Carl N Mortenson

US Patent:

39971821, Dec 14, 1976

Filed:

May 27, 1975

Appl. No.:

5/581212

Inventors:

Carl N. Mortenson - Midland MI

Assignee:

Magline, Inc. - Pinconning MI

International Classification:

B62B 502

US Classification:

280 4727

Abstract:

A two-wheeled hand truck or dolly structure wherein a primary frame is mounted on a pair of wheels and a generally forwardly disposed nose part is connected to project forwardly from the primary frame. The primary frame is made up of side rails connected by cross rails and one of the improvements is concerned with the shape of the side and cross rails which are configured so that they may receive elongate semi-rigid strips bearing information of an advertising or identifying character.

US Patent:

47623330, Aug 9, 1988

Filed:

Jan 5, 1987

Appl. No.:

7/000364

Inventors:

Carl N. Mortenson - Midland MI

Assignee:

Magline, Inc. - Pinconning MI

International Classification:

B62B 112

US Classification:

280 431

Abstract:

A two-wheeled hand truck incorporates an elongate upright frame, mounted by a pair of wheel support brackets to supporting wheels. Handles or other graspable surfaces are provided at the upper end of the frame. The wheel-supporting brackets are pivotally connected to the frame in a manner to permit movement of the wheels from a first load-supporting position in which the wheels are adjacent the lower end of the frame for supporting loads with a relatively lower center of gravity, to a second load-supporting position in which the wheels and axle are moved materially rearward for supporting loads with a relatively higher center of gravity. Yieldable, pressure-exerting mechanism operating through moment arms on opposite sides of the brackets pivots releasably lock the wheel structure in each of its positions.

US Patent:

52534103, Oct 19, 1993

Filed:

Nov 3, 1992

Appl. No.:

7/971519

Inventors:

Carl N. Mortenson - Midland MI

Assignee:

Magline, Inc. - Pinconning MI

International Classification:

B23P 1100
E01D 100
B65G 1112

US Classification:

29436

Abstract:

A retractable ramp is telescopable to a stowed position within a rearwardly open, longitudinally extending storage chamber within a cargo vehicle frame below a cargo carrying floor therein. It can be pulled from the vehicle, tilted downwardly so that its rear end engages the ground, and then its front end can be raised and connected to the vehicle adjacent the floor of the cargo compartment to serve as an unloading or loading platform for the vehicle floor. The ramp includes carriage arms pivotally connected to the ramp assembly near its front end and extending forwardly into the storage chamber to connect to glides which are slideable along the chamber. A force asserting, weight counterbalancing mechanism is pivotally connected between the carriage arm assembly and the ramp, and positioned to exert power to assist manual movement of the front end of the ramp from an initial position in which it is pulled from the storage chamber to a raised, operatively deployed position attached adjacent the ramp floor. The ramp is so positioned in the stowing chamber as it is being stowed, and as it is being withdrawn, that it virtually floats with respect to the walls of the storage chamber and does not generate appreciable frictional forces which add to the physical exertion required to stow and remove the ramp.

US Patent:

47905476, Dec 13, 1988

Filed:

Jul 27, 1987

Appl. No.:

7/077744

Inventors:

Carl N. Mortenson - Midland MI

Assignee:

Magline, Inc. - Pinconning MI

International Classification:

B62B 104

US Classification:

280 4727

Abstract:

An improved two-wheeled hand truck, with a pair of horizontally spaced, vertically extending side rails, connected to form a primary frame, has axle-supporting brackets fixed to the lower end of each side rail and extending rearwardly therefrom to support an axle and a pair of wheels. An angle-shaped nose plate, having a forwardly extending load support platform, and an upturned rear wall, releasably mounts a generally T-shaped pedestal part with a post which is receivable within the side rail for releasably securing each of the side rails to the forwardly extending portion of the nose plate. A second rigid connection to resist pivoting of the nose plate is provided on each wheel supporting bracket, at a spaced distance rearwardly from each side rail for fixing the upturned portion of the nose plate to each bracket.

