A method for manufacturing a ceramic substrate by a 3D-printing process is described. The method comprises operating a 3D-printer to print a green-state ceramic body having a height extending to spaced apart first and second end surfaces and at least one via extending at least part-way along the height of the green-state ceramic body from the first end surface toward the second end surface. Then, the green-state ceramic body is sintered to provide the ceramic substrate with the at least one via. In cross-section, the at least one via has a square-shaped via with rounded corners.

A flange fitted around a round cylindrical condenser core of a bushing is described. The flange comprises an annular lower flange part arranged to fit around a radial shoulder of the condenser core such that a lower shoulder chamfer of the shoulder rests against lower flange chamfer of the lower flange part around the circumference of the condenser core; and an annular upper flange part fastened to the lower flange part and fits around the condenser core above an upper shoulder chamfer of the shoulder. An upper flange chamfer of the upper flange part is between an upper sealing element and a lower sealing element, forming an annular chamfer space is formed between the upper flange chamfer and the upper shoulder chamfer between the upper and lower sealing elements. The flange comprises an injection through hole for a filler material to be injected there through to fill the chamfer space.

A ceramic subassembly manufactured by a 3D-printing process is described. The ceramic subassembly comprises a ceramic substrate having a sidewall extending to spaced apart first and second end surfaces. At least one via extends through the substrate from the ceramic substrate first end surface to the ceramic substrate second end surface. In cross-section, the via has a square-shape with rounded corners.

A grommet includes: a water stop portion that has an annular shape and is inserted to a through hole formed in an attachment panel for stopping water; and a first partition wall portion and a second partition wall portion that are unit arranged to project toward a radially inner side of the water stop portion. The water stop portion includes: a first contact portion that is capable of coming into contact with a first side surface of a circumference edge portion of the through hole; a second contact portion that is capable of coming into contact with the first side surface; a groove portion formed in an annular shape between the first contact portion and the second contact portion; and a recess/protrusion portion that is formed on a circumferential wall inside the groove portion.

The invention relates to an electrical conductor for the conduction of electrical current through an opening of a housing wall, wherein the electrical conductor is enclosed, at least in a first sealing segment by a sealing body made from an elastic material. The electrical conductor can be inserted with the sealing body into an opening of a housing wall for sealing between sealing body and housing wall. The electrical conductor has a materially bonded connection to the sealing body, and a fastening part is provided on the conductor and has an axial through-opening through which the electrical conductor is inserted, wherein the fastening part extends radially, starting from the axial through-opening, in a first axial segment which has the maximum radial extension of the fastening part perpendicular to the axial through-opening. The fastening part has, on one side or two sides of the first axial segment, a second axial segment and/or a third axial segment respectively forming a radially circumferential separation region for a casting tool. The invention furthermore relates to a corresponding method for production.

A ceramic subassembly manufactured by a 3D-printing process is described. The ceramic subassembly comprises a ceramic substrate having a sidewall extending to spaced apart first and second end surfaces. At least one via extends through the substrate from the ceramic substrate first end surface to the ceramic substrate second end surface. In cross-section, the via has a square-shape with rounded corners.

A waterproof connector that is easy to design and manufacture and that can provide sufficiently close contact with respect to a through hole including a tapered opening is provided. A sealing member that provides waterproofness of the waterproof connector includes an inner tube portion and an outer tube portion, and the connector body includes a holding projection. The holding projection is configured to be inserted between the inner tube portion and the outer tube portion from a rear side in an insertion direction and configured to push the outer tube portion against an inner circumferential face of the tapered opening when the sealing member is received between the outer circumferential face of the connector body and the inner circumferential face of the tapered opening.

One aspect of the present disclosure provides a grommet that can improve water sealing property. A grommet main body according to one aspect of the present disclosure includes an opposing portion that opposes a circumferential portion of an attachment hole of a vehicle body panel and an annular seal portion that is provided in the opposing portion and is brought into tight contact with the vehicle body panel. The seal portion includes an annular first lip portion that extends from the opposing portion toward the vehicle body panel and an annular second lip portion that extends from the opposing portion toward the vehicle body panel and is provided radially inward of the first lip portion. The first lip portion is inclined radially outward toward the tip end of the first lip portion, and the second lip portion is inclined radially inward toward the tip portion of the second lip portion.

A grommet includes a ring-shaped water stop portion inserted into a through hole formed in an attachment panel and performing water stopping, a closing portion projecting toward radial inside of the water stop portion and closing a ring shape of the water stop portion, a tube portion extending in a direction crossing an axis direction of the water stop portion and provided to penetrate the closing portion and through which a wire material is inserted, and a handle portion provided in an arch shape with respect to the closing portion with a central axis of the water stop portion serving as a center.

A waterproof connector that is easy to design and manufacture and that can provide sufficiently close contact with respect to a through hole including a tapered opening is provided. A sealing member that provides waterproofness of the waterproof connector includes an inner tube portion and an outer tube portion, and the connector body includes a holding projection. The holding projection is configured to be inserted between the inner tube portion and the outer tube portion from a rear side in an insertion direction and configured to push the outer tube portion against an inner circumferential face of the tapered opening when the sealing member is received between the outer circumferential face of the connector body and the inner circumferential face of the tapered opening.