A system and method for transacting an automated patient communications session is described. A patent health condition is monitored by regularly collecting physiological measures through an implantable medical device. A patient communications session is activated through a patient communications interface, including an implantable microphone and an implantable speaker in response to a patient-provided activation code. An identification of the patient is authenticated based on pre-defined uniquely identifying patient characteristics. Spoken patient information is received through the implantable microphone and verbal system information is played through the implantable speaker. The patient communications session is terminated by closing the patient communications interface. The physiological measures and the spoken patient information are sent.

System and method for transacting an automated patient communications session

A variable displacement oil pump for an automotive engine. The oil pump includes a cam ring accommodating thereinside a pump element having a rotor. The cam ring is swingingly movably accommodated in a housing and biased in a direction to increase an eccentricity amount of the cam ring relative to the axis of the rotor by a biasing member. First and second pressure chambers are defined inside the housing by the outer peripheral section of the cam ring. The first pressure chamber is supplied with a discharge pressure to be applied to the cam ring to oppose to a biasing force of the biasing member. The second pressure chamber is supplied with the discharge pressure to be applied to the cam ring to assist the biasing force of the biasing member. Additionally, a control device is provided for controlling supply of the discharge pressure to the second pressure chamber.

Variable displacement pump

A variable displacement vane-type fluid pump is provided which permits improved regulation of the pump discharge such that the pump can meet the various requirements of lubrication for internal combustion engines at all speeds with minimized use of power. Of course, the vane pump may also be utilized in a wide range of power transmission and other fluid distribution applications. The vane pump of the invention may also use both hydrostatic and mechanical actuators to control the position of its containment ring or eccentric ring and hence, regulate the output of the pump. According to yet another aspect of the present invention, to prevent inlet flow restriction or cavitation, a valve may be provided to permit some of the pump outlet or discharge flow to bleed into the pump inlet to provide needed velocity energy to the fluid flow into the pump inlet. A system for lubrication of an engine using a fixed displacement pump for providing an engine speed input for controlling a second main variable displacement type oil pump and maintaining a target oil pressure in the oil pressure circuit. A solenoid valve is used for venting output of the fixed displacement pump to create a second target oil pressure characteristic or curve when desired.

Variable displacement vane pump with variable target regulator

A variable capacity vane pump is provided, the pump having a pump control ring which is moveable to alter the capacity of the pump and the pump can be operated at either of at least two selected equilibrium pressures. The pump ring is moved by at least first and second control chambers, the control chambers abutting the control ring such that pressurized fluid supplied to them acts on the pump control ring to move the pump control ring to reduce the volumetric capacity of the pump. When pressurized fluid is supplied to only one control chamber, the pump operates at a first equilibrium pressure and when pressurized fluid is also supplied to the second chamber, the pump operates at a second equilibrium pressure. If desired, pressurized fluid can also be supplied only to the second control chamber to operate the pump at a third equilibrium pressure and/or additional control chambers can be provided if required.

Variable capacity vane pump with dual control chambers

A traditional variable displacement vane pump must be designed to provide maximum fluid pressure and thus experiences reduced energy efficiency when the system operating conditions do not necessitate such high requirements. A variable displacement variable pressure vane pump system is provided comprising a first control mechanism, which can be a control chamber (68) directly acting on the control slider (36) or a control chamber (68) and control cylinder (44) which acts on the control slider (36) and a second control mechanism which is a control chamber (72) and control cylinder (44) which acts on the control slider (36). A control valve (76), operated by an engine control unit or other suitable control mechanism, selectively provides pressurized lubrication oil to the second control mechanism to allow the output of the pump system to more closely match the requirements of the mechanical system.

