Rotary clamping apparatus
US6113086A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 31, 1997 |
| Grant date | Sep 5, 2000 |
| Priority date | — |
| Expiry date | Oct 31, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B5/062
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An annular piston (4) is inserted into a housing (1) axially movably but unrotatably. A clamp rod (9) is hermetically inserted into a through-hole (4a) of the piston (4). When the piston (4) is lowered by a clamping spring (20), a back pressure is produced in pressurized oil within a second chamber (12) formed below the piston (4). The back pressure pushes an input portion (9a) for clamping provided at a lower end of the clamp rod (9) to a stopper (23) through a bearing (24) and a transmission plate (25). The piston (4) is lowered relatively to the clamp rod (9) at a raised position, whereby the clamp rod (9) is rotated by a converting mechanism (21).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.