Fan grill

• US 6,695,577 B1
• Filed: 08/13/2002
• Issued: 02/24/2004
• Est. Priority Date: 08/13/2002
• Status: Active Grant

• Current Assignee: American Power Conversion Corporation (Schneider Electric SE)
• Original Assignee: American Power Conversion Corporation (Schneider Electric SE)
• Inventors: Susek, David N.
• Primary Examiner(s): Nguyen, Ninh H.
• Application Number:
  US10/219,196
• Publication Number:
  US 20040033131A1
• Time in Patent Office: 560 Days
• Field of Search: 415/121.2, 415/200, 415/191, 416/247.R, 417/423.9
• US Class Current: 415/121.2
• CPC Class Codes: F04D 29/703 specially for fans, e.g. fan guards

Abstract

A fan grill for use with a fan associated with an inlet ring is configured to flush mount in an inlet ring and to serve as a safety guard to help prevent finger insertion into, and to help inhibit debris from entering a fan. The fan grill can impede and disturb gas flow to a fan less than by using a non-flush mounted grill or guard. The fan grill includes radial ribs, concentric circular ribs and radial support ribs to form a grate, and tabs. The tabs and the radial support ribs are configured to bias the fan grill against a wall of an inlet ring to securely connect the fan grill in the inlet ring. The fan grill can be readily installed and securely connected to inlet rings or housings of existing fans.

Claims

1. A fan guard for use with a fan associated with an inlet including a wall defining a port, the fan guard comprising:

a grate configured to inhibit insertion of a finger through the grate while permitting passage of air through the grate;

a first bias member connected to the grate and configured to be biased against a first side of the wall of the inlet while the fan guard is mounted to the inlet; and

a second bias member connected to the grate and configured to be biased against a second side of the wall of the inlet while the fan guard is mounted to the inlet.

2. The fan guard of claim 1, wherein the first bias member is flexible to bias the first and second bias members against respective sides of the inlet while the fan guard is mounted to the inlet.

3. The fan guard of claim 1, wherein the first side is a bottom lower edge of the wall of the inlet and the first bias member includes a tab configured to connect to the bottom lower edge of the wall of the inlet.

4. The fan guard of claim 3, wherein the tab includes a stepped portion configured to connect to the bottom lower edge.

5. The fan guard of claim 1, wherein the first bias member includes a circumferential ridge configured to connect to the first side of the wall of the inlet, wherein the first side is a bottom lower edge of the wall of the inlet and the circumferential ridge includes a stepped portion configured to connect to the bottom lower edge.

6. The fan guard of claim 1, wherein the second bias member is an elongated member extending from the grate and has a terminal end configured to mate with the second side of the wall of the inlet.

7. The fan guard of claim 6, wherein the terminal end is concave.

8. The fan guard of claim 1, wherein the second bias member includes an outermost rib defining a perimeter of the grate having a concave outer surface.

9. The fan guard of claim 1, wherein the grate and the first and second bias members are configured such that the fan guard is inserted in the inlet and the first and second bias members are biased against respective sides of the inlet to mount the fan guard to the inlet.

10. The fan guard of claim 1, wherein the fan guard is configured such that a top of the fan guard is substantially even with a top of the wall of the inlet when the fan guard is mounted to the inlet.

11. The fan guard of claim 1, wherein the first side is a bottom lower edge of the inlet, the fan guard further includes at least another first bias member, wherein the first bias members include a multiple of tabs, each tab includes a stepped portion configured to connect to the bottom lower edge of the wall of the inlet, the fan guard further includes at least another second bias member, and wherein the second bias members include a multiple of support ribs having terminal ends configured to mate with the second side of the wall of the inlet, each terminal end being concave.

12. The fan guard of claim 1, wherein the fan guard is constructed of at least one of a plastic, a metal, a ceramic and a composite.

13. A fan guard for use with a fan associated with an inlet in a housing, the inlet having a bottom side defining a port and an inner side for guiding gas to the port, the housing having a surface in which the inlet is disposed, the fan guard comprising:

a grate configured to inhibit insertion of a finger through the grate while permitting passage of air through the grate;

means for biasing the fan guard upward against the bottom side of the inlet while the fan guard is mounted to the inlet; and

means for biasing the fan guard downward against the inner side of the inlet while the fan guard is mounted to the inlet.

14. The fan guard of claim 13, wherein the means for biasing the fan guard upward against the wall includes a multiple of tabs connected to the grate and configured to connect to the bottom side of the inlet.

15. The fan guard of claim 14, wherein each tab includes a stepped portion configured to connect to the bottom side.

16. The fan guard of claim 15, wherein the means for biasing the fan guard downward against the inner side includes a multiple of support ribs having terminal ends configured to mate with the inner side of the inlet.

17. The fan guard of claim 16, wherein each terminal end is concave.

18. The fan guard of claim 17, wherein the fan guard is configured to be flush-mounted such that a top of the fan guard is substantially even with the surface of the housing, in which the inlet is disposed, while the fan guard is mounted in the inlet.

19. A method for mounting a fan guard to a housing, the fan guard including a grate configured to inhibit passage of a finger through the grate while allowing passage of gas through the grate, the housing including an inlet having a bottom surface defining a port and an inner surface configured to direct gas to the port, the fan guard further including multiple tabs coupled to the grate and multiple ribs extending from the grate and having terminal ends adapted to mate with the inner surface, the method comprising:

inserting the fan guard into the inlet;

aligning the fan guard with the port;

bending the tabs connected to the grate relative to the grate and inserting the tabs through the port to connect the tabs with the bottom surface; and

allowing the tabs to bias the tabs and the terminal ends of the ribs against the bottom and inner surfaces, respectively, with the terminal ends of the ribs with the wall.

20. The method of claim 19, wherein bending and inserting the tabs includes applying force to at least one of a top of the fan grill and the tabs.