Ratchet and release mechanism for swing arm of table saw
US9962778B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 15, 2015 |
| Grant date | May 8, 2018 |
| Priority date | — |
| Expiry date | May 17, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB27G19/02
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A table saw includes a safety system to protect a user from injury. The safety system detects a sensed condition and rapidly moves a saw blade away from the user. The safety system includes a dual ratchet mechanism to prevent the blade from rebounding back above a work surface after an initial rapid retraction of the blade. The table saw has a swing arm that rotates to move the blade below the work surface. A first ratchet engages a first contact surface of the swing arm after rotation of the swing arm over a first range of angular displacements to prevent counter rotation of the swing arm. A second ratchet engages a second contact surface of the swing arm after rotation of the swing arm over a second range of angular displacements to prevent counter rotation of the swing arm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.