# US 8,770,932 B2 · Fan assembly including rigid bars with mounting pads

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

- Number: US 8,770,932 B2
- Document ID: US8770932B2
- Status: Granted
- Kind: B2
- Application number: 12/967,064
- Filed: 2010-12-14
- Published: 2012-05-24
- Granted: 2014-07-08
- Earliest claimed: 2010-11-18
- Assignees: Hon Hai Precision Industry Co., Ltd.
- Applicants: Chia-Chen Lee
- Inventors: Chia-Chen Lee
- Web page: https://patentgrep.com/patent/US8770932B2

## CPC

- F04D 19/007: {multistage fans}
- F04D 29/646: {Mounting or removal of fans}
- F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02)

## Abstract

A fan assembly includes two fans, and a number of rigid bars. The fans are connected in series. Each of the fans includes an impeller. The impellers of the fans rotate in opposite directions. The rigid bars extend through the fans and are fixed to the fans, to counteract opposing torque forces produced by the fans.

## Claims

### Claim 1

A fan assembly comprising:
two fans connected in series, each of the fans comprising an impeller, the impellers of the fans operable to rotate in opposite directions; and
a plurality of rigid bars extending through the fans and fixed to the fans, wherein each of the fans comprises two opposing quadrate plates, four through holes are respectively defined in four corners of each of the plates, the plurality of rigid bars comprises four rigid bars, said four rigid bars respectively extend through the through holes of the fans and are fixed to the four corners of the fans, and each of the fans further comprises a cylinder-shaped main body arranged between the corresponding plates, for receiving the corresponding impeller; and, wherein a resilient pad is installed to a section of each of the rigid bars between the corresponding plates of each of the fans.

### Claim 2 (depends on 1)

The fan assembly of claim 1, wherein each resilient pad is substantially cube-shaped, a recess having a C-shaped cross-section is defined in an edge of each resilient pad, to engage with a corresponding rigid bar.

### Claim 3 (depends on 2)

The fan assembly of claim 2, wherein each resilient pad is made of rubber material.

### Claim 4 (depends on 2)

The fan assembly of claim 2, wherein a plurality of protrusions is formed on a side of each resilient pad opposite to the corresponding recess.

### Claim 5 (depends on 2)

The fan assembly of claim 2, wherein a plurality of slots is defined in two portions of each resilient pad bounding opposite sides of the corresponding recess.

### Claim 6 (depends on 1)

The fan assembly of claim 1, wherein the fans are connected to each other by hooks and hook slots.

### Claim 7 (depends on 1)

The fan assembly of claim 1, wherein air is blown in the same direction by the fans.