Means Maintaining Platform Level On Angularly Movable Support Patents (Class 182/2.1)
  • Patent number: 9803423
    Abstract: The present invention relates to a method for controlling an articulated turntable ladder (12) of a rescue vehicle (10) wherein the ladder (12) comprises a plurality of telescopically extendable ladder parts (14) by including a tip ladder part (18) pivotable around a horizontal first pivot axis (28) by means of a first pivoting drive. The ladder further comprises a cage (22) connected to the free end of the tip ladder part (18) to be pivoted around a second pivot axis (30) by means of a second pivoting drive. The ladder (12) is pivotably mounted to a base part (16) on top of the vehicle (10) by means of a third pivoting drive to be lifted or lowered around a third pivot axis (32). The method provides for the step of controlling the first pivoting drive such that the absolute inclination angle (?) of the tip ladder part (18) is maintained constant during a lifting or lowering movement of the ladder (12) around the third pivot axis (32).
    Type: Grant
    Filed: October 15, 2014
    Date of Patent: October 31, 2017
    Assignee: IVECO MAGIRUS AG
    Inventors: Christoph Lauterjung, Jurgen Zettelmeier
  • Patent number: 9038989
    Abstract: A boom mountable robotic arm for temporarily supporting an elongate conductor includes a rigid member such as a beam or beam assembly adapted for mounting onto the upper end of a boom for example using a boom adaptor, at least one electrically insulated support post mounted to the rigid member, where each post temporarily supports an elongate electrical conductor, and at least two rotation devices for selectively controllable rotation of the rigid member and the electrically insulated support posts about at least two corresponding axes of rotation.
    Type: Grant
    Filed: November 18, 2013
    Date of Patent: May 26, 2015
    Inventors: Clifford William Devine, Daniel Neil O'Connell
  • Patent number: 8899379
    Abstract: An adjustable platform assembly for supporting workers and supplies about an elevated work site, the platform assembly being movably supported on an articulable support, the platform comprising a stationary rear bridging panel arrangement having an elongated side platform member comprising a floor and railing assembly at each end thereof, wherein each elongated side platform member floor and railing assembly is independently movable on support members forwardly, rearwardly, transversely and angularly with respect to the bridging panel arrangement, to change the platform assembly back and forth between a generally “H” shape to a generally “U” shape, or any skewed combination thereof, as required.
    Type: Grant
    Filed: February 16, 2010
    Date of Patent: December 2, 2014
    Inventor: Donald F. Lombardi
  • Patent number: 8857567
    Abstract: A powered rotating and articulating self-contained jib boom of both swing jib and non-swing jib design that attaches to mobile cranes and functions as an aerial lift when fitted with an optional work platform. Since it pins onto any existing crane by attachment to a standard swing-jib mounting system using the four pinning holes and pins located on the crane's outer most boom tip sheave head, it achieves powered leveling and rotation of a platform without having to modify or add components to the existing crane. Also, with the crane jib boom hydraulically powered for rotation in the horizontal plane up to 360-degrees and articulation in a 90-degree vertical plane, an attached work platform can be kept level during up/down articulation of the crane boom in its vertical plane. Furthermore, with dielectric insulation, the jib boom, crane boom, and attached work platform are usable on live electrical line work.
    Type: Grant
    Filed: June 14, 2013
    Date of Patent: October 14, 2014
    Inventor: Timothy James Raymond
  • Patent number: 8833519
    Abstract: A vehicle mounted telescopic boom structure including a stowable jib boom and a stowable extension boom pivotally secured thereto as well as a personnel basket which is secured to the outer end of the extension boom. When the boom structure, jib boom, extension boom and personnel basket are in their stowed position, the personnel basket is stowed on the deck of the vehicle beneath the jib boom and boom structure.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: September 16, 2014
    Assignee: Westchester Capital, LLC
    Inventors: James M. Glazer, Dean H. Smith
  • Patent number: 8684333
    Abstract: A boom mountable robotic arm for includes a beam pivotally mounted on a boom mounting adaptor, at least two electrically insulated support posts mounted to and spaced apart along the beam, and at least a first rotation coupling and a plurality of second rotation couplings. The first rotation coupling provides pivotal mounting of the beam on the boom mounting adaptor so as to provide selectively controllable rotation of the beam in a substantially vertical plane. The second rotation couplings provide selectively controllable rotation of the electrically insulated support posts about corresponding second axes of rotation between a retracted position substantially laid flush along the beam and a pick-up position ready to receive a conductor being supported. An actuated scissor linkage is mounted to the beam and the boom mounting adaptor for selectively adjusting an angular position of the beam relative to the boom mounting adaptor.
