Patents by Inventor David J. Dunlap
David J. Dunlap 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).
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Patent number: 9517487Abstract: A dispenser for applying small amounts of liquid to a substrate. The dispenser includes a dispenser body, an actuator in the dispenser body, and a dispensing element including a dispensing element body removably coupled to the dispenser body. A valve stem is mounted for reciprocating movement within the dispensing element body. Additional aspects include a deformable valve seat, a deformable and resilient valve stem tip and a method of applying liquid in discrete amounts to a substrate.Type: GrantFiled: March 28, 2014Date of Patent: December 13, 2016Assignee: Nordson CorporationInventors: David J. Dunlap, Laurence B. Saidman, Edward C. Taylor
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Patent number: 9327307Abstract: A dispenser for applying small amounts of liquid to a substrate. The dispenser includes a dispenser body, an actuator in the dispenser body, and a dispensing element including a dispensing element body removably coupled to the dispenser body. A valve stem is mounted for reciprocating movement within the dispensing element body. Additional aspects include a deformable valve seat, a deformable and resilient valve stem tip and a method of applying liquid in discrete amounts to a substrate.Type: GrantFiled: March 28, 2014Date of Patent: May 3, 2016Assignee: NORDSON CORPORATIONInventors: David J. Dunlap, Laurence B. Saidman, Edward C. Taylor
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Publication number: 20140209626Abstract: A dispenser for applying small amounts of liquid to a substrate. The dispenser includes a dispenser body, an actuator in the dispenser body, and a dispensing element including a dispensing element body removably coupled to the dispenser body. A valve stem is mounted for reciprocating movement within the dispensing element body. Additional aspects include a deformable valve seat, a deformable and resilient valve stem tip and a method of applying liquid in discrete amounts to a substrate.Type: ApplicationFiled: March 28, 2014Publication date: July 31, 2014Applicant: NORDSON CORPORATIONInventors: David J. Dunlap, Laurence B. Saidman, Edward C. Taylor
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Publication number: 20140197210Abstract: A dispenser for applying small amounts of liquid to a substrate. The dispenser includes a dispenser body, an actuator in the dispenser body, and a dispensing element including a dispensing element body removably coupled to the dispenser body. A valve stem is mounted for reciprocating movement within the dispensing element body. Additional aspects include a deformable valve seat, a deformable and resilient valve stem tip and a method of applying liquid in discrete amounts to a substrate.Type: ApplicationFiled: March 28, 2014Publication date: July 17, 2014Applicant: NORDSON CORPORATIONInventors: David J. Dunlap, Laurence B. Saidman, Edward C. Taylor
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Patent number: 8708246Abstract: A dispenser for applying small amounts of liquid to a substrate. The dispenser includes a dispenser body, an actuator in the dispenser body, and a dispensing element including a dispensing element body removably coupled to the dispenser body. A valve stem is mounted for reciprocating movement within the dispensing element body. Additional aspects include a deformable valve seat, a deformable and resilient valve stem tip and a method of applying liquid in discrete amounts to a substrate.Type: GrantFiled: October 28, 2011Date of Patent: April 29, 2014Assignee: Nordson CorporationInventors: David J. Dunlap, Laurence B. Saidman, Edward C. Taylor
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Publication number: 20130105597Abstract: A dispenser for applying small amounts of liquid to a substrate. The dispenser includes a dispenser body, an actuator in the dispenser body, and a dispensing element including a dispensing element body removably coupled to the dispenser body. A valve stem is mounted for reciprocating movement within the dispensing element body. Additional aspects include a deformable valve seat, a deformable and resilient valve stem tip and a method of applying liquid in discrete amounts to a substrate.Type: ApplicationFiled: October 28, 2011Publication date: May 2, 2013Applicant: NORDSON CORPORATIONInventors: David J. Dunlap, Laurence B. Saidman, Edward C. Taylor
