Patents Assigned to MHE Technologies, Inc.
  • Patent number: 7611022
    Abstract: A crane having an upper block, a lower block, a drum, and two ropes. The upper block includes an equalizer having a yoke to which the ropes are connected. The connections between the ropes and the yoke include load cells that measure the forces carried by each of the ropes. The upper block includes a fail-safe system that prevents failure of the upper block in overload conditions.
    Type: Grant
    Filed: October 10, 2007
    Date of Patent: November 3, 2009
    Assignee: MHE Technologies, Inc.
    Inventor: Steven K. Waisanen
  • Patent number: 7597050
    Abstract: A crane return system is used for returning a crane component to a home position when there is a loss of power. A crane includes a bridge with a plurality of main wheels adapted to travel along at least one rail. The crane return system includes a plurality of auxiliary drive wheels supported by the bridge, the auxiliary drive wheels movable between a first position, in which the auxiliary drive wheels are recessed from the rail, and a second position, in which the auxiliary drive wheels are in contact with the rail. When power is supplied to the crane return system the auxiliary drive wheels are in the first position. A hydraulic fluid pressure vessel stores hydraulic fluid, wherein a substantially fixed mass of hydraulic fluid is contained within the crane return system, and a hydraulic cylinder is interconnected with the auxiliary drive wheels and selectively fluidly communicates with the hydraulic fluid pressure vessel.
    Type: Grant
    Filed: August 1, 2005
    Date of Patent: October 6, 2009
    Assignee: MHE Technologies, Inc.
    Inventor: Steven K. Waisanen
  • Patent number: 7562430
    Abstract: A pin removal assembly for use with an upper block of a crane includes a sheave support and a pin support. The upper block includes a frame, a plurality of sheaves, and a removable sheave pin that defines an axis of rotation for the sheaves and supports the sheaves within the frame. The pin removal assembly includes a sheave support mountable to the frame of the upper block and a pin support mountable to the frame of the upper block. The pin support is configured to support the sheave pin when the sheave pin is removed from the upper block.
    Type: Grant
    Filed: January 10, 2005
    Date of Patent: July 21, 2009
    Assignee: MHE Technologies, Inc.
    Inventor: Steven K. Waisanen
  • Patent number: 7542680
    Abstract: A control system is used for remotely operating an apparatus powered by a main power source. The control system includes an auxiliary power source to provide power to the apparatus upon a loss of power to the main power source, and first and second light-emitting sources positioned remote of the apparatus. A first photoelectric sensor is positioned proximate the apparatus and interconnected with the apparatus and the auxiliary power source, wherein upon a loss of power to the main power source, the first photoelectric sensor receives light from the first light-emitting source and the first photoelectric sensor enables power to flow from the auxiliary power source to the apparatus.
    Type: Grant
    Filed: December 5, 2005
    Date of Patent: June 2, 2009
    Assignee: MHE Technologies, Inc.
    Inventor: Steven K. Waisanen
  • Patent number: 7517183
    Abstract: A gondola tipping system for tipping a pivotally mounted container includes a frame having a substantially horizontal beam, a trolley translatable across the beam, a winch mounted on the beam, and a lower block connectable to the pivotal container, the lower block being reeved to the trolley and winch such that rotation of the winch and translation of the trolley causes the lower block to move both vertically and horizontally.
    Type: Grant
    Filed: March 23, 2005
    Date of Patent: April 14, 2009
    Assignee: MHE Technologies, Inc.
    Inventor: Steven K. Waisanen
  • Patent number: 7499186
    Abstract: A remotely operated laser survey device for performing a runway survey on a rail system that supports a device such as an overhead crane. The survey device includes a laser assembly and a survey car. The laser assembly can include a self-leveling laser. The survey car includes an image acquisition device and can be self-propelled by a drive mechanism. Images obtained using the image acquisition device are transmitted to a remote computer for analysis. The analysis can include a centroidal analysis of the image. Deviation of the rails is compared to established standards and correction carried out if necessary. The image acquisition device can be triggered to obtain images based on movement of the survey car. The survey car can be centered on a rail of the rail system to ensure accurate results regardless of the condition of the rail.
    Type: Grant
    Filed: November 25, 2003
    Date of Patent: March 3, 2009
    Assignee: MHE Technologies, Inc.
    Inventor: Steven K. Waisanen
  • Patent number: 7367461
    Abstract: A portable jib for movably mounting to a crane girder includes a base frame configured for traveling along a girder and a support member coupled to the base frame, wherein the support member extends substantially upward from the base frame. A boom is coupled to a free end of the support member and the boom extends substantially radially outward from the support member. The base frame, the support member and the boom are assembled and mounted to the girder for use and disassembled and removed from the girder after use.
    Type: Grant
    Filed: May 3, 2006
    Date of Patent: May 6, 2008
    Assignee: MHE Technologies, Inc.