    Type: Grant
    Filed: December 9, 2011
    Date of Patent: April 1, 2014
    Assignee: Quanta Associates, L.P.
    Inventors: Clifford William Devine, Daniel Neil O'Connell
  • Publication number: 20140034418
    Abstract: The invention relates to a repair/cleaning scaffolding tower for wind turbines, having an open and closed metal structure that is semi-automatic, including a robotic arm that supports a variable shape basket, with between three and an infinite number of sides depending on requirements. The basket includes a safety device allowing the same to be removed immediately from the path of the blades. In addition to the robotic arm, the invention includes an L-shaped structural piece that supports a gangway used for maintaining the gondola. The repair/cleaning scaffolding tower includes a ring clamp with a gangway for maintaining the mast tower and several ring clamps without a gangway for stabilising the scaffolding tower.
    Type: Application
    Filed: April 14, 2011
    Publication date: February 6, 2014
    Applicant: MANTENIMIENTOS ELECTRICOS CAMPO DE AVIACION, S.L.
    Inventors: Francisco Olea Porcel, Jose Antonio Avila Espigares
  • Patent number: 8631902
    Abstract: Apparatus for elevating, laterally and rotationally positioning an aerial work platform relative to a support structure such as a mobile vehicle. In one embodiment a platform supporting carriage is mounted for sliding movement along a support beam affixed to a boom and the platform is mounted on the carriage permitting rotation of the platform about a substantially vertical axis. In a second embodiment a four bar linkage is used for longitudinally moving a rotatable platform. One or more powered means may be provided for elevating, leveling and longitudinally and rotationally positioning the work platform.
    Type: Grant
    Filed: November 11, 2009
    Date of Patent: January 21, 2014
    Assignee: California Manufacturing & Engineering Co.
    Inventor: Gary Crook
  • Patent number: 8550211
    Abstract: An aerial work assembly including components having composite materials including a fabric-reinforced resin for providing electrically non-conductive assembly, by insulating and/or isolating conductive components.
    Type: Grant
    Filed: September 23, 2008
    Date of Patent: October 8, 2013
    Assignee: Altec Industries, Inc.
    Inventors: Daniel J. Higgins, Jason Oakley, Ryan McKinney
  • Patent number: 8550212
    Abstract: An aerial work platform assembly is provided, comprising a platform shaft retaining assembly; a mounting bracket connected to the platform shaft retaining assembly; and a platform connected to the mounting bracket; wherein the platform shaft retaining assembly, mounting bracket, and platform are constructed from the same or differing composite materials comprising a fabric-reinforced resin. Optionally, the fabric-reinforced resin includes a preform fabric having a conformable three-dimensional weave, and the resin is a dielectric resin selected from either epoxy, epoxy vinyl ester, vinyl ester, polyester, or phenolic.
    Type: Grant
    Filed: April 16, 2010
    Date of Patent: October 8, 2013
    Assignee: Altec Industries
    Inventors: Daniel Higgins, Ryan McKinney, Jason Oakley
  • Patent number: 8490746
    Abstract: A safety device for an aerial lift (10) having a basket (20) with controls (23) which permit an operator to manoeuvre the basket (20), and a foot operable safety switch (24) which activates the controls (23), the safety device comprising an auxiliary safety switch (24) operated by a trip cord (27) arranged proximate to the controls (23) and which is connected in series with the foot safety switch (24) so that in the event that the cord is distorted the auxiliary switch (26) prevents activation of the control panel (23) and may additionally operate an alarm.