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Patent number: 8337737Abstract: A dispenser for dispensing a liquid onto a substrate includes a dispenser body having an output and a reservoir in fluid communication with the output, the reservoir being defined by a wall and adapted to hold a supply of liquid to be dispensed. A piston is disposed in the reservoir and adapted to pressurize the liquid so that an amount of liquid is dispensed from the output of the dispenser. The piston includes a base portion having an outer periphery and having a first hardness, and a skirt portion integrally molded to the outer periphery of the base portion and having a second hardness lower than the first hardness. A two-shot molding operation may be used to form the piston with the base portion being, for example, formed in the first shot of the molding operation and the skirt portion being formed in the second shot of the molding operation.Type: GrantFiled: January 13, 2011Date of Patent: December 25, 2012Assignee: Nordson CorporationInventors: Steven G. Costa, David J. Dunlap
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Publication number: 20110101563Abstract: A dispenser for dispensing a liquid onto a substrate includes a dispenser body having an output and a reservoir in fluid communication with the output, the reservoir being defined by a wall and adapted to hold a supply of liquid to be dispensed. A piston is disposed in the reservoir and adapted to pressurize the liquid so that an amount of liquid is dispensed from the output of the dispenser. The piston includes a base portion having an outer periphery and having a first hardness, and a skirt portion integrally molded to the outer periphery of the base portion and having a second hardness lower than the first hardness. A two-shot molding operation may be used to form the piston with the base portion being, for example, formed in the first shot of the molding operation and the skirt portion being formed in the second shot of the molding operation.Type: ApplicationFiled: January 13, 2011Publication date: May 5, 2011Applicant: NORDSON CORPORATIONInventors: Steven G. Costa, David J. Dunlap
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Patent number: 7891528Abstract: A dispenser for dispensing a liquid onto a substrate includes a dispenser body having an output and a reservoir in fluid communication with the output, the reservoir being defined by a wall and adapted to hold a supply of liquid to be dispensed. A piston is disposed in the reservoir and adapted to pressurize the liquid so that an amount of liquid is dispensed from the output of the dispenser. The piston includes a base portion having an outer periphery and having a first hardness, and a skirt portion integrally molded to the outer periphery of the base portion and having a second hardness lower than the first hardness. A two-shot molding operation may be used to form the piston with the base portion being, for example, formed in the first shot of the molding operation and the skirt portion being formed in the second shot of the molding operation.Type: GrantFiled: June 11, 2007Date of Patent: February 22, 2011Assignee: Nordson CorporationInventors: Steven G. Costa, David J. Dunlap
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Publication number: 20080041885Abstract: A dispenser for dispensing a liquid onto a substrate includes a dispenser body having an output and a reservoir in fluid communication with the output, the reservoir being defined by a wall and adapted to hold a supply of liquid to be dispensed. A piston is disposed in the reservoir and adapted to pressurize the liquid so that an amount of liquid is dispensed from the output of the dispenser. The piston includes a base portion having an outer periphery and having a first hardness, and a skirt portion integrally molded to the outer periphery of the base portion and having a second hardness lower than the first hardness. A two-shot molding operation may be used to form the piston with the base portion being, for example, formed in the first shot of the molding operation and the skirt portion being formed in the second shot of the molding operation.Type: ApplicationFiled: June 11, 2007Publication date: February 21, 2008Applicant: NORDSON CORPORATIONInventors: Steven G. Costa, David J. Dunlap
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Patent number: 6618425Abstract: A laser controller interconnected with an electric discharge laser communicates with a remote computer incorporating a display screen programmably emulating a conventional keyboard. The display screen has a plurality of imaged virtual keys each programmably emulating a physical key of a conventional keyboard. Some virtual keys programmably emulate a prescribed sequence of keystrokes, which control, monitor, and record the laser operation. A prescribed sequence can optionally be automated, conditional, or interrupted by operator prompts. The remote computer communicates serially with the laser controller through an electrically conductive cable, a fiberoptic link, or a wireless channel. A keystroke is typically applied by manually pressing the position of a corresponding virtual key on a touch sensitive screen, or alternatively by actuating a conventional pointing device.Type: GrantFiled: November 17, 1999Date of Patent: September 9, 2003Assignee: Cymer, Inc.Inventors: Jason R. Carlesi, David J. Dunlap, Igor V. Fomenkov