Hacksaw with improved blade tension mechanism
US5768788A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 12, 1996 |
| Grant date | Jun 23, 1998 |
| Priority date | — |
| Expiry date | Aug 12, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23D51/125
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A hacksaw includes a blade tensioning mechanism attached to the lower portion of the handle and connected to the blade through a blade holder. The end of the blade holder is observed via a tension indicator window at the lower portion of the handle, and the handle has respective predetermined indicia adjacent to the tension indicator window for alignment with the end of the blade holder. The blade tension mechanism includes an adjusting screw threadingly engaging the blade holder, and a crank handle mechanically engaging the adjusting screw for adjusting the tension of the blade. At the desired blade tensioning, the crank handle is mechanically disconnected from the adjusting screw and fits closely in the recess underneath the lower portion of the handle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.