    Type: Grant
    Filed: February 26, 2009
    Date of Patent: July 23, 2013
    Assignee: Bluesky Solutions Limited
    Inventor: Paul Cummings
  • Patent number: 8443936
    Abstract: A self-contained and ready-to-use work platform attachment for mobile cranes, which transforms them into a state-of-the-art aerial boom lift with powered platform leveling and powered rotation up to 180-degrees. It can be supplied by the crane manufacturer with a new crane, or as an after-market attachment add-on, and may be easily pinned to the swing-jib mounting system on the outermost boom tip sheave head present on most mobile cranes without adaptive components or crane modification. In contrast, current work platforms and baskets only have gravity-leveling in association with 180-degrees of unrestricted platform rotation range, and current aerial lift boom trucks, which can function as crane booms, are not designed for add-on or after-market self-contained pin-on work platforms, instead having an integrally-designed platform with rotation and leveling powered from a base unit via hose and cable reels or carries, which are not required with the self-contained and ready-to-use work platform attachment.
    Type: Grant
    Filed: August 27, 2011
    Date of Patent: May 21, 2013
    Inventor: Timothy James Raymond
  • Publication number: 20120217089
    Abstract: A device for establishing admittance and transport of cargo to and from a wind turbine construction above ground level and having a part which can be raised and/or lowered by wires and winches located at ground level and connected with snatch blocks attached to a part so that it can be raised and/or lowered in relation to the construction. The part has a number of travelling crabs according to the numbers of winches and the travelling crabs are guided of the wires between the winches and the snatch blocks, and that the part with the travelling crabs is displaced upwards or downwards by the wires. Advantageously, the wires are used for both hoisting the part and as guide for the travelling crabs.
    Type: Application
    Filed: October 28, 2010
    Publication date: August 30, 2012
    Applicant: LIFTRA APS
    Inventor: Per E Fenger
  • Patent number: 8226069
    Abstract: A boom mountable robotic arm for temporarily supporting an elongate conductor includes a rigid member such as a beam or beam assembly adapted for mounting onto the upper end of a boom for example using a boom adaptor, at least one electrically insulated support post mounted to the rigid member, where each post temporarily supports an elongate electrical conductor, and at least two rotation devices for selectively controllable rotation of the rigid member and the electrically insulated support posts about at least two corresponding axes of rotation.
    Type: Grant
    Filed: May 16, 2007
    Date of Patent: July 24, 2012
    Assignee: Quanta Associates, L.P.
    Inventors: Clifford William Devine, Daniel Neil O'Connell
  • Patent number: 8016074
    Abstract: A platform for an aerial lift enables unobstructed access to a work area adjacent the platform. The platform includes a floor structure with front and rear sides and ends, and a safety rail disposed along at least the front side. The safety rail includes an entry gate. A lift gate is pivotably attached to the safety rail and pivotable between a closed position and an open position. The lift gate includes a gate rail extending along the rear side of the floor structure and a pair of lift rails connected between the gate rail and the safety rail. The gate rail is pivotable relative to the lift rails between an extended position and a retracted position. In this manner, the lift gate can be raised without the gate rail impacting the work surface.
    Type: Grant
    Filed: December 3, 2008
    Date of Patent: September 13, 2011
    Assignee: JLG Industries, Inc.
    Inventors: Phillip John Black, Christopher A. Haught, Ignacy Puszkiewicz
  • Patent number: 7950095
    Abstract: A gangway comprises at least one component formed from a continuous piece of metal. The at least one component formed from the continuous piece of metal may be a support structure or an underbody, a platform, a ramp, a step, or other support surface. A method for manufacturing such a gangway comprises forming the at least one component from the continuous piece of metal.
    Type: Grant
    Filed: December 8, 2008
    Date of Patent: May 31, 2011
    Assignee: Safe Rack LLC
    Inventors: Robert W. Honeycutt, Thomas A. Mefferd
  • Patent number: 7887016
    Abstract: A reinforced all terrain material and tool tray, having an articulating shelf assembly mounted on an articulating base assembly in order to improve access to construction material such as paint or tools, can be used on a roof, the ground, or on ladder, with or without the ladder shelf.
    Type: Grant
    Filed: August 23, 2007
    Date of Patent: February 15, 2011
    Inventor: Scott E. Gunsaullus
  • Publication number: 20100200328
    Abstract: The hydraulic boom system can include a boom receiving a work platform; a fixed component fixedly mountable to the vehicle; a rotary component, rotatably mounted on the fixed component about a vertical axis; a pivotal component, pivotally mounted to the rotary component about a horizontal axis, and receiving the boom; a hydraulic power unit having an electric motor driven hydraulic pump; and an electrical cable connected to the electric motor, and connectable to an electrical power supply located at a fixed position relative to the vehicle. The hydraulic power unit can be made integral to the rotary component. A raising hydraulic cylinder can extend downwardly inside a spacing in the fixed component. The electrical cable can have a coiled portion housed in the fixed component and coiled around the vertical axis.
