Patents by Inventor Michael R. MARK

Michael R. MARK 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: 11685540
    Abstract: Methods and systems for method for managing a hybrid-electric powerplant (HEP) comprising a thermal engine and an electric motor are described. The method comprises transmitting a thermal power command to the thermal engine to generate a thermal power output; transmitting an electric power command to the electric motor to generate an electric power output; comparing the thermal power output to the thermal power command and the electric power output to the electric power command; detecting a fault when the thermal power output deviates from the thermal power command or when the electric power output deviates from the electric power command; and accommodating the fault by modulating the thermal power command in response to a deviation in the electric power output and modulating the electric power command in response to a deviation in the thermal power output.
    Type: Grant
    Filed: January 22, 2021
    Date of Patent: June 27, 2023
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventors: Michael R. Mark, Leonid Guerchkovitch
  • Publication number: 20220297846
    Abstract: A hybrid electric system for a rotorcraft can include a first thermal engine, a second thermal engine, and an electrical machine. The first thermal engine can be sized to produce a maximum first thermal engine power that is below a one-or-more-engine-inoperative (OEI) requirement power and the second thermal engine can be sized to produce a maximum second thermal engine power that is below the OEI requirement power. The electrical machine can be sized to provide at least a remaining power needed to reach the OEI requirement power in an OEI state.
    Type: Application
    Filed: March 19, 2021
    Publication date: September 22, 2022
    Applicant: Pratt & Whitney Canada Corp.
    Inventors: Michael R. Mark, Leonid Guerchkovitch
  • Publication number: 20220234748
    Abstract: Methods and systems for method for managing a hybrid-electric powerplant (HEP) comprising a thermal engine and an electric motor are described. The method comprises transmitting a thermal power command to the thermal engine to generate a thermal power output; transmitting an electric power command to the electric motor to generate an electric power output; comparing the thermal power output to the thermal power command and the electric power output to the electric power command; detecting a fault when the thermal power output deviates from the thermal power command or when the electric power output deviates from the electric power command; and accommodating the fault by modulating the thermal power command in response to a deviation in the electric power output and modulating the electric power command in response to a deviation in the thermal power output.
    Type: Application
    Filed: January 22, 2021
    Publication date: July 28, 2022
    Inventors: Michael R. MARK, Leonid GUERCHKOVITCH
  • Patent number: 4740176
    Abstract: An electrical connector has male and female housing halves each of which has front and rear housing portions. The rear housing portion has an externally threaded front end, a stop shoulder at the rear extent of the threads and a hole to receive a latch pin. The front housing portion has internal threads at the rear end to engage the threads on the rear housing portion and also has an end face with a recess. The latch pin penetrates the rear housing near the stop shoulder and has a nonsymmetrical head. The latch pin can be rotated between a position in which the head protrudes beyond the stop shoulder and a position in which it does not protrude beyond the stop shoulder. When fully threaded together, the recess is aligned with the latch pin which can be rotated to its latching, protruding position to prevent unthreading of the housing portions.
    Type: Grant
    Filed: March 25, 1987
    Date of Patent: April 26, 1988
    Assignee: Hubbell Incorporated
    Inventors: Michael R. Marks, Alfred L. Ehrenfels
  • Patent number: 4736999
    Abstract: A connector for high current use includes a plug half and a receptacle half. The plug half includes a sleeve which receives a blade holder and a contact holder. The sleeve is provided with notches having predetermined angular positions and widths. The blade and contact holders also include notches which are mated with those of the sleeve. A plurality of sleeves having a variety of notch widths and positions can be provided to define a selection of connectors for various electrical circumstances. Blade and contact holders with a variety of sets of key positions and widths are provided to match the sleeves and to have the necessary electrical characteristics.
    Type: Grant
    Filed: March 25, 1987
    Date of Patent: April 12, 1988
    Assignee: Hubbell Incorporated
    Inventors: Michael R. Marks, Alfred L. Ehrenfels
  • Patent number: 4381879
    Abstract: A weatherproof housing and rotatable cover have radial lugs which are engaged when the cover is closed in a specific position and rotated clockwise. The cover is hingedly attached to the housing by a J-shaped arm and the cover has a skirt, one surface of which faces walls formed on the arm. The skirt has cam and stop surfaces defining a recess which engages a wall on the arm in the specific position, acting as a detent to inhibit rotational movement of the cover when it is open. Limited tilting movement of the cover is permitted by a sinuous spring in the mounting of the cover on the arm. A stop pin on the skirt prevents the cover from being rotated by 180.degree..
    Type: Grant
    Filed: February 25, 1981
    Date of Patent: May 3, 1983
    Assignee: Harvey Hubbell Incorporated
    Inventors: Alfred L. Ehrenfels, Michael R. Marks
  • Patent number: 4361252
    Abstract: A wiring device with a pivotable and rotatable cover wherein the cover has a seal which is movable relative to the cover. The seal includes a resilient ring or disk carried by a stiff supporting disk loosely retained in the cover. When the cover is closed and rotated to tighten the cover on the device, the seal frictionally engages the mouth of the device and the cover rotates relative to the seal, avoiding damage to the seal.
    Type: Grant
    Filed: July 23, 1981
    Date of Patent: November 30, 1982
    Assignee: Harvey Hubbell Incorporated
    Inventors: Richard I. Black, Alfred L. Ehrenfels, Michael R. Marks
  • Patent number: 3992779
    Abstract: A brake for quickly stopping the cutting chain of a chain saw in the event of a kickback or other mishap comprises a narrow band of spring steel which wraps at least 11/4 turns around the drum of the centrifugal clutch by which the chain is driven. One end of the band is anchored while the other end is connected to an operating lever which is rotatable between a released position in which the brake band is released from the drum and an applied position in which the brake band is applied to the drum. The operating lever has a peripheral portion which has an interfering engagement with a cooperating portion on a rotatable actuating lever to which a guard or other sensing member is connected. By reason of this interfering engagement the operating lever remains in one or the other of its positions until forcibly moved to the other position by the guard member operating through the actuating lever.
    Type: Grant
    Filed: May 19, 1975
    Date of Patent: November 23, 1976
    Assignee: Textron, Inc.
    Inventors: Michael R. Marks, James P. Strickland, Jr.