Self-locking clamping device
US4721293A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 12, 1986 |
| Grant date | Jan 26, 1988 |
| Priority date | — |
| Expiry date | Aug 12, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B5/087
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A self-locking, fluid-operated, tool clamping device is disclosed. The device provides a double-acting piston formed with a camming surface intermediate its ends. The camming surface is formed with a locking angle with respect to the axis of the piston. A cylindrical clamping pin is guided within the device for movement in a direction perpendicular to the camming surface and is provided with an end surface perpendicular to such direction of movement which engages the camming surface. An output lever pivotably mounted on the device engages the clamping pin at one end and is operable to engage tooling at its other end to clamp the tooling in position. The clamping pin is cylindrical and is free to rotate about its axis so as to reduce localized wear when the device is repeatedly cycled. A spring operably positioned between the lever and the body of the device resiliently biases the lever and the clamping pin toward the release position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.