Wall racking tool
US4870741A · kind A · utility
Inventor
Key dates
| Filing date | Aug 2, 1988 |
| Grant date | Oct 3, 1989 |
| Priority date | — |
| Expiry date | Aug 2, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/53913
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A wall racking tool for enabling a single individual to align and plumb walls in framing construction utilizes a clamp for securement to a sill plate of an erected frame wall. A first pulley attached to the clamp body is connected to a second pulley by a rope. A jam cleat on the second pulley secures the rope in tension. The second pulley is attached to a top rail of a second erected wall. The second wall is aligned and plumbed by tensioning the rope. The clamp has a pair of parallel right angle channel side rails connected by a cross bar. Opposite ends of the cross bar are connected to the side rails for pivotal and limited longitudinal sliding movement. An axially fixed threaded rod is received for rotation within a journal bore formed through the cross bar. A traverse plate has a threaded bore engaging the threaded rod. Two pairs of levers extend from a top surface of each of the side rails. Four pivotal links secure the levers to end faces of the traverse plate. Rotation of a handle on the threaded rod causes linear movement of the traverse plate, moving the side rails into clamping engagement with the sill plate of a frame wall. The pivotal links and levers provide inward and …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.