# US 8,540,414 B2 · Detachable LED bulb

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- Number: US 8,540,414 B2
- Document ID: US8540414B2
- Status: Granted
- Kind: B2
- Application number: 13/244,483
- Filed: 2011-09-25
- Published: 2013-03-28
- Granted: 2013-09-24
- Earliest claimed: 2011-09-25
- Applicants: Chin-Yi Hu
- Inventors: Chin-Yi Hu
- Web page: https://patentgrep.com/patent/US8540414B2

## CPC

- F21V 23/002: {Arrangements of cables or conductors inside a lighting device, e.g. means for guiding along parts of the housing or in a pivoting arm}
- F21K 9/23: Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
- F21V 23/009: {the casing being inside the housing of the lighting device}
- F21Y 2115/10: Light-emitting diodes [LED]
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21K: NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED

## Abstract

A detachable LED bulb which is easy to be maintained is disclosed. The LED bulb includes a circuit board, LED elements, heat dissipating cup, a base and a power driver. The circuit board has two power lines with a second connector. The LED elements are mounted on the circuit. The heat dissipating cup has a hollow portion, a seat for supporting the circuit and a second coupler. The base has a first coupler for coupling with the second coupler. The power driver is received in the hollow portion of the dissipating cup, is electrically connected between the base and the circuit board, and has a first connector for detachably connecting the second connector of the power lines.

## Claims

### Claim 1

A light emitting diode (LED) bulb comprising:
a circuit board having two power lines with a second connector;
an LED element mounted on the circuit board;
a heat dissipating cup, having a hollow portion, a seat for supporting the circuit and a second coupler;
a base having a first coupler for coupling with the second coupler, wherein the base is integrally fastened to the heat dissipating cup by linking the first coupler and the second coupler; and
a power driver, received in the hollow portion of the dissipating cup, electrically connected between the base and the circuit board, and having a first connector for detachably connecting the second connector of the power lines.

### Claim 2 (depends on 1)

The LED bulb of claim 1, wherein the first coupler of the base has a cylinder with a first thread and an opening in the cylinder, and the second coupler of the heat dissipating cup is a threaded hole with a second thread corresponding to the first thread.

### Claim 3 (depends on 2)

The LED bulb of claim 2, wherein the seat is formed with a through hole communicating with the threaded hole.

### Claim 4 (depends on 1)

The LED bulb of claim 1, wherein the first coupler is two hooks towards the heat dissipating cup, the second coupler is a flange formed on an end of the heat dissipating cup, and the base and heat dissipating cup are assembled integrally by engaging the hooks with the flange.