Diaphragm pump for needle threading
US4188896A · kind A · utility
2Cited by
6References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 22, 1978 |
| Grant date | Feb 19, 1980 |
| Priority date | — |
| Expiry date | May 22, 1998 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD05D2207/04
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A pump is disclosed having a housing with a recess therein, an elastomeric diaphragm stretched across said recess forming a pump cavity in which the medium being pumped is circulated, and inlet and outlet valves. An electronically controlled linear actuator is attached to the diaphragm within the pump cavity thereby allowing compactness in the construction of the pump and improved heat dissipation from the linear actuator. The pump fits within the frame of a sewing machine and creates an air vacuum for assisting in needle threading.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.