Pipe plug

Claim 1

A PLUG MEMBER ADAPTED TO RENDER FLUID TIGHT THE END OF A PIPE OR THE LIKE COMPRISING: (A) A BOLT HAVING HEAD AND NUT MEMBERS AND A SHANK PORTION; (B) DISK-LIKE ELASTIC MEANS MOUNTED ON THE SHANK PORTION OF SAID BOLT BETWEEN SAID HEAD AND NUT MEMBERS; (C) A PLUNGER-LIKE MEMBER, DEFINING FIRST CAMMING MEANS OF FRUSTO-CONICAL CONFIGURATION, SLIDEABLY MOUNTED ON THE SHANK PORTION OF SAID BOLT BETWEEN SAID ELASTIC MEANS AND NUT MEMBERS; (D) SAID BARREL MEMBER, DEFINING SECOND CAMMING MEANS OF FRUSTO-CONICAL CONFIGURATION AND BEING ADJUSTABLY SECURED TO SAID PLUNGER-LIKE MEMBER SO THAT SAID BARREL MEMBER IS MOVABLE RELATIVE TO SAID PLUNGER-LIKE MEMBER AND HAVING A SURROUNDING RELATION WITH RESPECT TO THE SHANK PORTION OF SAID BOLT AND THE END OF SAID PIPE AND WITH SAID FIRST AND SECOND CAMMING MEANS BEING SPACED APART AND HAVING AN OPPOSED RELATION; (E) A SLEEVE MEMBER SURROUNDING THE END OF THE SAID PIPE AND HAVING END PORTIONS OF FRUSTO-CONICAL CONFIGURATION RECEIVED BETWEEN SAID FIRST AND SECOND CAMMING MEANS, SAID END PORTIONS BEING ADAPTED TO COACT WITH SAID FIRST AND SECOND CAMMING MEANS FOR ENGAGING THE END OF SAID PIPE; (F) AND A PLURALITY OF PIN MEMBERS EXTENDING BETWEEN SAID NUT AND PLUNGER-LIKE MEMBERS WHICH, WHEN SAID NUT MEMBER IS ROTATED IN A FIRST DIRECTION AND SAID PLURALITY OF PINS ABUTS SAID NUT AND PLUNGER-LIKE MEMBERS, WILL ALLOW SAID HEAD PORTION TO BE MOVED TOWARDS SAID PLUNGER-LIKE MEMBER THEREBY AXIALLY COMPRESSING AND RADIALLY EXPANDING SAID ELASTIC MEANS BETWEEN SAID HEAD AND PLUNGER-LIKE MEMBERS AND THEREBY FORM A FLUID TIGHT SEAL WITHIN SAID PIPE, AND WHEN SAID NUT MEMBER IS ROTATED IN A SECOND DIRECTION OPPOSITE SAID FIRST DIRECTION SAID HEAD MEMBER MOVES AWAY FROM SAID PLUNGER AND SAID ELASTIC MEANS IS ALLOWED TO RETURN TO ITS UNSTRESSED POSITION.