Abstract: A sealing system for an outlet of a plastic-lined cylinder has a plastic liner outlet extending into a bore of a boss. An insert is engageable with the bore, forming a primary seal between the insert and portion of the liner outlet. Further, a tapered compression surface of the insert engages a tapered bore portion of the liner outlet adjacent the primary seal for compressing the liner outlet and closing any annular assembly clearance at the primary seal for obviating opportunity for seal extrusion under pressure. An axial position in the boss, and dimensional integrity, of the liner outlet is maintained by engaging an annular distal end of the liner outlet in the bore by a stop. The stop can be integral with the boss. Reverse extrusion of the primary seal due to trapped gas and rapid decompression of the cylinder can be defeated by providing a leak path.

Abstract: A sealing system for an outlet of a plastic-lined cylinder has a plastic liner outlet extending into a bore of a boss. An insert is engageable with the bore, forming a primary seal between the insert and portion of the liner outlet. A tapered compression surface of the insert engages a tapered bore portion of the liner outlet adjacent the primary seal forming a tapered interface and a secondary seal. An axial position in the boss, and dimensional integrity, of the liner outlet is maintained by engaging an annular distal end of the liner outlet in the bore by a stop. The stop can be formed on the insert.

Abstract: A sealing system for an outlet of a plastic-lined cylinder has a plastic liner outlet extending into a bore of a boss. An insert is engageable with the bore, forming a primary seal between the insert and portion of the liner outlet. Further, a tapered compression surface of the insert engages a tapered bore portion of the liner outlet adjacent the primary seal for compressing the liner outlet and closing any annular assembly clearance at the primary seal for obviating opportunity for seal extrusion under pressure. An axial position in the boss, and dimensional integrity, of the liner outlet is maintained by engaging an annular distal end of the liner outlet in the bore by a stop. The stop can be integral with the boss. Reverse extrusion of the primary seal due to trapped gas and rapid decompression of the cylinder can be defeated by providing a leak path.

Abstract: A system and method are provided for damping a vibrating surface, such as a drumhead, of a percussion instrument by attaching a patch made from a viscoelastic urethane polymer to an exterior face of the vibrating surface. Such a patch has a self-adhesive quality and may be attached by contacting the vibrating surface. In one embodiment, the patch has a tapered edge that serves to improve the quality of the bond between the patch and the surface.

Abstract: A frameless system for mounting pressure vessels to a structure comprising fiber-reinforced (FRP) brackets and parallel brackets arranged orthogonally at each neck end of one or more pressure vessels. The brackets are stiff to accept inertial loads imposed by the pressure vessels and are flexible enough to permit longitudinal expansion of the pressure vessels. Each bracket preferably has a profile comprising a base, a tubular portion extending from the base and a web extending from the tubular portion. The pressure vessel's neck end is connected to the web through an attachment secured to the web which transfers loads from the pressure vessel into the bracket's web.

Abstract: A frameless system for mounting pressure vessels to a structure comprising fiber-reinforced (FRP) brackets and parallel brackets arranged orthogonally at each neck end of one or more pressure vessels. The brackets are stiff to accept inertial loads imposed by the pressure vessels and are flexible enough to permit longitudinal expansion of the pressure vessels. Each bracket preferably has a profile comprising a base, a tubular portion extending from the base and a web extending from the tubular portion. The pressure vessel's neck end is connected to the web through an attachment secured to the web which transfers loads from the pressure vessel into the bracket's web.