Patents by Inventor Harvey W. Janssen

Harvey W. Janssen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Power-operated torque wrench
    Patent number: 4403663
    Abstract: A power operated wrench having a drive shaft, said drive shaft being initially driven by a motor to provide initial torque, overriding clutch means for driving said shaft and drive means for applying a predetermined torque via the clutch and thereafter rotating said shaft an additional predetermined amount.
    Type: Grant
    Filed: April 13, 1981
    Date of Patent: September 13, 1983
    Assignee: Wolff Manufacturing Company
    Inventor: Harvey W. Janssen
  • Apparatus for resurfacing track links for crawler-type tractors
    Patent number: 4332996
    Abstract: Method and apparatus for resurfacing track links in crawler-type tractors. The apparatus includes a platform for supporting a track link and a car mounted on the platform which is maneuverable with respect to the platform. The apparatus further includes a welder mounted on the car for resurfacing an assembled track link.
    Type: Grant
    Filed: May 7, 1979
    Date of Patent: June 1, 1982
    Assignee: Wolff Manufacturing Co.
    Inventor: Harvey W. Janssen
  • Method and machine for rebuilding track roller assemblies
    Patent number: 4230928
    Abstract: Machine for rebuilding by welding hard metal on track roller assemblies. The machine includes a system for recirculating coolant through the assembly during a welding operation and for controlling the temperature of the coolant. The machine further includes means whereby as one roller assembly is being rebuilt, the previously welded roller assembly is cooled by the circulation of coolant.
    Type: Grant
    Filed: December 18, 1978
    Date of Patent: October 28, 1980
    Assignee: Wolff Manufacturing Company
    Inventor: Harvey W. Janssen
  • Conveyor and shoe lifting assembly for tractor tracks
    Patent number: 4167058
    Abstract: A conveyor and shoe lifting assembly for tractor tracks of the type having a chain and a plurality of ground engaging shoes or grousers. The shoe lifting assembly includes a pair of spaced rails which are moved from a first position to a second position to engage and lift the shoes off of the chain during disassembly of the track links. Thereafter, the rails are moved from the second position to the first position to replace the shoes after reassembly of the track links.
    Type: Grant
    Filed: October 31, 1977
    Date of Patent: September 11, 1979
    Assignee: Wolff Manufacturing Company
    Inventor: Harvey W. Janssen
  • Tool bar assembly for track presses
    Patent number: 4157009
    Abstract: A tool bar assembly for use in track presses which includes a tool bar, tool holders, and bushing and pin tools adapted to be removably secured to said tool holders.
    Type: Grant
    Filed: March 27, 1978
    Date of Patent: June 5, 1979
    Assignee: Wolff Manufacturing Company
    Inventor: Harvey W. Janssen