Robert A Larsen

US Patent:

8636034, Jan 28, 2014

Filed:

Oct 9, 2012

Appl. No.:

13/648072

Inventors:

Keith P. Hoffman - Rolling Meadows IL, US
Robert C. Larsen - Bartlett IL, US
John Ozcomert - Bartlett IL, US
Douglas A. Wielunski - Bartlett IL, US

Assignee:

Plitek, L.L.C. - Des Plaines IL

International Classification:

F16K 15/14
B65D 33/01

US Classification:

137844, 210499, 137550, 137851

Abstract:

A one-way pressure relief valve having an integrated filter. One-way pressure relief valves may be applied to a product package to evacuate gas from the package. The integrated filter prevents materials within the package from interfering with closure or operation of the pressure relief valve. Certain pressure relief valve embodiments can be configured for optimal valve operation without need for a wetting agent while other pressure relief valve embodiments operate optimally with a wetting agent.

US Patent:

20130048635, Feb 28, 2013

Filed:

Aug 31, 2011

Appl. No.:

13/199486

Inventors:

Karl K. Hoffman - Arlington Heights IL, US
Keith P. Hoffman - Rolling Meadows IL, US
Robert C. Larsen - Bartlett IL, US
Douglas A. Wielunski - Bartlett IL, US

International Classification:

B65D 90/32
F16K 15/00

US Classification:

220 891, 137511

Abstract:

A self contained one-way pressure relief valve for application to product packaging that does not require the addition of a sealing lubricant. Atop a base with an opening extending through is an adhesive-like material layer, and a dry strap of a silicone or other release film coated membrane, all of which are of gas impervious materials. The release coated material layer covering the opening with the release film in contact with the adhesive-like material creating a surface attraction between the release film and the adhesive-like material. An intermediate layer of gas impervious material with an opening extending through provides for including a gas pervious filter material layer that may be for fine particulates or liquid proof.

US Patent:

40456730, Aug 30, 1977

Filed:

May 12, 1976

Appl. No.:

5/685589

Inventors:

Robert P. Larsen - Downers Grove IL

Assignee:

The United States of America as represented by the United States Energy
Research and Development Administration - Washington DC

International Classification:

G01T 120
G01T 124

US Classification:

250364

Abstract:

Alpha emitters for low-level radiochemical analysis by measurement of alpha spectra are positioned precisely with respect to the location of a surface-barrier detector by means of a chamber having a removable threaded planchet holder. A pedestal on the planchet holder holds a specimen in fixed engagement close to the detector. Insertion of the planchet holder establishes an O-ring seal that permits the chamber to be pumped to a desired vacuum. The detector is protected against accidental contact and resulting damage.

US Patent:

20150135967, May 21, 2015

Filed:

Nov 21, 2013

Appl. No.:

14/086753

Inventors:

- Des Plaines IL, US
John Ozcomert - Bartlett IL, US
Robert C. Larsen - Bartlett IL, US

Assignee:

Plitek, L.L.C. - Des Plaines IL

International Classification:

A47J 31/40
A47J 31/44

US Classification:

99295, 22020319

Abstract:

An improved single-serve cartridge with a one-way gas pressure relief valve for beverage brewing, preferably in an automatic single-serve beverage brewer device such as the Keurig Single Cup Brewing System, and cartridge components are described. In embodiments, the improved cartridge contains ground coffee or other particulate beverage medium. A one-way gas pressure relief valve permits gas produced by the ground coffee to escape from the cartridge before use of the cartridge in a brewer, thereby avoiding certain disadvantages associated with excessive pressure within the cartridge. The one-way gas pressure relief valve is also essentially liquid-tight to liquid injected into the cartridge by the brewer avoiding problems associated with liquid leakage and allowing the cartridge to function in the brewer in the same manner as an unmodified cartridge. The improved cartridge enables ground coffee, in particular, to be packaged immediately following roasting and grinding when at its optimal freshness to provide for improved beverage flavor and quality while maintaining package quality and integrity.

US Patent:

20140318653, Oct 30, 2014

Filed:

Jul 14, 2014

Appl. No.:

14/330576

Inventors:

- Des Plaines IL, US
Robert C. Larsen - Bartlett IL, US
Keith P. Hoffman - Rolling Meadows IL, US
Douglas A. Wielunski - Waterford WI, US

Assignee:

PLITEK, L.L.C. - Des Plaines IL

International Classification:

F16K 17/164
B65D 77/22
F16K 15/14

US Classification:

137855

Abstract:

A self contained one-way pressure relief valve for application to product packaging that does not require the addition of a sealing lubricant. Atop a base with an opening extending through the base is an adhesive-like material layer, and a dry strap of a silicone or other release film coated membrane, all of which are of gas impervious materials. The release film coated material layer covers the opening with the release film in contact with the adhesive-like material creating a surface attraction between the release film and the adhesive-like material. An intermediate layer of gas impervious material with an opening extending through such layer may be provided. A gas pervious filter material layer may be provided to block passage of fine particulates or liquid.