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US 2003/0147698 A1Published application
Box lattice support girder
OwnerJames E. Marianskiinventor
Life of this patent
Estimating the term…
Abstract
A support element for use with shotcreting to line tunnel walls with cement includes four rods secured to outer surface portions of quadrilateral reinforcement members. The longitudinal axis of pairs of adjacent rods each lie in a plane such that adjacent planes are normal to one another. Optionally, side braces may be secured to an outer surface or to an inner surface of adjacent rods.
Claims20
A support element, comprising:
- a first rod;
- a second rod spaced apart from the first rod and positioned parallel to the first rod;
- a third rod spaced apart from the first rod and the second rod and positioned parallel to the first rod and the second rod;
- a fourth rod spaced apart from the first rod, the second rod, and the third rod, and positioned parallel to the first rod, the second rod, and the third rod,
- wherein
- the first rod and the second rod each lie in a first imaginary plane,
- the second rod and the third rod each lie in a second imaginary plane,
- the third rod and the fourth rod lie in a third imaginary plane,
- the first rod and the fourth rod lie in a fourth imaginary plane, and
- the first rod, the second rod, the third rod, and the fourth rod define a quadrilateral cross-sectional shape;
- and
- a first reinforcement member connected to the first rod, the second rod, the third rod, and the fourth rod, the first reinforcement member having a first segment, a second segment connected substantially perpendicular to one end of the first segment, a third segment connected substantially perpendicular to one end of the second segment, and a fourth segment joining the first segment to the third segment,
- wherein
- the first reinforcement member is positioned inside and attached to the first rod, the second rod, the third rod, and the fourth rod, substantially perpendicular to the first imaginary plane and the third imaginary plane, and preferably at an angle with respect to the second imaginary plane and the fourth imaginary plane.
11 more elements
An article, comprising:
- four longitudinal members defined as a first rod, a second rod, a third rod, and a fourth rod, wherein each of the rods having a longitudinal axis, and the longitudinal axes of the first and second rods lie in a first plane, the longitudinal axes of the second and third rods lie in a second plane, the longitudinal axes of the third and fourth rods lie in a third plane, and the longitudinal axes of the fourth and first rods lie in a fourth plane with the first and third planes parallel to one another and the second and fourth planes spaced from one another and intersect the first and third planes;
- and
- a reinforcement member having marginal edge portions lying in a plane defined as a fifth plane, the reinforcement member secured to each of the rods with the fifth plane intersecting both the first and third planes at a predetermined angle defined as a first predetermined angle.
Dependencies are inferred from the claim text.