Pallet Truck Type Patents (Class 280/43.12)
  • Publication number: 20100295261
    Abstract: A pallet jack is disclosed that comprises a left tine and a right tine. The pallet jack includes a lifting mechanism that may include an electrically powered hydraulic pump to effectuate the lifting motion. The pallet jack may also include power-driven wheels that are connected by an axle, thereby facilitating translational motion of the pallet jack. The wheels may be maximally spaced by using a maximum-length axle that is slightly longer than the width of the pallet jack body, thereby optimizing load stability.
    Type: Application
    Filed: March 18, 2010
    Publication date: November 25, 2010
    Applicant: Coca-Cola Bottling Co., United, Inc.
    Inventor: Stanley Charles Ellington
  • Patent number: 7810821
    Abstract: A pallet jack assembly includes a pallet jack having a frame assembly. An attachment includes a shell having a bottom wall and at least one side wall. The bottom wall and the at least one side wall define a storage cavity. The bottom wall is supported by the frame assembly.
    Type: Grant
    Filed: June 28, 2005
    Date of Patent: October 12, 2010
    Assignee: Vestil Manufacturing Corp.
    Inventors: Barry Trine, Robert A Link, Deryl T Webster, Matthew Clements, Ralph Trine
  • Patent number: 7770904
    Abstract: A materials handling vehicle may include a vehicle frame, a drive wheel, a first caster assembly located on the right side of the drive wheel, and a second caster assembly located on the left side of the drive wheel. A weight distribution assembly connects the first or second caster assembly to the vehicle frame and may include an adjustable preload mechanism to provide a preload force to the first or second caster assembly.
    Type: Grant
    Filed: April 13, 2006
    Date of Patent: August 10, 2010
    Assignee: NMHG Oregon, LLC
    Inventor: Gianni Passeri
  • Patent number: 7744335
    Abstract: A pallet jack with a pallet engaging fork having separate and independently movable first and second fork arms connected to independently controlled and operable first and second fork arm elevating means, for lifting a pallet loaded with a stack of items so that when the stack of items leans and is out of balance one fork arm can be elevated higher than the other to compensate and restore balance to the stack of items.
    Type: Grant
    Filed: August 30, 2004
    Date of Patent: June 29, 2010
    Inventor: Tamara Cleary
  • Patent number: 7644806
    Abstract: Low lift truck, with a load part, which has a load carrying means and is coupled with a drive part via a lift cylinder arrangement and a bar linkage for load wheels of the load carrying means, a steered drive wheel, which forms with a drive motor a drive unit, which is rotatably bearing mounted around a vertical axis by the frame of the drive part, a drawbar, pivotable in the drive part around a horizontal and a vertical axis, which is in a driving connection with the drive unit, an hydraulic power pack for the hydraulic lift cylinder arrangement, and a battery casing, connected with the load part, whereby the drive motor is a wheel hub motor and the battery casing (34) is disposed above the drive unit.
    Type: Grant
    Filed: January 9, 2007
    Date of Patent: January 12, 2010
    Assignee: Jungheinrich Aktiengesellschaft
    Inventor: Sebastian Huther
  • Patent number: 7641011
    Abstract: A pallet jack includes a frame and a pair of outwardly projecting load prongs connected to the frame. The proximal ends of the prongs are connected to a horizontal member on the rear of the frame by brackets that keep the prongs out of the frame proper. A threaded rod is mounted horizontally on the horizontal member and is threaded into the proximal end of each prong, with the two ends of the threaded rod having opposite hand threads. The threaded rod is rotated by a user turning a crank mounted on top of the frame and connected to the adjustment threaded rod by a chain drive, allowing the width between the prongs to be adjusted inwardly or outwardly.
    Type: Grant
    Filed: March 18, 2006
    Date of Patent: January 5, 2010
    Inventors: Keith Wayne Fridlington, Jr., Keith Wayne Fridlington, Sr.
  • Publication number: 20090236809
    Abstract: The present invention provides a dolly (10) having a deck (12) including a plurality of rotatable members (14) secured thereto to support the deck (12) relative to a support surface (16) and enable the dolly (10) to move on the support surface (16). Each rotatable member (14) has a skirt element (24) located adjacent thereto. The or each skirt element (24) is movable relative to the deck (12) between a first position in which each rotatable member (14) is exposed beyond the adjacent skirt element (24) to a first extent and a second position in which each rotatable member (14) is exposed beyond the adjacent skirt element (24) to a second extent. The second extent is less than the first extent. Movement of the or each skirt element (24) between the first and second positions selectively engages a brake (50) to inhibit movement of the dolly (10) relative to the support surface (16).
