Filter unit
AssigneeWalker Filtration Ltd
InventorsBrian Walker, Alan Hodgson
Life of this patent
Estimating the term…
Abstract
A method of producing a filter unit, such as an air/oil separator, having a tubular filter element bonded at one end to an end cap, is proposed. The method includes the steps of: providing a tubular filter element and an end cap; melting a portion of the end cap; and embedding an end of the filter element into the melted portion of the end cap. The melted portion, on cooling, solidifies to bond the tubular filter element to the end cap. The end cap can be formed of thermoplastic containing an electrically conductive filler. The end cap can be formed of a thermoplastic having a melting point of at least 180 C. The method may further include, after the embedding step, a step of forcing melted thermoplastic from the melted portion radially against a side wall of the tubular filter element.
Claims19
A method of producing a filter unit which is an oil/air separator and has a tubular filter element bonded at least one end to an end cap, the method comprising the steps of:
- providing a tubular filter element and a thermoplastic end cap;
- melting a portion of the end cap;
- and
- embedding an end of the filter element into the melted portion of the end cap;
- whereby said melted portion, on cooling, solidifies to bond the tubular filter element to the end cap.
A method of producing a filter unit having a tubular filter element bonded at least one end to an end cap, the method comprising the steps of:
- providing a tubular filter element and an electrically conductive end cap, the end cap being formed of a thermoplastic containing an electrically conductive filler;
- melting a portion of the end cap;
- and
- embedding an end of the filter element into the melted portion of the end cap;
- whereby said melted portion, on cooling, solidifies to bond the tubular filter element to the end cap.
A method of producing a filter unit having a tubular filter element bonded at least one end to an end cap, the method comprising the steps of:
- providing a tubular filter element and an end cap, the end cap being formed of a thermoplastic having a melting point of at least 180° C.;
- melting a portion of the end cap;
- and
- embedding an end of the filter element into the melted portion of the end cap;
- whereby said melted portion, on cooling, solidifies to bond the tubular filter element to the end cap.
A method of producing a filter unit having a tubular filter element bonded at least one end to an end cap, the method comprising the steps of:
- providing a tubular filter element and a thermoplastic end cap;
- melting a portion of the end cap;
- embedding an end of the filter element into the melted portion of the end cap;
- and
- forcing melted thermoplastic from said melted portion radially against a side wall of the tubular filter element;
- whereby said melted portion, on cooling, solidifies to bond the tubular filter element to the end cap.
Dependencies are inferred from the claim text.