US20030117235A1 - Electronic filter assembly - Google Patents

Electronic filter assembly Download PDF

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US20030117235A1
US20030117235A1 US10/293,726 US29372602A US2003117235A1 US 20030117235 A1 US20030117235 A1 US 20030117235A1 US 29372602 A US29372602 A US 29372602A US 2003117235 A1 US2003117235 A1 US 2003117235A1
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Prior art keywords
terminal
filter
circuit
cap
circuit board
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US10/293,726
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Michael Lamb
Martin Zelenz
Jerry Gould
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ARROW COMMUNICATION LABORATORIES Inc
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Eagle Comtronics Inc
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Priority to US09/382,064 priority Critical patent/US6323743B1/en
Priority to US85901001A priority
Application filed by Eagle Comtronics Inc filed Critical Eagle Comtronics Inc
Priority to US10/293,726 priority patent/US20030117235A1/en
Publication of US20030117235A1 publication Critical patent/US20030117235A1/en
Assigned to ARROW COMMUNICATION LABORATORIES, INC. reassignment ARROW COMMUNICATION LABORATORIES, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: EAGLE COMTRONICS, INC.
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=23507396&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US20030117235(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R24/00Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
    • H01R24/38Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts
    • H01R24/40Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts specially adapted for high frequency
    • H01R24/42Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts specially adapted for high frequency comprising impedance matching means or electrical components, e.g. filters or switches
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46Bases; Cases
    • H01R13/52Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H01R13/5213Covers
    • HELECTRICITY
    • H03BASIC ELECTRONIC CIRCUITRY
    • H03HIMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01Frequency selective two-port networks
    • H03H7/0115Frequency selective two-port networks comprising only inductors and capacitors
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00Screening of apparatus or components against electric or magnetic fields
    • H05K9/0066Constructional details of transient suppressor
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2103/00Two poles
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2201/00Connectors or connections adapted for particular applications
    • H01R2201/18Connectors or connections adapted for particular applications for television
    • HELECTRICITY
    • H03BASIC ELECTRONIC CIRCUITRY
    • H03HIMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H2250/00Indexing scheme relating to dual- or multi-band filters

Abstract

A filter assembly, comprising first and second terminal caps in opposing relation to each other. The caps are physically and electrically coupled to each other. First and second circuit boards are physically coupled to the first cap. The first circuit board includes—(i) front and rear surfaces, (ii) a first circuit located on either or both of the front and rear surfaces, (iii) a ground lead connected to the first circuit, and (iv) a first electrical terminal coupled to the first circuit. The second circuit board includes—(i) front and rear surfaces, (ii) a second circuit located on either or both of the front and rear surfaces, (iii) a ground lead connected to the second circuit, and (iv) a second electrical terminal coupled to the second circuit. The first and second circuits are electrically coupled to each other, and each are electrically coupled to the first terminal cap via the ground leads. The circuit boards are positioned substantially parallel to each other. The terminals extend into and are operatively supported inside the terminal caps, respectively.

