Bibliographic Details
| Title: |
BITE TYPE PIPE COUPLING, REFRIGERATION DEVICE, AND WATER HEATING DEVICE |
| Document Number: |
20100084861 |
| Publication Date: |
April 8, 2010 |
| Appl. No: |
12/596647 |
| Application Filed: |
May 14, 2008 |
| Abstract: |
In a center portion of the coupling body of a bite type pipe coupling, an insertion port for receiving a connector pipe is formed at an end that faces a coupling member. In the center portion, an insertion port is formed at an end located opposite to the end that faces the coupling member. An apparatus-side pipe is inserted into and brazed to the insertion port. A thin wall portion is formed in an outer circumferential wall portion of the entrance of the insertion port for receiving the apparatus-side pipe. The outer diameter of the thin wall portion is smaller than that of the coupling body. The thin wall portion is formed in a range extending from the entrance of the insertion port to a position that is located closer to the entrance than the inner end of the insertion port and is located in the vicinity of the inner end. |
| Inventors: |
Nakata, Haruo (Sakai-shi, JP); Murayama, Yoshiki (Osaka, JP); Ohgami, Isao (Osaka, JP); Haraguchi, Kazuya (Osaka, JP) |
| Assignees: |
Daikin Inustries, LTD. (Osahka-shi, JP) |
| Claim: |
1. A bite type pipe coupling characterized by a coupling body, a coupling member, a ferrule, and a cam surface, the coupling body being attached to an apparatus to which a connector pipe is connected, the coupling member being arranged around the connector pipe and coupled to the coupling body, the ferrule being tightly held between the coupling body and the coupling member, the cam surface causing a tip end of the ferrule to bite into the connector pipe, wherein, in a center portion of the coupling body, an insertion port for receiving the connector pipe is foamed at an end that faces the coupling member, and, in the center portion, an insertion port is formed at an end located opposite to the end that faces the coupling member, an apparatus-side pipe being inserted into and brazed to the insertion port, wherein a thin wall portion is formed in an outer circumferential wall portion of the entrance of the insertion port for receiving the apparatus-side pipe, the outer diameter of the thin wall portion being smaller than that of the coupling body, and wherein the thin wall portion is formed in a range extending from the entrance of the insertion port to a position that is located closer to the entrance than the inner end of the insertion port and is located in the vicinity of the inner end. |
| Claim: |
2. The bite type pipe coupling according to claim 1, characterized in that the apparatus-side pipe and the connector pipe are connected to the insertion ports by a predetermined insertion dimension by means for determining the position of the connection. |
| Claim: |
3. The bite type pipe coupling according to claim 2, characterized in that a step is formed on the inner circumferential surface of the coupling body between the insertion port for receiving the apparatus-side pipe and the insertion port for receiving the connector pipe, the step projecting radially inward so that the apparatus-side pipe and the connector pipe contact the step from both sides, wherein the height between the step and the inner circumferential surface of each insertion port is smaller than the thickness of the pipes. |
| Claim: |
4. The bite type pipe coupling according to claim 3, characterized in that a pilot hole having the same diameter as the inner diameter of the step is formed in the center portion of the coupling body prior to the machining of the insertion ports, the insertion ports being formed by machine finishing the inner circumferential surface of the pilot hole using a boring bar finishing tool, wherein the step is formed by a portion of the inner circumferential surface of the pilot hole that has not been subjected to the machine finishing by the boring bar finishing tool. |
| Claim: |
5. The bite type pipe coupling according to claim 4, characterized in that the inner diameter of the step is greater than the total height of the boring bar finishing tool including the shank and the tip, wherein the height between the step and the inner circumferential surface of each insertion port is smaller than the height of the tip of the boring bar finishing tool, and wherein the shank of the boring bar finishing tool has a cross-sectional area that secures a strength withstanding machine finishing using a boring bar tool. |
| Claim: |
6. The bite type pipe coupling according to claim 4 or 5, characterized in that the height between the step and the inner circumferential surface of the insertion port is between 0.1 mm to 0.5 mm. |
| Claim: |
7. The bite type pipe coupling according to claim 6, characterized in that a side surface of the step that faces the insertion port receiving the apparatus-side pipe is formed into an inclined surface of which the diameter increases toward the entrance of the insertion port, and wherein the side surface is formed into a shape that corresponds to the inclined surface of the tip of the boring bar finishing tool. |
| Claim: |
8. The bite type pipe coupling according to claim 2, characterized in that a projection serving as the position determining means is formed on the outer circumference of the apparatus-side pipe, wherein the projection contacts the insertion port receiving the apparatus-side pipe, so that the insertion dimension of the apparatus-side pipe becomes a predetermined dimension. |
| Claim: |
9. The bite type pipe coupling according to claim 1, characterized in that the apparatus-side pipe is a copper pipe, and the coupling body pipe is made of brass. |
| Claim: |
10. A refrigeration device being characterized in that the bite type pipe coupling according to claim 1 is used in a refrigerant circuit, in a water supply circuit, or both in the refrigerant circuit and the water supply circuit. |
| Claim: |
11. A water heating device being characterized in that the bite type pipe coupling according to claim 1 is used in a hot-water supply circuit, in a water supply circuit, or both in the hot-water supply circuit and the water supply circuit. |
| Current U.S. Class: |
285/323 |
| Current International Class: |
16 |
| Accession Number: |
edspap.20100084861 |
| Database: |
USPTO Patent Applications |
