A bonding washer for making electrical connection between two metal pieces that are to be mechanically fastened together. The washer, to be interposed between the two metal pieces, may be constructed so as to fasten to one of the pieces before the two pieces are joined. Teeth on the washer, position
A bonding washer for making electrical connection between two metal pieces that are to be mechanically fastened together. The washer, to be interposed between the two metal pieces, may be constructed so as to fasten to one of the pieces before the two pieces are joined. Teeth on the washer, positioned at right angles to the plane of the washer, are forced into each of the two metal pieces when the fastener is tightened, making electrical connection between the two metal pieces.
대표청구항▼
1. A bonding washer for making an electrical connection between two metal pieces, comprising: a substantially planar carrier;a first set of hollow, electrically conductive teeth carried by and extending away from said carrier in a first direction, each tooth of said first set having a distal edge; a
1. A bonding washer for making an electrical connection between two metal pieces, comprising: a substantially planar carrier;a first set of hollow, electrically conductive teeth carried by and extending away from said carrier in a first direction, each tooth of said first set having a distal edge; anda second set of hollow, electrically conductive teeth carried by and extending away from said carrier in a second direction substantially opposite said first direction, each tooth of said second set having a distal edge,wherein at least one tooth of said second set is substantially aligned with and electrically connected to a tooth of said first set to define at least one pair of substantially aligned, diverging, electrically connected teeth, whereby, when the metal pieces are rigidly clamped together with said at least one pair of substantially aligned, diverging, electrically connected teeth between the metal pieces, the distal edges thereof are forcibly embedded into the metal pieces to make electrical contact therewith. 2. The bonding washer of claim 1, wherein the distal edge of each tooth of said at least one pair of substantially aligned, diverging, electrically connected teeth is substantially smooth. 3. The bonding washer of claim 2, wherein the smooth distal edge of each tooth is substantially circular. 4. The bonding washer of claim 1, wherein said first and second sets of teeth comprise plural pairs of substantially aligned, diverging, electrically connected teeth. 5. The bonding washer of claim 4, wherein said first and second sets of teeth comprise at least four pairs of substantially aligned, diverging, electrically connected teeth. 6. The bonding washer of claim 5, wherein the distal edge of each tooth of said pairs of substantially aligned, diverging, electrically connected teeth is substantially smooth. 7. The bonding washer of claim 6, wherein the smooth distal edge of each tooth is substantially circular. 8. The bonding washer of claim 5, wherein said carrier is metallic and said pairs of substantially aligned, diverging, electrically connected teeth are electrically connected through the carrier. 9. The bonding washer of claim 8, wherein said carrier comprises a first layer carrying said first set of teeth and an adjacent second layer carrying said second set of teeth. 10. The bonding washer of claim 9, wherein the distal edge of each tooth of said pairs of substantially aligned, diverging, electrically connected teeth is substantially smooth. 11. A bonding washer comprising: a first set of at least two electrically conductive hollow teeth arranged in a first substantially planar array;a second set of at least two electrically conductive hollow teeth arranged in a second substantially planar array,said first and second planar arrays being substantially parallel,each of said teeth of said first set being substantially aligned with one of said teeth of said second set,said teeth of said first set extending in a first direction,said teeth of said second set extending in a second direction that is substantially opposite said first direction;a first layer of electrically conductive material interconnecting said first set of teeth;a second layer of electrically conductive material interconnecting said second set of teeth; andat least one electrically conductive bridge coupled to said first layer and to said second layer. 12. The bonding washer of claim 11, wherein said first and second planar arrays are adjacent one another and said first and second directions diverge. 13. The bonding washer of claim 12, wherein said first and second sets of teeth each comprises at least four teeth. 14. The bonding washer of claim 11, wherein said first and second directions converge. 15. A bonding washer comprising: a first electrically conductive, substantially planar layer having at least one hollow tooth extending therefrom in a first direction;a second electrically conductive, substantially planar layer having at least one hollow tooth extending therefrom in a second direction that is opposite said first direction,said at least one tooth of said first layer being substantially aligned with said at least one tooth of said second layer;an electrically conductive bridge interconnecting said first and second layers; andan opening through at least one of said planar layers through which a fastener can extend. 16. The bonding washer of claim 15, wherein said first and second planar layers are adjacent one another, and said first and second directions diverge. 17. An electrically bonded assembly comprising: a first metal piece, a second metal piece, and a bonding washer rigidly clamped between said first and second metal pieces, wherein said bonding washer includesa substantially planar carrier;a first set of electrically conductive teeth carried by and extending away from said carrier in a first direction, each tooth of said first set having an annular distal edge; anda second set of electrically conductive teeth carried by and extending away from said carrier in a second direction substantially opposite said first direction, each tooth of said second set having an annular distal edge,wherein at least one tooth of said second set is substantially aligned with and electrically connected to a tooth of said first set to define at least one pair of substantially aligned, diverging, electrically connected teeth, wherein said at least one pair of substantially aligned, diverging, electrically connected teeth are located between the metal pieces and the distal edges of said at least one pair of teeth are forcibly embedded into the metal pieces to make electrical contact therewith. 18. The electrically bonded assembly of claim 17, wherein said carrier has an opening, and further comprising a clamping fastener extending through said opening. 