Description

    BACKGROUND OF THE INVENTION
  • 1. Technical Field [0001]
  • The present invention relates generally to electronic filters used in the cable television industry, and relates more particularly to the construction and assembly of such filters. [0002]
  • 2. Background Art [0003]
  • Typical electronic filter constructions in the cable television (CATV) industry involve a considerable number of parts, such as, for example, one or more circuit boards, connecting wires or leads, filter circuit components, isolation plates, blocks or chambers, input and output terminals, moisture barrier seals or plugs, connector housings, sub-housings or caps, o-rings, outer housing sleeves, and potting material. This elaborate array of parts constrains efforts to: minimize the size and weight of the filters; reduce material and labor costs associated with assembly of the filters; and simplify and automate the assembly process. Examples of such filter constructions are shown and described in: U.S. Pat. No. 5,278,525 to Palinkas; U.S. Pat. No. 4,901,043 to Palinkas; U.S. Pat. No. 4,701,726 to Holdsworth; U.S. Pat. No. 4,451,803 to Holdsworth et al; U.S. Pat. No. 3,579,156 to Parfitt; and U.S. Pat. No. 3,065,434 to Calderhead. [0004]
  • For such CATV filters as highpass and lowpass filters, diplex filters, windowed highpass filters, and step attenuator (or return path) filters, tunable filter circuits and shielding between filter components and circuits are not normally required. Thus, for these types of filters, an opportunity is presented to simplify filter components, construction and assembly. U.S. Pat. No. 5,745,838 to Tresness and Zelenz (Zelenz is a named inventor of the present invention) discloses (FIGS. [0005] 8-10) a filter construction for a return path filter called a “step attenuator.” This construction is also shown in FIG. 2 herein, as representing the prior art construction for this type of filter. While simplification was achieved in U.S. Pat. No. 5,745,838, the construction still required two major o-rings around the male and female terminal caps and an outer housing sleeve (See FIG. 2 herein); and, manual assembly of these parts was still required.
  • Many diplex, windowed highpass, and return path filters (See, e.g., embodiments shown in FIGS. [0006] 1-5 of U.S. Pat. No. 5,745,838), have dual (or “parallel”) circuit paths. For example, FIG. 1, herein, shows a simplified step attenuator circuit 10 containing a forward (or highpass) path 12 and a return (or lowpass) path 14. Cascaded or elongated circuit board arrangements such as shown in U.S. Pat. No. 5,770,983 to Zennamo, Jr. et al., U.S. Pat. No. 4,901,043 to Palinkas, U.S. Pat. No. 4,701,726 to Holdsworth, U.S. Pat. No. 4,451,803 to Holdsworth et al., U.S. Pat. No. 3,579,156 to Parfitt, and U.S. Pat. No. 3,065,434 to Calderhead, are not optimum platforms for such dual path filters. A more optimum platform would be to have two circuit boards disposed in a parallel arrangement.
  • U.S. Pat. No. 5,278,525 to Palinkas discloses parallel circuit boards for a CATV notch filter (or “trap”), rather than for a dual path filter. The construction includes a considerable number of extra parts, such as an isolation shield, circuit board housings, tuning screw housings, o-rings, and an outer housing sleeve. [0007]
  • In most CATV applications, the filters are installed in an outdoor environment. Thus, it is important that the filter construction be moisture resistant. Efforts to make filters moisture resistant have included enclosing the filter in an outer housing sleeve and employing o-rings between the filter and the outer housing sleeve. See, e.g., U.S. Pat. No. 5,745,838 to Tresness et al., U.S. Pat. No. 5,278,525 to Palinkas, U.S. Pat. No. 4,701,726 to Holdsworth, and U.S. Pat. No. 4,451,803 to Holdsworth et al. Such an approach requires the additional parts and expense of o-rings and outer housing sleeves, and may require manual assembly of such parts. [0008]
  • A prime path for moisture penetration into the filter is through the terminal fittings or connectors. While efforts to prevent moisture penetration through filter connectors (such as disclosed in U.S. Pat. No. 5,278,525 to Palinkas) have been satisfactory, there remains a need to improve moisture resistance through these connector paths. [0009]
  • Another consideration in CATV filter construction is to establish a good and reliable electrical ground between the filter circuit or circuits and the filter housing. Electrical ground has been established by soldering or fitting isolation shields or blocks between the circuit boards and the filter housing, or by soldering wires or leads between the circuit board and housing. See, for example, U.S. Pat. No. 4,701,726 to Holdsworth. However, such methods usually require additional components or manual assembly steps. [0010]
  • OBJECTS AND SUMMARY OF THE INVENTION
  • It is therefore an object of the present invention to provide an electronic filter construction that avoids the limits and problems associated with the prior art. [0011]
  • It is another object of the present invention to provide an electronic filter construction that is more suitable for automated assembly than previous filter constructions. [0012]
  • It is a further object of the present invention to provide an electronic filter construction that-requires less parts than previous filter constructions. [0013]
  • It is still another object of the present invention to reduce material and labor costs associated with the assembly of an electronic filter; [0014]
  • It is still a further object of the present invention to reduce the size and weight of an electronic filter; [0015]
  • It is yet another object of the present invention to provide an electronic filter construction that is optimum for dual (or parallel) path filter circuits; [0016]
  • It is yet a further object of the present invention to provide an electronic filter construction that establishes an effective and reliable ground connection between the filter's circuitry and the filter housing; and [0017]
