US 4,338,725 A · Pipe fitter's quick square

Abstract

A pipe fitter's square has a plurality of linear edges oriented at selected angles to provide easy and accurate alignment of pipe sections. A first edge of the square is parallel to its longitudinal axis. Second and third edges of the square are positioned at 45.degree. angles to the first edge to provide for 90.degree. pipe section alignment. Fourth and fifth edges of the square are positioned at 22.5.degree. angles relative to the longitudinal axis of the square to allow alignment for a 45.degree. bend. Levels are mounted to the square parallel and adjacent to the respective first, second and third edges to provide references to the horizontal and vertical and to make possible the division of pipe exteriors into equal angular sections. A protractor scale is imprinted on the square and a pivotal protractor arm is mounted on the square to measure specific angles.

Claims12

Dependent claims

A pipe fitter's square comprising:

a planar member having first, second, third, fourth and fifth linear exterior edges;
said first edge extending parallel to the longitudinal axis of said planar member;
said second edge intersecting a first end of said first edge at a 135.degree. interior angle;
said third edge intersecting a second end of said first edge at a 135.degree. interior angle, said third edge essentially equal in length to said second edge;
said fourth edge intersecting said second edge at an end thereof opposite said first edge, said fourth edge having an interior angle of 67.5.degree. with respect to said second edge;
and
said fifth edge intersecting said third edge at an end thereby opposite said first edge, said fifth edge having an interior angle of 67.5.degree. with respect to said second edge whereby said second and third edges when engaged with two intersecting pipes will position them at 90.degree. and when said fourth and fifth edges are engaged with intersecting pipes will position them at 45.degree..

4 more elements

A pipe fitter's square comprising:

a planar member having first, second, third, fourth fifth, sixth, seventh and eighth linear exterior edges;
said first edge extending parallel to the longitudinal axis of said planar member;
said second edge intersecting a first edge at a 135.degree. interior angle;
said third edge intersecting a second end of said first edge at a 135.degree. interior angle, said third edge being essentially equal in length to said second edge;
said fourth edge intersecting said second edge at an end thereof opposite said first edge, said fourth edge having an interior angle of 67.5.degree. with respect to said second edge, said fifth edge intersecting said third edge at an end thereof opposite said first edge, said fifth edge having an interior angle of 67.5.degree. with respect to said second edge and said fifth edge essentially equal in length to said fourth edge;
a first vial level mounted to said planar member adjacent said first edge with the axis of said first vial level parallel to said first edge;
a second vial level mounted to said planar member with the axis of said second vial level parallel to said second edge,
a third vial level mounted to said planar member adjacent said third edge with the axis of said third vial level parallel to said third edge;
a fourth vial level mounted to said planar member with the axis of said fourth vial level perpendicular to said first edge, a sixth edge parallel to and opposite said first edge, said sixth edge including a notch located at the center line of said planar member,
a seventh edge intersecting said fourth edge at an end thereof opposite said second edge, said seventh edge having an interior angle of 112.5.degree. with respect to said fourth edge;
and
an eighth edge intersecting said fifth edge at an end thereof opposite said third edge, said eighth edge having an interior angle of 112.5.degree. with respect to said fifth edge, said seventh and said eighth edges having essentially equal lengths.

9 more elements

Dependencies are inferred from the claim text.

Pipe fitter's quick square

Life of this patent

Pipe fitter's quick square

Life of this patent

Abstract

Claims12