Abstract: A control module and method for operating the same includes a diurnal control valve module that opens a diurnal control valve (DCV) and an evaporative leak check module (ELCM) diverter valve control module that switches on an ELCM diverter valve. The control module includes a correlation module performs a correlation of a ELCM pressure signal and a fuel tank pressure signal and that generates a fault signal in response to the correlation when the DCV valve is open and the ELCM diverter valve is on.

Abstract: An exhaust gas recirculation system having at least one cooler with a housing and at least one valve with a pivotably actuated valve member on an inlet side is characterized in that an actuator for the valve is mounted to the housing of the cooler, which is connected to the valve via at least one lever and at least one connection member such as a coupling rod, a ball-and-socket joint being provided between at least one lever and at least one connection member such as a coupling rod.

Abstract: A method for providing intake air to an engine in a vehicle includes forming a mixture of fresh air and treated exhaust, and compressing the mixture upstream of a first throttle valve coupled to an intake manifold of the engine. The method further includes, during a higher engine-load condition, admitting the mixture to the intake manifold via the first throttle valve, and, during a lower engine-load condition, admitting fresh air to the intake manifold via a second throttle valve.

Abstract: A system and method for improving processing of gases contained within the crankcase of an internal combustion engine is presented. The system is especially suited for single boiling point fuels because it allows the storage of such fuels until the fuel can be opportunistically combusted.

Abstract: A toy launcher that can house a substantially large amount (e.g., 40, 60, 100, 200, etc.) of projectiles along the length of a rotatable projectile feed assembly. During use, a user can cause rotatable projectile feed assembly to rotate about it own axis and can cause projectiles to advance from the rotatable projectile feed assembly to a projectile launch assembly. At the projectile launch assembly, projectiles interact with at least one accelerator launching the projectile out of the toy launcher. The accelerator can be at least one rotating body.

Abstract: A rotary stone cutting tool and method for making countertops and the like includes a shank shaped for detachable connection with a rotary drive. A cup-shaped cutting blade is mounted on the outer end of the shank, and has a frusto-conical sidewall and an outer marginal edge with axially protruding cutting teeth. A plurality of cutting pads are embedded in the sidewall and protrude radially outwardly therefrom. The blade is advanced through a stone slab with the sidewall oriented generally perpendicular to the face of the stone slab to cut an arcuate portion of an inside corner with reduced waste.

Abstract: A grill comprising a front, a rear, a grill base, a first grill door and a second grill door. The first grill door comprises an opening and is in hinged communication with the grill base. The second grill door is in communication with the first grill door via a hinge, which is disposed at a rear portion of the opening. When the second grill door is in a closed position, the second grill door seals the opening in the first grill door. A method of grilling comprising the steps of opening the first grill door, placing food on the grill base and closing the first grill door to cook food. The method further comprises the steps of opening the first and the second grill door during the cooking process, thereby creating a flue that urges smoke away from the front of the grill and towards the rear of the grill.

Abstract: A grill comprising a front, a rear, a grill base, a grill lid and a grill door. The grill lid comprises an opening and is in hinged communication with the grill base. The grill door communicates with the grill lid via a hinge, which is disposed at a rear portion of the opening. When the grill door is closed, the grill door seals the opening in the grill lid. The grill lid includes a lifting-assist mechanism and the grill door has an opening-assist mechanism. A method of grilling comprising the steps of opening the grill lid, placing food on the grill base and closing the grill lid to cook food. The method further comprises the steps of opening the grill lid and the grill door during the cooking process, thereby creating a flue that urges smoke away from the front of the grill and towards the rear of the grill.

Abstract: A control arrangement for a gas stove, wherein the control arrangement includes a gas burner; a control element to switch the gas burner on and off; a signal transducer to generate a first signal that depends on a position of the control element; a first control apparatus to control, depending on the first signal of the signal transducer, igniting or extinguishing a flame on the gas burner; and a second control apparatus that is arranged between the signal transducer and the first control apparatus. In at least one position of the control element, a second signal is fed to the first control apparatus that simulates continuous switching on and off of the gas burner.

