Patent ID: 6951354

Claim:
An elbow fitting for use in effecting directional changes from an inlet pipe to an outlet pipe in a pneumatic product conveying system, comprising: a circular inlet portion connectable to said inlet pipe to receive a flow of product particles therefrom; an inlet transition portion connected to said inlet portion and expanding from a generally circular cross-section to an expanded non-circular cross-section having an outer side width dimension that is greater than a diameter dimension of said inlet portion, said inlet transition portion expanding in depth into a radially outward side of said elbow fitting, a radially inward side of said elbow fitting maintaining a linear relationship with respect to said inlet portion and said inlet pipe; a curved expanded portion connected to said inlet transition portion and carrying said width dimension through an angular deflection; an outlet transitional portion connected to said curved expanded portion to reduce the cross-sectional area from said expanded non-circular cross-section to said generally circular cross-section, wherein said non-circular cross-sectional area is generally triangular; and an outlet portion having said circular cross-section and being connected to said outlet transitional portion, said outlet portion also being connectable to said outlet pipe to convey said flow of product particles into said outlet pipe.