Patents by Inventor Mark A. HARBOLD

Mark A. HARBOLD 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).

  • Electronically controlled hydraulic swing system
    Patent number: 10906786
    Abstract: A hydraulic circuit for use on a construction machine includes a first valve, a second valve, and at least a third valve. The second and third valve each includes at least one inlet port connected to a first outlet port of the first valve. The first outlet port of each of the second and third valves are configured to reduce a first pressure to a second pressure and/or a third pressure downstream of the second valve and the third valve, respectively. The second valve and the third valve also include at least a second outlet port connected to a reservoir tank. A hydraulic motor is connected to the first outlet port of the second valve, which operates the hydraulic motor in a first direction. The hydraulic motor also is connected to the first outlet port of the third valve, which operates the hydraulic motor in a second direction.
    Type: Grant
    Filed: January 26, 2018
    Date of Patent: February 2, 2021
    Assignee: Manitowoc Crane Companies, LLC
    Inventors: John F. Benton, Mark A. Harbold, Todd Snider, David R. Peiffer
  • ELECTRONICALLY CONTROLLED HYDRAULIC SWING SYSTEM
    Publication number: 20180148304
    Abstract: A hydraulic circuit for use on a construction machine includes a first valve, a second valve, and at least a third valve. The second and third valve each includes at least one inlet port connected to a first outlet port of the first valve. The first outlet port of each of the second and third valves are configured to reduce a first pressure to a second pressure and/or a third pressure downstream of the second valve and the third valve, respectively. The second valve and the third valve also include at least a second outlet port connected to a reservoir tank. A hydraulic motor is connected to the first outlet port of the second valve, which operates the hydraulic motor in a first direction. The hydraulic motor also is connected to the first outlet port of the third valve, which operates the hydraulic motor in a second direction.
    Type: Application
    Filed: January 26, 2018
    Publication date: May 31, 2018
    Inventors: John F. Benton, Mark A. Harbold, Todd Snider, David R. Peiffer
  • Electronically controlled hydraulic swing system
    Patent number: 9878886
    Abstract: A hydraulic circuit for use on a construction machine includes a first valve, a second valve, and at least a third valve. The second and third valve each includes at least one inlet port connected to a first outlet port of the first valve. The first outlet port of each of the second and third valves are configured to reduce a first pressure to a second pressure and/or a third pressure downstream of the second valve and the third valve, respectively. The second valve and the third valve also include at least a second outlet port connected to a reservoir tank. A hydraulic motor is connected to the first outlet port of the second valve, which operates the hydraulic motor in a first direction. The hydraulic motor also is connected to the first outlet port of the third valve, which operates the hydraulic motor in a second direction.
    Type: Grant
    Filed: March 3, 2015
    Date of Patent: January 30, 2018
    Assignee: MANITOWOC CRANE COMPANIES, LLC
    Inventors: John F. Benton, Mark A. Harbold, Todd Snider, David R. Peiffer
  • ELECTRONICALLY CONTROLLED HYDRAULIC SWING SYSTEM
    Publication number: 20170015534
    Abstract: A hydraulic circuit for use on a construction machine includes a first valve, a second valve, and at least a third valve. The second and third valve each includes at least one inlet port connected to a first outlet port of the first valve. The first outlet port of each of the second and third valves are configured to reduce a first pressure to a second pressure and/or a third pressure downstream of the second valve and the third valve, respectively. The second valve and the third valve also include at least a second outlet port connected to a reservoir tank. A hydraulic motor is connected to the first outlet port of the second valve, which operates the hydraulic motor in a first direction. The hydraulic motor also is connected to the first outlet port of the third valve, which operates the hydraulic motor in a second direction.
    Type: Application
    Filed: March 3, 2015
    Publication date: January 19, 2017
    Applicant: Manitowoc Crane Companies, LLC
    Inventors: John F. BENTON, Mark A. HARBOLD, Todd SNIDER, David R. PEIFFER