Clamp device
US8590878B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 5, 2010 |
| Grant date | Nov 26, 2013 |
| Priority date | — |
| Expiry date | Oct 16, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T24/44068
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A clamping apparatus has a piston inserted into a housing, a lock chamber located above the piston and a release chamber located below the piston. The clamping apparatus also has a diametrically expandable and contractible tapered sleeve attached to an annular plug portion projected upward from the housing and to be received in a tapered hole provided in a work pallet. An output rod is also inserted into a cylindrical hole of the plug portion and connected to the piston. Lock springs having compression coil springs are inserted into a plurality of spring-attachment holes formed in a recessed manner in an upper wall of the lock chamber, where the spring-attachment holes are communicatively connected to an outer surface of the housing by through holes, and pushing members are hermetically inserted into the through holes. The lock springs urge the sleeve through the pushing members with a predetermined force.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.