Driver of staple hammer
US5941440A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1996 |
| Grant date | Aug 24, 1999 |
| Priority date | — |
| Expiry date | Dec 20, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25C5/06
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Projected portions 17, 18, 19 are formed at three positions in the middle and on left and right ends of the front surface of a driver 13 of a staple hammer. The width of the projected portion 18 in the middle is smaller than the distance between both leg portions S.sub.3, S.sub.4 of a staple S, and the projected portion 18 is not in contact with the upper surfaces of bends S.sub.1, S.sub.2 of the staple S. Further, the distance between the projected portions 17, 19 on both left and right ends is slightly smaller than the total width of the staple S. The projected portions 17, 19 are located above the bends with radii, and are not in contact with the bends. At the time of hammering, the projected portion 18 in the middle impinges the middle portion of the top surface of the staple S, allowing both leg portions S.sub.3, S.sub.4 of the staple S to ground upon the object to be hammered so as to be expanded. At the time of penetration of the leg portions, the leg portions completely penetrate into the object to be hammered with the projected portions 17, 19 on both left and right ends contacting the bends.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.