    Type: Application
    Filed: February 6, 2009
    Publication date: August 12, 2010
    Applicant: CONCEPTION GSR INC.
    Inventors: GILLES SAVARD, NICOLAS GAUDREAULT, PIERRE GAGNON
  • Patent number: 7748496
    Abstract: An aerial work platform assembly is provided, comprising a platform shaft retaining assembly; a mounting bracket connected to the platform shaft retaining assembly; and a platform connected to the mounting bracket; wherein the platform shaft retaining assembly, mounting bracket, and platform are constructed from the same or differing composite materials comprising a fabric-reinforced resin. Optionally, the fabric-reinforced resin includes a preform fabric having a conformable three-dimensional weave, and the resin is a dielectric resin selected from either epoxy, epoxy vinyl ester, vinyl ester, polyester, or phenolic.
    Type: Grant
    Filed: February 10, 2005
    Date of Patent: July 6, 2010
    Assignee: Altec Industries, Inc.
    Inventors: Daniel Higgins, Ryan McKinney
  • Patent number: 7665582
    Abstract: The invention concerns an elevator system comprising an elevator car with a working platform arranged for carrying people or materials and which by means of the interaction between a gear wheel and gear rack can be moved along an elongated generally vertical mast constructed from a number of mast sections mounted on top of each other. To facilitate the erection, tearing down and anchoring of the mast to a nearby building structure, the moving unit comprises a passenger-carrying service and assembly platform, which, via a swing arm, is flexibly supported by the elevator car to allow a swivel action in a horizontal plane (C, D) relative to the elevator car.
    Type: Grant
    Filed: March 10, 2005
    Date of Patent: February 23, 2010
    Assignee: Alimak AB
    Inventor: Mikael Lindh
  • Publication number: 20090101435
    Abstract: An aerial work assembly including components having composite materials including a fabric-reinforced resin for providing electrically non-conductive assembly, by insulating and/or isolating conductive components.
    Type: Application
    Filed: September 23, 2008
    Publication date: April 23, 2009
    Inventor: Daniel J. Higgins
  • Patent number: 7438305
    Abstract: A tractor has a frame defined by two side rails extending longitudinally carried on ground wheels with a cab on the frame at one end and an engine compartment at the other end. The cab has doors on each side and there are provided two operator platforms each attached to the frame at a respective side with suitable ladder, guard rails and surface by which the operator can climb to the cab. Each operator platform is mounted for movement longitudinally of the frame on levers allowing movement along the side of the frame from the cab entry position to an engine service position. The platform can cover operator serviceable parts which in the cab position which are exposed when the platform is moved to the engine service position.
    Type: Grant
    Filed: December 1, 2005
    Date of Patent: October 21, 2008
    Assignee: MacDon Industries Ltd.
    Inventor: Henry Jerome Schulz
  • Publication number: 20080011542
    Abstract: A bucket tether system is described. The bucket tether system has a bucket for holding cargo and a boom for moving the bucket to a position for use. The cargo may include, for example, an individual along with the tools and material needed to perform the work. A support pin pivotally supports the bucket to the boom. A bucket actuator has a bucket end portion coupled to the bucket and a boom end portion coupled to the boom. The bucket actuator rotates the bucket and the support pin. A tether couples the boom end portion of the bucket actuator to the boom. An unintended force applied to the bucket may cause the coupling between the boom and the boom end portion of the bucket actuator to fail but avoid the failure of the coupling between the boom end portion of the bucket actuator and the boom via the tether bracket.
    Type: Application
    Filed: July 12, 2006
    Publication date: January 17, 2008
    Applicant: MFD Manufacturing, Inc.
    Inventor: Michael Dunican
  • Patent number: 7182173
    Abstract: An improved aerial work apparatus of the type having an aerial work platform attached to the distal end of a boom mounted to a mobile chassis comprising a material-handling device mounted with respect to the platform. Preferably, the material-handling device is either a dual winch device, a fork lift device, or material support feet. An aerial work platform comprising a rail support frame attached to the boom and a work basket is provided wherein the work basket can be interchanged between a basket in front of the boom and a basket positioned alongside the boom.
