A power end assembly includes a crankshaft section, a crosshead section, and a connector section coupled together by one, two, or more sets of stay rods. The power end may include one or more support plates that are coupled to the crankshaft section and/or crosshead section. The crosshead section includes a plurality of individual crosshead frames. The connector section may include a plurality of individual connector plates or may be a unitary connector plate. The power end is configured to be coupled to a fluid end assembly by coupling the fluid end assembly to the connector plates.

A device configured to attach to a motor vehicle transmission housing enclosing the motor vehicle transmission is disclosed. The device includes a cover having an upper surface and a lower surface. The lower surface includes at least a first chamber and a second chamber, such that, once said cover is installed onto the motor vehicle transmission housing, the first chamber is in fluid communication with a motor vehicle crankcase and a motor vehicle oil tank, and the second chamber is in fluid communication with the motor vehicle transmission. The device includes a vent extending through the upper surface and the lower surface so as to vent pressure within said first chamber to the outside of said first chamber.

This invention relates to power takeoff devices (PTOs), which are useful for mounting on transmissions and for performing, directly or indirectly, useful work via the PTO's rotatable output shaft. A system and method designed for quick and convenient installation of a PTO and an attachment element. In some embodiments, the attachment element is an adapter configured to secure a transmission and the PTO is configured to attach to the adapter.

A utility vehicle including an engine; an exhaust pipe through which exhaust gas is discharged from the engine, the exhaust pipe being connected to the engine; and an air guide that guides outside air toward the exhaust pipe.

A vehicle including an engine body that has a crankcase that rotatably supports a crankshaft, a cylinder, and a cylinder head provided with an intake port and an exhaust port, in which a central axis of the crankshaft extends in the vehicle width direction, a CVT disposed on a side portion in the vehicle width direction of the engine body, a transmission disposed on one side in a front-rear direction of the engine body, an intake pipe connected to the intake port, an air cleaner connected to the intake pipe, an exhaust pipe connected to the exhaust port, and an exhaust muffler connected to the exhaust pipe. At least a part of each of the transmission, the intake pipe, the air cleaner, the exhaust pipe, and the exhaust muffler is disposed in a region where the engine body is projected in the front-rear direction.

A power end assembly includes a crankshaft section, a crosshead section, and a connector section coupled together by one, two, or more sets of stay rods. The power end may include one or more support plates that are coupled to the crankshaft section and/or crosshead section. The crosshead section includes a plurality of individual crosshead frames. The connector section may include a plurality of individual connector plates or may be a unitary connector plate. The power end is configured to be coupled to a fluid end assembly by coupling the fluid end assembly to the connector plates.

A vehicle has an engine; a drive pulley connected to and driven by a crankshaft of the engine; a driven pulley; an output shaft connected to and driven by the driven pulley; a belt looped around the pulleys; and a cover connected to the engine. The cover and the engine define a volume therebetween. A baffle disposed in the volume separates the volume in first and second chambers. The first chamber is disposed between the baffle and the engine. The second chamber is disposed between the baffle and the cover. The pulleys are disposed in the second chamber. The baffle defines first and second apertures fluidly communicating the first chamber with the second chamber. An air inlet is fluidly connected to the first chamber. An air outlet is fluidly connected to the second chamber.

The disclosure provides rotary machines that include, in one embodiment, a shaft defining a central axis A, the shaft having a first end and a second end. The shaft can have a first gearbox disposed thereon defining one or more cavities therein. At least one contour is slidably received into an arcuate cavity in an exterior surface of the gearbox. The contour has a convex outer surface that cooperates with an inwardly facing curved surface of a housing to form a working volume. A gearbox mechanism consisting of gears, crankshafts, bearings and connecting rod creates an oscillatory motion 2 times per revolution such that the contour can navigate about the arcuate cavity without contacting the cavity at a high rate of rotating speed. Thus, said working volume can expand and compresses twice per rotatable shaft revolution.

An in-case oil passage extending in an axial direction above a plurality of gears is formed inside an outer peripheral wall portion of the accommodating case. The in-case oil passage includes an in-case oil passage opening portion which opens from the cover wall portion to the one end side in the axial direction. The cover wall portion is provided with an oil guide member at a position where at least a part of the cover wall portion overlaps the in-case oil passage opening portion when viewed from the one end side in the axial direction, the oil guide member guiding oil discharged from the in-case oil passage opening portion to the oil collecting portion of the oil collecting pocket.

A power unit having a crankcase and peripheral devices wherein a driving source for a gear shifting device is disposed so as to be displaced below the crankcase. An engine includes a gear speed change mechanism having a plurality of gear pairs for changing the speed of a rotational force of a crankshaft. A gear shifting device includes at least a plate-shaped shift arm rocking about a shift spindle to perform a gear pair changing operation on the gear speed change mechanism. A crankcase houses the gear speed change mechanism and the gear shifting device with an oil pan attached to a lower portion of the crankcase. A communicating hole communicating with the oil pan is formed in a bottom portion of the crankcase with the bottom portion being located below the shift arm, and a rocking range of the shift arm partly overlaps the communicating hole.