A vacuum motor comprising a working plunger, an internal space, in which the working plunger is arranged such that it is mobile in linear direction, a resetting element that exerts, at least for part of the time, a force on the working plunger that acts in the direction of a front side of the intern
A vacuum motor comprising a working plunger, an internal space, in which the working plunger is arranged such that it is mobile in linear direction, a resetting element that exerts, at least for part of the time, a force on the working plunger that acts in the direction of a front side of the internal space, a gas inlet opening for supplying ambient air or a compressed gas into the internal space, and a gas outlet opening for discharging the gas from the internal space. The gas outlet opening is connectable to a negative pressure source, whereby a control plunger is arranged between the working plunger and a rear side of the internal space such as to be mobile in linear direction in the internal space. The control plunger is supported as in a bearing such as to be mobile with respect to the working plunger, and a catch element and/or a spacer is arranged on said working plunger and/or control plunger, whereby the catch element, upon a motion of the working plunger towards the front side of the internal space, transfers the control plunger into the first position, and whereby the catch element or the spacer, upon a motion of the working plunger towards the rear side of the internal space, transfers the control plunger into the second position.
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1. A vacuum motor comprising a working plunger,an internal space, in which the working plunger is arranged such that it is mobile in linear direction,a resetting element that exerts, at least for part of the time, a force on the working plunger that acts in the direction of a front side of the inter
1. A vacuum motor comprising a working plunger,an internal space, in which the working plunger is arranged such that it is mobile in linear direction,a resetting element that exerts, at least for part of the time, a force on the working plunger that acts in the direction of a front side of the internal space,a gas inlet opening for supplying ambient air or a compressed gas into the internal space, anda gas outlet opening for discharging the gas from the internal space, whereinthe gas outlet opening is connectable to a negative pressure source, whereby a control plunger is arranged between the working plunger and a rear side of the internal space such as to be mobile in linear direction in the internal space,the control plunger, in a first position, does not cover the gas outlet opening and covers the gas inlet opening and, in a second position, does not cover the gas inlet opening and covers the gas outlet opening, the control plunger is supported as in a bearing such as to be mobile with respect to the working plunger, and a catch element and/or a spacer is arranged on said working plunger and/or control plunger,the catch element, upon a motion of the working plunger towards the front side of the internal space, transfers the control plunger into the first position,the catch element or the spacer, upon a motion of the working plunger towards the rear side of the internal space, transfers the control plunger into the second position, andthe control plunger, in a third position between the first position and the second position, covers both the gas inlet opening and the gas outlet opening. 2. The vacuum motor according to claim 1, wherein the internal space between the working plunger and the rear side is closed except for the gas inlet opening and the gas outlet opening. 3. The vacuum motor according to claim 1, wherein the catch element, upon a motion of the working plunger away from the control plunger, pulls the control plunger along in the direction of the working plunger and transfers the control plunger into the first position, and the catch element and/or the spacer, upon a motion of the working plunger towards the control plunger, pushes the control plunger in the direction of the rear side and transfers the control plunger into the second position. 4. The vacuum motor according to claim 1, wherein the resetting element is an elastic compression spring that is arranged in the internal space between the working plunger and the rear side of the internal space. 5. The vacuum motor according to claim 1, wherein the control plunger, in the first position, is pulled via the catch element in the direction of the front side by the resetting element, whereby the gas outlet opening opens into the intervening space between the control plunger and the rear side of the internal space. 6. The vacuum motor according to claim 1, wherein at least one gas-permeable passage is arranged in the control plunger and connects the front side of the control plunger facing the working plunger to the rear side of the control plunger facing the rear side of the internal space in gas-impermeable manner. 7. The vacuum motor according to claim 1, wherein the working plunger touches against the internal wall of the internal space by its entire circumference, preferably touches by its entire circumference in gas-tight and pressure-tight manner against the internal space by means of a sealing element. 8. The vacuum motor according to claim 1, an ejection opening is provided in the front side of the internal space opposite from the rear side, and a liquid supply opening is arranged in the front side and/or in the lateral wall of the internal space and the liquid supply opening is not covered by the working plunger at least for part of the time and, in the non-covered state, is arranged between the working plunger and the front side of the internal space. 9. The vacuum motor according to claim 8, wherein the ejection opening is connected to the surroundings by a valve element, in particular a lip valve, whereby the valve element is opened in the presence of sufficient over-pressure as compared to the ambient pressure and is closed otherwise, and in that a tube or a hose with a non-return valve is connected on the liquid supply opening and opens in the presence of a negative pressure in the internal space between the working plunger and the front side of the internal space and thus enables liquid to be supplied into the internal space. 10. The vacuum motor according to claim 8, wherein the working plunger comprises, on the side facing the front side, a pump plunger that has an at least 50% smaller cross-sectional surface area than the part of the working plunger facing the rear side, whereby the cross-section of the internal space is adapted to the cross-section of the pump plunger and to the cross-section of the working plunger. 