Patents by Inventor Maxine C. McKenzie

Maxine C. McKenzie 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).

  • Air spring with constrained elastic sleeve
    Patent number: 10578180
    Abstract: An air spring comprises a hollow elastic sleeve, an end component for securing the air spring to a first frame, a hollow piston for securing the air spring to a second frame that is movable relative to the first frame, and a cylinder surrounding the hollow elastic sleeve to constrain the diameter of the hollow sleeve. A meniscus loop is formed adjacent the piston to define a major diameter of the air spring and thereby reduce the natural frequency of the air spring.
    Type: Grant
    Filed: November 15, 2016
    Date of Patent: March 3, 2020
    Inventor: Maxine C. McKenzie
  • AIR SPRING WITH CONSTRAINED ELASTIC SLEEVE
    Publication number: 20170058986
    Abstract: An air spring comprises a hollow elastic sleeve, an end component for securing the air spring to a first frame, a hollow piston for securing the air spring to a second frame that is movable relative to the first frame, and a cylinder surrounding the hollow elastic sleeve to constrain the diameter of the hollow sleeve. A meniscus loop is formed adjacent the piston to define a major diameter of the air spring and thereby reduce the natural frequency of the air spring.
    Type: Application
    Filed: November 15, 2016
    Publication date: March 2, 2017
    Inventor: Maxine C. McKenzie
  • AIR SPRING WITH CONSTRAINED ELASTIC SLEEVE
    Publication number: 20140352528
    Abstract: An air spring (10) comprises a hollow elastic sleeve (12), an upper component (22) for securing the air spring to a first frame, a hollow piston (14) for securing the air spring (10) to a second frame that is movable relative to the first frame, and a cylinder (16) surrounding the hollow elastic sleeve to constrain the diameter of the hollow sleeve (12) and reduce the effective area of the air spring to reduce the natural frequency of the air spring (10).
    Type: Application
    Filed: June 11, 2012
    Publication date: December 4, 2014
    Inventor: Maxine C. McKenzie