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US 10,239,002 B2Granted
Filter material for fluids and method for producing a filter material
AssigneeHydac Filtertechnik GmbH
InventorsMatthias Schwender, Andreas Schmitz, Edwin Koch
Life of this patent
Estimating the term…
Abstract
A filter material (2) for fluids, in particular hydraulic fluids, includes a filter medium (4) having at least one layer, and a supporting structure (6) partially made of a plastic material and resting flatly in some surface areas on at least one side of the filter medium (4). The filter medium (4) and the supporting structure (6) are connected to one another by laminating, covering and/or by a melting process.
Claims17
A hydraulic fluid filter material, comprising:
- a filter medium made of a polyester nonwoven and configured for and capable of filtering hydraulic oil, said filter medium having at least one layer;
- and
- a support structure made of a polybutylene terephthalate plastic material and adjoining at least one side of said filter medium in surface regions of said filter medium, said filter medium being joined to said support structure by coating;
- and
- an additional coating on said filter medium partially covering at least some of passage openings defined by said support structure, said additional coating being a spray application of adhesive spots of different sizes and in an irregular arrangement on said filter medium.
2 more elements
A method for producing a hydraulic fluid filter material, comprising the steps of:
- forming a filter medium made of a polyester nonwoven and configured for and capable of filtering hydraulic oil, said filter medium having at least one layer and at least one side,
- joining flat a support structure made of a polybutylene terephthalate plastic in regions of the one side of the filter medium by coating, and
- applying adhesive spots of different sizes and in an irregular arrangement on the filter medium partially covering at least some of fluid passage openings dictated by the support structure by a spray application.
A hydraulic filter material, comprising:
- a filter medium configured for and capable of filtering hydraulic oil, said filter medium having at least one layer, said filter medium including nonwoven polyester threads with intermediate spaces and having a coating closing most of said intermediate spaces, said coating being a spray application of adhesive spots of different sizes and in an irregular arrangement on said filter medium;
- and
- a support structure made of a polybutylene terephthalate plastic and adjoining at least one side of said filter medium in surface regions of said filter medium, said filter medium being joined to said support structure by said coating.
Dependencies are inferred from the claim text.