Abstract: The present invention discloses a disposable stove top covering that is used to protect the surface of the stove top during cooking. The stove top covering is comprised of a substantially planar sheet of material that may have decorative indicia or graphic thereon, such indicia may include recipes, instructions and/or information, etc. The cover is designed to protect the stove top as well as absorb fluids, such as oil, sauce and water. A bottom fluid impervious layer protects the stove top while an absorbent layer retains any spills with the top layer having micro holes for fluids to pass through and retained thereby. Also provided is a lip passing around the periphery of the cover and each heating element to contain fluids and food particle on the disposable cover.

Abstract: A glue gun (10) comprising a body member (3) in which a glue accommodating and melting chamber (4) for receiving stick glue is formed and combustion chamber 910) is also formed for accommodating a gas catalytic combustion element (14). A temperature responsive valve (25) controls the supply of fuel gas to the combustion chamber 910) for maintaining the temperature of the body member (3) at approximately 140° C.

Abstract: A solar water-heating apparatus comprises an outer container sized and configured to receive a smaller inner container. The inner container includes an opening formed in an upright wall and an opening formed in a floor. A gap is located between the two containers. Once the device has been filled with a liquid, the liquid present within the gap may be heated by solar energy. The device may include a valve to prevent unintended flow of the liquid.

Abstract: An apparatus and method for collecting solar energy are provided. The apparatus is a trough-type solar collector having one or more mirrors and lenses for directing solar radiation toward a receiver configured to receive a heat transfer fluid therein. The amount of solar radiation directed toward the receiver can be controlled by adjusting one or more of the mirrors and/or lenses or by adjusting a shade. Thus, the collector can direct different amounts or solar radiation toward the receiver, thereby selectively heating the receiver at different rates, e.g., to preheat the receiver, to heat fluid in the receiver for power generation, or to thaw solidified fluid in the receiver. Subsequently, the heated fluid can be used to generate steam and/or electricity.

Abstract: A solar water heater includes a number of elongate water heating units which can be interconnected in series. The solar water heater can be installed vertically or inclined to have maximum solar exposure. Each water heating unit can utilize inner and outer glass tubes, which may or may not be a twin glass tube, to collect and conserve solar thermal energy inside. An inner metal water container extends through an opening in the inner and outer glass tubes. Heat transfer elements can be inserted between the inner tube and the metal water container. The solar water heater can work on natural convection and city water pressure.

Abstract: A nebulizer includes a piezoelectric transducer for aerosolizing a drug solution in a disposable cup module disposed above the transducer. Acoustic waves generated by the transducer propagate sequentially through transmitting medium, a first barrier, coupling medium, and a second barrier that forms part of the cup module, and into the interior of the cup module. The transducer at least partially comprises silver. The silver fluidly contacts the transmitting medium to discourage bacteria growth in the transmitting medium. The device includes electronics components that drive the transducer and measure an electrical characteristic associated with the transducer during operation. The electronics components measure changes in the electrical characteristic to determine when the drug solution level falls below a predetermined threshold, and deactivates the device accordingly.

Abstract: A patient care unit (1) with a reclining surface has one or more docking devices designed as inductive coupling sites (7) for medical technical devices (10, 11, 12), which consume electrical energy and can be connected to the patient care unit. The inductive coupling sites (7) also supply the patient care unit (1) with electrical energy by means of an external line connection, which is likewise coupled inductively with the patient care unit (1).

Abstract: A method and apparatus are disclosed for determining airflow through a PAP device while applying PAP therapy. The actual speed of a blower 6 is measured. The desired motor current IDES required for the actual speed to approach or maintain a desired speed is used, together with the actual speed RPM ACT, in a flow estimation algorithm to determine flow through the PAP device. The estimation algorithm consists of a two-dimensional look-up table, where the inputs are the desired motor current and actual motor speed, and the output is the flow through the PAP device.

Abstract: A compact continuous positive airway pressure apparatus and method provide a flatter profile and more compact thickness, including a larger lateral dimension in order to be accommodated in conventional luggage designed to stow laptop computers having a smaller aspect ratio of thickness to length or thickness to width. Air tubing may be coiled within a case or coiled as about a spool-like configuration in the base unit of the device.

Abstract: A breathing assistance system configured to determine pressure drop may include a gas delivery system configured to deliver gas toward a patient, one or more sensors configured to measure one or more parameters of gas delivered by the gas delivery system, a calibration module, and a pressure drop calculation module. The calibration module may be configured to perform one or more pressure drop calibration tests, each pressure drop calibration test measuring a pressure drop in gas flowing through a breathing assistance system apparatus at a particular flow rate; and based at least on the results of the one or more pressure drop calibration tests, generating a non-linear equation relating (a) pressure drop in gas flowing through the breathing assistance system apparatus with (b) flow rate of gas flowing through the breathing assistance system apparatus.

