Joseph Jinsun Han

US Patent:

6442772, Sep 3, 2002

Filed:

Mar 26, 2001

Appl. No.:

09/818451

Inventors:

Joseph Han - Irvine CA
John McKay - Placentia CA
Tracy James Haggstrom - Orange CA
Farid Maiwandi - Laguna Hills CA

Assignee:

Fluidmaster, Inc. - San Juan Capistrano CA

International Classification:

E03D 114

US Classification:

4325, 4410

Abstract:

A flush valve is adapted to be mounted in the tank of a toilet and includes a selector assembly and a flush valve. The selector assembly is accessible from outside the toilet and provides for initiation of the flushing operation and an alternative choice between a larger flush water volume and a smaller flush water volume. A support structure provides for both axial and radial movement of the selector assembly relative to the flush valve in order to facilitate mounting and aligning of the flush valve assembly. A slide mechanism provides for variation of at least the smaller flush water volume.

US Patent:

6478237, Nov 12, 2002

Filed:

Jan 23, 2001

Appl. No.:

09/769623

Inventors:

Don Michael Kearby - Breckenridge TX
Joseph U. Han - Irvine CA
Giles A. Kendall - Claremont CA
Derick C. Wright - Ogden UT

Assignee:

Virtual rain, Inc. - Breckenridge TX

International Classification:

B05B 308

US Classification:

239232, 239104, 239114, 239123, 239205, 239206, 239231, 239571, 239575

Abstract:

A dirt-resistant bearing system for a sprinkler unit with a rotatable turret having a central shaft extending into a support channel formed within an inner housing. The central shaft may be formed with a relatively upper shaft portion and a relatively lower shaft portion, and the support channel may be formed with an upper channel region and a lower channel region. A first bearing and sealing assembly may be fitted substantially around an outer perimeter of the upper shaft portion and in communication with the upper channel region, and a second bearing and sealing assembly may be fitted substantially around an outer perimeter of the lower shaft portion and in communication with the lower channel region. Another aspect of the invention provides a sprinkler head with a fitted serrated seal assembly. The fitted seal assembly may include an outer case having an interior region, and a pop-up sprinkler head turret mounted on a riser sleeve slidably mounted within the interior region of the outer case.

US Patent:

6604249, Aug 12, 2003

Filed:

Apr 29, 2002

Appl. No.:

10/134001

Inventors:

Joseph Han - Irvine CA
John McKay - Placentia CA
Tracy James Haggstrom - Orange CA
Farid Maiwandi - Laguna Hills CA

Assignee:

Fluidmaster, Inc. - San Juan Capistrano CA

International Classification:

E03D 509

US Classification:

4410

Abstract:

A flush valve is adapted to be mounted in the tank of a toilet and includes a selector assembly and a flush valve. The selector assembly is accessible from outside the toilet and provides for initiation of the flushing operation and an alternative choice between a larger flush water volume and a smaller flush water volume. A support structure provides for both axial and radial movement of the selector assembly relative to the flush valve in order to facilitate mounting and aligning of the flush valve assembly. A slide mechanism provides for variation of at least the smaller flush water volume.

US Patent:

6715162, Apr 6, 2004

Filed:

Aug 30, 2002

Appl. No.:

10/231324

Inventors:

Joseph Unkyung Han - Irvine CA
Aleksandr V. Prokopenko - Bordentown NJ
Robert Michael Jensen - East Brunswick NJ

Assignee:

American Standard Inc. - Piscataway NJ

International Classification:

E03D 134

US Classification:

4391, 4415, 4378, 4379, 4380

Abstract:

A toilet includes a toilet bowl assembly having a toilet bowl and a trapway extending from the bottom of the toilet bowl to a sewage line. The toilet bowl has a rim channel provided along an upper perimeter portion thereof. In this toilet, the flush water flows through the rim channel in a path which is asymmetric and unidirectional along the entire perimeter portion thereof. The rim channel includes a plurality of rim openings distributed evenly along the perimeter of the rim channel. Flush water passing through the plurality of rim openings pre-wets the entire perimeter of the toilet bowl. The rim channel further includes a pair of water discharge slots which directs water directly into the toilet bowl in two powerful streams. The flush valve allowing passage of water from the water tank to the toilet bowl assembly is in the form of a valve inlet having a radiused port to generate greater energy throughput of the flush water.

