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US 6,684,477 B2Granted
Prestressed concrete fence post assembly and method of construction
AssigneeGlenn C. Crissey
InventorMerrill E. Crissey
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AssigneeGlenn C. Crissey
InventorMerrill E. Crissey
Estimating the term…
A prestressed concrete fence post assembly, including 1) a main fence post body constructed of a high-strength, concrete grout material; 2) a prestressed high-strength steel tendon member positioned centrally and extended longitudinally of the main fence post body; and 3) a plurality of spaced, parallel concentric connector grooves used with wire tie members to secure fence wire strands against outer surfaces of the main fence post body. Forms, equipment, and method steps for economically casting prestressed concrete post assemblies, poles, towers, or the like. A fence post mold assembly consists of two mating fence post mold half sections, each having an inner plastic material liner to form the desired concrete product. Prestressing is accomplished by pretensioning a centrally located high-strength steel tendon member held at each end by anchor jaw assemblies. A hydraulic tensioning apparatus is connected to one of the anchor jaw assemblies and tension is applied to the tendon member. The prestressing force is retained by extending an anchor nut member into engagement with a top end plate member. A high-strength concrete grout material is forced into the fence post mold assembly near a lower base. A factory arrangement involves a plurality of fence post mold assemblies or a carousel molding assembly may be employed to simplify the logistics of manufacture, increasing the production rate, and reducing the number of personnel and factory space required.
A method of construction of a fence post mold assembly to produce a prestressed concrete fence post assembly utilizing a pair of fence post mold half sections, connector means, a top end plate member, a bottom end plate member, and a fence post mandrel assembly, comprising the steps of:
A method of construction of a prestressed concrete fence post assembly from a fence post mold assembly including a pair of fence post mold half sections, a pair of final end plate members, an anchor jaw assembly, and a prestressing apparatus, comprising the steps of:
A method of construction conjointly of a plurality of prestressed concrete fence post assemblies using fence post mold assemblies including a pair of fence post mold half sections each having internal plastic liners, final end plate members connectable to respective outer ends of the fence post mold half sections, tendon members, an anchor jaw assembly, and a tensioning apparatus, involving the steps of:
A method of construction conjointly of a plurality of a prestressed concrete fence post assembly utilizing a carousel type molding assembly having a plurality of first fence post mold half sections connected to each other to form a circular shape, a plurality of second fence post mold half sections operable to be connected to respective ones of the first fence post mold half sections, a circular tensioning plate sealing engageable with top end portions of said first and second fence post mold half sections, plate adjustment bolt members, and a hydraulic cylinder assembly to move said circular tensioning plate, comprising the steps of:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures: prestressed structures
Columns; Pillars; Struts: of concrete other stone-like material, with or without permanent form elements, with or without internal or external…
With prestressing of part: prestressing rod, filament or strand
Buildings or like structures for particular purposes
Term ended 28 Aug 2021 (estimated)
A patent search was conducted on this invention and the following United States and foreign patents are noted:
U.S. Pat. NO. INVENTION INVENTOR Des. No. 30,959 FENCE POST J. W. Brooks 1,372,362 REINFORCED CONCRETE Emile Marzoli POLE 1,676,679 CONCRETE FENCE POST Wilson Bensinger 3,958,381 CONCRETE FILLED TAPERED Roy E. Meyer TUBULAR TOWER 4,008,026 CONCRETE FORMING William J. APPARATUS FOR MAKING Engstrom FENCE POSTS AND THE LIKE 4,142,711 FENCE AND FENCE POST Rulon W. WITH REMOVABLE RAIL Brimhall RETAINING BRACKET 4,631,883 TENDONS FOR POST- Harris et al TENSIONED PRE-STRESSED CONCRETE STRUCTURES 5,630,301 ANCHORAGE ASSEMBLY Lyle D. Sieg AND METHOD FOR POST-TENSIONING IN PRE-STRESSED CONCRETE STRUCTURES 5,975,500 CAST CONCRETE FENCE Orton et al POSTS AND CAST CONCRETE BASES FOR SAID POSTS
Additionally, the following foreign patents were found:
FIG. 1 is a side elevational view of a prestressed concrete fence post assembly produced by a method of construction described herein;
FIG. 2 is an enlarged sectional view taken along line 2—2 in FIG. 1;
FIG. 3 is an enlarged end view taken along line 3—3 in FIG. 1;
The following is a discussion and description of preferred specific embodiments of the prestressed concrete fence post assembly and method of construction of this invention, such being made with reference to the drawings, whereupon the same reference numerals are used to indicate the same or similar parts and/or structure. It is to be understood that such discussion and description is not to unduly limit the scope of the invention.
On referring to the drawings in detail, and in particular to FIG. 1, a prestressed concrete fence post assembly 16 is created by following the method of construction steps set forth in this application.
The prestressed concrete fence post assembly 16 includes 1) a main fence post body 26; 2) a prestressed tendon cable or wire strand member 28 which was previously tensioned before injecting a concrete grout material thereabout; and 3) a plurality of parallel, spaced outer connector grooves 30 operable to receive strands of fence wire being anchored thereto by known fence wire connector tie members.