David A Camp

US Patent:

7883131, Feb 8, 2011

Filed:

Oct 30, 2007

Appl. No.:

11/928949

Inventors:

David Camp - Cokato MN, US
Darin Young - Cokato MN, US

Assignee:

Machining and Welding by Olsen, Inc. - Minneapolis MN

International Classification:

B66C 1/66

US Classification:

294 8223, 294 6722, 414910

Abstract:

A crane hook assembly and methods of use for safely lifting large conduits, such as wind generator tower sections. The hook assembly includes a steel frame member and a support member forwardly extending from the front surface of the frame member. The support member cooperates with the frame member to engage and retain an annular flange of the tower section. The hook assembly is secured onto the tower section with a securing mechanism, preferably using a rack and pinion gear assembly to actuate a locking pin. The sliding, retractable, locking pin may be actuated such that it is movable between an unlocked position and a locking position, such that the locking pin is positioned horizontally over the tower section when in the locked position and the locking pin is fully retracted from the front surface when the locking pin is in the unlocked position.

US Patent:

8028436, Oct 4, 2011

Filed:

Mar 24, 2009

Appl. No.:

12/409598

Inventors:

David Camp - Cokato MN, US
Darin Young - Cokato MN, US

Assignee:

Machining and Welding by Olsen, Inc. - Minneapolis MN

International Classification:

G01B 3/10

US Classification:

33760, 33712

Abstract:

An apparatus for evaluating the condition of a lift sling. The apparatus includes a body with an upper section and a lower section. The lower section includes a cradle member with a load bearing surface that engages an inner surface of a connecting link at one end of a sling. The apparatus includes an engagement section that receives and positions the end of a measuring device so that it is in tangential alignment with the load bearing surface of the cradle member. In use, one end of a sling is positioned on the load bearing surface of the cradle member and one end of a measuring device is positioned on the engagement section of the apparatus. The apparatus is then raised so that the sling and the measuring device are hanging freely. The reach of the sling is then measuring using the measuring device.

US Patent:

20150052726, Feb 26, 2015

Filed:

Aug 22, 2013

Appl. No.:

13/973481

Inventors:

David A. Camp - Cokato MN, US
Chris R. Johnson - Cokato MN, US
Darin L. Young - Dassel MN, US

Assignee:

MACHINING & WELDING BY OLSEN, INC. - Minneapolis MN

International Classification:

F16M 11/22
B65D 19/44
B66C 1/10

US Classification:

294261, 211 131, 211 858, 294 671

Abstract:

A safety appliance for a downhaul weight. The safety appliance includes a cradle that is configured and arranged to receive support a downhaul weight in its normal working orientation. The safety appliance is capable of receiving and supporting downhaul weights having different sizes and dimensions. When a downhaul weight is seated in the cradle, the safety appliance may provide a working space therebelow. The cradle of the safety appliance may include friction reducing material that allows a downhaul weight to be manipulated while it is seated in the cradle. The safety appliance and a downhaul weight may be conveyed from one location to another location as a single unit. The safety appliance may include one or more box-beams that facilitate lifting the safety appliance from below and/or one or more lifting lugs that facilitate lifting the safety appliance from above.