Michael Chiang

US Patent:

20200011439, Jan 9, 2020

Filed:

Sep 17, 2019

Appl. No.:

16/572923

Inventors:

- Santa Fe Springs CA, US
Michael Chiang - Rowland Heights CA, US

International Classification:

F16K 15/03
F16K 24/06

Abstract:

An air admittance valve preventing mephitis overflow, having a main body with an air entry guide base defining an air entry guide; a pivot support; and a valve seat. A sealing valve group having a sealing valve body that defines a recess; a flexible member; a pivot housing; and a pivot. The valve seat is located about the air entry guide. The pivot is located in the pivot housing and the pivot support, and the pivot is located along, or adjacent to, the center of gravity of the sealing valve body. The flexible member is at least partially located in the recess and abuts the main body; and when the air admittance valve is closed, the sealing valve body abuts the valve seat.

US Patent:

20180038496, Feb 8, 2018

Filed:

Oct 18, 2017

Appl. No.:

15/786814

Inventors:

- Santa Fe Springs CA, US
Michael Chiang - Rowland Heights CA, US

International Classification:

F16K 15/03
F16K 24/06

Abstract:

An air admittance valve preventing mephitis overflow, having a main body with an air entry guide base defining an air entry guide; a pivot support; and a valve seat. A sealing valve group having a sealing valve body that defines a recess; a flexible member; a pivot housing; and a pivot. The valve seat is located about the air entry guide. The pivot is located in the pivot housing and the pivot support, and the pivot is located along, or adjacent to, the center of gravity of the sealing valve body. The flexible member is at least partially located in the recess and abuts the main body; and when the air admittance valve is closed, the sealing valve body abuts the valve seat.

US Patent:

20160201814, Jul 14, 2016

Filed:

Jul 30, 2015

Appl. No.:

14/813422

Inventors:

- Santa Fe Springs CA, US
Michael Chiang - Rowland Heights CA, US

International Classification:

F16K 15/03

Abstract:

An air admittance valve preventing mephitis overflow, having a main body with an air entry guide base defining an air entry guide; a pivot support; and a valve seat. A sealing valve group having a sealing valve body that defines a recess; a flexible member; a pivot housing; and a pivot. The valve seat is located about the air entry guide. The pivot is located in the pivot housing and the pivot support, and the pivot is located along, or adjacent to, the center of gravity of the sealing valve body. The flexible member is at least partially located in the recess and abuts the main body; and when the air admittance valve is closed, the sealing valve body abuts the valve seat.