    Type: Application
    Filed: March 18, 2009
    Publication date: September 24, 2009
    Applicant: DS Smith Plastics Limited
    Inventors: Andrew CARVER, Peter Maple
  • Patent number: 7568708
    Abstract: A pallet truck steer wheel safety guard is provided. In combination with a steering assembly of a pallet truck, a steer wheel safety guard is disposed behind the steer wheel and defines a length parallel to the axis of rotation of the steer wheel. The safety guard defines a height perpendicular to such length, the height extending below the axis of rotation of the steer wheel. The safety guard includes a bumper, and may also include at least one strut extending from the bumper for attachment to the pallet truck.
    Type: Grant
    Filed: February 21, 2007
    Date of Patent: August 4, 2009
    Inventor: Gesualdo Vietri, Jr.
  • Patent number: 7543827
    Abstract: The present invention relates to a lifting device which comprises a frame part (1), a transversal support (3) attached to one end of the frame part and lifting arms (4) attached to the transversal support in a distance from each other, which lifting arms are removable under a load to be lifted as well as a transporting equipment (5) placed in lifting arms for moving the lifting arms on a surface. The lifting device in accordance with the invention comprises drive mechanisms (6) placed in lifting arms for driving the transporting equipment in lifting arms (4) separately and for steering the lifting arms.
    Type: Grant
    Filed: September 5, 2003
    Date of Patent: June 9, 2009
    Inventor: Hannu Mantsinen
  • Patent number: 7537222
    Abstract: The dolly-pallet of the present invention includes a load bearing deck that may be alternately supported by the retractable support skid or the wheel elements. Initial displacement of the skid during the retraction process is along an upward substantially vertical path. Once the retractable support skid is retracted such that the dolly-pallet is being supported by the wheel elements, the retractable support skid may be further displaced along an upward substantially arcuate path so as to move it away form the wheel elements, allowing them to swivel if they are so configured. In this way, the center of mass of the load is lowered vertically, thereby reducing stress on the displacement mechanism until the load is supported by the wheel elements.
    Type: Grant
    Filed: March 31, 2008
    Date of Patent: May 26, 2009
    Assignee: Polymer Logistics (Israel) Ltd.
    Inventor: Nir Hadar
  • Patent number: 7475887
    Abstract: A pallet jack having first and second turn radii includes a support frame having a first end and a second end. The support frame is positionable between a raised position and a lowered position. A main wheel connects to the support frame proximate the first end while a first extensible wheel connects to the support frame proximate the second end. The distance between the main wheel and the extensible wheel define the first turn radius when the support frame is in the raised position. A ground engaging device attaches to the support frame between the main wheel and the first extensible wheel. Positioning the support frame towards the lowered position, the ground engageable device engages the ground and the extensible wheel disengages the ground. The second turn radius is thereby defined by the distance between the main wheel and the ground engaging device, which is less than the first turn radius.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: January 13, 2009
    Assignee: Grand Steer Inc.
    Inventors: Fred O. Hartmann, Allen C. Aaseby
  • Publication number: 20080238010
    Abstract: The dolly-pallet of the present invention includes a load bearing deck that may be alternately supported by the retractable support skid or the wheel elements. Initial displacement of the skid during the retraction process is along an upward substantially vertical path. Once the retractable support skid is retracted such that the dolly-pallet is being supported by the wheel elements, the retractable support skid may be further displaced along an upward substantially arcuate path so as to move it away form the wheel elements, allowing them to swivel if they are so configured. In this way, the center of mass of the load is lowered vertically, thereby reducing stress on the displacement mechanism until the load is supported by the wheel elements.
    Type: Application
    Filed: March 31, 2008
    Publication date: October 2, 2008
    Applicant: Polymer Logistics BV
    Inventor: Nir HADAR
  • Patent number: 7427075
    Abstract: A steering device for decreasing a turning radius of a pallet jack includes a ground engaging member connected to a support member of the pallet jack between a main wheel and an extensible wheel. The load supporting member of the pallet jack is positionable between a raised position and a lowered position. A first turning radius of the pallet jack is defined by the distance between the main wheel and the extensible wheel. While the extensible wheel engages the ground when the support frame is positioned towards the raised position, positioning the support member towards the lowered position engages the ground engageable member with the ground causing the extensible wheel to disengage the ground. The main wheel and the ground engageable member then define a second turning radius which is less than the first turning radius.
