초록 ▼

A pressure cap having a generally cylindrical hollow body with a semispherical cap having an orifice defined within and passing through said cap, a valve stem passing through and of smaller cross-section than the orifice, a valve member supported by the valve stem within the hollow body, a valve sea

A pressure cap having a generally cylindrical hollow body with a semispherical cap having an orifice defined within and passing through said cap, a valve stem passing through and of smaller cross-section than the orifice, a valve member supported by the valve stem within the hollow body, a valve seat surrounding the inner end of the orifice and upon which the valve member is normally seated so as to close the orifice, and mateable threading to attach to an existing pipe, or attach by frictional fit. It may also have a rubberized flange to fit over a drain line for pressuring a drain and any of a variety of valve stem configurations to accommodate different pump systems and access requirements. Further, a method for clearing an obstructed pipe using a pressure cap as disclosed. In another embodiment a balloon is positioned within the pipe to receive pressurized air until bursting, thereby sending a blast of air down the pipe to clear obstructions.

대표청구항 ▼

I claim: 1. A pressure cap comprising: a. a generally cylindrical hollow body having an inner cavity with a cap having an orifice defined within and passing through said cap for sealable engagement of a valve; b. the valve including a valve stem passing through and of smaller cross-section than the

I claim: 1. A pressure cap comprising: a. a generally cylindrical hollow body having an inner cavity with a cap having an orifice defined within and passing through said cap for sealable engagement of a valve; b. the valve including a valve stem passing through and of smaller cross-section than the orifice; c. Upper and lower pressure sealable valve members integrally formed with said valve stem and supported by the valve stem; wherein said valve stem is normally seated on the cap so as to close the orifice when said upper and lower members are positioned on opposite sides of the orifice and create an air tight seal between outside the cap and the inner cavity upon application of air pressure on the lower valve member. 2. The pressure cap as claimed in claim 1 wherein said valve is a Schrader valve. 3. The pressure cap as claimed in claim 1 wherein said valve is permanently affixed in said orifice. 4. The pressure cap as claimed in claim 1 further comprising threading on the inside diameter of said cylindrical hollow body for reciprocal engagement to a pipe. 5. A pressure cap comprising: a. a generally cylindrical hollow body having an inner cavity with a cap having an orifice defined within and passing through said cap for sealable engagement of a valve; b. the valve including a valve stem passing through and of smaller cross-section than said orifice; c. Upper and lower pressure sealable valve members integrally formed with said valve stem and supported by the valve stem; wherein said valve stem is normally seated on the cap so as to close the orifice when said upper and lower members are positioned on opposite sides of create an air tight seal between outside the cap and the inner cavity upon application of air pressure on the lower valve member; and e. An extended flange connected to said cylindrical body opposite said cap having a rubberized sleeve around said flange. 6. A pressure cap as claimed in claim 5 further comprising an elongated tube connecting said valve seat and said valve stem. 7. A pressure cap as claimed in claim 5 wherein said valve is threadably connected to said cap. 8. A pressure cap as claimed in claim 5 wherein said valve is fixedly attached to said cap. 9. A pressure cap as claimed in claim 5 wherein said body engages a pipe by frictional engagement between the inner diameter of said body and the outer diameter of said pipe. 10. A pressure cap as claimed in claim 1 wherein said body engages a pipe by frictional engagement between the inner diameter of said body and the outer diameter of said pipe.