Patent ID: 7442220

Claim:
An assembly for collecting material that is entrained in a gas stream, which comprises: a. a housing having a head part and a body part, and inlet and outlet ports for the gas that is to be filtered, in which at least one of the ports (the “chamber port ”) is provided in the head part which has internal walls which define a primary chamber within the head part having a first end communicating with the chamber port and an opening at a second end, in which the axes of the first and second ends of the primary chamber are non-aligned, and b. a flow conduit device having a first end which can fit into the primary chamber in the head part of the housing through the opening at the second end so that it is directed generally towards the chamber port in the housing and a second end which is directed towards the body part of the housing to provide a conduit for gas to flow between the body part of the housing and the outlet port, the flow conduit device being configured to have a smooth, continuous transition between the first end and second end of the flow conduit device to reduce turbulence in the flow of gas within the said chamber between the chamber port and the body part of the housing resulting from the non-alignment of the said axes, in which the assembly includes a seal between the wall of the primary chamber at or towards the second end thereof and the flow conduit device at the second end thereof.