Blade guard arrangement in motor-driven chop saw
US4774866A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 1988 |
| Grant date | Oct 4, 1988 |
| Priority date | — |
| Expiry date | Jan 7, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/7788
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A saw-blade guard arrangement in a motor driven chop saw which includes a new unit pivotally mounted for movement between an upper rest position and a lower operational position. The saw unit is pivotably connected to a hinging member through a pivot shaft, and the unit includes an upper safety guard, a motor casing integral with the upper guard, a saw blade fixed to a drive shaft connected to a motor shaft, and a lower guard rotatable to a first direction for covering a part of the saw blade when the saw unit is in the upper rest position and rotatable to a second direction when the unit is moved to the lower operational position. The blade guard arrangement comprises a first biasing means disposed between the upper safety guard and the hinging member, an operation arm having one end portion pivotally rotatable about the pivot shaft, a link member having one end pivotably connected to the other end of the operation arm and having the other end pivotally connected to the lower guard, a second biasing means disposed between the operation arm and the hinging member, and an adjusting means for controlling orientation of the operation arm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.