  • It is still yet another object of the present invention to provide an electronic filter construction that has improved moisture resistance. [0018]
  • These and other objects are attained in accordance with the present invention wherein there is provided a filter assembly, comprising (1) a first terminal cap, (2) a second terminal cap, (3) a first circuit board, and (4) a second circuit board. The first and second terminal caps are disposed along a longitudinal axis in opposing relation to each other. The terminal caps are physically and electrically coupled to each other. [0019]
  • Both circuit boards are physically coupled to the first terminal cap. The first circuit board includes—(i) front and rear surfaces, (ii) a first filter circuit located on either or both of the front and the rear surfaces, (iii) a ground contact electrically coupled to the first filter circuit and to said first terminal cap, and (iv) a first filter terminal coupled to the first circuit. The second circuit board includes—(i) front and rear surfaces, (ii) a second filter circuit located on either or both of the front and the rear surfaces, (iii) a ground contact electrically connected to the second filter circuit and to said first terminal cap, and (iv) a second filter terminal coupled to the second circuit. The first and second circuits are electrically coupled to each other, and each circuit is electrically coupled to the first terminal cap via the ground contacts such that the circuits have a common ground through the first terminal cap. [0020]
  • The first and second circuit boards are positioned substantially parallel to each other and to the longitudinal axis, between the terminal caps. The front surface of the first circuit board substantially faces the front surface of the second circuit board. The first and second terminals extend into and are operatively supported inside the first and second terminal caps, respectively. [0021]
  • In a modified embodiment, the filter assembly of the present invention may include only a single circuit board physically coupled to the first terminal cap. In such an embodiment, the single circuit board would include—(i) front and rear surfaces, (2) a filter circuit located on either or both of the front and rear surfaces, (iii) a ground contact electrically coupled to the filter circuit and to the first terminal cap, and (iv) first and second filter terminals electrically coupled to the filter circuit. The filter circuit is electrically coupled to the first terminal cap via the ground lead, such that the circuit is grounded through the first terminal cap. The single circuit board is positioned substantially parallel to the longitudinal axis, between the terminal caps. The first and second terminals extend into and are operatively supported inside the first and second terminal caps, respectively. [0022]
  • In an alternative embodiment, a filter assembly is provided, which comprises—(1) first and second terminal caps, (2) a filter circuit, (3) first and second filter terminals, (4) first and second sealing members, and (5) an o-ring. The first and second terminal caps are arranged in opposing relation to each other. The first cap is directly connected to the second cap to form a filter housing which defines an interior volume. The first cap contains an external groove, and the connection between the first and second caps is substantially sealed by solder received in the groove. The caps contain first and second terminal passages, respectively, between the interior volume and the exterior of the filter assembly. [0023]
  • A filter circuit is mounted inside the filter housing. The filter terminals are electrically coupled to the filter circuit. The first and second terminals extend through and are operatively supported inside the first and second terminal passages, respectively. The first sealing member is secured in and substantially closes the first terminal passage. The first sealing member contains a hole through which the first terminal tightly fits. The second sealing member is secured in and substantially closes the second terminal passage. The second sealing member contains a hole through which the second terminal tightly fits. The o-ring is seated inside the second terminal passage, between the second sealing member and the second terminal cap.[0024]
  • BRIEF DESCRIPTION OF THE DRAWING
  • Further objects of the present invention will become apparent from the following description of the preferred embodiment with reference to the accompanying drawing, in which: [0025]
  • FIG. 1 is a schematic diagram of a dual-path filter circuit; [0026]
  • FIG. 2 is a longitudinal cross-sectional view of a filter constructed in accordance with the teachings of the prior art; [0027]
  • FIG. 3A is a longitudinal cross-sectional view of a filter constructed in accordance with the present invention; [0028]
  • FIG. 3B is an enlarged cross-sectional view of the circled area in FIG. 3A; [0029]
  • FIG. 4 is an exploded view of the filter shown in FIG. 3A; [0030]
  • FIG. 5 is an exploded view showing a modification to the filter of FIG. 4; and [0031]
  • FIG. 6 is an exploded view showing another modification to the filter of FIG. 4.[0032]
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
  • The filter assembly of the present invention is especially suited for dual (or parallel) path filter circuits. As understood in the art, dual path circuits include at least two separate circuit paths. Examples of dual path filters are diplex, windowed highpass, and some step attenuator filters. Referring now to FIG. 1, there is shown a schematic of a dual path filter circuit [0033] 10, having a highpass circuit path 12 and a lowpass circuit path 14. Circuit 10 is a simplified version of a step attenuator circuit described in U.S. Pat. No. 5,745,838 to Tresness et al., incorporated herein by reference. The present invention is not limited to filter assemblies for any particular filter circuit. Circuit 10 is presented only as an example of a dual path circuit. An understanding of circuit 10 is not necessary for an understanding of the present invention.
