Patents Assigned to Harper Trucks, Inc.
  • Patent number: 10864933
    Abstract: A hand truck includes a frame that is supported by main wheels and a handle having two side members. Two handle brackets are pivotably mounted on opposite sides of the frame. The handle brackets are arranged for rotation in relation to the frame around a handle rotation axis. The handle brackets slidably receive the side members of the handle so that the handle is able to slide between a first retracted position and a second extended position. The handle is also able to rotate with the handle brackets between first and second rotational positions. A lock mechanism that is mechanically associated with the handle brackets and the handle is able to releasably lock the degree of extension of the handle in at least one position between the retracted and extended positions and is able to lock the rotational position of the handle in at least one rotational position.
    Type: Grant
    Filed: June 1, 2018
    Date of Patent: December 15, 2020
    Assignee: HARPER TRUCKS, INC.
    Inventor: José Angel Caceres Mendoza
  • Publication number: 20200283049
    Abstract: A hand truck with main wheels and a toe plate also includes a handle assembly that is mounted to the frame of the hand truck so that the handle assembly is able to rotate and slide relative to the truck frame. The hand truck may be arranged in a first upright dolly position in which the handle assembly is generally aligned with the truck frame and a second cart position in which the truck frame is generally horizontal and the handle assembly is extended and rotated so that it is upright and normal relative to the truck frame. A latch assembly mounted to the truck frame is able to releasably receive and secure the handle assembly in the first upright dolly position.
    Type: Application
    Filed: March 8, 2020
    Publication date: September 10, 2020
    Applicant: Harper Trucks, Inc.
    Inventor: José Angel Caceres Mendoza
  • Patent number: 10703397
    Abstract: A hand truck that includes frame assembly, wheels and a toe plate assembly. The frame assembly includes two side members and a base member extending between the lower ends of the side members. The toe plate assembly is rotatably mounted to the frame so that the toe plate is able to rotate between an operating position in which the toe portion extends forward for sliding under and lifting loads and the toe plate rests against the base member of the frame and a storage position in which the toe plate rests upon the wheel axle and an intermediate shipping position such that when the wheels are removed the hand truck may fit into a box having a minimum depth.
    Type: Grant
    Filed: February 26, 2019
    Date of Patent: July 7, 2020
    Assignee: Harper Trucks, Inc.
    Inventor: José Angel Caceres Mendoza
  • Publication number: 20180346009
    Abstract: A hand truck includes a frame that is supported by main wheels and a handle having two side members. Two handle brackets are pivotably mounted on opposite sides of the frame. The handle brackets are arranged for rotation in relation to the frame around a handle rotation axis. The handle brackets slidably receive the side members of the handle so that the handle is able to slide between a first retracted position and a second extended position. The handle is also able to rotate with the handle brackets between first and second rotational positions. A lock mechanism that is mechanically associated with the handle brackets and the handle is able to releasably lock the degree of extension of the handle in at least one position between the retracted and extended positions and is able to lock the rotational position of the handle in at least one rotational position.
    Type: Application
    Filed: June 1, 2018
    Publication date: December 6, 2018
    Applicant: Harper Trucks, Inc.
    Inventor: José Angel Caceres Mendoza
  • Patent number: 6758482
    Abstract: A multipurpose cart having a hand truck base with a nose extension, a tub, a handle wherein the handle is adjustably mounted in two positions 90 degrees apart, a shelf, caster wheels and a storage device. The multipurpose cart can be modified into various configurations for a variety of functions.
    Type: Grant
    Filed: March 27, 2002
    Date of Patent: July 6, 2004
    Assignee: Harper Trucks, Inc.
    Inventor: John J. Stallbaumer
  • Publication number: 20030062700
    Abstract: A multipurpose cart having a hand truck base with a nose extension, a tub, a handle wherein the handle is adjustably mounted in two positions 90 degrees apart, a shelf, caster wheels and a storage device. The multipurpose cart can be modified into various configurations for a variety of functions.
    Type: Application
    Filed: March 27, 2002
    Publication date: April 3, 2003
    Applicant: Harper Trucks, Inc.
    Inventor: John J. Stallbaumer
  • Patent number: 6481727
    Abstract: A hand truck toe plate formed from light gauge steel sheet having a load supporting horizontal portion and a mounting vertical portion. The horizontal portion and vertical portion are separated by a 90 degree bend and include a plurality of longitudinal ribs. The vertical portion also includes two lateral ears that each have an end defined by a notch and are adapted to be mounted to side frames of the hand truck.
