Filter element with a luminescent marker
AssigneeHydac Filtertechnik GmbH
InventorsVolkmar Klein, Claudia Brocker
Life of this patent
Estimating the term…
Abstract
A filter element for fluid filtration, in particular for hydraulic fluid, has element components, such as pleated and multi-layer filter material (10) that extends between two end caps (26) and has a fluid-permeable supporting tube (14) forming a hollow cylinder. At least one element component of the filter element is provided at least partially with at least one luminescent material or marker such that the material or marker is excited to a characteristic, detectable wave emission when exposed to a certain exciter wave or wave spectrum.
Claims16
A filter element for fluid filtration, comprising:
- a filter mat with a first axial end;
- a fluid-permeable supporting tube being a hollow cylinder adjacent said filter mat;
- a first end cap having a recess receiving said first axial end of said filter mat;
- and
- a luminescent marker mixed in and not merely on an adhesive bed in said recess joining said first axial end of said filter mat to said first end cap, said luminescent marker being excited to a characteristic and detectable wave emission when exposed to at least one of a certain exciter wave or wave spectrum, being organic and being a fluorescent material,
- said fluorescent material including a host lattice and an activator producing an emitted wave image,
- said host lattice being made of an oxidic material,
- said activator being made of at least one of rare earth or transition metals.
A filter element for fluid filtration, comprising:
- filter element components including a tubular filter mat and end caps on axial ends of said filter mat;
- a fluid-permeable supporting tube being a hollow cylinder adjacent the filter mat;
- and
- a luminescent marker mixed directly in and not merely on an adhesive directly joining at least one of said end caps to one of said axial ends of said filter mat, said luminescent marker being excited to a characteristic and detectable wave emission when exposed to at least one of a certain exciter wave or wave spectrum, being organic and being a fluorescent material, said fluorescent material including a host lattice and an activator producing an emitted wave image, said host lattice being made of an oxidic material, said activator being made of at least one of rare earth or transition metals.
Dependencies are inferred from the claim text.