Gerald L Pierson

US Patent:

44297823, Feb 7, 1984

Filed:

Oct 16, 1981

Appl. No.:

6/312274

Inventors:

Gerald R. Pierson - Bloomington MN

Assignee:

McQuay-Perfex Inc. - Minneapolis MN

International Classification:

B65G 3326

US Classification:

198677

Abstract:

An improved screw conveyer with removable flighting includes a rigid helicoid flighting (1) having a passage along its axis defined by the inner edges of the flighting for receiving a shaft (10). The shaft is removably received within the passageway of the flighting, and complementary coupling means associated respectively with the flighting and the shaft cause rotation of the flighting when the shaft is rotated in the first direction, and permit removal of the shaft from the flighting when the shaft is rotated in the opposite direction. In the preferred embodiment, the complementary couplings include a reverse bend (6) in the end of the flighting, and a stop member in the form of a gapped annular washer (12) secured to the shaft. The shaft may be rotated to thread itself into the flighting with the flighting passing through the gap until the reversed bend is encountered, at which point further rotation causes rotation of the flighting. Rotation in the opposite direction resulting unthreading and removal of the shaft.