Pipe joint for driving pipes laid underground by the driving technique
AssigneeHalbergerhutte GmbH
InventorHans-Georg Hein
Life of this patent
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Abstract
A pipe joint is described for driving pipes laid underground by the driving technique and having an inner pipe made of cast iron to which the force of pressure is applied during driving, wherein each driving pipe is constructed from the inner cast iron pipe formed without a socket and a coaxially disposed outer casing forming a lost casing for an intermediate layer of cement-containing material between the inner and outer pipes. The pipe joint has at least one seal ring disposed on a protruding portion of the inner cast iron pipe.
Claims17
A pipe joint for driving pipes laid underground by the driving technique and having an inner pipe to which the force of pressure is applied during driving, comprising:
- at least one pair of adjacent driving pipes, each said driving pipe constructed from an inner pipe having a generally uniform diameter along its length and a coaxially disposed outer casing, said outer casing having a greater diameter than said inner pipe and being disposed to form an annular space for an intermediate layer of cement mortar-like material between said inner pipe and said outer casing;
- said inner pipe of at least one of said adjacent driving pipes having a protruding end protruding beyond said intermediate layer;
- said inner pipe of a second of said driving pipes having a recessed end recessed within at least one of said intermediate layer and said outer casing, defining a protruding portion of said second driving pipe, said protruding end and said recessed end being positioned in abutting alignment with each other;
- the joint having at least one seal ring circumscribing said protruding end of said inner pipe of said one driving pipe and being overlapped by said protruding portion of said second driving pipe.
A pipe joint for driving pipes laid underground by the driving technique and having an inner pipe to which a pressure force is applied during driving, comprising:
- at least two adjacent driving pipes, each said driving pipe having an inner pipe, a coaxially disposed outer casing with a diameter greater than the inner pipe diameter so that a space is defined between said inner pipe and said outer casing, and an intermediate layer of cement mortar-like material interposed between said inner pipe and said outer casing;
- said inner pipe of one of said driving pipes having a protruding end protruding beyond said intermediate layer;
- the joint having at least one seal ring circumscribing said protruding end and being overlapped by a protruding portion of said adjacent driving pipe;
- a distance ring disposed between said adjacent driving pipes;
- said inner pipes of said adjacent driving pipes being disposed flush with each other and defining a gap therebetween;
- and
- a float mounted ring float mounted proximate the gap at the joint between said inner pipes, said float mounted ring having a protruding tongue engaging the ends of said inner pipes at said gap and said ring being made of a softer material than said inner pipes.
Dependencies are inferred from the claim text.