Variable displacement variable pressure vane pump system

A process is disclosed for regulating the capacity of lubricant pumps. The capacity of the pump is regulated by the pressure at the pump outlet or at a consumer site, so that when the pressure increases the pump capacity is effectively reduced. A regulatable lubricant pump, in particular a vane cell pump (1), has a pressure-controlled regulating arrangement (2). In order to obtain a process for controlling lubricant pumps and a corresponding lubricant pump which as a whole consume less energy, the feeding capacity of the pump is additionally limited in an independent manner by detecting the temperature and/or speed of rotation. As for the lubricant pump itself, it is provided with a regulating arrangement (3) having a sensor (4) for the speed of rotation and/or temperature, as well as a regulating member (5), which regulate the effective pump capacity depending on the speed of rotation or temperature, besides the pressure regulating arrangement.

Process for regulating the capacity of lubricant pumps and lubricant pump therefor

Multi-stage regulator for lubricant pumps with continuously adjustable displaced volumes in particular for lubricant pumps, with a regulating piston to which pressure can be applied from pressure derived from the output side of the pump, and with increasing pressure can be displaced counter to the force of a flexible restoring element.

Multi-stage regulator for variable displacement pumps

Une pompe a cellules semi-rotative comprend un boitier (3), une bague de reglage (4) guidee etanche dans le boitier (3) et mobile transversalement au sens axial d'un rotor (1) qui est monte dans le boitier (3) et entoure par la bague de reglage (4). A semi-rotary pump cell comprises a housing (3), an adjusting ring (4) sealingly guided in the housing (3) and movable transversely to the axial direction of a rotor (1) which is mounted in the housing (3 ) and surrounded by the adjusting ring (4). La zone d'aspiration (7, 14) de la pompe est definie par le volume croissant dans le sens de rotation du rotor (1) d'une cellule rotative (5) formee entre deux pales adjacentes (2), le rotor (1) et la bague de reglage, et la zone de refoulement (8, 11) est definie par le volume decroissant dans le sens de rotation de la cellule rotative (5). The suction zone (7, 14) of the pump is defined by the increasing volume in the direction of rotation of the rotor (1) of a rotary cell (5) formed between two adjacent blades (2), the rotor (1 ) and the adjusting ring, and the delivery zone (8, 11) is defined by the decreasing volume in the direction of rotation of the rotary unit (5). Au moins un organe de reglage (22, 23) ajuste la position de la bague de reglage (4) en fonction des parametres respectifs de la pompe. At least one adjusting member (22, 23) adjusts the position of the adjusting ring (4) according to the respective parameters of the pump. Afin d'obtenir une pompe a cellules semi-rotative ayant une construction compacte et/ou simple et economique, au moins un evidement (20, 21) de reception d'un organe de reglage (22, 23) ouvert vers le cote exterieur de la bague de reglage (4) est menage dans la bague de reglage (4) a proximite de la zone de refoulement (8, 11). To obtain a semi-rotary pump cell having a compact construction and / or simple and inexpensive, at least one recess (20, 21) for receiving an adjustment member (22, 23) open towards the outside of the adjusting ring (4) is provided in the adjusting ring (4) near the discharge region (8, 11).

Compact controllable vane pump.

Verfahren zum Regeln der Pumpleistung von Schmiermittelpumpen und Schmiermittelpumpe hierfür

A multi-stage regulating valve is provided with a cylinder and an adjusting piston guided inside it to which a regulating pressure can be applied from one side and a return force from the other. Depending on the regulating pressure, the piston keeps at least one outlet aperture in the cylinder wall closed or partly or fully opens it and thus closes off a connection to the side of the piston to which the regulating pressure is applied or partly or fully opens it via the outlet aperture. To provide a multistage regulating valve which can alter the regulating characteristics over a wide range depending on the position of the piston even without the use of several return components, the piston consists of at least two partial pistons to which the regulating pressure can be applied, where the force of the return component can be applied to a first partial piston, whereby a follower interconnects the partial pistons in such a way that a return force is exerted on the second partial piston or other partial pistons via the first partial piston and the follower. The cylinder has at least one stop for the second or other partial pistons limiting the movement of the second or other partial pistons under the effect of the regulating pressure and against the action of the return component. The first partial piston is unaffected by the stop and remains movable against the return component if the regulating pressure increases further.

Multistage regulating valve

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