Abstract: A pressure and vacuum relief valve mechanism which can be installed in a vent opening in the top wall of a fluid storage tank. The valve mechanism includes a valve housing with a central bore therethrough. One end of the bore communicates with the vent opening to ambient atmosphere and the opposing end communicates with the interior of the tank above the stored fluid. A valve seat within the bore. A single, integral valve member is movable in the bore of the housing. The valve member has a valve component or head formed thereon cooperably engageable with the valve seat within the bore for relieving excessive vacuum in the tank interior. The integral valve member also includes a valve seat and a cooperating valve head for relieving excessive vacuum in said tank interior. These valving arrangements normally being biased closed.

Abstract: A gravity actuated protective cover assembly to be secured upon the upstanding exhaust stack of an internal combustion engine overlying the open end of the stack. The cover assembly includes a clamp member for securement of the assembly to the stack and a pair of support straps connected to the clamp member on which a pivotal cover member and support arm are mounted. A bumper member is mounted on the support straps to absorb the energy of impact at the fully open and closed positions of the cover member on the stack.

Abstract: A saddle or U-bolt clamp is formed from a unitary sheet metal stamping folded to provide hexagonal sleeve formations which receive the legs of the bolt in axially slidable relation. Torque transmitted to the ends of the sleeve formations as the securing nuts are drawn up on the legs of the bolt against the saddle will construct the saddle and U-bolt's bight around the telescoped tubing parts of the exhaust system of vehicles for which such a clamp commonly is used. The heavy duty use for which such clamp is required is permitted even in those critical applications where the transverse profile of the clamp must be substantially reduced or restricted without loss of efficacy and strength of the clamp.

Abstract: A pivotal connection between a gravity-actuated protective cover and a bracket structure for supporting the cover device on an exhaust conduit includes a center spacer that has a chrome hardened peripheral surface and is held between a pair of ears of the bracket by a conventional screw. A bearing sleeve or bushing encircles the spacer and is secured to the protective cover and has at least an internal surface permanently impregnated with a lubricant.

Abstract: An engine exhaust rain cap of the type which is adapted to be clamped to an upstanding exhaust pipe and including a cover secured to a corner of a balance arm body which is pivotally mounted on the ears of the clamp. The balance arm body is a folded sheet metal member whose halves have annular integral outwardly directed extrusions that are brazed to a bearing bushing which in turn is journalled on a bearing member that extends between the halves. The result is a more durable device, especially in the case of heavy duty rain caps.

Abstract: A joint which is made up of exhaust pipes formed with beaded ends or with a beaded end on one pipe and a flared end on the other pipe, in any case either with or without suitable gasket means. A clamp having a concave groove engages the protrusions on the ends of the pipes of the joint and wedgingly forces them together as the clamp is constricted.The clamp is made out of two halves which are hingedly connected at the first end of each and which are adapted to be secured by a bolt at the second end of each, there preferably being a nut permanently welded to one of the second ends coaxial with a first perforation in that end and a second perforation in the other of the second ends to pass the bolt to the nut. The hinged connection is preferably non-separable.

Abstract: The joint of the invention comprises exhaust pipes formed with beaded ends providing abutting flange-like surfaces that are axially forced together by a clamp applying wedging forces on the external beads. Modified forms of the joint have pilot extensions on one pipe of the joined pair, the bead on this one pipe in each case being spaced from the free end of the pipe. The pilot extension is telescoped within the other pipe bringing the beads together side by side and the clamp is engaged over both beads. In some joints, such as those formed in pipes made of a tough metal, a gasket may be inserted between the beaded ends.The clamp for the joints is one which has a concave groove engaging over the pair of beads to apply the axial force by the wedging action produced when the clamp is constricted. The preferred clamp is made in two halves which have a hinged connection of great simplicity comprising merely a rectangular bight formed on one end of one half and a tongue formed on one end of the second half.