Method of making a clamping device
US4669170A · kind A · utility
Inventor
Key dates
| Filing date | Jul 3, 1986 |
| Grant date | Jun 2, 1987 |
| Priority date | — |
| Expiry date | Jul 3, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/53991
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
This invention is an improved concept of the clamp shown in U.S. Pat. No. 3,736,629, as issued June 5, 1973. This construction of a clampingdevice includes forming two C-shaped arms, each of which is an assembly of two plate-like members of sheet metal. These two arm assemblies are pivotally retained at one end with the plate-like members in an overlay condition. A pivot pin has an enlarged center portion which acts as a spacer and has two eccentric cam areas sized and spaced to actuate apertures formed in one of the arm pairs. Shouldered rivets retain these arm assemblies in spaced array and a stop pin secured in this pivot pin has a length sufficient to engage a secured rivet. At one limit of movement of the stop pin, the cam areas move one arm assembly to a maximum clamping force and, at the other limit of movement of the stop pin, the cam areas are in a reduced-force application. Trunnion blocks are pivotally retained in each arm, with one block having through threads and the other block having a smooth bore adapted to rotatably retain a socket-headed cap screw whose threaded portion is compatibly disposed in the threaded trunnion. Rotation of this screw causes jaw ends having …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.