Check valve
OwnerTsai-Chen YANGinventor
Life of this patent
Estimating the term…
Abstract
A check valve is provided. The check valve includes a position limiting member, a back-flow preventing member and a lid body. The back-flow preventing member is disposed between the position limiting member and the lid body, and a blocking portion of the back-flow preventing member is flexible. When the blocking portion is impacted by an external water source, a gap will be formed between an external peripheral verge of the blocking portion and a stepped portion of the position limiting member to allow the water source to flow through the position limiting member. When the blocking portion is impacted by a reverse water source, the external peripheral verge of the blocking portion is abutted against the stepped portion to unallow the water source to flow through the position limiting member.
Claims7
A check valve, including:
- a position limiting portion, formed with a large diameter axle hole and a small diameter axle hole, a stepped portion formed between the large and small axle holes, the position limiting portion including a clasping portion;
- a back-flow preventing member, including a blocking portion and a fixing portion, the blocking portion disposed in the large diameter axle hole, an external diameter of the blocking portion being larger than that of the small diameter axle hole, the fixing portion restrictedly assembled with the clasping portion;
- a lid body, disposed in the large diameter axle hole and having at least one orifice and at least one abutting rib, the abutting rib abutted against the back-flow preventing member so that the back-flow preventing member is positioned between the lid body and the position limiting portion;
- wherein, the blocking portion is flexible;
- when the blocking portion is impacted by an external water source, a gap is formed between an external peripheral verge of the blocking portion and the stepped portion and the large and small diameter axle holes are communicated with each other;
- when the blocking portion is impacted by a reverse water source, the external peripheral verge of the blocking portion is abutted against the stepped portion and the large and small diameter axle holes are non-communicated with each other.
Dependencies are inferred from the claim text.