    Type: Grant
    Filed: November 23, 1999
    Date of Patent: November 19, 2002
    Assignee: Harper Trucks, Inc.
    Inventor: John J. Stallbaumer
  • Patent number: 6419434
    Abstract: An adjustable length cargo brace for restraining loads in semi-trailers comprising two legs, one connected to the other for through an offset collar permitting a limited pivotal and sliding movement between the two legs, a pin member on one of the legs approximate the offset collar which releaseably engages one of a series of openings positioned longitudinally along the opposite leg to engage the two legs together in a pivotally toggled action as they move into parallel contacting relation and a releaseable hook member mounted on one of the legs for engaging and retaining the other leg in parallel contacting relation.
    Type: Grant
    Filed: May 1, 2000
    Date of Patent: July 16, 2002
    Assignee: Harper Trucks, Inc.
    Inventor: Robert D. Rahn
  • Patent number: 6308967
    Abstract: A dual position hand truck includes a central frame having two side rails and a toe plate. Positioned at an upper end of the central frame is a U-shaped handle bar which has a hand gripping portion and two extended legs with castered wheels attached at their respective bottom ends. The handle bar is pivotally attached to the frame by a fixed shaft and a pair of support brackets. The support brackets also allow the extended legs to slide along their length. Attached to the support brackets is a spring biased locking bar which locks the handle bar against rotational movement relative to the frame.
    Type: Grant
    Filed: June 2, 2000
    Date of Patent: October 30, 2001
    Assignee: Harper Trucks, Inc.
    Inventors: John J. Stallbaumer, Robert D. Rahn
  • Patent number: 5749588
    Abstract: A two-wheeled hand truck comprising a pair of side frames molded from highstrength plastic formed in an open truss with compression and tensile members. The side frames are held in a rigid parallel relationship to each other by cross rails, handles and a toe plate with integral stiffeners attached to the side frames.
    Type: Grant
    Filed: July 29, 1996
    Date of Patent: May 12, 1998
    Assignee: Harper Trucks, Inc.
    Inventor: John J. Stallbaumer
  • Patent number: 5549317
    Abstract: A foldable hand truck apparatus having 1) a main support frame assembly; 2) a support wheel assembly connected to the main support frame assembly which resembles a conventional hand truck structure; 3) an extendable handle assembly having a handle support tube which is anchored to the main support frame assembly; and 4) a dual foldable load assembly pivotally connected to the main support frame assembly. The extendable handle assembly includes a handle member telescopingly mounted within the handle support tube and movable from a compact storage position laterally of the handle support tube to a locked usage position. The dual foldable load assembly includes a luggage or large article support frame and a load support plate, both pivotally connected to a lower portion of the main support frame assembly. The load support plate is first pivotal to a position 90 degrees perpendicular to the main support frame assembly for carrying smaller loads thereon or gripping an edge portion of an article to be moved.
    Type: Grant
    Filed: October 6, 1994
    Date of Patent: August 27, 1996
    Assignee: Harper Truck, Inc
    Inventor: Gary L. Dunkle
  • Patent number: 5253881
    Abstract: A hand truck stair crawler assembly having a new and novel stair engaging crawler assembly mounted on a conventional hand truck assembly. The stair engaging crawler assembly includes a pair of spaced, cooperating stair crawler assemblies secured to the hand truck assembly, each having a main roller support assembly with a main roller assembly connected thereto. The main roller support assembly includes a pair of spaced bearing retainer plates secured by a plate connector assembly to the hand truck assembly. The main roller assembly includes a plurality of spaced roller bearings mounted within the bearing retainer plates and having an endless belt member mounted thereon for engagement with stairs for traversing thereof. The roller bearing member is of a special design having a central body portion with outer end belt retaining sections to support the endless belt member having contact and support entirely on a plurality of cooperating roller bearing members.
    Type: Grant
    Filed: August 24, 1992
    Date of Patent: October 19, 1993
    Assignee: Harper Trucks, Inc.
