Patents by Inventor Ronald E. Spooner

Ronald E. Spooner 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: 3993094
    Abstract: A detachable cover member for use with a reservoir for hydraulic fluid such as oil in which the various components associated with the reservoir are rigidly mounted on the cover member and are removed from the reservoir tank when the cover is removed. Thus, the suction conduit and the return conduit extend through and are both rigidly secured, as by welding, to the detachable cover member. The respective suction and return conduits are adapted to extend down into the interior of the reservoir tank when the cover member is secured in overlying relation to the cover-receiving opening of the reservoir. A baffle member is rigidly secured to the normally inner surface of the cover member in a plane substantially perpendicular to the inner surface of the cover to divide the interior of the reservoir into suction and return chambers, the baffle being so constructed as to permit fluid communication between the two chambers.
    Type: Grant
    Filed: April 21, 1975
    Date of Patent: November 23, 1976
    Assignee: Allis-Chalmers Corporation
    Inventor: Ronald E. Spooner
  • Patent number: 3960286
    Abstract: When the load moment on a counterbalanced lift truck exceeds a predetermined magnitude, a blocking valve automatically prevents forward tilting of the mast and elevation of the load. The load moment is sensed by the pressure differential across the tilt jack and the blocking valve is actuated by the pressure differential. In order to prevent the blocking valve from becoming locked up, when the tilt jack is contracted to the end of its stroke, a spring-biased unloading valve is incorporated in the tilt jack piston. Abuse of the truck is reduced and operator safety is improved further by the provision of a second blocking valve which prevents lifting loads when the tilt jack is at the end of its extension stroke, that is when the mast is tilted forwardly as far as permitted by the tilt jack. In this condition the second blocking valve will close preventing further raising of the load. However, retraction of the tilt and lift jacks is permitted even though the blocking valves are in their closed positions.
    Type: Grant
    Filed: December 19, 1974
    Date of Patent: June 1, 1976
    Assignee: Allis-Chalmers Corporation
    Inventors: Ronald E. Spooner, Terry R. Downing