Filters, screens, screen inserts, and methods of making same

a filter and screen technology, applied in the field of filtering, screens, screen inserts, and making methods, can solve the problems of inability to achieve the requirements of optimised cutting quality, low service life, and obstacle to optimised operations, so as to improve the filtering or screening effect and efficient operation of the cutting jet

Inactive Publication Date: 2013-08-15
INFLOTEK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes a need for an efficient process to operate a cutting jet with minimal added work. There is also a need for a process to make a filter or screen that improves filtering or screening.

Problems solved by technology

The inertia imposed due to acceleration and braking has an extremely unfavourable effect on the stability of the cutting facility and on its oscillation characteristics, so that the requirements for optimised cutting quality are ultimately not achieved.
This naturally results in significant problems; especially with the respective switch frequency as required in the production of filigree patterns.
Due to the high pressure applied, the switch valve is subject to an exceptional load, so that the service life is very low.
The resulting costs due to stoppage times to exchange the switch valve and procure it are an obstacle for optimised operations.
A functional interruption of the cutting jet is not possible with this construction.
Furthermore, the known technology teaches that merely stopping a supply of abrasive while maintaining high water pressure is ineffective and results in significant scoring of the target material being cut, even subsequent to stopping or “turning off the supply of the abrasive.

Method used

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  • Filters, screens, screen inserts, and methods of making same
  • Filters, screens, screen inserts, and methods of making same
  • Filters, screens, screen inserts, and methods of making same

Examples

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Embodiment Construction

[0040]An illustrative embodiment of the present invention relates to a filter, screen, or screen insert having increased dimensional stability. In particular, the filter, screen, or screen insert can be formed of a hard material, such as a flat sheet metal plate. The filter, screen, or screen inserts can include a plurality of finely cut through-openings having sharp edges, e.g., that possess minimal burr. In the illustrative embodiment, the through-openings are slotted through-openings that are tapered in a through direction. In general, and given the improved dimensional stability, embodiments of the present invention can be formed into a wide variety of shapes, sizes and configurations. For instance, the filter, screen, or screen insert can be shaped as a cone basket, a cylinder, a flat sheet, a plate, and as yet other shapes.

[0041]Filters, screens, and screen inserts according to embodiments of the present invention are provided with greater dimensional stability over their usab...

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Abstract

A method of making a filter or screen can include directed a high pressure cutting jet against a hard material at a plurality of positions to be cut that are separated by a portion of the material that is to remain uncut. Prior to moving from a first position to a second position, the abrasive can be replaced with a liquid or gaseous interference medium in such a way that reduces an energy density of the cutting jet from an energy density sufficient to remove or cut the material to an energy density insufficient to remove or cut the material. Once moved from the first position to the second position, the interference medium can be replaced with the abrasive in such a way that increases the energy density of the cutting jet from an energy density insufficient to remove the material to an energy density sufficient to remove the material.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation of International Application No. PCT / IB2011 / 002732, filed Sep. 16, 2011, which claims priority to, and the benefit of, co-pending European patent application number EP 10177339.8, filed Sep. 17, 2010, the entire contents of each of which are fully incorporated herein by reference.FIELD OF THE INVENTION[0002]The present invention relates to filters, screens, screen inserts, and methods of making. More particularly, the present invention relates to filters and screens having increased dimensional stability, as well as methods of their making that include formation by a cutting jet.BACKGROUND OF THE INVENTION[0003]Filters, screens, or screen inserts made of a dimensionally stable material, such as stainless steel plating, ceramic or another suitable, primarily hard material, are used in a variety of functional areas. Some specific examples include the separation of liquids and solids using various types of ...

Claims

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Application Information

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IPC IPC(8): B24C1/04B01D29/01
CPCB01D29/012B24C7/0015B24C1/045B01D29/03B01D29/0093
InventorJARCHAU, MICHAELJANITSCHEK, PAULUS ANTONIUS JACOBUS
OwnerINFLOTEK