    Inventor: Gary L. Dunkle
  • Patent number: 4902187
    Abstract: This invention relates to a drum dolly attachment apparatus having a conventional dolly truck assembly with a drum attachment assembly of this invention connected thereto. The dolly truck assembly includes a main truck frame on a support wheel assembly which is operable to be placed adjacent and under a drum member for connecting thereto. The drum attachment assembly is slidably mounted on an upright vertical handle of the dolly truck assembly and is operable to be placed in contact and grasp a main rim portion of the drum member. The drum attachment assembly is constructed so as to move vertically as required to adjust its position on the main rim portion of the drum member when moved from a vertical to an inclined position. The drum attachment assembly includes a drum connector assembly having a first stationary drum connector connectable to an upper inner portion of the main rim portion and a second actuator drum connector connectable to an outer lower portion of the main rim portion of the drum member.
    Type: Grant
    Filed: August 29, 1988
    Date of Patent: February 20, 1990
    Assignee: Harper Truck, Inc.
    Inventor: Kenneth E. Rousseau
  • Patent number: 4860606
    Abstract: This invention relates to a ratchet apparatus adapted to be connected to a hand truck assembly in order to control movement of an article connector assembly about an article to be conveyed. The ratchet apparatus includes a ratchet housing assembly; a ratchet handle assembly connected to the ratchet housing assembly; and a ratchet actuator assembly mounted between the ratchet handle assembly and the ratchet housing assembly. The ratchet handle assembly includes a main handle assembly operable in a reciprocal rotational movement to achieve positive, controlled movement of a connector belt member. The ratchet actuator assembly includes a main actuator assembly having a ratchet dog assembly and a ratchet pawl assembly operably connected to a ratchet drive assembly.
    Type: Grant
    Filed: May 23, 1988
    Date of Patent: August 29, 1989
    Assignee: Harper Truck, Inc.
    Inventor: Kenneth E. Rousseau
  • Patent number: 4494626
    Abstract: This invention is a combination stepladder and hand truck apparatus having a ladder support frame assembly pivotally connected to an upper portion of a hand truck support frame assembly and further including a support and lock plate assembly and a wheel support assembly which are both connected to a lower portion of the hand truck support frame assembly. The ladder support frame assembly includes a basic support frame with a support handle member at one end portion thereof and interconnected by axially spaced support step assembly. The support step assembly includes a lock or latch step member which is operable to support a user thereon and conjointly locks with the hand truck support frame assembly in a rigid condition when in the stepladder usage condition. The support and lock plate assembly includes a support plate member which is pivotally mounted on a support shaft member which, in turn, is secured across a lower portion of the hand truck support frame assembly.
    Type: Grant
    Filed: November 12, 1982
    Date of Patent: January 22, 1985
    Assignee: Harper, Truck, Inc.
    Inventor: Dale A. Ast
  • Patent number: 4433816
    Abstract: The wire guide and retainer assembly of this invention is utilized with a wire dispenser stand assembly to dispense a wire strand member from the reel members mounted on a support assembly. The wire guide and retainer assembly includes (1) a first wire guide assembly; and (2) a second wire guide assembly. The first wire guide assembly includes a first frame support assembly secured to the support assembly; and a first pulley assembly mounted on said first frame support assembly. The first frame support assembly includes a pair of support arms having one end pivotally connected to the support assembly and a support shaft mounted between the support arms. The first pulley assembly is rotatably mounted on the support shaft and axially movable thereon. The second wire guide assembly is substantially identical to the first wire assembly with a second pulley assembly mounted on a support shaft member.
    Type: Grant
    Filed: April 12, 1982
    Date of Patent: February 28, 1984
    Assignee: Harper Trucks, Inc.
    Inventor: Kenneth E. Rousseau
  • Patent number: D278373
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: April 9, 1985
    Assignee: Harper Truck, Inc.
    Inventor: Kenneth E. Rousseau
  • Patent number: D354601
    Type: Grant
    Filed: August 2, 1993
    Date of Patent: January 17, 1995
    Assignee: Harper Trucks, Inc.
    Inventor: Gary L. Dunkle
  • Patent number: D384467
    Type: Grant
    Filed: June 28, 1996
    Date of Patent: September 30, 1997
    Assignee: Harper Trucks, Inc.
    Inventor: John J. Stallbaumer
  • Patent number: D395105
    Type: Grant
    Filed: February 28, 1997
    Date of Patent: June 9, 1998
    Assignee: Harper Trucks, Inc.
    Inventor: John J. Stallbaumer