Cutting tool
US4312127A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 17, 1980 |
| Grant date | Jan 26, 1982 |
| Priority date | — |
| Expiry date | Jun 17, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23D21/10
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A cutting tool comprising a movable blade having a ratchet wheel portion, a movable handle reciprocally movable to cause a drive pawl in engagement with the wheel portion to intermittently drive the movable blade in a cutting direction, and a retaining pawl in engagement with the wheel portion to prevent the movable blade from turning in a direction opposite to the cutting direction under the action of an elastic pulling member during the turn of the movable handle. After a workpiece supported on a receiving portion of a stationary handle has been cut, the movable handle is turned in the opposite direction slightly beyond the range of its cutting movement to disengage the pawls from the ratchet wheel portion and cause the elastic pulling member to return the movable blade to its fully opened position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.