Kenneth V Mattson

US Patent:

46936637, Sep 15, 1987

Filed:

Oct 5, 1984

Appl. No.:

6/658267

Inventors:

David L. Brenholt - Menomonie WI
Stephen M. Crane - Menomonie WI
Paul M. Fischer - Menomonie WI
Kenneth V. Mattson - Menomonie WI

Assignee:

Donaldson Company, Inc. - Minneapolis MN

International Classification:

B25J 906

US Classification:

414735

Abstract:

A hybrid robot (10) for industrial applications comprises an articulated arm assembly (12) pivoted to a turntable assembly (14) mounted for rotation on a base assembly (16). The arm assembly (12) includes an upper arm (26) pivoted to a lower arm (30). A tool adaptor (52) is connected to the upper arm (26) by a wrist assembly (54). A pantograph linkage interconnects the wrist assembly (54), upper arm (26), and lower arm (30) so that the tool adaptor is normally maintained in constant orientation during movement of the arm assembly (12), subject to overriding control by actuators (122, 124). Pivotal movement of the arm assembly (12) is controlled by independent actuators (118, 120) which can be selectively coupled to the arms (26, 30) at different combinations of predetermined points (38, 40, 44, 46, 48) to facilitate adjustment of the work envelope. The turntable assembly 14 is controlled by a brake assembly (202-216) responsive to an encoder (180) for positioning at the arc extremes and at least one intermediate position.

US Patent:

44848609, Nov 27, 1984

Filed:

May 17, 1982

Appl. No.:

6/379256

Inventors:

David L. Brenholt - Menomonie WI
Paul M. Fischer - Apple Valley MN
Kenneth V. Mattson - Menomonie WI

Assignee:

Donaldson Company, Inc. - MN

International Classification:

F04D 2920

US Classification:

416182

Abstract:

A radial tube centrifugal fan is disclosed. The fan is assembled from a first mating half (12) having a planar backing plate (16) with a group of half tubes (52) extending in spoke-like fashion from the plate and separated by webbing members (56), attached to a second mating half (14) having an axial inlet opening (18) and a like group of half tubes (54) and webbing members (58). The assembled fan has an inlet port (18) and a plurality of radially extending outlet tubes (26) formed from the mating half tubes and which are curved in a direction away from the preferred direction of fan rotation.