Joseph Sangjin 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:

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:

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.

US Patent:

7900290, Mar 8, 2011

Filed:

Feb 9, 2006

Appl. No.:

11/351200

Inventors:

Joseph Han - Irvine CA, US

Assignee:

Fluidmaster, Inc. - San Juan Capistrano CA

International Classification:

E03D 1/14
E03D 3/12

US Classification:

4325, 4324, 4410

Abstract:

A dual flush refill device refills a bowl of a siphonic toilet with adequate supply of refill water in response to either a full or partial flush without wasting the refill water. The device provides a relatively high flow rate of refill water from a refill tube to an overflow tube in response to a partial flush, and a relatively low rate of refill water from the refill tube to the overflow tube in response to a full flush. As a result, the toilet bowl is refilled with a substantially similar volume of refill water regardless of which flush option is selected.

US Patent:

8104103, Jan 31, 2012

Filed:

Nov 26, 2008

Appl. No.:

12/315055

Inventors:

Joseph Han - Irvine CA, US

Assignee:

Fluidmaster, Inc. - San Juan Capistrano CA

International Classification:

E03D 1/35

US Classification:

4393, 4378, 4392

Abstract:

A flapper flush valve assembly includes a pair of laterally movable mounting arms which may be adjusted to vary a width therebetween to accommodate overflow tubes of different sizes. The flapper valve assembly is coupled to pivot members connected to an overflow tube. Mounting ears on the pivot members may include projections to provide spacing between the rotating mounting arms and adjacent sidewall of a toilet tank, thereby preventing jams.