Patents by Inventor Marthinus Hendrik Doman

Marthinus Hendrik Doman 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).

  • Publication number: 20230167903
    Abstract: A seal for sealing between first and second grooves, the seal comprising a first sealing part for sealing against the first groove and a second sealing part extending from the first seal, the second sealing part having a convex cross-section relative to the seal for providing at least two sealing contact points against the second groove. The second sealing part provides a mandibular structure with chin-like protrusions which may improve conformation to the natural surface irregularities of the sealing surfaces.
    Type: Application
    Filed: September 20, 2022
    Publication date: June 1, 2023
    Inventor: Marthinus Hendrik Doman
  • Patent number: 11480249
    Abstract: A seal for sealing between first and second grooves, the seal comprising a first sealing part for sealing against the first groove and a second sealing part extending from the first seal, the second sealing part having a convex cross-section relative to the seal for providing at least two sealing contact points against the second groove. The second sealing part provides a mandibular structure with chin-like protrusions which may improve conformation to the natural surface irregularities of the sealing surfaces.
    Type: Grant
    Filed: August 28, 2020
    Date of Patent: October 25, 2022
    Inventor: Marthinus Hendrik Doman
  • Publication number: 20210396317
    Abstract: A seal for sealing between first and second grooves, the seal comprising a first sealing part for sealing against the first groove and a second sealing part extending from the first seal, the second sealing part having a convex cross-section relative to the seal for providing at least two sealing contact points against the second groove. The second sealing part provides a mandibular structure with chin-like protrusions which may improve conformation to the natural surface irregularities of the sealing surfaces.
    Type: Application
    Filed: August 28, 2020
    Publication date: December 23, 2021
    Inventor: Marthinus Hendrik Doman
  • Patent number: 9668510
    Abstract: A cooler with an insulated housing comprising an encircling wall, base and lid, the insulated housing defining a storage cavity and having an air channel communicating from the storage cavity to outside the insulated housing, the air channel being defined by channel walls and forming at least in part a cylinder; and a vacuum pump integral with the insulated housing, the vacuum pump comprising a piston arranged to reciprocate within the cylinder under manual control from outside of the insulated housing. A method including placing material within a storage cavity of an insulated cooler, the material having an average temperature different than an ambient temperature; closing a lid over the storage cavity; and operating a vacuum pump to reduce the air pressure within the storage cavity. A combination of the cooler and ice within the storage cavity.
    Type: Grant
    Filed: August 1, 2014
    Date of Patent: June 6, 2017
    Inventor: Marthinus Hendrik Doman
  • Publication number: 20150216221
    Abstract: A cooler with an insulated housing comprising an encircling wall, base and lid, the insulated housing defining a storage cavity and having an air channel communicating from the storage cavity to outside the insulated housing, the air channel being defined by channel walls and forming at least in part a cylinder; and a vacuum pump integral with the insulated housing, the vacuum pump comprising a piston arranged to reciprocate within the cylinder under manual control from outside of the insulated housing. A method including placing material within a storage cavity of an insulated cooler, the material having an average temperature different than an ambient temperature; closing a lid over the storage cavity; and operating a vacuum pump to reduce the air pressure within the storage cavity. A combination of the cooler and ice within the storage cavity.
    Type: Application
    Filed: August 1, 2014
    Publication date: August 6, 2015
    Inventor: Marthinus Hendrik Doman