19. The electrically bonded assembly of claim 18, wherein said opening comprises a hole. 20. An electrically bonded assembly comprising: a first metal piece, a second metal piece, and a bonding element rigidly clamped between said first and second metal pieces, wherein said bonding element includesa metal body having a first face and a second face, said first and second faces facing away from said body in opposite directions;a first set of teeth, numbering one or more, formed on said body and extending outwardly away from said first face substantially perpendicular to a plane of said body, each tooth of said first set having a distal edge; anda second set of teeth, numbering one or more, formed on said body and extending outwardly away from said second face substantially perpendicular to said plane of said body, each tooth of said second set having a distal edge,wherein at least one tooth of said second set of teeth is substantially aligned with a tooth of said first set of teeth to define at least one pair of substantially aligned, diverging teeth, each tooth of said pair of substantially aligned teeth having a substantially annular distal edge and a hollow interior, wherein the distal edges of said first and second sets of teeth are forcibly embedded into the metal pieces to make electrical contact therewith. 21. The electrically bonded assembly of claim 20, wherein the distal edge of each tooth of each substantially aligned pair of teeth is substantially smooth. 22. The electrically bonded assembly of claim 21, wherein each pair of aligned teeth define a hole through said body. 23. An electrically bonded assembly comprising: a first metal piece, a second metal piece, a bonding washer, and a fastener rigidly clamping said first and second metal pieces together with said bonding washer therebetween, wherein said bonding washer includes a sheet metal body member havingfirst and second substantially congruent body portions folded together about a hinge portion so as to be contiguous and substantially coextensive;an opening in each of said body portions through which said clamping fastener extends, said openings being substantially coextensive and substantially aligned;a first set of teeth formed on said first body portion and extending away from said first body portion in a first direction substantially perpendicular to said first and second body portions, each tooth of said first set of teeth having a distal edge; anda second set of teeth formed on said second body portion and extending away from said second body portion in a second direction substantially opposite said first direction, each tooth of said second set of teeth having a distal edge and being substantially aligned with a respective tooth of said first set of teeth to define pairs of substantially aligned, diverging teeth, wherein the distal edges of said teeth are forcibly embedded into the metal pieces to make electrical contact therewith. 24. An electrically bonded assembly comprising: a first metal piece, a second metal piece, a bonding washer, and a fastener rigidly clamping said first and second metal pieces together with said bonding washer therebetween, wherein said bonding washer includes a metal body member havingan opening through which said fastener extends;a first body portion adjacent and substantially parallel to a second body portion;a first set of teeth, numbering one or more, formed on said first body portion and extending away from said body member in a first direction substantially perpendicular to said first and second body portions, each tooth of said first set having a distal edge; anda second set of teeth, numbering one or more, formed on said second body portion and extending away from said body member in a second direction substantially opposite said first direction, each tooth of said second set having a distal edge,wherein at least one tooth of said second set of teeth is substantially aligned with a tooth of said first set of teeth to define at least one pair of substantially aligned, diverging teeth,wherein the distal edges of said teeth are forcibly embedded into the metal pieces to make electrical contact therewith. 25. An electrically bonded assembly comprising: a first metal piece, a second metal piece, a bonding washer, and a clamping fastener rigidly clamping said first and second metal pieces together with said bonding washer therebetween, wherein said bonding washer includesa metal body having a first face and a second face, said first and second faces facing away from said body in opposite directions;an opening in said body through which said fastener extends;a first set of teeth, numbering one or more, formed on said body and extending outwardly away from said first face substantially perpendicular to a plane of said body, each tooth of said first set having a distal edge; anda second set of teeth, numbering one or more, formed on said body and extending outwardly away from said second face substantially perpendicular to said plane of said body, each tooth of said second set having a distal edge,wherein at least one tooth of said second set of teeth is substantially aligned with a tooth of said first set of teeth to define at least one pair of substantially aligned, diverging teeth, each tooth of said pair of substantially aligned teeth having a substantially annular distal edge and a hollow interior,wherein the distal edges of said teeth are forcibly embedded into the metal pieces to make electrical contact therewith. 26. An electrically bonded assembly comprising: a first metal piece, a second metal piece, a bonding washer, and a clamping fastener rigidly clamping said first and second metal pieces together with said bonding washer therebetween, wherein said bonding washer includes a metal body member havingan opening through which said fastener extends;a first body portion folded over and contiguous with a second body portion;a first set of teeth, numbering one or more, formed on said first body portion and extending away from said first body portion in a first direction substantially perpendicular to said first and second body portions, each tooth of said first set having a substantially circular distal edge; anda second set of teeth, numbering one or more, formed on said second body portion and extending away from said second body portion in a second direction substantially opposite said first direction, each tooth of said second set having a substantially circular distal edge,wherein all of said teeth are substantially uniform and at least one tooth of said second set of teeth is substantially aligned with a tooth of said first set of teeth to define at least one pair of substantially aligned, diverging teeth, wherein the distal edges of said teeth are forcibly embedded into the metal pieces to make electrical contact therewith.
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