Daniel E Sabelko

US Patent:

8256450, Sep 4, 2012

Filed:

Jun 30, 2009

Appl. No.:

12/459328

Inventors:

Robert A. Hansen - Oakdale MN, US
Daniel Sabelko - Elk River MN, US

Assignee:

Dynamil Air Inc. - St. Paul MN

International Classification:

F16K 25/00

US Classification:

137340, 251173, 251307, 277605, 277646

Abstract:

A butterfly valve with an undulating sealing surface, which has an inflatable annular seal mounted in a housing. A disk is pivotally mounted in the housing and has an edge with an undulating sealing surface and a peripheral sealing edge. The undulating sealing surface of the disk and a sealing face of the annular seal have non-mating profiles when the valve is in an unsealed condition. Pressure in a chamber proximate the annular seal causes the face of the annular seal to expand and deform and the face forms a high-pressure seal between the sealing ridge and the annular seal. Also includes a method for stopping delivery of a conduit transportable material through a butterfly valve.

US Patent:

8607815, Dec 17, 2013

Filed:

May 15, 2012

Appl. No.:

13/506753

Inventors:

Robert A. Hansen - Oakdale MN, US
Daniel Sabelko - Elk River MN, US

Assignee:

Dynamic Air Inc. - St. Paul MN

International Classification:

F16K 25/00

US Classification:

137340, 251173, 251307, 277605, 277646

Abstract:

A butterfly valve with an undulating sealing surface, which has an inflatable annular seal mounted in a housing. A disk is pivotally mounted in the housing and has an edge with an undulating sealing surface and a peripheral sealing edge. The undulating sealing surface of the disk and a sealing face of the annular seal have non-mating profiles when the valve is in an unsealed condition. Pressure in a chamber proximate the annular seal causes the face of the annular seal to expand and deform and the face forms a high-pressure seal between the sealing ridge and the annular seal. Also includes a method for stopping delivery, of a conduit transportable material through a butterfly valve.

US Patent:

20200232297, Jul 23, 2020

Filed:

Jan 16, 2020

Appl. No.:

16/744258

Inventors:

- Houston TX, US
Christian Leuchtenberg - Shamrock Park, SG
Phil J. Engelman - Ham Lake MN, US
Jeffrey S. Meister - Ham Lake MN, US
Daniel E. Sabelko - Otsego MN, US
Nicolas A. Haugen - St. Louis Park MN, US

Assignee:

NTDrill Holdings, LLC - Houston TX

International Classification:

E21B 33/08

Abstract:

The disclosure relates to a rotating control device used in a drilling system having a non-rotating tubular RCD housing enclosing an elongate passage. A mandrel rotatably extends along the passage about an axis. A seal assembly seals the RCD housing to the mandrel and provides first and second seals against the mandrel's exterior surface. The first and second seals are spaced parallel to the mandrel's axis to create space between the mandrel and the first and second seals The first seal has a first side exposed to fluid pressure in the RCD housing and a second side exposed to fluid in the space between the seals. The second seal has a first side exposed to fluid pressure in the space between the seals and a second side exposed to fluid pressure at the exterior of the RCD housing. A pressure stepping mechanism supplies fluid to the space between the two seals.