Cam action stacked lumber clamp
US5934659A · kind A · utility
Inventor
Key dates
| Filing date | Nov 12, 1996 |
| Grant date | Aug 10, 1999 |
| Priority date | — |
| Expiry date | Nov 12, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB27M3/0053
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A clamp (200) for clamping stacked lumber (72) to prevent twisting and bending of the lumber or theft is disclosed. A horizontal member (274) goes under the lumber and is attached to a vertical member (214) at the back. A pressure bar (206) hinged to the vertical member goes on top of the lumber. When the front of the pressure bar is lowered to the top of stack, an automatic lock (222) retains the rear of the pressure bar at a fixed position on the vertical member. A brace (204) between the front of the pressure bar and the vertical member holds the pressure bar in position. The effective length of the brace is increased by means of a lever operated cam (202) which places 2000 pounds of pressure on the front of the pressure bar to clamp the stack.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.