Pall Corporation

Michael Ernest Grimes

Richard Guy Gutman

Kenneth Roy Weight

Roger A Buttery

George Brandwood Peacock

Nicholas Lloyd Yoward

Nigel J Cook

A filter assembly comprises a filter () defining path for fluid passing to or from the filter (). An adaptor () is connected to the filter () and provides a continuation of the path. The adaptor () is for mounting the filter () on a mounting plate () and carries one or more sealing rings () that are engageable with the mounting plate (). The adaptor () is made from a plastics material and one surface of the adaptor () is reinforced by contact with an annular reinforcing member () which may be of metal, particularly steel. This allows the flow path provided by the adaptor () to be maximized.

Filter assemblies

A cylindrical filter is formed from a sheet of filter material which includes two connected layers of filter media. Opposed edges of the sheet are joined to form the cylinder by separating the media adjacent the edges and then sealing together the first of the separated layers followed by sealing the second of the separated layers. The two seals are spaced inwardly of the edges and are spaced from one another. In this way, failure of one seal does not result in failure of the cylindrical filter.

Cylindrical filters

Cylindrical filters and their manufacture

A porous filter medium is formed by a pleated cylinder of a depth filter medium. An absolute rated inner filtration layer is arranged between upstream and downstream drainage layers. The depth filter medium is formed from a continuous sleeve. Additionally or alternatively at least the downstream drainage layer may be formed integrally with at least a part of an inner filtration layer. The material of the medium may be a fibrous mass of non-woven synthetic polymeric micro-fibres which are free of fibre-to-fibre bonding and are secured to each other by mechanical entanglement or intertwining, with the diameter of the fibrous structure varying across the medium.

Depth filter media

Growing community of inventors

Hayling Island, United Kingdom

Michael Ernest Grimes