초록 ▼

A fan shroud structure 10 is constructed and arranged to carry a fan. The fan shroud structure includes a body 12 having a periphery, a main surface, and an annular rim 26 defining a generally central opening 28. The opening 28 is sized to accommodate blades of a fan. Fan mounting structure 30 is c

A fan shroud structure 10 is constructed and arranged to carry a fan. The fan shroud structure includes a body 12 having a periphery, a main surface, and an annular rim 26 defining a generally central opening 28. The opening 28 is sized to accommodate blades of a fan. Fan mounting structure 30 is coupled with the body and is disposed generally adjacent to the central opening. The fan mounting structure is constructed and arranged to support a motor of a fan. The body includes a plurality of surfaces features 34 constructed and arranged to affect resonance of the shroud structure with each feature having a surface 36 that is discontinuous with respect to the main surface 38 of the body. Each feature 34 also extends from the annular rim to the periphery of the body.

대표청구항 ▼

What is claimed is: 1. A fan shroud structure constructed and arranged to carry a fan, the fan shroud structure comprising: a body having a periphery, a main portion, and an annular rim defining a generally central opening, the opening being sized to accommodate blades of a fan, fan mounting struct

What is claimed is: 1. A fan shroud structure constructed and arranged to carry a fan, the fan shroud structure comprising: a body having a periphery, a main portion, and an annular rim defining a generally central opening, the opening being sized to accommodate blades of a fan, fan mounting structure coupled with the body and disposed generally adjacent to the central opening, the fan mounting structure being constructed and arranged to support a motor of a fan, wherein the body includes a plurality of surface features constructed and arranged to affect resonance of the shroud structure, each feature extending from the annular rim to the periphery of the body, with the surface features completely surrounding the annular rim, and wherein each feature has a first surface that extends above the main portion at a front end of the body and an opposing second surface that extends below the main portion at a back end of the body, whereby each first and second surface is discontinuous with respect to the main portion of the body. 2. The shroud structure of claim 1, wherein each surface feature defines a step between the surface and the main portion. 3. The shroud structure of claim 1, wherein each surface feature defines a trough with said surface being a curved surface and wherein the main portion is generally planar. 4. The shroud structure of claim 1, wherein a central axis is defined with respect to the rim and each surface feature extends radially with respect to the central axis. 5. The shroud structure of claim 1, wherein the fan mounting structure includes a mounting base and a plurality of arms connecting the mounting base to the rim of the body. 6. The shroud structure of claim 5, further including a support rib coupled, at the rim, between a surface feature and an associated arm. 7. The shroud structure of claim 1, wherein the body has an opposing pair of first sides and an opposing pair of second sides to define a box-like configuration. 8. A fan shroud structure constructed and arranged to carry a fan, the fan shroud structure comprising: a body having a main portion defining a periphery, and an annular rim defining a generally central opening, the opening being sized to accommodate blades of a fan, fan mounting structure coupled with the body and disposed generally adjacent to the central opening, the fan mounting structure being constructed and arranged to support a motor of a fan, wherein the body includes means for affecting resonance of the shroud structure extending from the annular rim to the periphery of the body, with the means for affecting resonance completely surrounding the annular rim, and wherein the means for affecting resonance includes a first surface extending above the main portion at a front end of the body and an opposing second surface extending below the main portion at a back end of the body such that each first and second surface is discontinuous with respect to the main portion of the body. 9. The shroud structure of claim 8, wherein the means for affecting resonance includes a plurality of surface features defining steps in the body such that a surface of each step is on a plane different from a plane on which the main portion resides. 10. The shroud structure of claim 8, wherein the main portion is generally planar and the means for affecting resonance includes a plurality of surface features defining troughs in the body, with each trough defining a generally curved surface disrupting the generally planar main portion. 11. The shroud structure of claim 9, wherein a central axis is defined with respect to the rim and each surfaces feature extends radially with respect to the central axis. 12. The shroud structure of claim 10, wherein a central axis is defined with respect to the rim and each surfaces feature extends radially with respect to the central axis. 13. The shroud structure of claim 8, wherein the fan mounting structure includes a mounting base and a plurality of arms connecting the mounting base to the rim of the body. 14. The shroud structure of claim 13, further including a support rib coupled, at the rim, between a surface feature and an associated arm. 15. The shroud structure of claim 8, wherein the body has an opposing pair of first sides and an opposing pair of second sides to define a box-like configuration.