Diaphragm pump

Details Diaphragm pump Diaphragm pump

1999-02-25

2000-05-23

Lopez, F. Daniel

Expansible chamber devices

Collapsible chamber wall portion

Wall portion formed of flexible material

F01B 1902, F16J 302

Patent

active

060653892

ABSTRACT:
A diaphragm pump, especially a microdiaphragm pump, with a crank drive (1) having a connecting rod (2) and an elastic diaphragm (3) connected with the connecting rod (2) has on the back side of the diaphragm facing away from the compression chamber at least one undercut fastening opening (8) for insertion of the complementarily formed attachment end of the connecting rod. In order to be able to fix the diaphragm (3) so precisely on the connecting rod (2) that radial as well as axial forces do not move it from its position relative to the connecting rod (2), and in order that the diaphragm (3) is exposed to as little additional flexing work as possible, the connecting rod (2) is provided on its attachment end with a support surface (4) for underside support of the central diaphragm area having a bearing surface (5). One or more fastening projections (6) projecting beyond the support surface (4) of the connecting rod (2) in the axial direction of the connecting rod (2) are provided for form-locking engagement in the central diaphragm area having at least one fastening opening (8).

REFERENCES:
patent: 2287627 (1942-06-01), Malsbary et al.
patent: 2641283 (1953-06-01), Houston
patent: 3203186 (1965-08-01), Sheppard

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