Temperature fuse protection device

• US 7,639,114 B2
• Filed: 11/22/2006
• Issued: 12/29/2009
• Est. Priority Date: 11/22/2006
• Status: Expired due to Fees

• Current Assignee: Tsung-Mou Yu
• Original Assignee: Tsung-Mou Yu
• Inventors: Yu, Tsung-Mou
• Primary Examiner(s): Gandhi; Jayprakash N
• Assistant Examiner(s): Thomas; Bradley H
• Application Number:
  US11/562,904
• Publication Number:
  US 20080117016A1
• Time in Patent Office: 1,133 Days
• Field of Search: 337/401, 337/403, 337/405, 337/4, 337/142, 361/104, 296/23
• US Class Current: 337/405
• CPC Class Codes: H01H 2037/762 using a spring for opening the circuit when the fusible element melts
• CPC Class Codes: H01H 2037/763 the spring being a blade spring
• CPC Class Codes: H01H 37/761 with a fusible element forming part of the switched circuit H01H37/767 takes precedence
• CPC Class Codes: H01H 85/04 Fuses, i.e. expendable parts of the protective device, e.g. cartridges
• CPC Class Codes: H01H 85/36 Means for applying mechanical tension to fusible member
• CPC Class Codes: Y10T 29/49107 Fuse making

Abstract

A temperature fuse protection device uses a hot melt metal to rivet for connecting two terminals in the circuit that are separated for making the two terminals electrically-connected and the circuit complete. There is a spacing in between the two free ends of the two terminals when no external force is being imposed. When an electric overloading or high circuit temperature event occurs, the hot melt metal would be heated to melt and break, which would then make the free ends of the two terminals to be disconnected, and therefore, the circuit will be at “OFF” status.

Claims

1. A temperature fuse protection device, comprising:

two terminals,

a hot melt metal, and

an elastic connecting unit, wherein an attachment assembly for the two terminals is established in a circuit, and a spacing is maintained between free ends of the two terminals when no external force is imposed, and a through hole is formed in at least one free end of the two terminals for allowing the hot melt metal to pass through, and wherein the hot melt metal is strip-shaped, and having the characteristics of breaking when heated or under elevated temperature, and wherein the elastic connecting unit, comprising two connecting bars, is connecting the two terminals and making them electrically-connected, and at least one end of the two connecting bars formed with an open hole for passing through, and wherein when assembled, the hot melt metal of proper length is put through the open hole at the end of a first connecting bar of the two connecting bars and the through hole in the free end of a first terminal of the two terminals, and using a riveting method for impacting the hot melt metal, the two ends of the hot melt metal are enlarged, and are connecting a free end of a first terminal with a first connecting bar of a elastic connecting unit, and pressing a second connecting bar of the two connecting bars of the elastic connecting unit against the first connecting bar for achieving a tight fit and coupling together, both terminals forming an electrical connection, and the ends of both connecting bars of the elastic connecting unit abut upon each other to produce elasticity outward,

wherein when no external force is imposed, each of the free ends of the two terminals are vertically overlapped with one another and separated by the spacing without touching each other.

2. The temperature fuse protection device as claimed in claim 1, wherein the free end of a second terminal of the two terminals is formed with an attachment piece, the second connecting bar of the elastic connecting unit is strip-shaped, and the second connecting bar of the elastic connecting unit is pressed against the first connecting bar for achieving a tight fit, and the attachment piece of the second terminal is wrapped around and secured to the end of the second connecting bar.

3. The temperature fuse protection device as claimed in claim 1, wherein the through hole of the first terminal of the two terminals has a closed structure.

4. The temperature fuse protection device as claimed in claim 1, wherein the through hole of the first terminal of the two terminals has an open structure.

5. The temperature fuse protection device as claimed in claim 1, wherein the hot melt metal composition is changed according to the required hot melt metal breaking temperature.

6. The temperature fuse protection device as claimed in claim 1, /wherein the elastic connecting unit is made of electrically-conducting material.