Abstract: A breathing assistance apparatus operates in alternating inhalation and expiratory phases wherein a) the control means of the apparatus include selection means capable of selecting a pressure parameter or a flow rate parameter to define; b) the reference value for the gas source, the selection means are controlled by an automatic control unit being: I) connected to pressure and flow rate sensors situated on the inhalation duct to form a direct closed regulation loop for selecting a reference value parameter, II) associated to a program allowing the selection to be made in real time from a pressure or flow rate signal, so that the association of a direct closed regulation circuit for the selection of a reference value parameter with a valve permitting proportional operation, allows real time control of barometric and volumetric operating modes, between and during the inhalation and expiratory phases. The invention also concerns associated operating processes.

Abstract: A CPAP vent diffuser adapted to effectively seal around a vent of a CPAP mask comprises a chamber of porous cloth that moderates air flow from the vent of CPAP machine by increasing in the chamber walls the area the air flow has to move through thus decreasing the speed of the air.

Abstract: A cushion for a respiratory mask assembly includes a breathing chamber forming portion and a face contacting portion formed in one piece of an elastomeric material, and a gusset portion including one or more folds. The breathing chamber forming portion includes a mask interior breathing chamber and the face contacting portion is structured to engage a patient's face. The gusset portion is structured to provide flexibility to the face contacting portion. The breathing chamber forming portion includes a front side of the mask and the face contacting portion includes a rear side of the mask. The breathing chamber forming portion, when provided to a mask frame, includes an exterior surface exposed at the front side of the mask.

Abstract: A branching unit for delivering a respiratory gas of a subject is disclosed herein. The branching unit includes a first limb for delivering an expiratory gas during an expiratory phase and a second limb for delivering an inspiratory gas during an inspiratory phase. The branching unit also includes a third limb for delivering both the expiratory gas and the inspiratory gas and a common branching point for the first limb, the second limb and the third limb. The first limb, the second limb and the third limb include a volume for the respiratory gas and which volume includes both an active volume with the gas exchanging between the inspiratory phase and the expiratory phase and a dead volume for the respiratory gas with insufficient gas exchange from the inspiratory phase to the expiratory phase and the dead volume being less than 1 ml.

Abstract: A nasal cannula fitting, comprising in combination, a rigid plastic tubular first duct configured to directly endwise connect with apparatus assisting respiratory air, a relatively flexible plastic second duct fitting onto an end portion of the first duct, relatively flexible third plastic ducts integral with the second duct and diverging endwise therefrom to receive flow of the assistance air, and nasal cannula plastic tubing connected in series with the respective third ducts. Nasal prongs on the cannula tubing may carry pressure sealing toggling skirts.

Abstract: Methods of manipulating pulses of ultrasonic energy for use with an ophthalmic surgical device.

Abstract: A smoking article having a cylinder of smoking material and a filter system attached to the cylinder of smoking material. The filter system includes an upstream plug of filtering material, a downstream plug of filtering material, and a cavity between the upstream plug of filtering material and the downstream plug of filtering material. A flow restrictor is positioned within the cavity and has at least one orifice and a series of perforations provide ventilation to the smoking article.

Abstract: A system of applying liquid flavor to cut tobacco material includes a first tank of concentrated liquid flavor and a second tank of water. A venturi device is constructed and arranged to receive and meter concentrated liquid flavor and water from the first and second tanks and to discharge mixed flavor and water from an outlet end. A first line is connected between the first tank and a suction port on the venturi device, and a second line is connected between the second tank and an intake port on the venturi device. A spray assembly is in fluid communication with the discharge outlet of the venturi device for applying mixed flavor and water to cut tobacco.

Abstract: Methods for increasing the concentration of antioxidants during senescence and curing of tobacco leaves include application of a chemical solution. The methods include spraying the solution onto the tobacco plant prior to harvest and/or applying the chemical solution to the soil surrounding roots of growing tobacco plants. The application of the chemical solution preferably occurs between topping and harvest, and is optimized to stimulate the production of antioxidants and interfere with the formation of TSNAs during curing. The tobacco can be burley tobacco subjected to air curing.