    Type: Grant
    Filed: April 19, 2007
    Date of Patent: September 23, 2008
    Assignee: Grand Steer Inc.
    Inventors: Fred O. Hartmann, Allen C. Aaseby
  • Publication number: 20080197589
    Abstract: A pallet truck steer wheel safety guard is provided. In combination with a steering assembly of a pallet truck, a steer wheel safety guard is disposed behind the steer wheel and defines a length parallel to the axis of rotation of the steer wheel. The safety guard defines a height perpendicular to such length, the height extending below the axis of rotation of the steer wheel. The safety guard includes a bumper, and may also include at least one strut extending from the bumper for attachment to the pallet truck.
    Type: Application
    Filed: February 21, 2007
    Publication date: August 21, 2008
    Inventor: Gesualdo Vietri
  • Patent number: 7374184
    Abstract: A portable table for supporting a table saw. The invention itself consists, essentially, of a pair of horizontal or longitudinal struts that extend above the ground or floor and across the lower ends of the legs of the table. On one end of each of the horizontal struts are mounted a pair of wheels which are slightly above ground when the table is standing in its normal condition. Also provided are a pair of horizontally extending handles which are attached to the table just below the upper surface thereof for the purpose of tilting the table when such action is desired. Thus, the essence of the invention is a pair of wheels which are mounted to one side of the table in a non-touching relation with the ground. When the table is tilted, by lifting up on the handles, the wheels will touch the ground and permit the table to be lifted off the ground and wheeled to a convenient location.
    Type: Grant
    Filed: June 17, 2005
    Date of Patent: May 20, 2008
    Inventor: Michael W. Worthy
  • Publication number: 20080012260
    Abstract: A pallet dolly for storage and movement of merchandise. In one embodiment, a deck is provided having a plurality of wheels. A handle is movably connected to the deck and can be stored adjacent the deck. Attached to the pallet dolly is a brake assembly to prevent movement of the dolly.
    Type: Application
    Filed: July 12, 2006
    Publication date: January 17, 2008
    Inventors: Jeffrey C. Ouyang, Thomas M. Conway
  • Patent number: 7296806
    Abstract: The invention relates to a pallet truck comprising a lifting device, which is mounted on the axle of two wheels, and having a supporting frame, which is mounted on two rollers, provided with two bearers and is displaceably connected to the lifting device. The lifting device has a lifting pump mounted on a console which is placed on a support that is, in turn, mounted on the axle extending between both wheels. A rod is mounted on the lifting pump, and the lifting pump has a piston rod whose head projects upwardly out of the housing of the lifting pump. A roller is mounted at the rear end of each bearer, and the bearers are connected to one another at the front end via a crossbar. A holding frame having a socket is provided on the front end of the bearers and is mounted in an articulated manner on the head of the piston rod. A two-armed linkage is mounted on both sides of the console.
    Type: Grant
    Filed: February 20, 2003
    Date of Patent: November 20, 2007
    Assignee: Borrmann GmbH
    Inventor: Hans-Peter Borrmann
  • Publication number: 20070210542
    Abstract: An apparatus for moving a pallet having a wheeled frame supporting a lift plate. The lift plate is raised by inflation of bladders disposed beneath the lift plate and lowered by deflation of the bladders. A fluid supply system provides pressurized gas for bladder inflation. Gas operated brakes resist apparatus movement when engaged. A method of moving a pallet in which a wheeled lift plate is positioned between a surface and a pallet, bladders disposed beneath the lift plate are inflated to raise the lift plate and thereby raise the pallet off of the surface, the raised lift plate supporting the pallet is rolled to a desired location, and the lift plate is lowered by deflating the bladders until the pallet rests on the surface at the desired location. A method of delivering palletized beverages is also disclosed.
    Type: Application
    Filed: March 1, 2007
    Publication date: September 13, 2007
    Applicant: Swift Water Logistics, Inc.
    Inventor: Ronald J. Hammond
  • Patent number: 7226060
    Abstract: A steering device for decreasing a turning radius of a pallet jack includes a ground engaging member connected to a support member of the pallet jack between a main wheel and an extensible wheel. The load supporting member of the pallet jack is positionable between a raised position and a lowered position. A first turning radius of the pallet jack is defined by the distance between the main wheel and the extensible wheel. While the extensible wheel engages the ground when the support frame is positioned towards the raised position, positioning the support member towards the lowered position engages the ground engageable member with the ground causing the extensible wheel to disengage the ground. The main wheel and the ground engageable member then define a second turning radius which is less than the first turning radius.
