Implements or apparatus for applying pushing or pulling force – Pipe or rod jack – Tie rod tensioner
Reexamination Certificate
2006-01-17
2010-10-26
Canfield, Robert J (Department: 3633)
Implements or apparatus for applying pushing or pulling force
Pipe or rod jack
Tie rod tensioner
C249S040000, C024S13600R, C052S223130, C254S13430R, C029S253000, C029S270000, C029S278000, C269S003000, C269S006000, C269S229000
Reexamination Certificate
active
07819388
ABSTRACT:
An apparatus for gripping smooth and/or deformed cylindrical or multiple stranded tendons (rods) commonly used in the Art of Construction, the apparatus comprising a housing (barrel), a plurality of jaws (wedges) within the housing, a tightening device to align the jaws (wedges) and to cause engagement of the jaws (wedges) to the tendon (rod), a tensioning device to properly position the apparatus. The tendon (rod) gripping apparatus includes a first aperture and a second aperture that facilitate passage of a tendon (rod) through the apparatus. The jaw (wedge) cluster comprises a plurality of elongated members, that surround the tendon (rod), are generally wedge shaped and complementary to an inner tapered wall of the housing (barrel).
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“Standard Test Method for Tensile Properties of Pultruded Glass-Fiber-Reinforced Platsic Rod,” ASTM Designation: D 3916-84 (Reapproved 1988), pp. 555-558.
Andras Joseph C.
Canfield Robert J
Fonseca Jessie
Myers Andras Sherman LLP
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