Tool free bolt system for a saw blade
US10549449B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 17, 2014 |
| Grant date | Feb 4, 2020 |
| Priority date | — |
| Expiry date | Jun 16, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB27B5/30
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A bolt assembly (100) enables a user to change a circular blade (160) on a power tool (200) without the use of tools. The bolt assembly includes a bolt body (110) that has a bolt head (132) and a shank (136) that extends axially from the bolt head. The bolt head has a shoulder and the shank has external threads that mate with a threaded bore (220) of a drive shaft (212) of the power tool. A grip body (130) is formed circumferentially around the bolt head to facilitate rotation of the bolt body by the user's hand. An upper washer (114), a needle roller thrust bearing (116), and a lower washer (118) are positioned on the bolt head and retained with a retaining clip (120). The bolt body is rotated to press the lower washer against a clamping surface of the circular blade. The bolt assembly permits rotation of the lower washer relative to the bolt body without rotating the bold body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.