Threaded pipe coupling, union nut, connection stub, and pipe for a threaded pipe coupling
AssigneeRobert Bosch GmbH
InventorsJuergen Frasch, Stephan Wehr
Life of this patent
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Abstract
A threaded pipe coupling is disclosed which comprises a connection stub, a pipe, and a union nut, and in which any leakage quantities that occur can be carried away through the union nut.
Claims20
In a union nut for a threaded pipe coupling, having a graduated inner bore, in which a shoulder is embodied between the first portion and a second portion of the inner bore, and in which the first portion has a greater diameter than the second portion, the improvement comprising at least one indentation embodied on the shoulder, said at least one indentation extending from the first portion to the second portion.
A pipe comprising a nipple having a sealing face and a bearing face, at least one indentation embodied in the bearing face, and the at least one indentation extending from an inside diameter to an outside diameter of the bearing face.
A connection stub for a threaded pipe coupling having an inner bore, the connection stub comprising a sealing seat, a male thread, and means on the connection stub for sealing off the connection stub from a union nut.
Dependencies are inferred from the claim text.