The hermetically encapsulated refrigerant compressor includes a cylinder, a reciprocating piston arranged in the cylinder and having a reciprocating piston axis, a valve plate comprising a suction valve opening and a discharge valve, a cylinder head on the side of the valve plate facing away from the cylinder, a cylinder head cover which has an outlet for compressed refrigerant, and a sound absorber. On the side of the valve plate facing away from the cylinder, a nozzle is arranged as an inlet for refrigerant to be drawn in, the nozzle having a first end arranged at the suction valve opening and a second end. The nozzle is inclined at a maximum angle of inclination of between −45° and +45° in relation to the reciprocating piston axis. The sound absorber has a housing with a suction opening into which the second end of the nozzle leads.

An air compressor includes a compressor assembly having an electric motor and a pump driven by the motor, a battery pack electrically connected to the motor for providing electrical power thereto, a storage tank that receives compressed air from the pump, and a case enclosing at least the compressor assembly and the storage tank. The case attenuates noise emitted by the compressor assembly.

An on-board sensor cleaning device includes nozzle ports. The on-board sensor cleaning device ejects fluid from the nozzle ports in a predetermined order to clean a sensing surface of an on-board sensor.

The pump has a casing accommodating a piston and a driving part. The casing has a first casing member having a driving part retaining portion retaining the driving part, a second casing member fixedly stacked on the first casing member in the reciprocating direction of the piston, and a cylindrical pump chamber peripheral wall member disposed around a head of the piston. The second casing member has an end wall portion extending in a transverse direction substantially perpendicular to the reciprocating direction. A pump chamber, a delivery chamber, and a buffer chamber are defined between the first casing member and the end wall portion of the second casing member. The pump chamber, the delivery chamber, and the buffer chamber are disposed side-by-side in the transverse direction.

A process for manufacturing a device and the device for damping pressure pulsations for a compressor of a gaseous fluid, in particular a refrigerant, in a refrigerant circuit of a motor vehicle air-conditioning system. The device exhibits a housing that encompasses a chamber and features at least two outlet openings. Here, the housing is constructed between tubular connecting lines, whose ends are aligned with one another. An insert element for reducing the cross-sectional area of the pass-through opening is arranged inside at least one of the pass-through openings.

A repair system for a vehicle includes a base and a lift component movably secured to the base for lifting a portion of a frame of the vehicle. An air compressor unit is disposed on the base and has a discharge hose configured to be selectively connected to the tire for delivering compressed. A sealant reservoir is disposed on the base and filled with a flat tire sealant. The discharge hose is optionally configured to deliver the flat tire sealant to the tire. A controller is disposed on the base and receives tire data from the vehicle and controls discharge of the compressed air from the air compressor unit to the tire and optionally controls discharge of the flat tire sealant to the tire based on the tire data. The tire data includes a tire pressure reading associated with the tire.

A device for canceling acoustic noise generated includes, in one example, an inlet channel configured to be fluidly connected to an inlet port of a pump and an outlet channel configured to be fluidly connected to an outlet port of the pump. The device also includes an inlet resonator and an outlet resonator, both having open ends and closed ends. The open ends of the inlet and outlet resonators are fluidly connected to the inlet and outlet channels, respectively. When in operation, the inlet and outlet resonators can cancel noise generated by the operation of the pump.

A compressor comprises a first cylinder for compressing a fluid and a second cylinder for driving a piston in the first cylinder. The first cylinder comprises a chamber configured to receive the fluid. The piston is reciprocally movable in the chamber for compressing the fluid. The chamber comprises four ports at the first end including two inlet ports and two outlet ports with a check valve is connected to each port. Each of the four ports is slanted such that the plurality of check valves and inlet and outlet conduits are spaced apart from the second cylinder. The compressor further comprises an inlet conduit to supply the fluid from a fluid source to the chamber through the inlet ports and an outlet conduit for receiving fluid from the chamber through the outlet ports.

A pressure adjustment apparatus including a pump, a selector valve coupled to the pump, and a chamber in selective fluid communication with the pump through the selector valve is disclosed. The pump includes a pump body that defines a variable volume therein, the pump body further defining a first aperture and a second aperture therethrough. The selector valve includes a first check valve disposed in a first fluid channel of a plurality of fluid channels, the first check valve being oriented to permit flow through the first fluid channel only in a first flow direction, the first flow direction being a flow direction out of the variable volume, and a second check valve disposed in a second fluid channel of the plurality of fluid channels, the second check valve being oriented to permit flow through the second fluid channel only in a second flow direction.

A connecting device includes a substantially cylindrical or tubular body provided, at one of its ends, with an outer perimeter projection and co-operative with a duct of channel of a cylinder cap. The device is preferably producible with steel aluminum alloy, or another metal alloy with similar structural and thermal properties mainly due to the stresses it may suffer during use. The device is configured to be able to absorb tolerance variations and to have a resilience capable of providing resistance at the time when a connection undergoes mechanical stresses of performance, especially torsion.