    Type: Grant
    Filed: December 15, 2004
    Date of Patent: June 5, 2007
    Assignee: Grand Steer Inc.
    Inventors: Fred O. Hartmann, Allen C. Aaseby
  • Patent number: 7165776
    Abstract: A pallet truck is provided comprising a steerable unit; a fork carriage; a set of forks coupled to the fork carriage; and a tray non-removably coupled to one of the fork carriage and the forks. The tray is movable between a workpiece-receiving position where the tray rests on the forks and a stowed position where the tray is disengaged from the forks.
    Type: Grant
    Filed: May 17, 2004
    Date of Patent: January 23, 2007
    Assignee: Crown Equipment Corporation
    Inventors: Roger Jerome Quinlan, Jr., Eric James Hanson, Gary Lester Topp
  • Patent number: 7128188
    Abstract: A lifting truck such as a forklift truck which can be provided with a supply container which is especially easy to build. To this end, space is made on a carrier between a lifting device for the lifting platform of the forklift truck, a pump and two U-shaped guards. The supply container is arranged in this space. Since it lies there protected, there is no danger of impact-like stresses so that the supply container can be made of a relatively light-weight plastic, a feature that significantly simplifies both the production and also the assembly.
    Type: Grant
    Filed: May 27, 2004
    Date of Patent: October 31, 2006
    Assignee: Franz Kahl GmbH
    Inventor: Alwin Seidlhuber
  • Patent number: 7114906
    Abstract: A pallet jack includes a hydraulic system that allows for adjustment of the pallet-engaging portion of the jack using a mechanical adjusting system whereby a large variety of pallet sizes can be accommodated. Once the desired width is achieved, the hydraulic system is used to raise the pallet engaging portion of the pallet jack once the pallet is engaged.
    Type: Grant
    Filed: October 27, 2004
    Date of Patent: October 3, 2006
    Inventors: Chuck Baumgarner, Tracey Baumgarner
  • Patent number: 7104553
    Abstract: A dolly and a tray and dolly assembly are provided. The dolly has a floor with upper and lower surfaces and with one or more features such that when the tray floor is received on the dolly floor, the feature interlocks the tray with the dolly. One feature is a plurality of protruding members extending upwardly from the dolly floor upper surface into openings in the tray floor to interlock the tray with the dolly. Another features is the presence of dolly side wall locking portions configured to abut and mate with corresponding tray side wall bottom locking portions on the tray to interlock the dolly with the tray.
    Type: Grant
    Filed: February 22, 2005
    Date of Patent: September 12, 2006
    Assignee: Rehrig Pacific Company
    Inventor: Robert V. Gruber
  • Patent number: 7063338
    Abstract: Narrow aisle truck that on each side includes two forward extending support legs, which each leg is provided with two support wheels. The two outer support wheels are displaced somewhat to the rear in relation to the inner support wheels, and, in the corner space outside the inner support wheels in front of the outer support wheels, lateral guide wheels are arranged.
    Type: Grant
    Filed: June 3, 2003
    Date of Patent: June 20, 2006
    Assignee: BT Industries
    Inventors: Magnus Alveteg, Mikael Svensson, Rolf Carlund
  • Patent number: 6948739
    Abstract: A pallet truck has a power unit including a main casing for housing drive apparatus and a platform onto which an operator may step and ride while controlling the truck. The casing includes at least one substantially rigid wall member and an operator support pad associated with the wall member. The support pad includes a main body having first and second ribbed portions with the first portion defining a deformable pocket.
    Type: Grant
    Filed: July 22, 2003
    Date of Patent: September 27, 2005
    Assignee: Crown Equipment Corporation
    Inventors: Michael P. Gallagher, Robert J. Henshaw
  • Patent number: 6857642
    Abstract: A dolly and a tray and dolly assembly are provided. The dolly has a floor with upper and lower surfaces and with one or more features such that when the tray floor is received on the dolly floor, the feature interlocks the tray with the dolly. One feature is a plurality of protruding members extending upwardly from the dolly floor upper surface into openings in the tray floor to interlock the tray with the dolly. Another feature is the presence of dolly side wall locking portions configured to abut and mate with corresponding tray side wall bottom locking portions on the tray to interlock the dolly with the tray.