    Type: Grant
    Filed: June 25, 2003
    Date of Patent: February 27, 2007
    Inventor: Jeffrey H. Bailey
  • Patent number: 7004285
    Abstract: An aerial work apparatus having a boom mounted to a base, a platform attached to the distal end of the boom, a boom mechanism for positioning the platform, a boom control module mounted with respect to the platform, a vertical load-sensing mechanism mounted at the platform for measuring the platform load and generating a load signal based on that measurement and a controller operationally attached to the boom mechanism and boom control module. The controller receives the load signal and at least one position signal relating to the position of the platform and generates at least one control signal based thereon. The boom mechanism is controlled by the boom control module through the controller. Preferably, the load-sensing mechanism is held in position by a vertical holding column attached at the distal end of the boom so that the mechanism fully supports a platform support member attached to the platform.
    Type: Grant
    Filed: June 25, 2003
    Date of Patent: February 28, 2006
    Inventor: Jeffrey H. Bailey
  • Publication number: 20040262078
    Abstract: An aerial work apparatus having a boom mounted to a base, a platform attached to the distal end of the boom, a boom mechanism for positioning the platform, a boom control module mounted with respect to the platform, a vertical load-sensing mechanism mounted at the platform for measuring the platform load and generating a load signal based on that measurement, and a controller operationally attached to the boom mechanism and boom control module. The controller receives the load signal and at least one position signal relating to the position of the platform and generates at least one control signal based thereon. The boom mechanism is controlled by the boom control module through the controller. Preferably, the load-sensing mechanism is held in position by a vertical support column attached at the distal end of the boom so that the mechanism fully supports a platform support member attached to the platform.
    Type: Application
    Filed: June 25, 2003
    Publication date: December 30, 2004
    Inventor: Jeffrey H. Bailey
  • Patent number: 6823964
    Abstract: A fall arrest platform includes a platform cooperable with a lifting vehicle and having a floor, safety rails surrounding a perimeter of the floor, and an entrance gate in the side rails. A fall arrest system is integrated with the platform and includes a lanyard securable at one end to a user's harness, a lanyard connection securably receiving an opposite end of the lanyard, and mounting structure secured to the platform that supports the lanyard connection. The mounting structure movably supports the lanyard connection such that the user can move about a periphery of the platform. A compressed air accessory provides additional functionality and convenience. With this platform, a lift machine can be provided with the ability to access elevated surfaces and can also enable a safe work area outside of the machine platform.
    Type: Grant
    Filed: May 16, 2002
    Date of Patent: November 30, 2004
    Assignee: JLG Industries, Inc.
    Inventor: Alexander George Nelson Goode
  • Publication number: 20040173404
    Abstract: A wall saw accessory is provided for an aerial work platform, where a wall saw is movably affixed on a track secured to a wall to be sawed. The accessory includes a saw/track manipulator fixable to the aerial work platform. The saw/track manipulator movably supports the track and saw and enables positioning of the saw and track to and from a working position. A hydraulic power source is coupled with a water supply to provide hydraulic power and coolant flow to the wall saw. In one arrangement, the accessory additionally incorporates an onboard pressure washer, which serves to streamline the process and maintain a clean work area. The accessory may be attached to a lift vehicle including a chassis supporting an onboard water supply.
    Type: Application
    Filed: March 18, 2004
    Publication date: September 9, 2004
    Applicant: JLG Industries, Inc.
    Inventor: Korry D. Kobel
  • Patent number: 6470999
    Abstract: An ergonomic insert is disclosed that reduces the risk of low-back injury to workers in aerial buckets. A combination of an ergonomic insert, an aerial bucket and means for stabilizing said ergonomic insert within the aerial bucket is also disclosed. Finally, a method for using such an ergonomic insert is also disclosed. The ergonomic insert comprises a nominally non-deformable material having foot-receiving surfaces and capable of bearing a worker's weight. Various means for supporting the ergonomic insert in a vertical position are disclosed. The method for using the ergonomic insert comprises placing the ergonomic insert into the aerial bucket from above. The ergonomic insert is positioned between the worker and the work to be performed. The worker then places a foot on one of the foot receiving surfaces prior to or while performing the work.
