Patents by Inventor David W. Reesor

David W. Reesor 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: 5129133
    Abstract: Removing the draft key from a so-called E-type railway car coupler can be a difficult job. A relatively simple tool for removing a key of the type including a flanged head includes a pair of parallel hydraulic cylinders, a yoke interconnecting one end of the cylinders, piston rods extending out of the other end of the cylinders, a sleeve in the yoke parallel to the cylinders, an elongated shaft for removable mounting in the sleeve, a latch for retaining the shaft in the sleeve, and a socket in the outer free end of the shaft for receiving the head of the key, whereby with the shaft in the sleeve and connected to a key, extension of the piston rods against the coupler pocket pushes the cylinders, and consequently the sleeve and shaft outwardly to pull the key from the coupler.
    Type: Grant
    Filed: April 22, 1991
    Date of Patent: July 14, 1992
    Inventor: David W. Reesor