Diaphragm pump for needle threading

Details Diaphragm pump for needle threading Diaphragm pump for needle threading

1978-05-22

1980-02-19

Nerbun, Peter P.

Sewing

Elements

Needles

112302, 417413, D05B 8700, F04B 1704

Patent

active

041888960

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.

REFERENCES:
patent: 2144662 (1939-01-01), Paasche
patent: 2363478 (1944-11-01), Boeke
patent: 2669937 (1954-02-01), Presentey
patent: 3515966 (1970-06-01), De Valroger et al.
patent: 3599587 (1971-08-01), Greulich
patent: 3950761 (1976-04-01), Kashio

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