Abstract: The present invention is directed to smoking articles having reduced carbon monoxide delivery are described. A carbon monoxide reducing agent is incorporated into the smoking article in order to reduce carbon monoxide levels in mainstream smoke. The carbon monoxide reducing agent may be, for instance, in metal oxide or in metal carbonate. The carbon monoxide reducing agent may be incorporated into a wrapper and/or into a column of smokable filler that are used to construct the smoking article.

Abstract: Provided is a smoking article including a smokeable filler with a high aerosol former content and a filter. Preferably, the smokeable filler includes about 4 wt % glycerin to about 35 wt % glycerin. The filter includes a cylindrical tube attached to the tobacco rod with tipping paper, a first filter segment at a location along said cylindrical tube adjacent and in a downstream relation to said tobacco rod, and a flow restricting filter segment at a location adjacent and in a downstream relation to the first filter segment. In an embodiment, the filter also includes a cavity adjacent and in a downstream relation to the flow restricting filter segment, and a ventilation zone at a location along the cavity including perforations that extend through the tipping paper and the cylindrical tube. Preferably, the ventilation zone is in a downstream relation to the flow restricting filter segment.

Abstract: Disclosed herein is a portable folding type hairstyling tool. The hairstyling tool includes a casing unit which also serves as a handle, and a hairstyling unit which is inserted into or unfolded from the casing unit to be used by pivoting. The hairstyling unit includes an electric heating part for applying heat to the hair, and the casing unit includes a power source. The hairstyling unit has a rotary switch around a hinge part, thus allowing power to be supplied to the electric heating part by a power source only when the hairstyling unit is unfolded from the casing unit.

Abstract: The present invention relates to an applicator (1) which allows for precise, non-messy and even application of a hair treatment composition to a hair strand. The applicator (1) comprises a plate (10) movably joined by a connection (30) to a well (20), a hair orientation means on the internal surface (101) of the plate (10) which extends towards the well (20) and a fluid metering means comprising a lower metering means (50) on the rim (222) of the well (20) and an upper metering means (60) on the internal surface of said plate (10), wherein said upper metering means (60) and lower metering means (50) independently comprise at least one resilient strip (13). When said applicator (1) is in a closed state, the lower metering means (50) and the upper metering means (60) are substantially juxtaposed to provide said fluid metering means.

Abstract: A denture treating apparatus employs a receptacle base with a chamber closed by a rotatable cover. A denture and an effervescing denture treating composition, such as a denture cleaning tablet is place in water in the chamber. When the chamber is closed, the pressure created by the effervescing tablet causes the active ingredients to penetrate small spaces in the denture. A seal is compressed between relative thick peripheral lips on the cover and receptacle base. Thinner sections of the receptacle base can bow under pressure to show that pressure is building up. A shiftable handle on the cover makes it easier for a user to close the cover and compress the seal.

Abstract: A fuel divider system includes a housing assembly and a flow passage network having an inlet, a primary outlet, and a secondary outlet. A fuel divider piston is slidably disposed within the housing assembly and movable between a flow biasing position and a flow equalizing position. A control chamber is fluidly coupled to the flow passage network and fluidly communicates with the piston. An inlet chamber, at least partially defined by the piston and the housing assembly, is fluidly coupled to the inlet. At least one channel is provided through the piston and configured to cooperate with the flow passage network to port the FD control chamber to: (i) the fuel pressure at the secondary outlet when the FD piston is in the flow biasing position, and (ii) the fuel pressure within the inlet chamber when the FD piston is in the flow equalizing position.

Abstract: A hose wagon wherein the hose wagon frame assembly is structured to rotatably support a hose reel so that the hose reel may rotate freely about a generally vertical axis and a generally horizontal axis. This is accomplished by providing a water supply assembly having two rotational interfaces; one allowing rotation about a vertical axis, the other allowing rotation about a horizontal axis. Further, the hose wagon is free of frame members that extend vertically into the possible path of travel of a hose disposed on the hose reel. The frame assembly includes a handle member that is structured to move between an upper, first position, wherein the handle is disposed on the upper side of the hose wagon, and a second position, wherein the handle is disposed at a location lower than the path of travel of the hose coming off the hose reel.

