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Wall anchor
| Details |
Inventors: Remmers, Lee;
Assignee: Emerson Electric Company (Ocala, FL)
Primary Examiner: Wilson; Neill
Assistant Examiner:
Attorney, Agent or Firm:
The present invention is a wall anchor having a novel finger configuration. This wall anchor has a head and barrel portion with a bore extending therethrough and laterally expandable fingers in general alignment with the bore. Instead of a straight channel, a channel having curved portions separates the fingers. The curved portions of the channel define ramp surfaces that at least partially extend into the path of a securing member created by the bore. Thus, when a securing member, such as a bolt, pin, screw, nail or similar object is inserted into the bore to secure the wall anchor to the wall, the securing member contacts the two ramp surfaces, separating the fingers. As the fingers separate, a portion of the fingers near the ramp surfaces deform such that the ramp surfaces rest on an outer portion of the securing member, thus providing a securing force for connecting the wall anchor to the wall and relieving stress on the area at which the fingers are connected to the barrel. |
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DETAILED DESCRIPTION A wall anchor has a body portion having a hollow barrel and laterally expandable fingers in general alignment with the hollow barrel.
Instead of using a straight channel separating two symmetrical fingers, as is commonly used in prior art wall anchors, an asymmetrical channel is used to provide at least two ramp surfaces, one on each of a plurality of asymmetrical fingers, i.
e.
none of the fingers are the same shape.
The ramp surfaces face the path created by the hollow portion of the barrel.
Thus, when a securing member, such as a bolt, pin, screw, nail or other similar object, is inserted into the hollow barrel to secure the wall anchor to the wall, the securing member contacts the two ramp surfaces.
As the securing member is pushed through the hollow barrel and into the curved channel, it separates the fingers.
As the fingers separate, the ramp surfaces deform under the pressure exerted by the securing member, and then rest on an outer portion of the securing member.
This design thus allows for a redistribution of the stress from a hinge portion of the anchor to the ramp surfaces of the fingers when the fingers are separated.
This allows the wall anchor to be manufactured from harder, more rigid materials, thereby improving the strength of the wall anchor and reducing its susceptibility to breaking.
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Vibration and Earthquake Isolation 
