The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 23, 1995
Filed:
Nov. 23, 1993
Pertti Puurunen, Oulu, FI;
LK-Products Oy, Kempele, FI;
Abstract
A filter construction known in the art comprises at least a number of helix resonators (1) and an insulation material plate, the projections (2a) projecting from the rectangular lower part (2) whereof are provided inside the helix resonators and thus supporting them. The filter housing (6), defined by a cover (8) and the side walls, is provided with compartments, so that each compartment includes a helical resonator. As taught by the invention, at least two guides (71) projecting from the surface are extruded in the same phase as the compartment on the inner surface of the cover, wherebetween the tip part of the projection (2a) supporting the resonator enters when the filter is assembled. The guide can be a hemisphere or a rib-like bulge.