Patent ID: 8522823

Claim:
A one-way check valve for use in a railway car control valve, said one-way check valve comprising: a. a body having i. a first end, ii, a second end, iii. a bore extending from said first end to said second end, and b. an insert formed of a first material, said insert having i. a first end, ii. a second end, iii. a middle portion therebetween, and iv. an axis extending from said first end to said second end; and c. a sleeve formed of a second material, said second material being different than said first material and said sleeve being operatively received on said insert intermediate said first end and said second end; wherein said insert is positioned in said body bore, when one of said insert and sleeve is in a first position, air flows in said body second end and out said body first end, and when said one of said insert and said sleeve is in a second position, air is prevented from flowing through said body in either direction.