Structure extendible tip shoring bar
US6698984B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Nov 15, 2002 |
| Grant date | Mar 2, 2004 |
| Priority date | — |
| Expiry date | Nov 15, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60P7/15
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An improved structure extendible tip shoring bar comprising an outer rod connected to a base enables the extension and retraction inserted inside the outer rod and base. The base having a levering handle, a safety catch, and an L-shaped linkage, wherein an anterior pawl and a posterior pawl disposed at the front extremity of the levering handle. The posterior pawl and the levering handle are rotatably coupled to the base, while the anterior and posterior pawls contact unidirectionally inclined teeth. Furthermore, a pin projects from the front aspect, with each subjected to tension from the two extremities of an encompassing arcuate spring, and the surface and spring side is against the safety catch and L-shaped linkage. Conversely, toggling the safety catch to actuate the L-shaped linkage and elevate the anterior and the posterior pawls allow the inner rod pushed inside the outer rod, achieving a more convenient operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.