Abstract: An inflatable conduit plug is used to seal a conduit such as a floor drain or an air vent. The conduit plug includes a shroud that is removably sealed within the conduit so that fluids pass through the shroud opening. Axially disposed within the shroud is an inflatable bladder adapted for closing the shroud opening. The inflatable bladder is inflated by an inflation signal generated by a controller upon receipt of a contamination signal received from a remote contamination detector. The plug operates in a wireless environment and can be controlled remotely. The plug can also be adapted for diverting contamination away from sensitive lands and storm drains.

Abstract: A hydrant locking device inhibiting unauthorized operation of a fire hydrant and includes a flip-top lid positioning between an open configuration and a closed configuration relative to a base. The flip-top lid is hingedly connected to the base of the locking device. The base may be releasably secured to an operating nut of the fire hydrant or more specifically an operating nut extension that engages the operating nut of the fire hydrant. The flip-top lid may also include a sealed cavity that may include electronics. These electronics may be in electrical communication with a wireless mesh network.

Abstract: Internal valve apparatus are described. An example internal valve includes a body having a valve seat disposed between an inlet and an outlet. A flow control member operatively coupled to the body moves between a first position in which the flow control member engages the valve seat to restrict the flow of fluid through the valve and a second position in which the flow control member is spaced from the valve seat to allow the flow of fluid through the valve. The example internal valve further includes a removable actuation member disposed within the body and responsive to a fluid pressure to cause the flow control member to move between the first and second positions.

Abstract: An anti-flooding device (10) including a duct (12) for passage of a flow of liquid, and a limiter (14) inserted along the duct (12) for passage of liquid and defining a section for passage of the liquid that decreases progressively as the flowrate of liquid increases, with closing of the duct (12) once a given threshold flowrate has been reached. The limiter (14) has at least one male element (18) and at least one female element (20), which are mobile with respect to one another so that they slide into one another as the flowrate of liquid increases. Progressive insertion into one another of the male element (18) and the female element (20) defines the section of passage. The male element (18) and female element (20) are shaped with respect to one another so as to reduce the section of passage as the flowrate increases, with closing of the duct (12) for passage of liquid as soon as a given threshold flowrate is reached.

Abstract: A motorized valve has a housing having an inlet and an outlet to be connected to a pipeline, a saddle connected with the housing, a turn plug having a rod, the turn plug cooperating with the saddle, and a drive for turning the valve body and formed as a piezoelectric drive, the piezoelectric drive including a piezoelectric generator of radially directed standing acoustic waves, which is connected with the housing and is connectable with a pulse current source, and a rotor operatively connected with the piezoelectric generator and kinematically connected with the rod of the turn plug so as to turn the turn plug when the rotor is actuated by the piezoelectric generator.

Abstract: A three-port control valve assembly comprising a valve body having two valve seats facing in a common direction and disposed along a central bore terminating in an exhaust port and communicating with a supply port and a common port. A pintle shaft connected to a solenoid actuator extends into the central bore. A first valve head mounted on the pintle shaft mates with the first valve seat to connect the supply port to the common port. While the solenoid is de-energized, supply pressure keeps the first valve closed. A second valve head mates with the second valve seat to connect the common port to the exhaust port. Opening of the first valve closes the second valve via supply oil pressure. When the first valve closes, the second valve is opened by a spring disposed between the second valve head and the exhaust port.

Abstract: A modular coupling system allows a combined gas canister and integral regulator to be used with a wide range of different utilizer devices such as flow meter, conservor or delivery apparatus. A first coupling part is secured to the pressurized gas canister permanently, and carries a combined main delivery valve and venting valve to allow connection of the gas utilizer to the canister by means of a second coupling part formed integrally with or attached to the gas utilizer device by a simple push and twist action which, upon fitting, closes the venting valve; and opens the main delivery valve in sequence.

Abstract: An end cap for sealing an end of a tubular wall is provided. The end cap includes a circular-shaped body having an inner surface defining an aperture that extends into the circular-shaped body but not completely through the circular-shaped body. The end cap further includes a sealing member disposed on at least a portion of the inner surface of the circular-shaped body. The end cap further includes first and second finger portions extending in a first direction from the circular-shaped body that are configured to removably engage first and second notches in the tubular wall such that the inner surface contacts an outer surface of the tubular wall and the end cap is removably attached to the tubular wall.

