Mark R Engel

US Patent:

45099600, Apr 9, 1985

Filed:

Oct 7, 1983

Appl. No.:

6/540121

Inventors:

Mark R. Engel - Apple Valley MN

Assignee:

Donaldson Company, Inc. - Minneapolis MN

International Classification:

B01D 4604

US Classification:

55287

Abstract:

The present invention is directed to a dust collector (100). Dust collector (100) has a housing (102) separated by partition (130) into inlet chamber (126) and clean air chamber (128). A clean air drum (140) rotatably supports columns of horizontally extending, filter elements (142). A low pressure, high volume pulse apparatus (10) is operable through blowpipe (148) to sequentially provide a low pressure reverse pulse to a column of filter elements (142) thereby separating any dust cake from them and allowing it to fall into conical portion (106) for removal from collector (100) by air lock (108). The motor (158) which rotates blowpipe (148) also disengageably rotates clean air drum (140) and attached filter elements (142) to align a column of filter elements (142) with door assembly (114) for maintenance.

US Patent:

45497150, Oct 29, 1985

Filed:

Aug 11, 1983

Appl. No.:

6/522348

Inventors:

Mark R. Engel - Apple Valley MN

Assignee:

Donaldson Company, Inc. - Minneapolis MN

International Classification:

F16K 3102

US Classification:

251 29

Abstract:

The present invention is directed to an apparatus (10) for providing a gaseous pressure pulse. Apparatus (10) includes a container (12) having an exhaust path through ports (30) and (26) of a first valve (20) when a space (32) above a ball closure element (44) is relieved of overambient pressure through ports (82) and (46) of a second valve (22) when space (84) is relieved of overambient pressure by a solenoid valve (72). The first and second valves (20,22) are structured to relieve the overambient pressure on the unsealed sides of the closure elements (44,74) rapidly thereby rapidly opening the exhaust path to create a high volume, low pressure pulse.