    Inventor: Steven K. Waisanen
  • Patent number: 7309059
    Abstract: A hoist apparatus (10) including a rope sensing device (14) for detecting rope fouling events. The rope sensing device (14) includes a lever arm (74) having a first end portion (74g), a second end portion (74h), and a pivot point (74j) located between the first (74g) and second (74h) end portions along the lever arm (74). The lever arm (74) is pivotably mounted to a frame (18) of the hoist apparatus for movement between a sensing position and a fouled position. A follower (78) is connected to the first end portion (74g) and positioned adjacent and spaced from a drum (30) of the hoist apparatus such that rope (38) winds on to the drum spaced from and relative to the follower (78) when the rope sensing device is in the sensing position. A switch actuator (82) is connected to the second end portion (74h) adjacent a switch (86) such that the switch is actuated to a motor stop position when a rope fouling event occurs.
    Type: Grant
    Filed: March 7, 2003
    Date of Patent: December 18, 2007
    Assignee: MHE Technologies, Inc.
    Inventor: Joseph A. Marcil
  • Patent number: 7293670
    Abstract: A crane having an upper block, a lower block, a drum, and two ropes. The upper block includes an equalizer having a yoke to which the ropes are connected. The connections between the ropes and the yoke include load cells that measure the forces carried by each of the ropes. The upper block includes a fail-safe system that prevents failure of the upper block in overload conditions.
    Type: Grant
    Filed: October 18, 2004
    Date of Patent: November 13, 2007
    Assignee: MHE Technologies, Inc.
    Inventor: Steven K. Waisanen
  • Publication number: 20060283825
    Abstract: A portable jib for movably mounting to a crane girder includes a base frame configured for traveling along a girder and a support member coupled to the base frame, wherein the support member extends substantially upward from the base frame. A boom is coupled to a free end of the support member and the boom extends substantially radially outward from the support member. The base frame, the support member and the boom are assembled and mounted to the girder for use and disassembled and removed from the girder after use.
    Type: Application
    Filed: May 3, 2006
    Publication date: December 21, 2006
    Applicant: MHE Technologies, Inc.
    Inventor: Steven Waisanen
  • Publication number: 20060243881
    Abstract: A control system is used for remotely operating an apparatus powered by a main power source. The control system includes an auxiliary power source to provide power to the apparatus upon a loss of power to the main power source, and first and second light-emitting sources positioned remote of the apparatus. A first photoelectric sensor is positioned proximate the apparatus and interconnected with the apparatus and the auxiliary power source, wherein upon a loss of power to the main power source, the first photoelectric sensor receives light from the first light-emitting source and the first photoelectric sensor enables power to flow from the auxiliary power source to the apparatus.
    Type: Application
    Filed: December 5, 2005
    Publication date: November 2, 2006
    Applicant: MHE Technologies, Inc.
    Inventor: Steven Waisanen
  • Publication number: 20060151764
    Abstract: A pin removal assembly for use with an upper block of a crane includes a sheave support and a pin support. The upper block includes a frame, a plurality of sheaves, and a removable sheave pin that defines an axis of rotation for the sheaves and supports the sheaves within the frame. The pin removal assembly includes a sheave support mountable to the frame of the upper block and a pin support mountable to the frame of the upper block. The pin support is configured to support the sheave pin when the sheave pin is removed from the upper block.
    Type: Application
    Filed: January 10, 2005
    Publication date: July 13, 2006
    Applicant: MHE Technologies, Inc.
    Inventor: Steven Waisanen
  • Patent number: 6966544
    Abstract: The invention relates to a hoist apparatus including at least one of a three-part double reeved bottom block that has the same height profile as a two-part bottom block and the same lifting capacity as a three-part bottom block that includes an integral equalizer sheave nest, a device for limiting the rotation of a hoist drum beyond a desired position, a hybrid gear box adapted for use on two different categories and/or types of hoist apparatuses through the use of an adapter plate that permits coupling of the gearbox to the hoist drum of the hoist apparatus in a plurality of configurations and an external ring gear that results in a second output torque and speed of the gearbox, a self-lubricating load braking assembly having lubrication inlet holes and lubrication outlet holes for pumping lubrication into and out of the load brake assembly, a gearbox for use on the hoist apparatus including a two-stage high gear ratio gear set and a load brake assembly, a controller configured to acquire operational data re
    Type: Grant
    Filed: October 18, 2001
    Date of Patent: November 22, 2005
    Assignee: MHE Technologies, Inc.
    Inventors: Stephen J. McCormick, Joseph M. Plasz, Mark E. Ubl, Phillip J. Bartelme, Neal W. Becker
  • Publication number: 20050211654
    Abstract: A gondola tipping system for tipping a pivotally mounted container includes a frame having a substantially horizontal beam, a trolley translatable across the beam, a winch mounted on the beam, and a lower block connectable to the pivotal container, the lower block being reeved to the trolley and winch such that rotation of the winch and translation of the trolley causes the lower block to move both vertically and horizontally.
