Patents by Inventor Adam R. Friedrich

Adam R. Friedrich 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: 20240391711
    Abstract: A hot melt system is configured to generate liquid adhesive from solid adhesive pellets. The liquid adhesive is applied to components, such as box tops, to fix components together. A melter is configured to melt the adhesive pellets into the liquid adhesive. Adhesive pellets are periodically fed from a hopper to the melter to maintain a constant supply of liquid adhesive. An adjustable flow restrictor is disposed upstream of a feeder that displaces the adhesive pellets from the hopper to the melter. The adjustable flow restrictor is adjustable to change a flow of the compressed gas flow to the feeder. Adjusting the flow of the compressed gas flow adjusts the feed rate of the adhesive pellets from the hopper to the melter.
    Type: Application
    Filed: May 20, 2024
    Publication date: November 28, 2024
    Inventors: Adam R. Friedrich, John A. McGonnell
  • Patent number: 6896152
    Abstract: An electronic apparatus is provided for dispensing plural component materials having first and second (and optionally third) components and a desired ratio between the components. The apparatus has first and second reciprocating pumps (4), each of the pumps (4) being connected to a source of one of said components, first and second reciprocating drivers (5), each driver (5) being connected to drive one of the pumps and forming a driver-pump set, a position sensor (6) attached to each driver-pump set, each position sensor (6) outputting increments of resolution corresponding to a fixed volume being pumped by the driver-pump set to which it is connected, and a controller attached to the drivers and the position sensors to alternately move one of the driver-pump sets one said increment and the other of the driver-pump sets the product of one increment and the ratio.
    Type: Grant
    Filed: March 2, 2001
    Date of Patent: May 24, 2005
    Assignee: Graco Minnesota Inc.
    Inventors: David M. Pittman, Adam R. Friedrich
  • Publication number: 20030015547
    Abstract: An electronic apparatus is provided for dispensing plural component materials having first and second (and optionally third) components and a desired ratio between the components. The apparatus has first and second reciprocating pumps (4), each of the pumps (4) being connected to a source of one of said components, first and second reciprocating drivers (5), each driver (5) being connected to drive one of the pumps and forming a driver-pump set, a position sensor (6) attached to each driver-pump set, each position sensor (6) outputting increments of resolution corresponding to a fixed volume being pumped by the driver-pump set to which it is connected, and a controller attached to the drivers and the position sensors to alternately move one of the driver-pump sets one said increment and the other of the driver-pump sets the product of one increment and the ratio.
    Type: Application
    Filed: August 27, 2002
    Publication date: January 23, 2003
    Inventors: David M. Pittman, Adam R. Friedrich
  • Patent number: 6168308
    Abstract: A mechanical proportioner is provided with two pump lowers which are connected together by a yolk underneath an air-operated reciprocating piston pump. The pumps are staggered axially so as to enable overlapping of certain portions thereof thereby enabling the center-to-center distance to be minimized. The mix manifold is constructed in a concentric fashion such that mixed material does not come into contact with the mix manifold until it enters the static mixer at the exit of the manifold which is an easily disposable and replaceable part. The purge solvent valves on the mix manifold are each provided with an extension of their respective handles. If either purge valve is in its open position, a separate interlock handle operating the A and B side valves at the manifold inlet is prevented from opening. Similarly, if the interlock handle operating the A and B side valves is open, the purge valves cannot be opened.
    Type: Grant
    Filed: February 15, 1999
    Date of Patent: January 2, 2001
    Assignee: Graco Minnesota Inc.
    Inventors: David M. Pittman, Kenneth E. Lehrke, John F. Isais, Vicky J. Peterson, Adam R. Friedrich