# US 8,146,225 B2 · Method of forming a clamping ring and a clamping ring

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 8,146,225 B2
- Document ID: US8146225B2
- Status: Granted
- Kind: B2
- Application number: 11/956,568
- Filed: 2007-12-14
- Published: 2009-06-18
- Granted: 2012-04-03
- Earliest claimed: 2007-12-14
- Assignees: Uponor Innovation AB
- Inventors: Kathryn Marie Olinger; Tim Cota
- Web page: https://patentgrep.com/patent/US8146225B2

## CPC

- B29C 66/1142: {Single butt to butt joints}
- B29C 48/0022: {combined with cutting}
- B29C 66/124: {Tongue and groove joints}
- B29C 66/522: {Joining tubular articles (B29C66/53241 takes precedence)}
- B29C 66/54: {Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles}
- B29C 66/742: {to metals or their alloys}
- B29D 23/003: {Pipe joints, e.g. straight joints}
- B29C 48/001: {Combinations of extrusion moulding with other shaping operations}
- B29C 48/09: Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
- B29C 48/10: flexible, e.g. blown foils
- B29C 57/02: Belling or enlarging, e.g. combined with forming a groove
- B29C 65/58: Snap connection
- B29C 65/64: Joining a non-plastics element to a plastics element, e.g. by force (B29C65/44 takes precedence)
- B29C 66/1122: {Single lap to lap joints, i.e. overlap joints (B29C66/45, B29C66/472, B29C66/52272 take precedence)}
- B29C 66/71: {characterised by the composition of the plastics material of the parts to be joined (welding bar compositions B29C65/125)}
- B29C 2793/0027: Cutting off
- B29K 2023/0691: {PEX, i.e. crosslinked polyethylene}
- B29L 2031/24: Pipe joints or couplings (B29L2031/26 takes precedence)
- Y10T 29/49789: Obtaining plural product pieces from unitary workpiece
- Y10T 29/49798: Dividing sequentially from leading end, e.g., by cutting or breaking
- Y10T 29/49995: Shaping one-piece blank by removing material
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- B29D: PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE (making granules B29B9/00; making preforms B29B11/00)
- B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

For forming a clamping ring first the pipe is extruded. The extruded pipe is cut to form a pipe part. While extruding the pipe, its inner diameter is formed smaller than the outer diameter of a pipe onto which the clamping ring is positioned before making a pipe connection. The inner diameter of the pipe part is made larger by removing material from the inside of the pipe part but only over part of the length of the pipe part such that a stop edge is formed. The clamping ring is used on a pipe when making a pipe connection.

## Claims

### Claim 1

A method of forming a clamping ring to be used on a pipe when making a pipe connection, the method comprising:
extruding a pipe from a plastic material having memory properties, whereby, while extruding the pipe, its inner diameter is formed smaller than the outer diameter of the pipe onto which the clamping ring is positioned before making the pipe connection,
cutting the extruded pipe to form a pipe part,
making the inner diameter of the pipe part larger by removing material from the inside of the pipe part but only over part of the length of the pipe part such that a stop edge is formed at one end of the pipe part, whereby the pipe part forms the clamping ring.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the material is removed by machining the inner surface of the pipe part.

### Claim 3 (depends on 2)

The method according to claim 2, wherein the machining is performed by a reaming drill.

### Claim 4 (depends on 1)

The method according to claim 1, wherein a chamfer is formed on an inlet end of the clamping ring.

### Claim 5 (depends on 4)

The method according to claim 4, wherein the chamfer is formed in the same manufacturing step as the removal of the material from the inside of the pipe part.