Dielectric filter

Description

FIG. 1 is a top plan view of a first embodiment of the piezoelectric filter of the present invention;

FIG. 2 is a front elevation view of the piezoelectric filter depicted in FIG. 1;

FIG. 3 is a right side elevation view of the piezoelectric filter depicted in FIG. 1;

FIG. 4 is a left side elevation view of the piezoelectric filter depicted in FIG. 1;

FIG. 5 is a bottom plan view of the piezoelectric filter depicted in FIG. 1;

FIG. 6 is a rear view of the piezoelectric filter depicted in FIG. 1;

FIG. 7 is a cross-sectional view of the piezoelectric filter depicted in FIG. 1 taken along the line 7--7 in FIG. 1;

FIG. 8 is a cross-sectional view of the piezoelectric filter depicted in FIG. 2 taken along the line 8--8 in FIG. 2;

FIG. 9 is a perspective view showing the upper and front side surfaces of the piezoelectric filter depicted in FIG. 1;

FIG. 10 is a perspective view showing the lower and rear surfaces of the piezoelectric filter depicted in FIG. 1;

FIG. 11 is a perspective view showing the upper and front side surfaces of the piezoelectric filter of a second embodiment of the present invention;

FIG. 12 is a perspective view showing the lower and rear surfaces of the piezoelectric filter depicted in FIG. 11;

FIG. 13 is a perspective view showing the upper and front side surfaces of the piezoelectric filter of a third embodiment of the present invention;

FIG. 14 is a perspective view showing the lower and rear surfaces of the piezoelectric filter depicted in FIG. 13;

FIG. 15 is a perspective view showing the upper and front side surfaces of the piezoelectric filter of a fourth embodiment of the present invention;

FIG. 16 is a perspective view showing the lower and rear surfaces of the piezoelectric filter depicted in FIG. 15;

FIG. 17 is a perspective view showing the upper and front side surfaces of the piezoelectric filter of a fifth embodiment of the present invention;

FIG. 18 is a perspective view showing the lower and rear surfaces of the piezoelectric filter depicted in FIG. 17;

FIG. 19 is a perspective view showing the upper and front side surfaces of the piezoelectric filter of a sixth embodiment of the present invention;

FIG. 20 is a perspective view showing the lower and rear surfaces of the piezoelectric filter depicted in FIG. 19;

FIG. 21 is a perspective view showing the upper and front side surfaces of the piezoelectric filter of a seventh embodiment of the present invention;

FIG. 22 is a perspective view showing the lower and rear surfaces of the piezoelectric filter depicted in FIG. 21;

FIG. 23 is a perspective view showing the upper and front side surfaces of the piezoelectric filter of an eighth embodiment of the present invention;

FIG. 24 is a perspective view showing the lower and rear surfaces of the piezoelectric filter depicted in FIG. 23;

FIG. 25 is a perspective view showing the upper and front side surfaces of the piezoelectric filter of a ninth embodiment of the present invention;

FIG. 26 is a perspective view showing the lower and rear surfaces of the piezoelectric filter depicted in FIG. 25;

FIG. 27 is a top plan view of a tenth embodiment of the piezoelectric filter of the present invention;

FIG. 28 is a front elevation view of the piezoelectric filter depicted in FIG. 27;

FIG. 29 is a side elevation view of the piezoelectric filter depicted in FIG. 27;

FIG. 30 is a bottom plan view of the piezoelectric filter depicted in FIG. 27;

FIG. 31 is a rear view of the piezoelectric filter depicted in FIG. 27;

FIG. 32 is a cross-sectional view of the piezoelectric filter depicted in FIG. 27 taken along the line 32--32 in FIG. 27;

FIG. 33 is a perspective view showing the upper and front surfaces of the piezoelectric filter depicted in FIG. 27;

FIG. 34 is a perspective view showing of an eleventh embodiment of the piezoelectric filter of the present invention, the bottom, rear and left side being the same as the tenth embodiment except for the central channel on the bottom surface; and,

FIG. 35 is a perspective view showing of a twelfth embodiment of the piezoelectric filter of the present invention, the bottom, rear and left side being the same as the tenth embodiment.

Claims

The ornamental design for a piezoelectric filter, as shown and described.

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Inventors:	Ito; Kenji (Nagoya, JP)
Assignee:	NGK Spark Plug Co., Ltd. (Aichi, JP)
Appl. No.:	D/015,945
Filed:	December 2, 1993

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Foreign Application Priority Data

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Jun 2, 1993 [JP]			5-16211
Jun 2, 1993 [JP]			5-16212
Jun 2, 1993 [JP]			5-16213
Jun 16, 1993 [JP]			5-18106
Jun 16, 1993 [JP]			5-18107
Jun 16, 1993 [JP]			5-18108
Jun 23, 1993 [JP]			5-18917
Jun 23, 1993 [JP]			5-18918
Jun 23, 1993 [JP]			5-18919

Current U.S. Class:	D13/123; D13/182
Field of Search:	;D13/123,182 ;333/202,204,206,208,219 ;174/52.1,52.4,260

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References Cited [Referenced By]

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U.S. Patent Documents

4431977	February 1984	Sokola et al.
4703291	October 1987	Nishikawa et al.
4733208	March 1988	Ishikawa et al.
4795992	January 1989	Saito et al.
4806889	February 1989	Nakano et al.
4890079	December 1989	Sasaki
4965537	October 1990	Kommrusch
5208566	May 1993	Kenoun et al.

Foreign Patent Documents

	563987		Oct 1993		EP
	405152803		Jun 1993		JP

Primary Examiner: Sincavage; Joel
Attorney, Agent or Firm: Larson and Taylor