  • FIG. 2 shows a sectional view of a conventional filter construction. The construction includes a female terminal cap [0034] 16, a male terminal cap 18, an elongated circuit board 20, a female terminal 22, a male terminal 24, o-rings 26 and 28, and an outer housing sleeve 30. Terminal caps 16 and 18 are soldered together by way of a solder ring 32. Female terminal 22 is connected to a female connector assembly 34 which includes a sealing member 36. Male terminal 24 extends through an internally threaded fitting 38 contained in cap 18. Terminal 24 is tightly fitted through a sealing wafer 40 secured inside cap 18. The filter shown in FIG. 2 is of the type that does not require shielding or tunable filter components. As a result, low profile, surface mounted filter components 42 are used. It is apparent from FIG. 2 that this conventional construction produces an enormous amount of wasted internal space, and the elongated shape of circuit board 20 constrains efforts to reduce the length of the filter.
  • The conventional filter construction of FIG. 2 is contrasted markedly by the filter construction of the present invention, shown in FIG. 3A. FIG. 3A depicts the preferred embodiment of the present invention. It does not include the outer housing sleeve and accompanying o-rings. The elimination of these parts simplifies the assembly and allows the filter manufacturer to adopt a more automated assembly process. [0035]
  • The preferred construction will now be described in detail with reference to FIGS. 3A, 3B and [0036] 4. A filter 50 includes a female terminal cap 52 and a male terminal cap 54. Caps 52 and 54 are disposed along a longitudinal axis L, in opposing relation to each other. Caps 52 and 54 are made of any suitable conductive metal typically used in the filter industry. Cap 52 includes a cylindrical portion 56 having an extension or crimping sleeve 58. Cylindrical portion 56 extends to cap 54, and sleeve 58 is crimped around cap 54, to form a filter housing with an interior volume 60 (FIG. 3A). Cap 54 contains an external circumferential groove 62 (FIGS. 3A and 4). Caps 52 and 54 are sealed together using a solder ring 64 received in groove 62. A circumferential solder joint is established with ring 64, by way of induction soldering. The solder joint also establishes a good electrical ground connection between caps 52 and 54. Induction soldering is preferred because it can be implemented as an automated assembly step. As a result of the above-described crimping and soldering, a secure physical and electrical connection is established between caps 52 and 54.
  • Female terminal cap [0037] 52 includes a fitting portion 66 containing external threads 67 and a terminal passage 68. Male terminal cap 54 includes a fitting portion 70 containing internal threads 71 and a terminal passage 72. Passages 68 and 72 each establish a passageway between interior volume 60 and the exterior of filter 50.
  • As shown in FIG. 3A, a pair of filter circuit boards [0038] 74, 76 are enclosed in interior volume 60. Circuit boards 74, 76 are arranged substantially parallel to each other and to longitudinal axis L. In this disclosure and in the claims, the term “parallel” is not intended to mean precisely parallel. The term includes orientations that may produce acute angles between the circuit boards.
  • As best shown in FIG. 4, circuit board [0039] 74 includes—(i) front and rear surfaces 78, 79, (ii) a filter circuit 80 located on front surface 78, (iii) a pair of ground contacts 82, 83 electrically connected to circuit 80, and (iv) a terminal 84 electrically coupled to circuit 80. Circuit board 76 includes (i) front and rear surfaces 86, 87, (ii) a filter circuit 88 located on front surface 86, (iii) a pair of ground contacts 90, 91 electrically connected to circuit 88, and (iv) a terminal 92 electrically coupled to, circuit 88. It is preferred that another, corresponding pair of ground contacts be located on the rear surfaces of boards 74, 76, respectively (see corresponding contacts 82 a, 83 a and 90 a, 91 a in FIG. 4). These corresponding pairs of contacts are likewise electrically connected to their respective filter circuits (80, 88). Circuit 80 is connected to circuit 88 by way of jumper wires 93 a, 93 b (FIG. 4), to form a complete filter circuit (such as shown in FIG. 1). Circuits 80, 88 are preferably implemented with all surface mounted filter components, including fixed-tuned chip (ceramic medium) inductors and/or ferrite core inductors.
  • Dual filter circuit [0040] 10 (FIG. 1) can be neatly arranged on circuit boards 74, 76, as indicated by the broken lines in FIG. 1 As represented in FIG. 1, circuit board 74 contains circuit path 14 which is embodied in circuit 80, and circuit board 76 contains circuit path 12 which is embodied in circuit 88. These paths are joined together by jumper wires 93 a, 93 b (FIG. 1). It is to be noted that the present invention is not limited to dual path circuits or to the separation of dual circuit paths on respective circuit boards. Any operable arrangement may be employed. When we refer to a “filter circuit” or “circuit” on a circuit board, in this disclosure and in the claims, it is intended to mean any arrangement of a circuit component or circuit components, whether or not constituting a complete or identifiable filter circuit. The example presented in this disclosure is merely to illustrate the suitability of the parallel circuit board arrangement (of the present invention) to a dual path circuit.
  • Circuit boards [0041] 74, 76 are mounted directly to male terminal cap 54. As best shown in FIG. 4, circuit boards 74, 76 have mating ends 75, 77, respectively, and the ground contacts are located at the mating ends. Terminal cap 54 contains two pairs of opposed notches 94 a, 94 b and 94 c, 94 d. For the purpose of this disclosure and the claims, the term “groove” shall include is its normally intended meanings and, in addition, it shall include notch pairs, such as notch pairs 94 a, 94 b and 94 c, 94 d. Thus, e.g., notch pair 94 a, 94 b may be properly referred to herein as groove 94 a, 94 b. Grooves 94 a, 94 b and 94 c, 94 d are configured to receive, in a tight press fit, the mating ends of circuit boards 74, 76, respectively. This tight press fit secures the circuit boards in position.
