A pulsation damper (100) for a condensate pump comprising a body (105) having a fluid inlet (115), a fluid outlet (125), an inner wall portion (107) and an outer wall portion (108), wherein the inner (107) and outer (108) wall portions define an inner fluid region (160) and an outer fluid region (165), wherein the inner fluid region (160) is in fluid communication with the outer fluid region (165), wherein a fluid flow path is formed from the fluid inlet (115) to the fluid outlet (125) via the inner fluid region (160), wherein the outer fluid region (165) is in fluid communication with an air inlet (130) and configured to maintain an air pocket, and wherein the air pocket is configured to dissipate pulsations within liquid entering the fluid inlet (115) prior to being discharged from the fluid outlet (125).

A technique for reducing harmonic vibration in a multiplex multi-pump system. The technique includes establishing a lower bound of system specific vibration-related information such as via pressure variation or other vibration indicator. Establishing the lower bound may be achieved through simulation with the system or through an initial sampling period of pump operation. During this time, random perturbations through a subset of the pumps may be utilized to disrupt timing or phase of the subset. Thus, system vibration may randomly increase or decrease upon each perturbation. Regardless, with a sufficient number of sampled perturbations, the lower bound may be established. Therefore, actual controlled system operations may proceed, again employing random perturbations until operation of the system close to the known lower bound is substantially attained.

Presented herein are systems and methods for attenuating certain pulsations in a hydraulic system comprising a pump and a hydraulic actuator. In certain aspects, an accumulator comprising an internal volume that is divided into a working chamber and a contained chamber may be utilized to at least partially attenuate propagation of certain pulsations in the system. The working chamber may be fluidically coupled to the pump via a first flow path and fluidically coupled to a chamber of the actuator via a second flow path. The system may be designed such that a first inertance of the first flow path is greater than a second inertance of the second flow path. Additionally or alternatively, the system may be designed such that a resonance associated with the first inertance and a compliance of the accumulator may occur at a resonance frequency of less than 90 Hz.

A blood pressure monitor configured to removably mount to a cuff in a substantially symmetrical position with respect to a width of the cuff can include a housing defining an interior, a first port, and a second port. The first port can: secure to a first prong of the cuff when the cuff is mounted in a first orientation; receive and secure to a second prong of the cuff when the cuff is mounted in a second orientation; and enable fluid communication between the interior and at least one of a first fluid passage within the first prong and a second fluid passage within the second prong. The second port can: secure to the second prong of the cuff when the cuff is mounted in the first orientation; and receive and secure to the first prong of the cuff when the cuff is mounted in the second orientation.

A rocking piston vacuum pump or compressor may have a sound attenuation assembly. The sound attenuation assembly may comprise a sound attenuation chamber. The chamber may have a first silencer disposed therein with sound dampening foam disposed therein. A second silencer may be disposed in series relative to the first silencer and may be disposed externally of the sound attenuation chamber.

A pump assembly includes a pneumatic pump with a pump body having a discharge passage. The pump is operable to discharge compressed air through the discharge passage. The pump assembly also includes a cap adjacent the pump body and at least partially enclosing a first volume in communication with the discharge passage, and a casing at least partially surrounding the pump. The pump assembly further includes a second volume defined between the casing and the cap, the second volume in fluid communication with the first volume via an opening in the cap, and a casing outlet in fluid communication with the second volume. The pump assembly is configured such that the compressed air flows through the first volume and the second volume before being discharged from the casing through the casing outlet.

Provided is a hydraulic unit of a brake system including a housing; an oil supply part configured to supply oil to the housing; an oil discharge part configured to discharge the oil, supplied to the housing through the oil supply part, to the outside of the housing; and a piston movably mounted on the housing, and configured to open and close the oil supply part and the oil discharge part.

Disclosed is an air compressing apparatus with a dry-air internal-emission trap unit, and more specifically, to an air compressing apparatus with a dry-air internal-emission trap unit which solves various problems arising due to venting and improves an on-site environment where compressed air is used by guiding the venting to an inside of a system for compressing air rather than guiding the venting in the system for compressing air to the outside (atmosphere), and which maximizes energy efficiency and obtains a virtuous circle of energy by enabling compressed air that is discarded to be reused.

Presented herein are systems and methods for attenuating certain pulsations in a hydraulic system comprising a pump and a hydraulic actuator. In certain aspects, an accumulator comprising an internal volume that is divided into a working chamber and a contained chamber may be utilized to at least partially attenuate propagation of certain pulsations in the system. The working chamber may be fluidically coupled to the pump via a first flow path and fluidically coupled to a chamber of the actuator via a second flow path. The system may be designed such that a first inertance of the first flow path is greater than a second inertance of the second flow path. Additionally or alternatively, the system may be designed such that a resonance associated with the first inertance and a compliance of the accumulator may occur at a resonance frequency of less than 90 Hz.

A charging station for providing power to a physiological monitoring device can include a charging bay and a tray. The charging bay can include a charging port configured to receive power from a power source. The tray can be positioned within and movably mounted relative to the charging bay. The tray can be further configured to secure the physiological monitoring device and move between a first position and a second position. In the first position, the tray can be spaced away from the charging port, and, in the second position, the tray can be positioned proximate the charging port, thereby allowing the physiological monitoring device to electrically connect to the charging port.