    Type: Grant
    Filed: October 2, 2000
    Date of Patent: October 29, 2002
    Inventor: Philip Hart Schanzle
  • Patent number: 6464037
    Abstract: A reconfigurable work platform for an aerial work platform system includes at least one outwardly tiltable portion on which an occupant of the work platform can lean so as to extend his or her lateral reach. This is useful when the work platform itself cannot be moved closer to a desired location. An aerial work platform system using such a reconfigurable work platform, and a method for reconfiguring a work platform are also contemplated.
    Type: Grant
    Filed: December 15, 2000
    Date of Patent: October 15, 2002
    Assignee: Delta Manlift S.A.S.
    Inventors: Jean-Luc Baldas, Jean-Claude Albert
  • Publication number: 20020144862
    Abstract: A load lift comprising a lifter and a linkage on the lifter carrying a load support for movement therewith to different elevations. The linkage is a four-member linkage which includes a first vertical side member carried by the lifter, a second vertical side member carrying the load support, a third member constituting an upper member of the linkage pivotally connected to the first and second members, and a fourth member constituting a lower member of the linkage pivotally connected to the first and second members. An interconnection between the first and second members holds up the second member and load support and is thereby subject to loading on account of the load support and load thereon. Instrumentation senses the loading on the linkage indicative of the load on the load support.
    Type: Application
    Filed: February 14, 2001
    Publication date: October 10, 2002
    Inventors: David P. Engvall, Stanley R. Sumsion
  • Patent number: 6330931
    Abstract: Disclosed is a machinery operator protection system and method, which inhibits the use of machinery unless the operator of the machinery is properly secured with a lanyard and/or body harness to the machinery. The disclosed system includes a lanyard connection detector for detecting proper attachment of at least one lanyard to a machinery operator and a lanyard interlock control for controlling a switch to selectively enable activation of the machinery when the lanyard connection detector indicates that the operator is properly attached to the machinery with the lanyard. The disclosed method includes the steps of: detecting when at least one safety lanyard is properly attached to a between a machinery operator and a piece of machinery; and inhibiting operation of the machinery unless proper operator safety lanyard attachment is detected.
    Type: Grant
    Filed: September 30, 1999
    Date of Patent: December 18, 2001
    Inventors: Paul D. Baillargeon, Kevin Klughart
  • Patent number: 6250423
    Abstract: A mobile lifting platform with a chassis and supports for a platform. Mounted on the platform is a first live ring whose vertical axis is approximately centered on the platform. The first live ring carries a horizontal boom which is pivotally movable about the axis and has an axis offset therefrom on which a second live ring is mounted which carries a swivel structure terminating in a boom, on the distal end of which a work platform or basket is mounted. The swivel structure is pivotally movable about a vertical axis of the second live ring. The swivel structure is connected to the horizontal boom in such a manner that they counterrotate.
    Type: Grant
    Filed: March 10, 2000
    Date of Patent: June 26, 2001
    Assignee: Bison Stematec Maschinenbau- und Hubarbeitsbuhnen Produktiongesellschaft mbH
    Inventor: Marius Bartsch
  • Patent number: 6170607
    Abstract: A warning system for an aerial device which provides an alarm signal when a worker on an aerial work platform is exposed to an electrical hazard. The aerial device has an insulated boom which carries the work platform on its upper end. An electrostatic charge is introduced to all conductive components near the platform. The electrostatic charge is harmless to the worker and dissipates upon contact with an energized power line or grounded object. The absence of charge is then sensed by a warning device which provides an alarm signal.
    Type: Grant
    Filed: July 1, 1998
    Date of Patent: January 9, 2001
    Assignee: Altec Industries, Inc.
    Inventors: Michael J. Freeman, William J. Baker
  • Patent number: 6170606
    Abstract: A mobile machine which carries the operator of the machine is equipped with a control which has a shape, geometry and motion analogous to that of the machine and which causes machine motion analogous to the motion imparted to the control by the operator. The analog control may be applied on mobile equipment including aerial work platforms, forklifts, front end loaders, backhoes, earth movers, bulldozers, diggers, trenchers, agricultural equipment, mining machinery, and other operator controlled vehicular equipment by tailoring the shape, geometry and motions of the control to be analogous to those of the machine being controlled.
    Type: Grant
    Filed: June 28, 1996
    Date of Patent: January 9, 2001
    Assignee: Safety Dynamicon, Inc.
    Inventor: Ernest J. Merz