Abstract: A coupler for securing an auger and/or extension piece(s) to a PTO shaft. In one construction, a threaded PTO collar mounts to a PTO shaft and mates with a suitable length stub shaft and captured, knurled hand nut mounted to an auger. The stub shaft indexes in non-rotational engagement to the PTO collar. In another construction, a PTO collar provides several detents that interconnect with resiliently biased projections at an auger collar. A hand piece maintains the connection. In other embodiments, key(s) at the PTO shaft mate in non-rotational engagement with keyway(s) at an auger and a resilient member latches the non-rotational connection. Shaped PTO shaft surfaces and complementary auger coupler surfaces can be included with the later couplers to enhance the connection.

Abstract: A catalytic cracking process is disclosed in which cracking is performed in a riser reactor, catalytically cracked product is substantially separated from the catalyst in a gross-cut separator downstream of the riser reactor, and the cracked product is quenched with an anhydrous quench liquid at a location immediately downstream of the oil outlet of the gross-cut separator.

Abstract: Effective quenching is provided in a catalytic cracking unit to increase product yield and decrease thermal cracking. For increased benefits, the quench is injected at special locations. In the illustrated embodiment, the quench is injected into the oil product immediately downstream of an external gross cut separator before the product enters a disengaging vessel.

Abstract: Effective quenching is provided in a catalytic cracking process to increase product yield and decrease thermal cracking. To this end, the quench is injected at special locations and a special quench is used. In the illustrated embodiment, the quench is injected into the oil product immediately downstream of an external gross cut separator before the product enters a disengaging vessel and the quench comprises cycle oil.

Abstract: The method of converting at least 20% by weight of a vacuum gas oil fraction boiling above 650.degree. F. into products having a boiling point less than about 650.degree. F., which comprises hydrotreating a vacuum gas oil with a hydrodesulfurization catalyst comprising a Group VIB and Group VIII metal wherein an organic fluorine compound is added to the vacuum gas oil during hydrotreating and the vacuum gas oil is hydrotreated under hydrogen at a temperature of at least 740.degree. F.

Abstract: A combined clutch and brake mechanism for use in such applications as power lawnmowers. During actuation of a manual control the brake is released and power is transmitted from the engine to the blade carrier. If the manual control is released, power transmission is disabled and braking is initiated, the braking being maximized by the very motion of the member being braked. The invention is also shown in a form adaptable for use in general power transmission applications.

Abstract: A clutch operable manually to couple and uncouple a driven member from a drive shaft and to stop movement of the driven member upon uncoupling of the same. A driving clutch plate and a reaction member are fixed on the drive shaft and axially spaced apart thereon. A driven clutch plate and a cooperating actuating and output member, mounted on the drive shaft between the driving clutch plate and reaction member, provide an axially expansible and contractible clutch assembly, the actuating and output member having driving engagement with the driven member. Actuator means, carried by the driven clutch plate and the actuating and output member, limits rotary movement between the driven clutch plate actuating and output member, and causes the clutch assembly to vary between expanded and contracted conditions. A stopping device is arranged to prevent rotation of the driven clutch plate.