Abstract:
Pumpenvorrichtung umfassend einen in einem Pumpengehäuse (10) längsverfahrbar angeordneten Pumpenkolben (12), der von einer Betätigungsmagneteinrichtung (14) angesteuert auf ein Einlassventil (16) und ein Auslassventil (18) einwirkt, wobei das Einlassventil (16) beim Ansaughub des Pumpenkolbens (12) öffnet und das Auslassventil (18) bei dessen Förderhub. Das Einlassventil (16) weist einen ringförmigen Ventilkolben (20) auf, der das Pumpengehäuse (10) umfasst, das eine Ein- (22) und eine Austrittstelle (24) für Fluid aufweist. Der Ventilkolben (20) weist eine Druckmeldefläche (26) auf, die vom Pumpenkolben (12) derart angesteuert ist, dass beim Ansaughub die Druckmeldefläche (26) des Ventilkolbens (20) entgegen der Wirkung eines Energiespeichers (28) in Verfahrrichtung des Pumpenkolbens (12) mit bewegt ist und dabei einen Fluidweg in einen Pumpenraum (30) des Pumpengehäuses (10) mit dem Pumpenkolben (12) frei gibt, und dass beim Förderhub der Ventilkolben (20) des Einlassventiles (16) unter der Wirkung des Energiespeichers (28) und der Druckmeldefläche (26) diesen Fluidweg sperrt und das Auslassventil (18) aufsteuert.
Abstract:
A pressure regulator includes a housing having an inlet cap with an inlet flow passage and an outlet cap with an outlet flow passage. A plunger is reciprocally mounted in the housing. A stationary regulator valve seat is disposed between the inlet flow passage and an inlet to the plunger. A drain check shuttle is disposed in the inlet cap and positioned downstream of the regulator valve seat to prevent water from draining out of the regulator when an inlet water pressure is below a predetermined threshold.
Abstract:
An automatic ring valve (10) comprising a valve seat (12) provided with a plurality of gas flow passages (14) arranged according to at least one annular row, at least a shutter comprising at least one ring-shaped portion (18) for selectively closing and opening the gas flow passages (14), wherein said ring-shaped portion of the shutter comprises a fiber-reinforced matrix (40), at least one contrasting member for contrasting an opening movement of ring-shaped portion of the shutter, wherein said ring-shaped portion of the shutter comprises continuous fibers, at least some of said fibers developing for at least 360° of the annular development of the ring-shaped portion.
Abstract:
This invention pertains to a fluid operated valve whereby the valve open or closed status is controlled by the fluid flowing in the valve. The valve geometry is such that it makes use of the fluid and the prevailing fluid flow characteristics to assert control over the period of the opening and closing events and subsequent mass discharge through the valve during these events. Valve geometry is used also to reduce the relative velocity between the valve body and the moving element as the moving element approaches the fully open or fully closed position.
Abstract:
The invention refers to closing and damping disks, designed to fit gas compressor valves. According to this invention, the disks are made of both one wearing layer (d) with a thickness of 0.1-0.3 mm and one layer made of an antifriction material (e). They have a centering hole (b), some slots (a) marked out by some arc-shaped walls, at least one blocking hole (c) preventing disk"s rotation inside the valve, so that the disk could be used on both sides in turn, and some beams (1 ) of equal strength resulting from the material remaining at the end of the slots (a) .
Abstract:
A valve assembly (1) operable to allow or prevent the flow of fluid to or from a working chamber of a fluid-operated machine, comprising radially spaced apart inner and outer annular valve seats (8, 15) defining an annular passage therebetween, a valve member comprising a sealing ring (21), and means (3, 7, 26, 25) for moving the valve member axially between a first position in which the sealing ring (21) is in seating engagement with the annular valve seats to close the annular passage to fluid flow therethrough and a second position in which the sealing ring (21) is spaced from the annular valve seats (8, 15) so that the annular passage is open to fluid flow therethrough. The valve assembly further comprises axially spaced apart first and second valve guide means (6) for guiding the valve member during axial movement between its first and second positions.
Abstract:
Check valves include a valve seat and a movable valve member, or piston. Movement of the piston is what allows fluid to either flow or be prevented from flowing. A magnetic check valve (20) is provided that contains an annular piston (13), which is configured such that the fluid flows through a central aperture (19) in the piston. Fuel cell systems include a cathode loop which is in contact with the proton exchange membrane (REM). The REM is sensitive to fowling by contaminants that may be present in the ambient air. The magnetic check valve apparatus disclosed herein prevents backflow of air through the exhaust side of the cathode loop. The valve is used on the inlet side of the cathode as well.
Abstract:
Sitzventil (10), insbesondere Plattenventil, mit einer Längsachse (L), mit einem Ventilsitz (12) aufweisend eine Mehrzahl von Ventilsitzdurchlasskanälen (18), mit einem in Richtung der Längsachse (L) beabstandet zum Ventilsitz (12) angeordneten Fänger (14) und mit einem zwischen dem Ventilsitz (12) und dem Fänger (14) beweglich angeordneten Dichtelement (16) zum Öffnen und Schliessen der Ventilsitzdurchlasskanäle (18), wobei mindestens eine der als Ventilsitz (12) oder Fänger (14) ausgebildeten Ventilkomponenten eine Mehrzahl von Durchlasskanalbegrenzungsabschnitten (36, 52) sowie eine Mehrzahl von Stegabschnitten (38, 54) aufweist, wobei die Durchlasskanalbegrenzungsabschnitte (36, 52) Ventilsitzdurchlasskanäle (18) und/oder Fängerdurchlasskanäle (48) ausbilden, wobei die Durchlasskanalbegrenzungsabschnitte (36, 52) und die Stegabschnitte (38, 54) gegenseitig jeweils unter einem Winkel (α) verlaufen, wobei mindestens eine der als Ventilsitz (12) oder Fänger (14) ausgebildeten Ventilkomponenten zumindest abschnittsweise durch additive Fertigung erzeugt ist, und wobei zumindest einer der Durchlasskanalbegrenzungsabschnitte (36, 52) in Richtung der Längsachse (L) der jeweiligen Ventilkomponente kürzer dimensioniert ist als einer der Stegabschnitte (38, 54) der jeweiligen Ventilkomponente.
Abstract:
The present disclosure refers to an apparatus for feeding an infant animal has in one embodiment a nipple combination comprising a one-way valve engaged with the proximal end of the tube of a nipple, and an open rather than self-sealing nipple aperture. A self-sealing nipple aperture is obviated by the one-way valve in the distal end of the tube of the nipple.
Abstract:
A reciprocating gas compressor valve having a plurality of clusters of kidney shaped holes positioned along a common circular or annular locus in the main body and a sealing element with a top portion, a bottom portion and a tubular section. The tubular section is integrally connected to the top portion and bottom portion. In an open position, a flow pathway is provided through the clusters of kidney shaped holes and the tubular section and the bottom profile abuts a stop surface of the valve. In a closed position, the top profile abuts the seat for sealing gas flow within the valve.