  • Circuits [0042] 80, 88 are electrically coupled to terminal cap 54 via the ground contacts, and thus establish a common electrical ground for circuits 80, 88. Ground contacts 82, 82 a and 83, 83 a are in registration and direct contact with notches 94 a and 94 b, respectively, and ground contacts 90, 90 a and 91, 91 a are in registration and direct contact with notches 94 c and 94 d, respectively. Each of the ground contacts is coated with solder when circuit boards 74, 76 are produced. The solder coating ensures a tight fit between the contacts and the notches. In fact, during assembly, the some of the solder is sheared off during insertion of boards 74, 76 into notches process 94 a, 94 b and 94 c, 94 d. The ground contacts are soldered to the notches by induction soldering (another automated assembly step). This arrangement establishes a good ground connection between the circuit boards and cap 54.
  • Terminal [0043] 92 is a male connector terminal which extends through and is operatively supported inside terminal passage 72. A potting wafer 95, made of low density polyethylene, is inserted into and substantially closes off terminal passage 72. Wafer 95 contains an open bore through which terminal 92 tightly fits. Once installed, wafer 95 seals passage 72, substantially preventing moisture from entering filter 50 through passage 72.
  • Terminal [0044] 84 includes a female terminal assembly 96 which extends through and is operatively supported inside terminal passage 68. Terminal assembly 96 includes a female connector element or collet terminal 96 a, an polypropylene insulator 96 b containing an external o-ring groove 96 c (FIG. 4), and an o-ring 96 d seated in groove 96 c. Assembly 96 is inserted into and substantially closes off terminal passage 68. Insulator 96 b and o-ring 96 d, together, seal passage 68, substantially preventing moisture from entering the filter between passage 68 and insulator 96 b. Insulator 96 b contains an open bore through which collet terminal 96 a tightly fits.
  • As shown in FIG. 3B, collet terminal [0045] 96 a has a pair circumferential (360°), protruding barbs or ribs 98. Collet 96 a is press fitted through the bore of insulator 96 b, causing barbs 98 to penetrate and anchor into insulator 96 b (FIG. 3B). “Penetration” of barbs 98 may or may not include breaking into the insulator material—typically, the barbs will penetrate the insulator by deforming the insulator material. The barbs, and their penetration into the insulator, help prevent moisture from entering filter 50, between the bore of insulator 96 b and collet 96 a.
  • As shown in FIGS. 3B and 4, insulator [0046] 96 b has a cone-shaped nose 99, which allows o-ring 96 d to be easily slipped over the insulator and seated in groove 96 c. This cone-shape allows o-ring 96 d to be installed on the insulator by an automated assembly step. In some filter constructions, it may be preferable to have collet 96 a extend through the insulator to the point where it is flush with an insulator face 96 e (See FIG. 3B) The construction, as above-described, may eliminate the need for potting material inside the filter, in most applications.
  • Referring now to FIG. 5, there is shown a modification to the embodiment of FIG. 4. Like parts are indicated by like reference numbers, increased by 100. The modification concerns t-he placement of printed circuit inductors on the rear surface of each circuit board. As shown in FIG. 5, circuits [0047] 180, 188 each include a pair of printed inductors 180 a, 180 b and 188 a, 188 b, respectively, etched on respective rear surfaces 179 and 187. Inductors 180 a, 180 b and 188 a, 188 b may serve, for example, as inductors L3, L4 and L1, L2, respectively, in the circuit shown in FIG. 1. In this embodiment, the capacitors of circuits 180, 188 would remain on the front surfaces of circuit boards 174, 176. The embodiment of FIG. 5 is otherwise the same as the embodiment of FIGS. 3A, 3B and 4.
  • Referring now to FIG. 6, there is shown another modification of the embodiment of FIG. 4. Like parts are indicated by like reference numbers, increased by 200. In some applications, it may be desirable to have a certain degree of electromagnetic shielding between circuit boards. This can be achieved by locating the filter circuits on the rear surfaces of the circuit boards and locating ground planes on the front surfaces of the boards. As shown in FIG. 6, circuits [0048] 280, 288 are located on rear surfaces 279, 287, respectively, and ground planes 281, 289 are located on the front surfaces of boards 274, 276, respectively. The ground planes provide shielding between circuits 280, 288. Ground planes 281, 289 are grounded by their direct physical contact with notches 294 a, 294 b and 294 c, 294 d, respectively, when boards 274, 276 are seated in the notches. Thus, separate ground contacts are not necessary on the front surfaces of the boards. As shown in FIG. 6, ground contacts 282 a, 283 a and 290 a, 291 a are located on the rear surfaces of boards 274 and 276, respectively.
  • A circular opening [0049] 281 a is contained in ground plane 281 to allow terminal 284 to be connected to board 274 without shorting to ground. A similar opening is provided in ground plane 289 for terminal 292. Openings are also contained in the ground planes to accommodate jumper wires 293 a, 293 b. The embodiment of FIG. 6 is otherwise the same as the embodiment of FIGS. 3A, 3B and 4.
  • While the preferred embodiment of the invention has been particularly described in the specification and illustrated in the drawing, it should be understood that the invention is not so limited. Many modifications, equivalents, and adaptations of the invention will become apparent to those skilled in the art without departing from the spirit and scope of the invention. [0050]