    Type: Grant
    Filed: July 17, 2003
    Date of Patent: February 22, 2005
    Assignee: Rehrig Pacific Company
    Inventor: Robert V. Gruber
  • Publication number: 20040251646
    Abstract: A base for supporting and mobilizing equipment in accordance with the invention includes a plurality of supports interconnected by bridge members, with a wheel connected to at least one of the plurality of supports to support the base and enable the mobilization thereof, and releasable fasteners connecting the supports and bridge members and being shiftable between a release position wherein a support and bridge member are movable with respect to one another and a lock position wherein the support and bridge member are fixed with respect to one another. In a preferred form, the fasteners are manually actuated lock pins spring biased to the lock position. Also, in a preferred form, each support has a wheel connected thereto with at least one wheel having a lock.
    Type: Application
    Filed: June 10, 2003
    Publication date: December 16, 2004
    Inventor: Steven Alden Erbach
  • Patent number: 6607199
    Abstract: A dolly and a tray and dolly assembly are provided. The dolly has a floor with upper and lower surfaces and with one or more features such that when the tray floor is received on the dolly floor, the feature interlocks the tray with the dolly. One feature is a plurality of protruding members extending upwardly from the dolly floor upper surface into openings in the tray floor to interlock the tray with the dolly. Another features is the presence of dolly side wall locking portions configured to abut and mate with corresponding tray side wall bottom locking portions on the tray to interlock the dolly with the tray.
    Type: Grant
    Filed: April 20, 2001
    Date of Patent: August 19, 2003
    Assignee: Rehrig Pacific Company
    Inventor: Robert V. Gruber
  • Patent number: 6540241
    Abstract: A handcart is composed of a body, a lifter and a coupler. The body has two parallel rails connected together by a crosspiece integrated at rear ends of the support boards, two front wheels respectively provided beneath front ends of the rails, and two elongated bars respectively provided beneath the rear ends of the rails. The lifter is provided at the rear end of the body. The lifter has a hydraulic bar and a handle side by side and uprightly provided at a top thereof, and a rear wheel provided thereunder. The coupler connecting the body and the lifter together is detachably and pivotally mounted between the body and the lifter. Whereby, when the coupler is damaged, it is very easy for a user to replace the coupler with a new one.
    Type: Grant
    Filed: June 19, 2001
    Date of Patent: April 1, 2003
    Inventor: Wen-Ching Lee
  • Patent number: 6530580
    Abstract: A lowerable suspension assembly for the deck of a vehicle is elevated and lowered by air springs between a travel position when the deck is horizontally disposed and a loading and unloading position when the deck is inclined and one end is in contact with a supporting ground surface.
    Type: Grant
    Filed: November 6, 2000
    Date of Patent: March 11, 2003
    Inventor: John Edward Simpson
  • Patent number: 6511080
    Abstract: A fork lift trolley includes a frame with two L-shaped members, a pair of forks mounted on the members to rise and descend thereon, a hydraulic mechanism fitted to a front of the frame, a pair of closely-spaced pivot wheels formed at a bottom of the hydraulic mechanism, and a steering handle linked to the pivot wheels. A hoist mechanism is fitted to the frame and connected to the hydraulic mechanism. The hoist mechanism is actuated by a hydraulic pump fitted below the steering handle which is pivotally raised and lowered to actuate the hydraulic pump. The handle has a heart shaped grip at a top thereof which is easily grasped by one hand of an operator, and a pressure-release trigger is mounted in the steering handle and within the grip, whereby the operator can de-actuate the hoist mechanism with the same hand holding the grip.
    Type: Grant
    Filed: February 14, 2001
    Date of Patent: January 28, 2003
    Inventor: Wen-Ching Lee
  • Publication number: 20020190489
    Abstract: A handcart is composed of a body, a lifter and a coupler. The body has two parallel rails connected together by a crosspiece integrated at rear ends of the support boards, two front wheels respectively provided beneath front ends of the rails, and two elongated bars respectively provided beneath the rear ends of the rails. The lifter is provided at the rear end of the body. The lifter has a hydraulic bar and a handle side by side and uprightly provided at a top thereof, and a rear wheel provided thereunder. The coupler connecting the body and the lifter together is detachably and pivotally mounted between the body and the lifter. Whereby, when the coupler is damaged, it is very easy for a user to replace the coupler with a new one.
