Filter with filtration envelope spacing means
AssigneeFiltertek Inc.
InventorHayden Leason
Life of this patent
Estimating the term…
Abstract
A fluid filter for use in a fluid system wherein fluid is forced through the filter by a suction source connected to the filter outlet is disclosed. In addition to a housing defining a volume, with an inlet and an outlet, and a filtration media envelope inside said volume, the filter further includes an envelope spacing means to support the envelope against collapse, and fluid flow spacing means between the housing and the envelope. In a preferred embodiment, the envelope spacing means comprises a grid assembly inside the envelope, connected to the housing inlet to maintain proper positioning.
Claims23
A fluid filter for use in a system wherein fluid is forced through the filter by a suction source connected to the filter outlet, the filter comprising:
- (a) a housing to define an enclosed volume with a filter inlet and outlet wherein said outlet leads to the suction source;
- (b) a filtration media envelope inside said volume having an envelope inlet connected to said filter inlet such that fluid entering said filter inlet directly enters the filtration media envelope;
- (c) envelope spacing means within said filtration media envelope to support said envelope against collapse;
- and
- (d) fluid flow spacing means between said housing and said envelope providing a fluid flow path such that fluid entering said envelope inlet and filtering through said filtration media flows to said outlet.
A fluid filter for use in a system wherein fluid is forced through the filter by suction created by a pump connected to the filter outlet, the filter comprising:
- (a) a pair of generally concave pan members having peripheral edges fastened in opposed relation and respective base surfaces spaced from each other to form an enclosed volume;
- (b) fluid flow spacer means integral with each of said pan member base surfaces and projecting into said volume;
- and
- (c) an inlet and outlet to said volume with a sheet of filtration material interposed therebetween inside said volume and disposed so as to create an envelope whereby
- (i) the opening to said envelope is coincident to said filter inlet such that fluid entering the filter inlet directly enters the filtration material envelope,
- (ii) facing sheet sections of said envelope are supported against contact with said pan member base surfaces by said integral fluid flow spacer means, and
- (iii) said facing sheet sections of said velope are supported against contact with each other by envelope spacer means within said envelope.
An automatic transmission fluid filter, designed for use with a pump which draws the fluid from a sump through the filter, the filter comprising:
- (a) a pair of cup-shaped plastic pan members having peripheral edges fastened in opposed relation and respective generally flat base walls spaced from each other to form an enclosed volume;
- (b) fluid flow spacer means integrally molded with each of said pan member base walls and projecting into said volume;
- (c) an inlet and outlet to said volume with a sheet of filtration material interposed therebetween inside said volume, said sheet being folded upon itself with
- (i) its non-folded edges sealingly captured between said opposed peripheral edges of said pan members such that the folded edge of said sheet is disposed within said volume and is spaced from the opposed peripheral edges of said pan members,
- (ii) facing sections of said folded sheet being supported against contact with said pan members by said fluid flow spacer means, and
- (iii) said sheet having an opening sealingly fastened to said filter volume inlet to admit fluid entering said filter directly into the space within said folded sheet;
- and
- (d) an envelope spacer grid within said folded sheet, supporting facing sections of said folded sheet against contact with each other.
Dependencies are inferred from the claim text.