Method of making a filler neck of radiator

Details Method of making a filler neck of radiator Method of making a filler neck of radiator

2000-03-23

2001-12-04

Cuda Rosenbaum, I (Department: 3726)

Metal working

Method of mechanical manufacture

Heat exchanger or boiler making

C029S557000

Reexamination Certificate

active

06324759

ABSTRACT:

CROSS REFERENCE TO RELATED APPLICATIONS
This application relates to and claims priority from Japanese Patent Application No. 11-89793 filed on Mar.30, 1999, the contents of which are hereby incorporated by reference.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to radiators, and particularly to a filler neck of a radiator connected to a pouring port of a header tank of the radiator.
2. Related Art
Conventionally, a radiator has a filler neck connected to a connection pipe attached to a pouring port of a header tank of the radiator. An overflow pipe connected to a reservoir of coolant through a rubber pipe and a pressure-type radiator cap are attached to the filler neck. JP-A-62-282111 discloses a radiator having a filler neck integrally formed with an overflow pipe, a connection pipe and a header tank of the radiator using resin. The filler neck has a pressure-valve sealing portion which makes contact with a pressure valve of a radiator cap attached to the filler neck. The pressure-valve sealing portion is disposed above an axis of the overflow pipe so that a height of the radiator including the radiator cap is reduced.
Recently, improvement of recycling performance of vehicle parts such as a radiator is demanded to reduce industrial waste. However, the above-mentioned radiator is made of at least two kinds of materials including metal used for a core portion of the radiator and resin used for the header tank and the filler neck. Therefore, metal parts and resin parts of the radiator may have to be divided for recycling. As a result, the number of processes for recycling the parts is increased, and recycling performance of the radiator is low.
SUMMARY OF THE INVENTION
When a filler neck is made of metal such as aluminum, it is difficult to form the filler neck into a shape substantially same as that of a resin filler neck. Therefore, when all parts of a radiator including a filler neck are made of metal, a height of the radiator including a radiator cap may become larger than that of a radiator having a resin filler neck.
In view of the foregoing problems, it is an object of the present invention to provide a metal filler neck of a radiator which reduces a height of the radiator including a radiator cap to that of a radiator having a resin filler neck.
According to the present invention, a filler neck of a heat exchanger is detachably connected to three of a pouring port of a header tank of the heat exchanger, a pipe extending in a substantially horizontal direction and a filler cap having a pressure valve for the heat exchanger. The filler neck has a cylindrical portion. The cylindrical portion includes an annular valve sealing portion which makes contact with the pressure valve, an opening formed inside an inner diameter of the valve sealing portion to communicate with the header tank, and an opening peripheral portion connected to the valve sealing portion and formed along a periphery of the opening. The opening peripheral portion is disposed above a lower end of the pipe. The filler neck is formed by pressing a metal plate.
The filler neck is readily formed by pressing a metal plate into the above-mentioned shape substantially equal in size to a resin filler neck even when the filler neck is made of metal. Therefore, a height of the heat exchanger having the metal filler neck is reduced to that of a heat exchanger having the resin filler neck. Further, since all parts of the heat exchanger including the filler neck are made of metal, recycling performance of the heat exchanger is improved.


REFERENCES:
patent: 3265048 (1966-08-01), Herbon
patent: 3809150 (1974-05-01), Holmes
patent: 4358051 (1982-11-01), Hunt
patent: 4492267 (1985-01-01), Caders
patent: 4809773 (1989-03-01), Susa et al.
patent: U-3-14057 (1991-02-01), None
patent: A-3-114657 (1991-05-01), None

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