US Patent:

51991500, Apr 6, 1993

Filed:

Apr 8, 1991

Appl. No.:

7/681977

Inventors:

Carl N. Mortenson - Midland MI

Assignee:

Magline, Inc. - Pinconning MI

International Classification:

B23P 1100
E01D 100
B65G 1112

US Classification:

29436

Abstract:

A retractable ramp is telescopable to a stowed position within a rearwardly open, longitudinally extending storage chamber within a cargo vehicle frame below a cargo carrying floor therein. It can be pulled from the vehicle, tilted downwardly so that its rear end engages the ground, and then its front end can be raised and connected to the vehicle adjacent the floor of the cargo compartment to serve as an unloading or loading platform for the vehicle floor. The ramp includes carriage arms pivotally connected to the ramp assembly near its front end and extending forwardly into the storage chamber to connect to glides which are slideable along the chamber. A force asserting, weight counterbalancing mechanism is pivotally connected between the carriage arm assembly and the ramp, and positioned to exert power to assist manual movement of the front end of the ramp from an initial position in which it is pulled from the storage chamber to a raised, operatively deployed position attached adjacent the ramp floor. The ramp is so positioned in the stowing chamber as it is being stowed, and as it is being withdrawn, that it virtually floats with respect to the walls of the storage chamber and does not generate appreciable frictional forces which add to the physical exertion required to stow and remove the ramp.

US Patent:

42758947, Jun 30, 1981

Filed:

Oct 24, 1978

Appl. No.:

5/954307

Inventors:

Carl N. Mortenson - Midland MI

Assignee:

Magline, Inc. - Pinconning MI

International Classification:

B62B 502
B62B 100

US Classification:

280 524

Abstract:

A hand truck having a wheeled upright frame is provided at its lower end with a load-supporting nose member swingable between raised and lowered positions, the nose member being biased to its raised position and provided with detent means for releasably latching the nose member in its lowered position. The nose member is pivoted to the upright frame in such manner that when the nose member is in its lowered, load-supporting position the nose member abuts and is supported by the upright frame member, thereby reinforcing the nose member without the need for external bracing. The upright frame carries an extensible and retractable sub-frame to enable the truck to be used for transporting loads of greatly varying height.

US Patent:

45630143, Jan 7, 1986

Filed:

May 17, 1983

Appl. No.:

6/494779

Inventors:

Carl N. Mortenson - Midland MI

Assignee:

Magline Inc. - Bay City MI

International Classification:

B62B 100

US Classification:

280 4718

Abstract:

A two-wheeled hand truck structure incorporates a primary frame, adapted in use to assume a vertically inclined position and having a forwardly projecting, load supporting, nose portion. The frame comprises an open framework with side rails connected by cross rails and at its upper end has a handle portion which can be grasped by the user to propel the truck. The cross rails comprise generally U-shaped plastic bars, each having a base wall portion, spaced apart opposing wall portions extending generally parallelly therefrom, and end wall portions integrally joining the base wall portion and opposing wall portions. Internal rib sections extend integrally from each base wall portion at angles one to another at spaced intervals over the length of the cross rails and integrally join with the opposing wall portions.

US Patent:

50428276, Aug 27, 1991

Filed:

Nov 6, 1989

Appl. No.:

7/431774

Inventors:

Carl N. Mortenson - Midland MI

Assignee:

Magline Inc. - Pinconning MI

International Classification:

B62B 502

US Classification:

280 522

Abstract:

A two-wheeled hand truck has a vertically inclined upright frame with a load supporting nose at its lower end. The frame is supported on a pair of wheels mounted on an axle by brackets which are pivotally connected to the frame for movement from a first load supporting position adjacent the frame to a rearward second position for supporting higher center of gravity loads. A stair climber structure is pivotal on the axle, and a link structure automatically shifts the position of the rear inclined linear surfaces of the stair climber structure to maintain them in a plane extending tangentially to the peripheries of the wheels when the brackets and wheels are moved.