    Type: Application
    Filed: June 19, 2001
    Publication date: December 19, 2002
    Inventor: Wen-Ching Lee
  • Patent number: 6491311
    Abstract: A pallet lifting and moving mechanism with a base, cam member, a removable handle and a wheel rotatingly secured to the cam member to lift the base from a support surface wherein the base supports a leading edge of an associated pallet to facilitate loading and supports a trailing edge of an associated pallet to facilitate unloading of the associated pallet from a delivery truck. The invention also contemplates a method of lifting the leading edge of the associated pallet during loading and the trailing edge of the associated pallet during unloading.
    Type: Grant
    Filed: July 20, 2000
    Date of Patent: December 10, 2002
    Assignee: Southeastern Container, Inc.
    Inventors: John D. Underwood, Randolph Scott Prause, David E. Raabe
  • Publication number: 20020109317
    Abstract: A fork lift trolley includes a frame with two L-shaped members, a pair of forks mounted on the members to rise and descend thereon, a hydraulic mechanism fitted to a front of the frame, a pair of closely-spaced pivot wheels formed at a bottom of the hydraulic mechanism, and a steering handle linked to the pivot wheels. A hoist mechanism is fitted to the frame and connected to the hydraulic mechanism. The hoist mechanism is actuated by a hydraulic pump fitted below the steering handle which is pivotally raised and lowered to actuate the hydraulic pump. The handle has a heart shaped grip at a top thereof which is easily grasped by one hand of an operator, and a pressure-release trigger is mounted in the steering handle and within the grip, whereby the operator can de-actuate the hoist mechanism with the same hand holding the grip.
    Type: Application
    Filed: February 14, 2001
    Publication date: August 15, 2002
    Inventor: Wen-Ching Lee
  • Patent number: 6402167
    Abstract: A pallet cart comprises four corner adapters that lock on to respective corners of an ordinary wooden pallet. A pair of ladder frames have vertical posts that fit at the bottom into each of the four corner adapters. The ladder frames support a system of wire-frame shelves at various parallel levels above the pallet. The pieces can be disassembled to lie flat.
    Type: Grant
    Filed: November 21, 2000
    Date of Patent: June 11, 2002
    Inventor: Michael J. Calleja
  • Patent number: 6343907
    Abstract: A low-lift fork truck including a driving part which has a driving wheel disposed on the longitudinal axle and is driven by an electric motor, which is supported in a steering bolster adapted to be pivoted about a vertical axis, and a drawbar hinged to the steering bolster and a lifting cylinder. The truck further including a load-carrying part adjustable in height to a certain extent towards the driving part which has two parallel-spaced wheel arms and a rigid transverse member interconnecting the wheel arms wherein the transverse member is adapted to be coupled to the lifting cylinder and a linkage coupled to the transverse member is joined by a hinge to a forcing bar in the wheel arms which, in turn, actuates the rocker of a load-carrying roller at the end of the wheels arms to perform a lift.
    Type: Grant
    Filed: July 24, 2000
    Date of Patent: February 5, 2002
    Assignee: Jungheinrich Aktiengesellschaft
    Inventor: Heinz Schalmath
  • Patent number: 6260646
    Abstract: A pallet truck for manually transporting loaded pallets is provided with a momentary locomotion means that assists an operator in starting a load moving from a state of rest. The locomotion subsystem is of suitable weight and size to allow the power-assisted pallet truck to be manually operated, and to allow for use of the pallet truck in similar space constraints as manual pallet trucks. In an enhanced embodiment, a governor switch is provided which disables the power-assistance after the load has been accelerated to walking speed in order to protect the motor from use as a full-time locomotion means.
    Type: Grant
    Filed: April 29, 1999
    Date of Patent: July 17, 2001
    Inventors: Raul U. Fernandez, Daniel C. Mullock
  • Patent number: 6227553
    Abstract: An attachment assembly provides a secure attachment point for the fall arrest tether lines of safety harnesses of workers on flat roofs, the assembly being movable over the roof as required. The assembly can be used alone, but usually is mounted on a wheeled utility cart as employed by roofers to move materials on the roof, or may be an integral part of such a cart. The assembly has a base frame that is spaced from the roof edge over which the worker may fall. An attachment member for tether lines is mounted on the base frame together with at least two longitudinally spaced surface engaging arm, the arms being located at the frame side nearer to the roof edge. When the assembly is in operative position each arm has its lower end, which usually has teeth, close to the roof surface. A counterweight is mounted on the opposite side of the base frame.
    Type: Grant
    Filed: March 8, 2000
    Date of Patent: May 8, 2001
    Inventor: Theodore R. Palmer