 19, 1996 |
| Priority date | — |
| Expiry date | Oct 17, 2014 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02F3/425
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A power shovel comprising a frame, a dipper handle mounted on the frame for pivotal movement relative thereto about a generally horizontal dipper handle axis such that the dipper handle has a variable pivotal position relative to the frame, a dipper connected to the handle for pivotal movement relative thereto about a generally horizontal dipper axis such that the dipper has a variable pivotal position relative to the handle, and a variable pitch brace connected between the handle and the dipper at a point spaced from the dipper axis, the variable pitch brace including a spring biasing the dipper in one rotational direction relative to the handle and about the dipper axis, such that the pivotal position of the dipper automatically varies depending on the pivotal position of the handle and on external forces on the dipper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.