Patent ID: 7338515

Claim:
A combination for controlling airflow out of an air hose, comprising: an inlet port including a generally planar sheet of flexible material with a port opening for receiving pressurized air from an end of an air hose; and, an interface device to act between the end and the inlet port by opening the end when the end is received by the inlet port and to close the end when the end is separated from the inlet port, in which the interface device includes: a first frusto-conical section received on the end, the first frusto-conical section including a surface with at least one airflow aperture; and, a second frusto-conical section received on the first frusto-conical section the second frusto-conical section having a surface corresponding to the surface of the first frusto-conical section and at least one airflow aperture in the corresponding surface; the second frusto-conical section being rotatable with respect to the first frusto-conical section to a first position at which the at least one airflow aperture of the first frusto-conical section is aligned with the at least one airflow aperture of the second frusto-conical section to permit air to flow through the second end.