 Universal mechanical testing device |
| One aim of the present invention is to provide a precise and controlled material testing device for ... |
|
| Diaphragm with perimeter edging on structural panels |
| It is an object of the present invention to create a diaphragm that is highly resistant to failure ... |
|
| Record receptacle for a burial vault |
| FIG. 1 illustrates a perspective view of a burial vault 100 for use with an embedded and sealed ... |
|
| Method and apparatus for real-time structure parameter modification |
| First, with reference to FIG. 1, a building structure is indicated generally at 10. The structure ... |
|
| Burial crypt |
| The present invention provides a crypt lid with lifting means for applying a vertical force to lift ... |
|
| Double saddle hanger clamp |
| It is therefore an object of this invention to provide an improved clamping arrangement about the ... |
|
| Adjustable load bolt adapter bracket assembly |
| I claim: 1. An adjustable bracket assembly for selective use with a varying number of fasteners to ... |
|
| Pipe hanger assembly |
| I claim: 1. A pipe hanger assembly for hanging a pipe from a pipe-hanger support comprising: a ... |
|
| Seismic brace for electric cable tray |
| It is the primary object of the present invention to provide a seismic restraint or brace for ... |
|
| Threaded mounting for extruded pole |
| The embodiments of the invention in which an exclusive property or privilege is claimed are defined ... |
|
|
Concrete anchor
| Details |
Inventors: Francies, III, Sidney E.; Lancelot, III, Harry B.;
Assignee: Dayton Superior Corporation (Dayton, OH)
Primary Examiner: Friedman; Carl D.
Assistant Examiner: Verner; Steve
Attorney, Agent or Firm: Wood, Herron & Evans, LLP, Flynn; Thomas W.
One preferred embodiment of an improved concrete anchor designed in accordance with the present invention for embedment in a concrete panel or the like includes an elongated bar having substantially flat parallel faces, an inner end disposed within the panel, an outer end disposed within a recess in the surface of the concrete panel and side edges extending between the faces. The side edges extend in continuously diverging relationship from adjacent the outer end to adjacent the inner end. In accordance with another embodiment, the preferred concrete anchor includes an elongated bar having substantially flat parallel faces; an inner end disposed within the panel; an outer end disposed within a recess in the surface of the concrete panel; and side edges, preferably substantially straight, which extend in a substantially parallel relationship between the faces. The outer end includes spaced, outwardly-projecting extensions disposed adjacent the side edges of the bar and, preferably, an elongated opening. The inner end is complementary in shape to the outer end, except that a major portion of the inner end is occupied by a void, preferably of triangular shape. The preferred concrete anchor is susceptible of relatively simple and economic manufacture as a unitary stamping. |
|
DETAILED DESCRIPTION These needs and others are addressed by an improved concrete anchor designed in accordance with the present invention for embedment in a concrete panel or the like, and by the structure formed by the combination of the concrete anchor with such a concrete panel.
In accordance with a first embodiment, the preferred concrete anchor includes an elongated bar having substantially flat parallel faces, an inner end disposed within the panel, an outer end disposed within a recess in the surface of the concrete panel and side edges extending between the faces.
The side edges extend in continuously diverging relationship from adjacent the outer end to adjacent the inner end.
The extension of the side edges in a continuously diverging relationship serves to firmly secure the concrete anchor in the concrete panel.
More specifically, the configuration of the side edges of the preferred concrete anchor serves to direct the reaction forces generated by the application of a pulling force to the outer end of the elongated bar against the surrounding concrete of the concrete panel in a compressive mode.
It is well known that concrete is strongest in compression.
Thus, the extension of the side edges in a continuously diverging relationship serves to direct the reaction forces so as to maximize the ability of the surrounding concrete to sustain those reaction forces.
Preferably, the side edges of the preferred concrete anchor are substantially straight.
Alternatively, the side edges include recesses defining recessed side edge sections in continuous diverging relationship.
The preferred concrete anchor further defines an elongated opening in its outer end and a void occupying a major portion of its inner end.
Most preferably, the void is triangular or trapezoidal in shape so as to conform approximately to the continuously diverging relationship of the side edges.
The void serves to further secure the concrete anchor in the concrete panel.
When the concrete anchor is embedded in the concrete panel, as by casting the concrete panel over the concrete anchor, a "nugget" of concrete forms through the void
|
|
Vibration and Earthquake Isolation 
