Patents by Inventor Richard Floyd Schaefer

Richard Floyd Schaefer 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: 10508482
    Abstract: Provided herein is a doorstop that may be utilized to prevent opening of a door. Generally, the doorstop is configured for attachment near a bottom edge of a pull side of a door. The doorstop has a deployable wedge or stop element (e.g., stop cylinder) that moves from a suspended position, above a floor surface, to a deployed position in contact with a floor surface. After contacting the floor surface, any attempt to open the door imparts a rotation on the stop element. A radial dimension of the stop element increases along a length of a surface that contact the floor surface. In this regard, rotating the stop element provides an upward lift to the door, which is counteracted by hinges of the door. That is, rotating the stop element results in the door wedging, which prevents opening the door.
    Type: Grant
    Filed: February 26, 2019
    Date of Patent: December 17, 2019
    Inventor: Richard Floyd Schaefer
  • Publication number: 20180064034
    Abstract: Disclosed herein is a landscaping stake and related driver. Generally, the landscaping stake is directed to a stake that may be configured into a U-shape and driven into the ground to secure landscaping elements such as edging. The stake has elongated legs having a contoured profile in cross-section which makes the legs very resistant to deformation permitting the landscaping stake to be driven into hard surfaces. The driver is configured to releasably engage the upper and of the landscaping stake.
    Type: Application
    Filed: November 14, 2016
    Publication date: March 8, 2018
    Inventors: Richard Floyd Schaefer, Gregory Lawrence Schaefer
  • Patent number: 8714211
    Abstract: An apparatus and methodology is provided for filling portable containers, such as sandbags, with aggregate materials. The utility utilizes a transfer mechanism to selectively transfer aggregate between a supply of aggregate material (e.g., sand) and first and second filling stations that direct received aggregate into portable containers or bags. The transfer mechanism is operative to alternately supply aggregate between the first and second filling stations and operates primarily under the force of gravity.
    Type: Grant
    Filed: August 30, 2013
    Date of Patent: May 6, 2014
    Inventor: Richard Floyd Schaefer
  • Patent number: 5848502
    Abstract: A system for mounting road signs and other posts which is simple to use, has few parts and is tamper resistant. The system also allows for the easy dismounting of the post for maintenance and changing of signs. The system uses a metal base driven into the ground, a non-square post with at least one flat side and a bifurcated wedge to lock the post into position in the base. This system also prevents rotation of the post due to winds or other forces.
    Type: Grant
    Filed: October 31, 1997
    Date of Patent: December 15, 1998
    Assignee: S-Square Tube Products
    Inventor: Richard Floyd Schaefer
  • Patent number: D415847
    Type: Grant
    Filed: August 1, 1997
    Date of Patent: October 26, 1999
    Assignee: S-Square Tube Products
    Inventor: Richard Floyd Schaefer
  • Patent number: D801764
    Type: Grant
    Filed: April 12, 2016
    Date of Patent: November 7, 2017
    Inventor: Richard Floyd Schaefer