Claims (25)

What is claimed is:
1. A filter assembly, comprising:
first and second terminal caps disposed along a longitudinal axis in opposing relation to each other, said first and said second terminal caps being physically and electrically coupled to each other;
a first circuit board physically coupled to said first terminal cap, said first circuit board including—(i) front and rear surfaces, (ii) a first filter circuit located on either or both of the front and the rear surfaces, (iii) a ground contact electrically coupled to the first filter circuit and to said first terminal cap, and (iv) a first filter terminal electrically coupled to the first filter circuit; and
a second circuit board physically coupled to said first terminal cap, said second circuit board including—(i) front and rear surfaces, (ii) a second filter circuit located on either or both of the front and the rear surfaces, (iii) a ground contact electrically coupled to the second filter circuit and to said first terminal cap, and (iv) a second filter terminal electrically coupled to the second filter circuit,
the first and the second filter circuits being electrically coupled to each other, and each of the circuits being electrically coupled to said first terminal cap via the ground contacts such that the circuits have a common electrical ground through the first terminal cap,
said first and said second circuit boards being positioned substantially parallel to each other and to the longitudinal axis between said first and said second terminal caps, the front surface of said first circuit board substantially facing the front surface of said second circuit board,
the first terminal extending into and being operatively supported inside said first terminal cap, and the second terminal extending into and being operatively supported inside said second terminal cap.
2. The filter assembly of claim 1, wherein said first and said second circuit boards are directly connected to said first terminal cap.
3. The filter assembly of claim 1, wherein said first and said second circuit boards are mated with said first terminal cap, to establish a secure physical and electrical connection.
4. The filter assembly of claim 3, wherein said first and said second circuit boards each include a mating end, the ground contacts of said first and said second circuit boards being located at the mating ends, respectively, and wherein said first terminal cap contains first and second grooves configured to receive, in a tight press fit, the mating ends of said first and said second circuit boards, respectively, whereby the tight press fit secures said first and said second circuit boards in position.
5. The filter assembly of claim 4, wherein said first circuit board includes a plurality of ground contacts electrically connected to the first filter circuit, the ground contacts being located at the mating end of the first circuit board and being in direct physical contact with the first groove of said first terminal cap.
6. The filter assembly of claim 5, wherein said second circuit board includes a plurality of ground contacts electrically connected to the second filter circuit, the ground contacts being located at the mating end of the second circuit board and being in direct physical contact with the second groove of said first terminal cap.
7. The filter assembly of claim 1, wherein the first filter circuit is located on the front surface of said first circuit board, and wherein the second filter circuit is located on the front surface of said second circuit board.
8. The filter assembly of claim 1, wherein a metal ground plane is situated on the front surface of said first circuit board, and wherein the first filter circuit is located on the rear surface of said first circuit board, whereby the ground plane establishes a certain degree of electromagnetic shielding between the first and the second filter circuits.
9. The filter assembly of claim 1, wherein a metal ground plane is situated on the front surface of said second circuit board, and wherein the second filter circuit is located on the rear surface of said second circuit board, whereby the ground planes of said first and said second circuit boards establish a certain degree of electromagnetic shielding between the first and the second filter circuits.
10. The filter assembly of claim 1, wherein the first filter circuit includes a plurality of inductors, and wherein at least one of the inductors is printed on either the front or the rear surface of said first circuit board.
11. The filter assembly of claim 1, wherein the first circuit includes a plurality of inductors and a plurality of capacitors, and wherein the plurality of inductors are printed on the rear surface and the plurality of capacitors are located on the front surface of said first circuit board.
12. The filter assembly of claim 11, wherein the second circuit includes a plurality of inductors and a plurality of capacitors, and wherein the plurality of inductors are printed on the rear surface and the plurality of capacitors are located on the front surface of said second circuit board.
13. The filter assembly of claim 1, wherein said second terminal cap extends to and is directly connected to said first terminal cap, to form a filter housing which encloses said first and said second circuit boards in an interior volume.
14. The filter assembly of claim 13, wherein the connection between said second and said first terminal caps is substantially sealed by solder received in a groove contained in said first cap.
15. The filter assembly of claim 13, wherein said first terminal cap contains a first terminal passage between the interior volume of the filter housing and the exterior of said filter assembly, the first terminal extending through the first terminal passage, and wherein said first terminal cap includes a sealing member secured in and substantially closing the first passage, said sealing member containing a hole through which the first terminal tightly fits.
16. The filter assembly of claim 15, wherein said second terminal cap contains a second terminal passage between the interior volume of the filter housing and the exterior of said filter assembly, the second terminal extending through the second terminal passage, and wherein said second terminal cap includes a sealing member secured in and substantially closing the second passage, said sealing member containing a hole through which the second terminal tightly fits.
17. The filter assembly of claim 16, wherein the sealing member of said second terminal cap is an elongated insulator, and wherein the second filter terminal is a collet terminal.
18. The filter assembly of claim 17, further comprising an o-ring seated inside said second terminal passage, between the insulator and said second terminal cap.
19. The filter assembly of claim 17, wherein said collet terminal has a barb protruding therefrom, which penetrates the insulator from inside the hole of the insulator.
20. A filter assembly, comprising:
first and second terminal caps disposed along a longitudinal axis in opposing relation to each other, said first and said second terminal caps being physically and electrically coupled to each other; and
a circuit board mated with said first terminal cap, said circuit board including—(i) front and rear surfaces, (ii) a filter circuit located on either or both of the front and the rear surfaces, (iii) a ground contact electrically coupled to the circuit and to said first terminal cap, and (iv) first and second filter terminals electrically coupled to the circuit,
the filter circuit being electrically coupled to said first terminal cap via the ground contact, such that the circuit is grounded through the first terminal cap, said circuit board being positioned substantially parallel to the longitudinal axis between said first and said second terminal caps, the first and the second terminals extending into and being operatively supported inside said first and said second terminal caps, respectively.
21. A filter assembly, comprising:
first and second terminal caps arranged in opposing relation to each other, said first cap being directly connected to said second cap to form a filter housing which defines an interior volume, said first cap containing an external groove, and the connection between said first and said second caps being substantially sealed by solder received in the groove, said first and said second caps containing first and second terminal passages, respectively, between the interior volume and the exterior of said filter assembly;
a filter circuit mounted inside said filter housing;
first and second filter terminals electrically coupled to said filter circuit, said first and said second terminals extending through and being operatively supported inside the first and the second terminal passages, respectively;
a first sealing member secured in and substantially closing the first terminal passage, said sealing member containing a hole through which the first terminal tightly fits;
a second sealing member secured in and substantially closing the second terminal passage, said second sealing member containing a hole through which the second terminal tightly fits; and
an o-ring seated inside said second terminal passage, between the second sealing member and said second terminal cap.
22. The first assembly of claim 21, wherein said second filter terminal is a collet terminal having a barb protruding therefrom, said barb penetrating said second sealing member from inside the hole of said second sealing member.
23. An electronic filter assembly of the type that includes a female terminal cap having a fitting portion and containing a terminal passage through the fitting portion, and a collet assembly secured in and substantially closing the terminal passage of said female terminal cap, wherein said collet assembly comprises:
an insulator, made from a single piece of insulator material, containing a bore therethrough;
a collet terminal extending through the bore of the insulator; and
a seal located inside the terminal passage of said female terminal cap, between the collet terminal and said female terminal cap.
24. The electronic filter assembly of claim 23, wherein the collet terminal has at least one barb which penetrates the insulator material of the insulator, to help prevent moisture from entering said filter housing between the bore of the insulator and the collet terminal.
25. The electronic filter assembly of claim 23, wherein the insulator of said collet assembly has a substantially cone-shaped nose portion.
US10/293,726 1999-08-24 2002-11-13 Electronic filter assembly Abandoned US20030117235A1 (en)

