A compressor (20) has a case (22) and a crankshaft (38). The case has a number of cylinders (30 32). For each of the cylinders, the compressor includes a piston (34) mounted for reciprocal movement at least partially within the cylinder. A connecting rod (36) couples each piston to the crankshaft. A pin (44) couples each connecting rod to the associated piston. Each pin has first (52) and second (53) end portions mounted to first (56) and second (57) receiving portions of the associated piston and a central portion (48) engaging the associated connecting rod. For each of the pistons a pair of first and second at least partially non metallic plugs have respective stems received in the pin first and second end portions and respective heads facing a wall surface of the associated cylinder.

The subject invention provides a fluid flow apparatus for transporting a fluid to inflate and deflate a device including a pumping device and a housing defining a chamber, an inlet port, a fill port, and an exhaust port. A seal member is movable between a seated position closing the exhaust port and an unseated position. A motor has a shaft rotating in each of a first and second rotational direction. A clutch is disengaged from the shaft as the shaft rotates in the first rotational direction and is engaged with and rotates with the shaft as the shaft rotates in the second rotational direction. A centrifugal member is mounted and rotates with the clutch when the shaft rotates in the second rotational direction and engages the seal member to move the seal member to the unseated position for permitting the fluid within the chamber to escape through the exhaust port.

The subject invention provides a fluid flow apparatus for transporting a fluid to inflate and deflate a device including a pumping device and a housing defining a chamber, an inlet port, a fill port, and an exhaust port. A seal member is movable between a seated position closing the exhaust port and an unseated position. A motor has a shaft rotating in each of a first and second rotational direction. A clutch is disengaged from the shaft as the shaft rotates in the first rotational direction and is engaged with and rotates with the shaft as the shaft rotates in the second rotational direction. A centrifugal member is mounted and rotates with the clutch when the shaft rotates in the second rotational direction and engages the seal member to move the seal member to the unseated position for permitting the fluid within the chamber to escape through the exhaust port.

Reciprocating-type compressor for refrigeration and/or conditioning and/or heat pump systems, comprisinga casing in which there is defined at least one compression section comprising at least one cylinder and a corresponding compression piston, a head provided on said casing, defining a delivery chamber immediately down-stream of said compression section, and adapted to receive the compressed fluid from said compression section, an intake zone from where the fluid to be compressed in the at least one cylinder of said compression section is introduced, a delivery tap at the operational outlet of said compression chamber, characterized in that it comprises a check valve placed between said operational outlet of said compression chamber and said delivery tap, adapted to prevent the return of fluid into the compression chamber from said delivery tap.

An oil-free compressor for a rail vehicle includes a compressor housing, a first low pressure piston cylinder supported in the compressor housing, a second low pressure piston cylinder supported in the compressor housing, a first high pressure piston cylinder supported in the compressor housing, a second high pressure piston cylinder supported in the compressor housing, and a crankshaft assembly supported by the compressor housing and linked to pistons of the piston cylinders by respective connecting rods. The first and second low pressure piston cylinders and the first and second high pressure piston cylinders are positioned in an X-shaped configuration around an outer circumference of the compressor housing. The first and second high pressure piston cylinders are configured as first and second lower legs of the X-shaped configuration, and the first and second low pressure piston cylinders are configured as first and second upper legs of the X-shaped configuration.

A reciprocating piston compressor (100) includes a crank casing (10). The reciprocating piston compressor (100) includes a crankshaft (11), a piston rod (12) and a crosshead (13). The crosshead (13) and the piston (23) are actively connected to one another by way of a connecting rod (24). The connecting rod (24) is fixedly restrained on the crosshead (13) and on the piston (23).

A reciprocating piston compressor (100) includes a crank casing (10). The reciprocating piston compressor (100) includes a crankshaft (11), a piston rod (12) and a crosshead (13). The crosshead (13) and the piston (23) are actively connected to one another by way of a connecting rod (24). The connecting rod (24) is fixedly restrained on the crosshead (13) and on the piston (23).

A fluid compressor includes a housing; a compression chamber within the housing; a motor; a shaft that is rotated by the motor; and a piston assembly including at least two pistons directly connected to each other without any connecting rods. The piston assembly performs a reciprocating motion when acted on by the shaft such that the at least two pistons move within the compression chamber to compress a fluid.

A connecting rod for an air compressor includes a rod member, a wrist pin receiving end connected to a first end of the rod member, and a crank pin receiving end connected to a second opposing end of the rod member. A separation line for the connecting rod is provided above the crank pin receiving end. The separation line may be provided between the crank pin receiving end and the rod member. The connecting rod may include a first portion including the rod member and the wrist pin receiving end, and a separate second portion including the crank pin receiving end. The separation line may be provided between the first portion and the second portion.

A vehicle air-conditioner compressor may include a housing having a front housing section and a rear housing section; a shaft rotatably installed in the housing; a lug fixed at a preset position on the shaft; a swash plate coupled with the lug at one side thereof and rotating together with the lug, a piston connected to the swash plate by a shoe and moved reciprocatingly by the swash plate; a cylinder that accommodates the piston therein, and a pressure-sensing chamber coupled with a rod at the other side of the swash plate, that operates the rod using a pressure provided from a high-pressure chamber of the rear housing.