Patents by Inventor Harlan R. Cagle

Harlan R. Cagle 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).

  • Press unloader with defrost and water drain valve
    Patent number: 4154147
    Abstract: A defrost and water drain valve suitable for use with air cylinders, such as used to furnish power to material handling equipment, is connected to receive air from the exhaust side of the piston and direct this air against the inlet end of the cylinder and is constructed so that it can also automatically function to permit drainage of condensed water in the cylinder. The valve includes means to control flow to and from the exhaust side of the piston and the use of its features in a flow control valve and a check valve is also disclosed.
    Type: Grant
    Filed: June 10, 1977
    Date of Patent: May 15, 1979
    Assignee: Sahlin International, Inc.
    Inventor: Harlan R. Cagle
  • Vacuum producing device
    Patent number: 4073602
    Abstract: A vacuum producing device comprises a venturi unit which functions to produce or stop producing a vacuum after predetermined movement of a surrounding sleeve and air shut off member and includes silencing means for substantially reducing the sound of pressure air passing through the device.
    Type: Grant
    Filed: April 12, 1976
    Date of Patent: February 14, 1978
    Assignee: Sahlin International Inc.
    Inventor: Harlan R. Cagle
  • Rotary spool valve
    Patent number: 4031918
    Abstract: A fluid flow control valve has a rotary spool with one or more standard, circular O-rings held in stretched condition by shoulders on the spool so that instead of extending all the way around the circumference of the spool each O-ring extends only a part of the way around the circumference and has two longitudinally extending sections as well as two arcuate circumferential sections that serve to seal the spool in the spool bore both during movement and while it is in a selected fluid flow controlling position.
    Type: Grant
    Filed: May 24, 1976
    Date of Patent: June 28, 1977
    Assignee: Sahlin International, Inc.
    Inventor: Harlan R. Cagle
  • Lift control system for press unloader or the like
    Patent number: 3975992
    Abstract: There is herein disclosed a lift control system for a press unloader having an extendable and retractable jaw means for gripping and removing a part from the die cavity of a press with pivotal frame means supporting the jaw means for pivotal movement to lift the part from the die cavity and interconnected air operated power cylinder means to sequentially extend the jaw means, grip the part, lift the part, and retract the jaw means.
    Type: Grant
    Filed: November 14, 1974
    Date of Patent: August 24, 1976
    Assignee: Sahlin International, Inc.
    Inventor: Harlan R. Cagle
  • Vacuum control system
    Patent number: 3967849
    Abstract: There is herein disclosed, in association with a high pressure air source and a vacuum cup, a vacuum forming device comprising a vacuum forming member movable between a vacuum forming position and a non-vacuum position by connection to and disconnection from the high pressure air source.
    Type: Grant
    Filed: May 14, 1975
    Date of Patent: July 6, 1976
    Assignee: Sahlin International, Inc.
    Inventor: Harlan R. Cagle