    Type: Application
    Filed: March 23, 2005
    Publication date: September 29, 2005
    Applicant: MHE Technologies, Inc.
    Inventor: Steven Waisanen
  • Publication number: 20050173192
    Abstract: A work platform for use in performing maintenance while supported on an overhead crane. The work platform is particularly useful for performing maintenance on overhead cranes located in areas where normal lifting equipment and/or scaffolding cannot easily access the overhead crane. However, the work platform is also useful for performing maintenance on equipment and/or structures in the vicinity of overhead cranes, and on overhead cranes located in areas without accessibility problems. The work platform is hoisted for placement on support structure of the overhead crane by hoist apparatus of the overhead crane. When positioned, the work platform may be fully supported on the support structure of the overhead crane.
    Type: Application
    Filed: March 8, 2005
    Publication date: August 11, 2005
    Applicant: MHE TECHNOLOGIES, INC.
    Inventors: Steve Waisanen, Fred D'Amico, Neal Eriksson, Henry Conrady
  • Publication number: 20050111012
    Abstract: A remotely operated laser survey device for performing a runway survey on a rail system that supports a device such as an overhead crane. The survey device includes a laser assembly and a survey car. The laser assembly can include a self-leveling laser. The survey car includes an image acquisition device and can be self-propelled by a drive mechanism. Images obtained using the image acquisition device are transmitted to a remote computer for analysis. The analysis can include a centroidal analysis of the image. Deviation of the rails is compared to established standards and correction carried out if necessary. The image acquisition device can be triggered to obtain images based on movement of the survey car. The survey car can be centered on a rail of the rail system to ensure accurate results regardless of the condition of the rail.
    Type: Application
    Filed: November 25, 2003
    Publication date: May 26, 2005
    Applicant: MHE Technologies, Inc.
    Inventor: Steven Waisanen
  • Patent number: 6827334
    Abstract: A lifting arrangement for overhead traveling cranes. The lifting arrangement includes two single reeved drums that are reeved together to provide true vertical lift of a load. The lifting arrangement allows for equalization of full up and full down rope fleet angles through utilization of axially staggered dual drums and/or a bottom block with two separate sheave nests. The lifting arrangement may utilize commercially available components to reduce the overall cost of the crane when compared with other powerhouse crane designs.
    Type: Grant
    Filed: December 13, 2002
    Date of Patent: December 7, 2004
    Assignee: MHE Technologies, Inc.
    Inventors: Gary E. Volle, Ross C. Smith, Stephen J. McCormick
  • Patent number: 6720751
    Abstract: A material handling system for lifting a load and a method sensing an unstable state of the material handling system. The system includes a motor, a brake and a drive. The method includes storing a model of the motor in the drive and generating a signal in the drive. The signal has a voltage and a frequency. The method further includes providing the signal to the motor, sensing a current value of the signal, determining a modeled value based in part on the sensed current value, comparing an actual value to the modeled value to determine whether the load is stable, and generating an output that sets the brake when the load is potentially unstable.
    Type: Grant
    Filed: September 21, 2001
    Date of Patent: April 13, 2004
    Assignee: MHE Technologies, Inc.
    Inventors: Joseph M. Plasz, Mark E. Ubl
  • Patent number: 6622877
    Abstract: An overhead crane having an adjustable bearing assembly to adjust a wheel and axle of the crane in a horizontal direction in order to minimize skewing of the crane on a pair of parallel rails. A bearing retainer includes an outer surface sized to fit into an associated bore in an end truck of the crane, and an eccentric inner surface which engages the outer surface of a bearing. When the bearing retainer is rotated, the wheel and axle extending therethrough are moved in a horizontal direction. The bearing retainer includes a closed end having a surface which is engageable by a tool to allow for the rotation of the bearing retainer. A locking ring releasably fixes the bearing retainer and therefore the bearing to the frame of the crane as desired.
    Type: Grant
    Filed: June 4, 2001
    Date of Patent: September 23, 2003
    Assignee: MHE Technologies, Inc.
    Inventor: Thomas E. Plass
  • Publication number: 20030111651
    Abstract: A lifting arrangement for overhead traveling cranes. The lifting arrangement includes two single reeved drums that are reeved together to provide true vertical lift of a load. The lifting arrangement allows for equalization of full up and full down rope fleet angles through utilization of axially staggered dual drums and/or a bottom block with two separate sheave nests. The lifting arrangement may utilize commercially available components to reduce the overall cost of the crane when compared with other powerhouse crane designs.
    Type: Application
    Filed: December 13, 2002
    Publication date: June 19, 2003
    Applicant: MHE Technologies, Inc.
    Inventors: Gary E. Volle, Ross C. Smith, Stephen J. McCormick