Vacuum suction apparatus having negative pressure actuated vacuum generator switching mechanism
US7637548B2 · kind B2 · utility
16Cited by
6References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 19, 2007 |
| Grant date | Dec 29, 2009 |
| Priority date | — |
| Expiry date | Dec 19, 2027 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2211/89
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A switching valve is disposed between a pressure fluid supply source and an ejector in a vacuum suction apparatus. A supply port of the switching valve is connected to the pressure fluid supply source, and an outlet port of the switching valve is connected to the ejector. In addition, when suction pads attract a workpiece under suction and a negative pressure becomes constant, a valve body is displaced by a negative pressure supplied through a vacuum port to the switching valve, whereupon communication between the supply port and the outlet port is blocked.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.