Patents by Inventor Harvey W. Rockwell

Harvey W. Rockwell 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).

  • Patent number: 4267545
    Abstract: A vehicle performance sensor that monitors the operation of a vehicle and provides a shift point indicator to inform the vehicle operator when to shift the transmission. When the rotational output from the vehicle torque converter is not within the desired operating range of the transmission gearing, a signal will be generated to notify the operator by a visual indication that the transmission should be shifted and which gear should be selected.
    Type: Grant
    Filed: August 17, 1979
    Date of Patent: May 12, 1981
    Assignee: Fiat-Allis Construction Machinery, Inc.
    Inventors: Gary A. Drone, Harvey W. Rockwell
  • Patent number: 4136751
    Abstract: A power divider system with governed speed control wherein a first power path and a second power path are formed by a differential-like power divider. A control system associated with the two power paths senses and controls the speed relationship thereof. The speed of an output element of the second power path is determined and then governed to a predetermined value by modulated transfer of power from the second power path to the first power path. The speed of an output element of the first power path is limited relative to the output element of the second power path by the transfer of power from the first power path to the second power path through a one-way drive system. A power transfer mechanism for governing the second power path to the predetermined speed provides fail-safe operation.
    Type: Grant
    Filed: October 29, 1976
    Date of Patent: January 30, 1979
    Assignee: Fiat-Allis Construction Machinery, Inc.
    Inventors: Wesley A. Poore, Edward F. Randolph, Harvey W. Rockwell
  • Patent number: 4131056
    Abstract: A pilot controlled variable displacement fluid motor is disclosed wherein fluid under pressure, received from a fluid pressure source such as a closed-center type system, is convertible selectively into bi-directional rotary motion at infinitely variably controlled speeds and torques. The motor is further characterized in that a change in the positional relationship of an arcuately movable control input member with relation to the position of an arcuately movable power output member, in combination with power transfer means, is effective for adjusting the power output speed to that of the control input member. Furthermore, the torque output is automatically adjusted to the load demand, whereby only the quantity of fluid, required to satisfy the speed selection and the torque demand, at a predetermined pressure level, is used by the motor.
    Type: Grant
    Filed: December 15, 1977
    Date of Patent: December 26, 1978
    Assignee: Fiat-Allis Construction Machinery, Inc.
    Inventor: Harvey W. Rockwell
  • Patent number: 4022282
    Abstract: Apparatus and method are provided for reclaiming strip-mined land. The apparatus generally comprises a leading tractor and a trailing tractor and an elongated adjustable side casting blade angularly disposed between and connected to the tractors. Control of both tractors and blade adjustment is carried out by an operator on the leading tractor. The method generally comprises the steps of driving the apparatus along a spoil bank crest near one side thereof in one direction to make one pass to effect side casting of material down one repose slope of the spoil bank and then driving the apparatus along the spoil bank crest near the other side thereof in the opposite direction to make another pass to effect side casting of material down the other repose slope of the spoil bank. Two such passes constitute one complete cycle and blade angle; blade tilt and depth of cut are changed for each pass.
    Type: Grant
    Filed: July 21, 1976
    Date of Patent: May 10, 1977
    Assignee: Fiat-Allis Construction Machinery, Inc.
    Inventor: Harvey W. Rockwell
  • Patent number: 3994349
    Abstract: Apparatus and method are provided for reclaiming strip mined land. The apparatus generally comprises a leading tractor and a trailing tractor and an elongated adjustable side casting blade angularly disposed between and connected to the tractors. Control of both tractors and blade adjustment is carried out by an operator on the leading tractor. The method generally comprises the steps of driving the apparatus along a spoil bank crest near one side thereof in one direction to make one pass to effect side casting of material down one repose slope of the spoil bank and then driving the apparatus along the spoil bank crest near the other side thereof in the opposite direction to make another pass to effect side casting of material down the other repose slope of the spoil bank. Two such passes constitute one complete cycle and blade angle; blade tilt and depth of cut are changed for each pass.
    Type: Grant
    Filed: January 27, 1975
    Date of Patent: November 30, 1976
    Assignee: Fiat-Allis Construction Machinery, Inc.
    Inventor: Harvey W. Rockwell