Abstract: A linear locking barrel system for a firearm may include a frame, a slide movably mounted on the frame and defining a barrel channel, a barrel at least partially positioned in the barrel channel of the slide and being movable with respect to the frame and slide along a linear path, and a locking member configured to lock movement of the slide with the barrel for at least a portion of rearward recoil movement of the barrel. The locking member has an engaged condition in which the locking member locks the barrel and slide together and a disengaged condition in which the locking member releases the slide from the barrel during rearward recoil movement.

Abstract: The present disclosure is directed to clutches and pistons used therein. A multi-plate clutch includes a shaft configured to provide rotational movement about a central axis of the clutch, a drum, wherein the drum comprises an inner surface with a plurality of splines formed therein and an opening about the central axis configured to receive the shaft, a plurality of ring-shaped discs configured to engage with the splines and a piston, wherein the piston comprises a plurality of protrusions on an outer circumferential surface of the piston configured to engage with the splines and an opening about the central axis configured to receive the shaft.

Abstract: An automatic transmission oil filter retainer includes a base portion; a riser portion extending from a side of the base portion; and a retainer portion extending from a side of the riser opposite the base portion and at right angle to the riser portion, the retainer portion extending parallel to and overlaying the base portion. The base portion is dimensioned with a first short side measuring about 0.56 inches, a second short side measuring about 0.5 inches, and a first long side measuring about 1.39 inches. The through-hole has a diameter of about 0.25 inches. The riser portion is inset along a second long side by about 0.06 inches and extends at 90° from the second short side and the second long side by about 0.59 inches. The retainer portion extends at 90° from the riser portion in a direction towards the first long side by about 0.0305 inches.

Abstract: A structure of a fuel cell is provided. The fuel cell comprises a housing having a plurality of receiving containers mounted therein; and a plurality of reaction units, wherein one reaction unit is mounted in one receiving container respectively and has one electrode and the other electrode, one of the electrodes and one of the other electrodes are mounted protruding from the housing, and the remaining electrodes and the remaining other electrodes are coupled with one another sequentially such that a state of series connection is formed between the electrodes and the other electrodes.