Stacking mast for a lift truck
US5082090A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 25, 1991 |
| Grant date | Jan 21, 1992 |
| Priority date | — |
| Expiry date | Feb 25, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66F9/08
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A stacking mast for being attached to a lift truck and for moving a load between a negative position and a positive position. The stacking mast includes an elongated first mast, the first mast including a lower end for being attached to the lift truck and including an upper end; an elongated second mast, the second mast including a lower end and an upper end; a floating carriage having a first securing structure for being slidably secured to the first mast and a second securing structure for being slidably secured to the second mast; a support carriage slidably attached to the second mast for supporting the load; and lift structure for moving the support carriage between a lower position and an upper position on the second mast and for moving the second mast between a lower position and an upper position on the first mast. A second embodiment is also described in which one or both of the first or second masts may telescope, allowing a reduced un-telescoped height for passing through doorways or under obstacles, while substantially preserving the full positive and negative lift.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.