11. The vacuum motor according to claim 1, wherein the catch element is a string, a cable, a thread, a chain or an elastic spring that is attached to the working plunger and to the control plunger or the catch element comprises a rod, a string, a cable, a thread, a chain or an elastic spring that is attached to the working plunger or to the control plunger and has a catch attached to it that engages, upon the periodical motion of the working plunger, a projection in the working plunger or in the control plunger, whereby the catch element is provided by a rod that is attached to the working plunger and extends through a feed-through in the control plunger and has a catch attached to it that does not fit through the feed-through in the control plunger and engages the feed-through on the rear side of the feed-through of the control plunger in order to pull the control plunger along, when the working plunger is sufficiently far away from the control plunger for this purpose and moves in the direction away from the control plunger. 12. The vacuum motor according to claim 1, wherein the internal space, at least regions thereof, is cylindrical or is cylindrical in the region of a working space of the working plunger or in the entire swept volume of the working plunger and control plunger. 13. The vacuum motor according to claim 1, wherein the working plunger comprises two differently-sized cross-sectional surfaces perpendicular to the linear motion direction of the working plunger, whereby the internal space comprises matching internal walls with different cross-sectional surfaces and the cross-sectional surface on the side of the working plunger facing the rear side is at least 100% larger than the cross-sectional surface of the opposite front side of the working plunger, wherein the cross-sectional surface on the side of the working plunger facing the rear side is at least four times the size of the cross-sectional surface of the opposite front side of the working plunger. 14. The vacuum motor according to claim 1, wherein a second resetting element is arranged in the internal space, which exerts a force on the control plunger in the direction of the working plunger, at least for part of the time, while the vacuum motor is running, whereby an elastic compression spring is arranged between the control plunger and the rear side of the internal space as second resetting element. 15. A lavage system comprising at least one vacuum motor according to claim 1, in which the at least one vacuum motor is usable to generate a periodical spray puff of a liquid. 16. A method for generating a periodical motion by means of a vacuum or negative pressure, the method comprising: providing the vacuum motor according to claim 1, wherein the working plunger and the control plunger, in a starting state, are situated in the internal space such as to be at a first distance from each other, whereby the control plunger closes the gas inlet opening and the gas outlet opening is open;expelling gas between the working plunger and the control plunger and between the working plunger and the rear side of the internal space through the gas outlet opening;moving the working plunger in the direction of the rear side of the internal space towards the control plunger by the pressure difference between the gas pressure exerting on the front side versus the gas pressure exerting on the rear side of the working plunger, whereby the distance between the working plunger and the control plunger decreases and the resetting element takes up and stores energy due to the motion of the working plunger;pushing the control plunger along by the working plunger by means of the catch element or a spacer, wherein the control plunger closes the gas outlet opening due to the motion of the control plunger and the control plunger opens the gas inlet opening due to the motion of the control plunger;flowing a compressed gas or ambient air flows through the gas inlet opening into the internal space, wherein the resetting element accelerates the working plunger in the direction of the front side of the internal space; andpulling the control plunger along by the working plunger by means of the catch element and moves the same in the direction of the front side of the internal space, preferably as soon as a first distance is reached, wherein the gas inlet opening is closed again by the reverse motion of the control plunger and the reverse motion of the control plunger opens the gas outlet opening again such that the gas between the working plunger and the rear side of the internal space is drawn out of the internal space again,wherein the second distance between working plunger and control plunger is adjusted by means of at least one spacer or the catch element and the first distance between working plunger and control plunger is adjusted by the catch element. 17. The method according to claim 16, wherein the cycle repeats upon renewed evacuation of the gas situated in the internal space between the working plunger and the rear side of the internal space. 18. A method for generating a spray puff comprising the method according to claim 16, wherein, upon a motion of the working plunger away from the rear side of the internal space, a rinsing liquid or a liquid-gas mixture is ejected from the space between the working plunger and the front side of the internal space through an ejection opening on the front side of the internal space, and further wherein, upon a motion of the working plunger towards the rear side of the internal space, a liquid or a liquid-gas mixture is pushed or pulled through a liquid supply opening into the space between the working plunger, in particular of a pump plunger, and the front side of the internal space. 19. The method according to claim 18, wherein, upon the motion of the working plunger towards the front side of the internal space, the pressure in the space between the working plunger and the front side of the internal space opens or maintains open a valve at the ejection opening and closes or maintains closed a non-return valve connected to the liquid supply opening, and further wherein, upon the motion of the working plunger towards the rear side of the internal space, the lesser pressure in the space between the working plunger and the front side of the internal space closes or maintains closed the valve on the ejection opening and opens or maintains open the non-return valve connected to the liquid supply opening.
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이 특허에 인용된 특허 (7)
Vogt, Sebastian; Buechner, Hubert, Compressed gas motor and lavage system.
Bales Thomas O. (Miami FL) Solar Matthew S. (Cooper City FL) Sixto ; Jr. Robert (Miami FL) Smith Kevin W. (Coral Gables FL), Medical fluid pump powered by a constant source of vacuum.
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