Diaphragm pump using duckbill and other types of valves

摘要

OF THE INVENTION A diaphragm pump (300) is provided that features a valve housing (200) configured with inlet openings and outlet openings; inlet duckbill check valve assemblies (1Oin), each configured to be arranged in a respective inlet opening; and outlet duckbill check valve assemblies (10out), each configured to be arranged in a respective outlet opening; each duckbill check valve assembly (10) comprising: a duckbill check valve seat (12) configured with an end (20) having a slit (22) to open to provide the fluid and particulate, and to close to prevent the backflow of the fluid and particulate; and a duckbill check valve support (14) having a base portion (18) configured to be inserted inside the duckbill check valve seat (12), and having a W-shaped portion (32) configured with an opening (34) to pass the fluid and particulate through the duckbill check valve support (14) to the duckbill check valve seat (12) and also configured to provide support for walls of the duckbill check valve seat (12) in response to back pressure caused by the fluid and particulate. 18a 12 32a 32a1 32b 32b 34 32c 32a2 32 32ca 30a 32d2 32d ""3 14 32d, 30 30b FIG. /a : Exploded view of duckbill check valve assembly 16a 16b 18d 12 1 8c 18b '1 8a 30b 18f 18e FIG. 1 : Cross-section of duckbill check valve assembly