Pipe-coupling device

Claim 1

In a pipe coupler comprising; a first coupling pipe member provided on the outer periphery thereof with at least two spacedapart engagement ridges formed thereon with helical inclination corresponding to a screw; a second coupling pipe member having a shank part and an outer flange provided with a stopped annular recess; a packing positioned in said recess for receiving and establishing a fluidtight seal with the other end of said first coupling pipe member; a lock collar of barrel shape having at one end thereof with an inwardly directed rim slidably engageable with the outer flange of said second coupling pipe member, and having at the other end thereof engagement flanges for bayonettype engagement with said engagement ridges to thereby to press the other end of the first coupling pipe member against said packing; and a lever handle pivotably connected at one end to the lock collar and being pivotable between an operative position perpendicular to the collar axis for turning the lock collar and an inoperative retracted position parallel with the collar axis; the improvement wherein said lever handle is formed with an integral lug-shaped arm angularly extending from the pivoted end thereof; and said arm, when the level handle is in said inoperative position, engaging said first coupling pipe member to thereby prevent rotation of said lock collar relative to the first coupling pipe member.