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US09/382,064 US6323743B1 (en) 1999-08-24 1999-08-24 Electronic filter assembly
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US10/293,726 US20030117235A1 (en) 1999-08-24 2002-11-13 Electronic filter assembly

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US10/213,904 Abandoned US20020186101A1 (en) 1999-08-24 2002-08-07 Electronic filter assembly
US10/293,726 Abandoned US20030117235A1 (en) 1999-08-24 2002-11-13 Electronic filter assembly
US10/721,492 Active US6888423B2 (en) 1999-08-24 2003-11-25 Electronic filter assembly
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105932975A (en) * 2016-06-14 2016-09-07 安徽省宁国天成电工有限公司 Complete filter unit for inhibiting radio-frequency interference of household refrigerator
US10029107B1 (en) * 2017-01-26 2018-07-24 Cardiac Pacemakers, Inc. Leadless device with overmolded components

Families Citing this family (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7321485B2 (en) 1997-04-08 2008-01-22 X2Y Attenuators, Llc Arrangement for energy conditioning
US7336468B2 (en) 1997-04-08 2008-02-26 X2Y Attenuators, Llc Arrangement for energy conditioning
US9054094B2 (en) 1997-04-08 2015-06-09 X2Y Attenuators, Llc Energy conditioning circuit arrangement for integrated circuit
US7301748B2 (en) 1997-04-08 2007-11-27 Anthony Anthony A Universal energy conditioning interposer with circuit architecture
US6323743B1 (en) * 1999-08-24 2001-11-27 Tresness Irrevocable Patent Trust Electronic filter assembly
TWI271924B (en) 2001-01-31 2007-01-21 Eagle Comtronics Inc Two-tiered tuned filter
US6784760B2 (en) * 2002-11-06 2004-08-31 John Mezzalingua Associates, Inc. Step attenuator using frequency dependent components and method of effecting signal attenuation
US6794957B2 (en) * 2002-12-03 2004-09-21 John Mezzalingua Associates, Inc. CATV filter assembly with improved electrical grounding
US6933806B2 (en) * 2003-01-08 2005-08-23 Eagle Comtronics, Inc. Electrical signal filter with solderless ground connection
EP1698033A4 (en) 2003-12-22 2010-07-21 X2Y Attenuators Llc Internally shielded energy conditioner
US20050162238A1 (en) * 2004-01-23 2005-07-28 Chung-Shun Ho Structure of a wave filter
US8095098B2 (en) * 2004-06-01 2012-01-10 Time Warner Cable Inc. Apparatus and methods for network interface and spectrum management
US20060150232A1 (en) * 2004-12-30 2006-07-06 Karpati George S Tap bypass assembly
JP2006236907A (en) * 2005-02-28 2006-09-07 Alps Electric Co Ltd Electric component with connector
US7817397B2 (en) 2005-03-01 2010-10-19 X2Y Attenuators, Llc Energy conditioner with tied through electrodes
WO2006104613A2 (en) 2005-03-01 2006-10-05 X2Y Attenuators, Llc Conditioner with coplanar conductors
US7414196B2 (en) * 2005-06-13 2008-08-19 John Mezzalingua Associates, Inc. Casing for RF filter
US7683739B2 (en) * 2005-06-21 2010-03-23 Sure-Fire Electrical Corporation Signal filter assembly with impedance-adjusting characteristic
US7323951B2 (en) * 2005-07-13 2008-01-29 John Mezzalinqua Associates, Inc. Casing for CATV filter
DE602005008737D1 (en) * 2005-08-05 2008-09-18 3M Innovative Properties Co Overvoltage protection module and assembly of at least one telecommunications module and at least one overvoltage protection module
DE102005046445A1 (en) * 2005-09-28 2007-03-29 Epcos Ag Band-pass filter for use in e.g. wireless LAN module, has signal branches forming resonator that propagates wave modes with amplitude equations, and wave resulting at output gate for locking frequencies and corresponding to equations
ES2337066T3 (en) * 2005-09-30 2010-04-20 3M Innovative Properties Company Telecommunications outlet, an assembly including a telecommunications module and a plug and a method of manufacturing a plug.
US8026777B2 (en) 2006-03-07 2011-09-27 X2Y Attenuators, Llc Energy conditioner structures
US8545235B2 (en) 2006-08-25 2013-10-01 Ppc Broadband, Inc. Torque transmitting housing for CATV filter
US7255599B1 (en) 2006-08-31 2007-08-14 John Mezzalingua Associates, Inc. Impedance matched waterproof connector for CATV filter housing
US20080149611A1 (en) * 2006-12-22 2008-06-26 Roth Michael W Wire feeder packaging and transport system
TWI328318B (en) * 2007-03-23 2010-08-01 Ind Tech Res Inst Connector with filter function
US9399263B2 (en) 2007-08-31 2016-07-26 Hobart Brothers Company Portable battery powered welder
US7898357B2 (en) * 2008-05-12 2011-03-01 Andrew Llc Coaxial impedance matching adapter and method of manufacture
US8476555B2 (en) * 2008-08-29 2013-07-02 Illinois Tool Works Inc. Portable welding wire feed system and method
US8022785B2 (en) * 2008-12-03 2011-09-20 Arcom Digital, Llc Step attenuator circuit with improved insertion loss
FR2950488B1 (en) * 2009-09-24 2012-10-19 Eads Defence & Security Sys Electronic device
JP2011198566A (en) * 2010-03-18 2011-10-06 Sumitomo Wiring Syst Ltd Charging connector
CN201829747U (en) * 2010-04-19 2011-05-11 富士康(昆山)电脑接插件有限公司 Cable connector assembly
US20130196539A1 (en) * 2012-01-12 2013-08-01 John Mezzalingua Associates, Inc. Electronics Packaging Assembly with Dielectric Cover
US9246275B2 (en) * 2012-04-04 2016-01-26 Holland Electronics, Llc Coaxial connector with ingress reduction shielding
US9711919B2 (en) 2012-04-04 2017-07-18 Holland Electronics, Llc Coaxial connector with ingress reduction shielding
US9178317B2 (en) * 2012-04-04 2015-11-03 Holland Electronics, Llc Coaxial connector with ingress reduction shield
US9960542B2 (en) 2012-04-04 2018-05-01 Holland Electronics, Llc Coaxial connector with ingress reduction shielding
US20130330944A1 (en) * 2012-06-07 2013-12-12 Andrew Llc Spring-loaded blind-mate electrical interconnect
JP6325901B2 (en) * 2014-05-30 2018-05-16 矢崎総業株式会社 Method of assembling