US Patent:

6728975, May 4, 2004

Filed:

Aug 30, 2002

Appl. No.:

10/232878

Inventors:

Joseph Unkyung Han - Irvine CA

Assignee:

American Standard Inc. - Piscataway NJ

International Classification:

E03D 134

US Classification:

4378, 4390, 4391, 4324

Abstract:

A flush valve assembly for a water tank of a water closet which includes a first valve member which can be secured to the water tank and has a base sleeve position including a radiused inlet to thereby increase the discharge coefficient of the valve opening. A second valve member is coaxially and slidably mounted with respect to the first valve member so that the valve opening is created between the first and second valve members when the second valve member is removed from the first valve member. The second valve member is slidably movable between a first rest position, wherein the second valve member is seated on the base sleeve portion of the first valve member so that water cannot pass through the valve opening, and a second position, wherein the second valve member is removed from the base sleeve portion of the first valve member so that water can pass through the valve opening. A sealing member is provided for sealing the valve opening when the second valve member is in its first rest position and seated on the base sleeve portion of the first valve member. A guiding assembly is further provided for properly guiding and aligning the second valve member with respect to the first valve member when the second valve member is moved between its first and second position.

US Patent:

6901610, Jun 7, 2005

Filed:

Mar 29, 2004

Appl. No.:

10/813497

Inventors:

Robert Jensen - East Brunswick NJ, US
Joseph Unkyung Han - Irvine CA, US

Assignee:

American Standard International, Inc. - New York NY

International Classification:

E03D001/34

US Classification:

4378, 4324, 4390, 4391

Abstract:

A flush valve assembly includes a valve body with a first cylindrical tube member and a flush cover member that is coaxially and slidably mounted with respect to the valve body so as to create a valve opening therebetween when the flush cover member is removed from the valve body. A guiding means is provided that includes a second cylindrical tube member secured to the flush cover member and slidably fitted over the first cylindrical tube member. The guiding means further includes at least one alignment tab on the flush cover member that engages a corresponding tab recess defined in the valve body. A secondary float assembly pivotably affixed to the valve body has a flotation cup with a resilient member integral therewith. A pawl member includes retention members in combination with each of a primary finger and a secondary finger that engage an integral tab portion along an outside peripheral surface of the flush cover member during reciprocating movement of the flush cover member. A trip release mechanism that is coaxially mounted with respect to the valve body and flush cover member releases the effect of a flush lever on the flush cover member when the flush cover member reaches a position that permits fluid flow through the valve opening.

US Patent:

7374123, May 20, 2008

Filed:

Sep 5, 2006

Appl. No.:

11/470101

Inventors:

Joseph Unkyung Han - Irvine CA, US

International Classification:

B65H 75/48

US Classification:

2423852

Abstract:

A mechanism for rewinding flexible members onto a spool is described. The inventive rewind mechanism permits a flexible member to be pulled outside its housing and remain outside the housing without a rewind force on the flexible member simply by pulling on the flexible member and releasing it. The flexible member is rewound into the housing simply by pulling and releasing it again.

US Patent:

7559337, Jul 14, 2009

Filed:

Jun 15, 2007

Appl. No.:

11/818861

Inventors:

Joseph Han - Irvine CA, US

Assignee:

Fluidmaster, Inc. - San Juan Capistrano CA

International Classification:

F16K 31/18

US Classification:

137445, 137426, 137429

Abstract:

A collapsible floating apparatus for controlling a valve includes a floating device and a collapsible lever. The collapsible lever includes a first member rotatably coupled to the valve, and a second member attached to the floating device at one end and rotatably coupled to the first member adjacent another end. The apparatus has a retracted position for shipping and storage, and operational positions. In the position, the second member, or the first and second members together, are brought adjacent to the valve. In operational positions, the first and second members act as a single lever to relay the buoyancy of the floating device drives to the valve. An adjusting member is provided for adjusting a relative position or angle between the first and second members, which in turn adjusts a water level.