Expansible chamber devices – Collapsible chamber wall portion – Wall portion formed of flexible material
Patent
1996-03-20
1997-12-23
Denion, Thomas E.
Expansible chamber devices
Collapsible chamber wall portion
Wall portion formed of flexible material
92 96, 92103R, F01B 1900
Patent
active
056997175
ABSTRACT:
A diaphragm pump (1) has a shaped diaphragm (2) of elastic material. The central zone (3) of the diaphragm (2) is thickened in the direction of stroke and is surrounded by a flexible annular zone (5) held on the pump case by an external clamping edge (6). The central zone (3) of the diaphragm (2) is engaged by a connecting rod (11) with which the shaped diaphragm (2) is displaceable from a top to a bottom dead-centre position and vice versa. Radial ribs (19) as well as stabilizing ribs (19) extending in the circumferential direction are arranged on the underside (17) of the annular zone (5). Therefore a shaped diaphragm (2) is obtained which in the annular zone (5) is flexible about a circumferential line, but which nevertheless exhibits comparatively high flexural strength about a diametral line. Deformation of the shaped diaphragm (2) under vacuum is thereby reduced.
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patent: 3911796 (1975-10-01), Hull et al.
patent: 4270441 (1981-06-01), Tuck, Jr.
patent: 5335584 (1994-08-01), Baird
Denion Thomas E.
KNF Neuberger GmbH
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