Abstract: A twist-lock connector for adjustably connecting interlocking telescopic tubular members includes a camming surface on the interior surface of a rotatable member which cooperates with the camming member of a seating member attached to a first tubular member. The twist-lock connector is employed by inserting the male end of a second tubular member inside the female end of a first tubular member to which the seating member is attached, and rotating the rotatable member in a first direction until the camming action causes the engaging surface of the seating member to lock by frictionally engaging the outer surface of the second tubular member. Disconnection of the tubular members is effected by reversing the order of the steps for connection. The twist-lock connector also includes an overtightening protection feature. When the rotatable member is rotated in the first direction relative to the seating member by approximately 180°, the lock is released, but without breakage of the twist-lock connector.

Abstract: A hose for low pressure and vacuum applications is provided by a helically wound strip of resilient material. The leading and trailing posts of the helically wound strip interlock with one another and are provided with projections which define a space for confining a bead of bonding material. The profile of the hose configuration prevents the bonding material from encroaching areas of flexation in the hose. The helically wound hose has a close pitch and exhibits good hoop strength, flexibility and bonding characteristics.