Abstract: An aspirator may include an aspirator body that defines an annular cavity, a central channel, and an annular slit. Fluid communication between the annular cavity and the central channel may be via the annular slit. The aspirator body may include an entrainment opening through which ambient air is configured to be entrained into the central channel in response to gas flowing from the annular cavity through the annular slit and into the central channel.

Abstract: An aspirator may include an aspirator body that defines an annular cavity, a central channel, and an annular slit. Fluid communication between the annular cavity and the central channel may be via the annular slit. The aspirator body may include an entrainment opening through which ambient air is configured to be entrained into the central channel in response to gas flowing from the annular cavity through the annular slit and into the central channel.

Abstract: A cylinder housing an oil chamber and a piston housing a pair of concentric gas chambers define a telescopingly compressible shock strut. Upon compression of the shock strut, oil under pressure flows from the oil chamber into a compartment defined in part by a floating piston of one of the gas chambers to urge translation of the floating piston if the pressure exerted is above a first threshold and to compress the gas within the chamber. When the oil under pressure exceeds a second threshold, a floating piston of the other of the gas chambers and forming a part of the compartment is urged to translate and to compress the gas in the other gas chamber. A relief valve associated with each gas chamber relieves pressure therein above a further threshold.