Family Cites Families (58)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2813144A (en) 1950-12-20 1957-11-12 Amphenol Electronics Corp Coaxial angle connector
US2762025A (en) 1953-02-11 1956-09-04 Erich P Tilenius Shielded cable connectors
US2981920A (en) 1959-03-16 1961-04-25 Kings Electronics Inc Cable clamp
US3065434A (en) 1959-10-02 1962-11-20 Bird Electronic Corp Filter
US3170748A (en) 1962-01-17 1965-02-23 Nu Line Ind Inc Coaxial cable connector
US3332052A (en) 1965-02-26 1967-07-18 United Carr Inc Electrical connector component with grounding crown contact
US3522485A (en) 1967-11-21 1970-08-04 Automatic Radio Mfg Co Modular circuit construction
US3579156A (en) 1968-08-15 1971-05-18 Worcester Controls Corp Shielded filter
GB1289312A (en) 1968-11-26 1972-09-13
US3681739A (en) 1970-01-12 1972-08-01 Reynolds Ind Inc Sealed coaxial cable connector
IT1043823B (en) * 1970-11-03 1980-02-29 Prephar A process for the extraction of nucleic acids from animal organs
US3678444A (en) 1971-01-15 1972-07-18 Bendix Corp Connector with isolated ground
US3854789A (en) 1972-10-02 1974-12-17 E Kaplan Connector for coaxial cable
US4063201A (en) * 1973-06-16 1977-12-13 Sony Corporation Printed circuit with inductively coupled printed coil elements and a printed element forming a mutual inductance therewith
US3954321A (en) 1975-08-13 1976-05-04 The United States Of America As Represented By The United States Energy Research And Development Administration Miniature electrical connector
US4097894A (en) 1976-11-01 1978-06-27 Tanner Electronics Systems Technology, Inc. Secured scramble decoder filter
US4373767A (en) 1980-09-22 1983-02-15 Cairns James L Underwater coaxial connector
US4451803A (en) 1982-06-23 1984-05-29 Eagle Comtronics, Inc. Split tuning filter
US4444454A (en) 1982-09-13 1984-04-24 Hi-G Incorporated Field installable coaxial plug connector
US4668043A (en) 1985-01-16 1987-05-26 M/A-Com Omni Spectra, Inc. Solderless connectors for semi-rigid coaxial cable
US4575274A (en) 1983-03-02 1986-03-11 Gilbert Engineering Company Inc. Controlled torque connector assembly
US4666228A (en) 1983-09-28 1987-05-19 Pave Technology Co. Hermetic connector and method
US4616900A (en) 1984-04-02 1986-10-14 Lockheed Corporation Coaxial underwater electro-optical connector
JPH0312433B2 (en) 1984-06-27 1991-02-20 Nippon Electric Co
US4637674A (en) 1985-05-17 1987-01-20 Amp Incorporated Annular connector seal
DE3522736C1 (en) 1985-06-25 1987-02-19 Spinner Gmbh Elektrotech A device for pressure-tight connecting the outer conductor of a coaxial line
US4701726A (en) 1985-12-03 1987-10-20 Northeast Filter Co., Inc. Trap filter assembly
US4824399A (en) 1987-06-19 1989-04-25 Amp Incorporated Phase shifter
US4901043A (en) 1987-07-02 1990-02-13 Andrew F. Tresness Compact filter having a multi-compartment housing
US4799904A (en) 1987-07-29 1989-01-24 Mill-Max Mfg. Corp. Compliant tail connector
US4843155A (en) * 1987-11-19 1989-06-27 Piotr Chomczynski Product and process for isolating RNA
US4857006A (en) 1988-06-30 1989-08-15 Western Atlas International, Inc. Quick change electrical coupling
DE3823469A1 (en) 1988-07-11 1990-01-18 Bodenseewerk Geraetetech A filter assembly
US4890199A (en) 1988-11-04 1989-12-26 Motorola, Inc. Miniature shield with opposing cantilever spring fingers
US5234809A (en) * 1989-03-23 1993-08-10 Akzo N.V. Process for isolating nucleic acid
US5055060A (en) 1989-06-02 1991-10-08 Gilbert Engineering Company, Inc. Tamper-resistant cable terminator system
US5179877A (en) 1989-06-02 1993-01-19 Gilbert Engineering Company, Inc. Tamper-resistant cable terminator system
US5010183A (en) * 1989-07-07 1991-04-23 Macfarlane Donald E Process for purifying DNA and RNA using cationic detergents
US5150087A (en) * 1989-11-30 1992-09-22 Mitsumi Electric Co., Ltd. Electrical signal filter and method for manufacture of electrical signal filter internal circuit board
US4964805A (en) * 1990-01-03 1990-10-23 Amp Incorporated Microcoxial connector having bipartite outer shell
US5088937A (en) * 1991-04-19 1992-02-18 Amp Incorporated Right angle coaxial jack connector
DE69301089T2 (en) * 1992-02-14 1996-06-05 Itt Ind Ltd electrical connector
US5278525A (en) 1992-06-11 1994-01-11 John Mezzalingua Assoc. Inc. Electrical filter with multiple filter sections
TW326596B (en) 1992-09-22 1998-02-11 Eagle Comtronics Inc Reduced length tuned filter
JPH0654313U (en) 1992-12-29 1994-07-22 ミツミ電機株式会社 Electrical signal filter
US5300635A (en) * 1993-02-01 1994-04-05 University Of Iowa Research Foundation Quaternary amine surfactants and methods of using same in isolation of nucleic acids
US5295864A (en) 1993-04-06 1994-03-22 The Whitaker Corporation Sealed coaxial connector
US5409398A (en) 1993-06-16 1995-04-25 Molex Incorporated Lighted electrical connector adapter
FR2711852B1 (en) 1993-10-22 1996-01-05 Framatome Connectors Internal female electrical contact of the socket type.
TW242716B (en) 1993-11-22 1995-03-11 Eagle Comtronics Inc Filter structure with self-sealing collet assembly
GB9514641D0 (en) * 1995-07-18 1995-09-13 Whitaker Corp Elecgtronics box coaxial connection assembly
US5658171A (en) 1995-10-27 1997-08-19 The Whitaker Corporation Sealed coaxial feedthrough connector
US5668408A (en) * 1996-04-12 1997-09-16 Hewlett-Packard Company Pin grid array solution for microwave multi-chip modules
US5745838A (en) 1997-03-14 1998-04-28 Tresness Irrevocable Patent Trust Return path filter
US6323743B1 (en) * 1999-08-24 2001-11-27 Tresness Irrevocable Patent Trust Electronic filter assembly
US6273766B1 (en) * 2000-09-08 2001-08-14 Eagle Comtronics, Inc. Electronic device including a collet assembly with dual receiving sockets
TWI271924B (en) * 2001-01-31 2007-01-21 Eagle Comtronics Inc Two-tiered tuned filter
US6737935B1 (en) * 2002-12-03 2004-05-18 John Mezzalingua Associates, Inc. Diplex circuit forming bandstop filter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105932975A (en) * 2016-06-14 2016-09-07 安徽省宁国天成电工有限公司 Complete filter unit for inhibiting radio-frequency interference of household refrigerator
US10029107B1 (en) * 2017-01-26 2018-07-24 Cardiac Pacemakers, Inc. Leadless device with overmolded components

Also Published As

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US6888423B2 (en) 2005-05-03
US20040104788A1 (en) 2004-06-03
US20050001697A1 (en) 2005-01-06
US6323743B1 (en) 2001-11-27
US20020186101A1 (en) 2002-12-12
US6674343B2 (en) 2004-01-06
US20010040488A1 (en) 2001-11-15

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