Abstract: A check valve assembly is disclosed which is inserted in a fluid flow conduit leading from a source of fluid flow to a mechanism utilizing the fluid flow. The check valve assembly comprises a housing having an inlet port and an outlet port that communicate with a central chamber in the housing, and a valve disposed in the central chamber adapted to permit fluid flow from the inlet port through the chamber to the outlet port and prevent fluid flow from the outlet port through the chamber to the inlet port. The housing comprises a first attachment piece associated with the inlet port and adapted to be attached to the fluid flow conduit leading from the source of fluid flow, and a second attachment piece associated with the outlet port and adapted to be attached to one of several adapter elements. Various types of adapter elements are disclosed which include sections for connecting the adapter element to the second attachment piece and to the fluid flow conduit leading to the mechanism utilizing the fluid flow.

Abstract: A check valve assembly is disclosed comprising an upper housing section having an inlet port, a first outer rim portion and a platform section adjacent the outer rim portion, and a lower housing section having an outlet port and a second outer rim portion, the second rim portion extending adjacent the first rim portion and abutting the platform portion when the upper and lower housing sections are melted together, the first rim portion maintaining the melted portions of the upper and lower housing sections within the housing, the upper and lower housing sections being configured to facilitate the melting process.

Abstract: The invention is directed to a compact noise abatement muffler for an internal combustion engine. The muffler includes a housing having a plurality of chambers and fluid conductors for enabling the exhaust gases passing through the muffler to achieve at least 4 changes of direction of gas flow. The muffler of the invention is capable of reducing the sound pressure level of the exhaust gases between the input and exhaust ports of the muffler in the range of 10-25 decibels.

Abstract: An air line to pipe connector is formed from a saddle containing two bolt openings, a U-bolt with two threaded ends fitting into the bolt openings, a connector element sitting onto the saddle at an aperture in the saddle, and nuts which tighten to attach and secure the connector to a drilled hole in a pipe. The connector element has a tapered pipe for fitting into the hole in the pipe, and a connector end for attachment to an air line.