Back to results
US 2014/0150892 A1Published application
Access cover in backflow prevention device
OwnerDouglas Hunter Powellinventor
Life of this patent
Estimating the term…
Abstract
A backflow prevention device including an opening in the housing configured to provide a user with access to the upstream check valve and the downstream check valve. The backflow prevention device further includes a cover configured to cover the entirety of the opening. The cover includes a portion of a lateral surface of a right cylinder. The backflow prevention device additionally includes a seal configured to sealingly engage the cover and the housing along the perimeter of the cover.
Claims20
A backflow prevention device, the backflow prevention device comprising:
- a housing defining a water flow stream;
- an upstream shutoff valve, wherein the upstream shutoff valve is configured to allow a user to control the water flow stream through the housing;
- an upstream check valve:
- located within the housing downstream of the upstream shutoff valve;
- and
- including:
- an orifice, wherein the orifice is configured to allow the water flow stream through the upstream check valve;
- and
- a clapper, wherein the clapper is configured to:
- allow the water flow stream through the orifice when open;
- and
- prevent the water flow stream through the orifice when in a closed position by mating with the orifice;
- a downstream check valve:
- located within the housing downstream of the upstream check valve;
- and
- including:
- an orifice, wherein the orifice is configured to allow the water flow stream through the downstream check valve;
- a clapper, wherein the clapper is configured to:
- allow the water flow stream through the orifice when open;
- and
- prevent the water flow stream through the orifice when in a closed position by mating with the orifice;
- a downstream shutoff valve, wherein the downstream shutoff valve is configured to allow a user to control the water flow stream through the housing;
- an access port in the housing configured to provide a user with access to the upstream check valve and the downstream check valve;
- a cover:
- configured to cover the entirety of the access port;
- and
- including a portion of a lateral surface of a right cylinder;
- and
- wherein the lateral surface is non-concentric with the axis of curvature of the housing at the access port;
- and
- a seal configured to sealingly engage the cover and the housing along the perimeter of the cover.
28 more elements
A backflow prevention device, the backflow prevention device comprising:
- a housing defining a water flow stream;
- an upstream shutoff valve, wherein the upstream shutoff valve is configured to allow a user to control the water flow stream through the housing;
- an upstream check valve:
- located within the housing downstream of the upstream shutoff valve;
- and
- including:
- an orifice, wherein the orifice is configured to allow the water flow stream through the upstream check valve;
- and
- a clapper, wherein the clapper is configured to:
- allow the water flow stream through the orifice when open;
- and
- prevent the water flow stream through the orifice when in a closed position by mating with the orifice;
- a downstream check valve:
- located within the housing downstream of the upstream check valve;
- and
- including:
- an orifice, wherein the orifice is configured to allow the water flow stream through the downstream check valve;
- a clapper, wherein the clapper is configured to:
- allow the water flow stream through the orifice when open;
- and
- prevent the water flow stream through the orifice when in a closed position by mating with the orifice;
- and
- a downstream shutoff valve, wherein the downstream shutoff valve is configured to allow a user to control the water flow stream through the housing;
- an access port in the housing configured to provide a user with access to the upstream check valve and the downstream check valve;
- a cover:
- configured to cover the entirety of the access port;
- and
- including a portion of a lateral surface of a right cylinder;
- and
- wherein the lateral surface is non-concentric with the axis of curvature of the housing at the access port;
- wherein the radius of curvature of the cover is larger than a radius of curvature of the housing at the access port;
- and
- a seal configured to sealingly engage the cover and the housing along the perimeter of the cover.
30 more elements
A backflow prevention device, the backflow prevention device comprising:
- a housing defining a water flow stream;
- an upstream shutoff valve, wherein the upstream shutoff valve is configured to allow a user to control the water flow stream through the housing;
- an upstream check valve:
- located within the housing downstream of the upstream shutoff valve;
- and
- including:
- a seat configured to mate with a portion of the housing;
- an orifice, wherein the orifice is configured to allow the water flow stream through the upstream check valve;
- and
- a clapper, wherein the clapper is configured to:
- allow the water flow stream through the orifice when open;
- and
- prevent the water flow stream through the orifice when in a closed position by mating with the orifice;
- a downstream check valve:
- located within the housing downstream of the upstream check valve;
- and
- including:
- a seat configured to mate with a portion of the housing;
- an orifice, wherein the orifice is configured to allow the water flow stream through the downstream check valve;
- a clapper, wherein the clapper is configured to:
- allow the water flow stream through the orifice when open;
- and
- prevent the water flow stream through the orifice when in a closed position by mating with the orifice;
- and
- a downstream shutoff valve, wherein the downstream shutoff valve is configured to allow a user to control the water flow stream through the housing;
- and
- an access port in the housing configured to provide a user with access to the upstream check valve and the downstream check valve;
- a cover:
- configured to cover the entirety of the access port;
- and
- including a portion of a lateral surface of a right cylinder;
- and
- wherein the lateral surface is non-concentric with the axis of curvature of the housing at the access port;
- wherein the radius of curvature of the cover is larger than a radius of curvature of the housing at the access port;
- a seal configured to sealingly engage the cover and the housing along the perimeter of the cover;
- and
- a mount configured to secure the cover to the housing.
34 more elements
Dependencies are inferred from the claim text.