Abstract: A subsea flexible pipe, including an internal sealing sheath (18), at least one tensile pressure armor layer (14, 16) wound around the internal sealing sheath, a retaining layer (12) having at least one reinforcing strip (34), the reinforcing strip having filamentary strands (36) directed substantially longitudinally. The filamentary strands (36) having polymer fibers (38). The polymer fibers have, at room temperature, an elastic modulus in excess of 55 GPa so that the reinforcing strip is able to prevent radial expansion of the armor layer, when the armor layer experiences radial force; and the polymer fibers furthermore have an elongation at break in excess of 4% such that the reinforcing strip is able to undergo deformation without breaking.

Abstract: An arrestor for arresting an axial ductile propagating fracture in a pipeline transporting a high-energy fluid is made from a material such that the arrestor deforms sufficiently when encountering a propagating fracture that the propagating fracture continues at least under the arrestor but the arrestor has enough strength that it ceases the crack propagation without ring-off of the pipeline. The material is filled with fiber characterized by having a stress-strain curve that passes thru the ranges between about 25 and 200 ksi in stress, and a deformation ranging from between about 5% strain and 35% strain, and having a diameter ranging between about 0.002 and 0.020 inches.

Abstract: A medical liquid filling system and associated methods are provided, the system comprising a disposable and a drive system. The disposable includes a tubular member and a piston slidably disposed within the tubular member for retraction and advancement within at least a first portion of the tubular member. The disposable may include a seal member for sealing the first portion of the tubular member and may be interconnected to the piston for co-movement therewith. The drive system may include a piston drive member selectively interconnectable to the piston for driven advancement and retraction of the piston within the tubular member. The drive system may be interconnected to a controller, which may be operable to automate or semi-automate various filling operations. A user interface may be interconnected to the controller for providing input of various system operation parameters, which may be communicated to the controller to facilitate automated or semi-automated operation of the filing system.

Abstract: A liquid delivery system for supplying liquid from a portable container to a destination and removing vapor from the destination comprises a portable container, an elongate flexible liquid delivery hose, and an elongate flexible vapor recovery hose. The liquid delivery hose receives liquid from the portable container, and delivers the received liquid to a remote destination. The vapor recovery hose receives vapor from the remote destination, and delivers the received vapor to the substantially hollow interior of the portable container. The liquid delivery hose and the vapor recovery hose permit the movement of the liquid outlet of the liquid delivery hose to more than one selected remote destination while the container remains substantially stationary. Reduced air pressure in the portable container resulting from the removal of the liquid therefrom, causes vapor to be suctioned via the vapor recovery hose into the portable container.

Abstract: Apparatus for filling containers with liquids and in particular with beverages, includes a reservoir for the liquid to be bottled and a connecting line for transporting the liquid from the reservoir to a filling device. The filling device has a first valve device for controlling a liquid flow into the container. The apparatus has a second valve device arranged in the connecting line in series with the first valve device, wherein the quantity of liquid flowing past the second valve device and the quantity of liquid reaching the filling device are essentially identical.

Abstract: A system and method for short-range ultrasonic detecting of a target is proposed herein to be used for example in a liquid-dispensing system such as those provided in home refrigerators. The system comprises a sensor assembly including a transmitter and a receiver positioned side by side so as to yield respective transmitting and receiving beams which overlap to define an asymmetrical shaped detection area, a controller coupled to both the transmitter and receiver to activate the transmitter and for receiving echoes indicative of the target from the receiver and to the dispensing system for opening a valve of the dispensing system when a target is detected. Noises and false alarm rate minimization methods are implemented, including variable relevance zones and requiring a void of signal before excitation.

Abstract: In a tank system, a venting line (6) connects the fuel tank to an activated carbon filter, and a recirculating line (10) opens into a filler head (3). In order to prevent the penetration of liquid fuel into the activated carbon filter, to permit the seal to be checked by applying a partial vacuum and to provide a filler head which can be manufactured inexpensively, an insertion body (22) is provided which forms a funnel (23) which is adjoined by a neck (24) which accommodates the fuel nozzle, which insertion body (22) has, in addition to the neck (24), two vertical blind holes (31, 32), open at the bottom, and a transverse duct (33) which connects the latter, wherein the first blind hole (31) is connected to the recirculating line (10), and a float (40), which clears or closes off the connection to the transverse duct (33), is guided in the second blind hole (32).