Patents by Inventor Stefan Hennes
Stefan Hennes has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240050878Abstract: A filter device and a filter element (14) having a filter head (10) and having a filter bowl (12) for mounting the replaceable filter element (14), characterized in that a compensation device (16) is provided, which acts between the filter head (10) and the filter element (14) and which, as a component of the filter element (14), has two shell parts (18, 20), one shell part (18) of which is secured stationarily to the filter element (14) and the other shell part (20) of which, in contrast, is designed to be movably guided, and in that one of the two shell parts (20) has a passage opening (22) for guiding a fluid flow.Type: ApplicationFiled: August 15, 2022Publication date: February 15, 2024Inventors: Dirk RĂ–DER, Stefan HENNES
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Publication number: 20220339566Abstract: A filter device for the filtration of fluids, at least consisting of a filter housing (10), which can be closed by means of a cover (40), and a filter element (30) accommodated in a replaceable manner in the filter housing (10), is characterized in that at least one functional element is present on the cover (40) and on the filter housing (10) and on the filter element (30) in such a way that the filtration of the fluid is only possible when all functional elements interact simultaneously.Type: ApplicationFiled: January 13, 2021Publication date: October 27, 2022Inventors: Volkmar KLEIN, Michael SAKRASCHINSKY, Stefan HENNES
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Publication number: 20210370202Abstract: A filter device having a filter housing (2) and a filter element (15) accommodated therein, the element material (44) of which for filtering a liquid extends between two end caps (40, 42), at least one end cap (40) of which is mounted on an element receptacle (14), wherein a bearing (46, 54), providing more than one degree of freedom, is used to articulate the filter element (15) on the element receptacle (14) via its one end cap (40), characterized in that the bearing has a convex bearing surface (46) that is guided in a concave bearing surface (54) and in that the respective bearing surface (46, 54) is part of a shell (55a, 55b), at least one (55b) of which has a passage (55c) for liquid media.Type: ApplicationFiled: November 12, 2019Publication date: December 2, 2021Inventors: Volkmar KLEIN, Stefan HENNES
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Patent number: 10926202Abstract: A filter device has a filter element (1) received in a filter housing of at least two interconnectable housing parts (17, 19). The filter element (1) can be fixed to a housing part (19) in a removable manner by one screw connection (32, 33). An additional screw connection (17, 41) is provided for connecting the housing parts (17, 19). To transmit a torque between threaded elements (33) of the one screw connection (32, 33) and of the additional screw connection (41), the threaded elements are rotatable relative to each other. A coupling device (43, 46, 61) is added that allows an additional rotational movement of the threaded element (17) of the additional screw connection (41) when the threaded element (33) of the one screw connection (32, 33) reaches the fixed rotational state.Type: GrantFiled: August 13, 2016Date of Patent: February 23, 2021Assignee: HYDAC FILTERTECHNIK GMBHInventors: Patrick Maurer, Stefan Hennes, Michael Sakraschinsky
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Publication number: 20180257012Abstract: The invention relates to a filter device with a filter element (1) which can be received in a filter housing that consists of at least two interconnectable housing parts (17, 19). The filter element (1) can be fixed to a housing part (19) in a removable manner by means of a screw connection (32, 33), and an additional screw connection (17, 41) is provided for connecting the housing parts (17, 19). The invention is characterized in that in order to transmit a torque between threaded elements (33) of the screw connection (32, 33) and of the additional screw connection (41), said threaded elements being rotatable relative to each other, a coupling device (43, 46, 61) is added which allows an additional rotational movement of the threaded element (17) of the additional screw connection (41) when the threaded element (33) of the screw connection (32, 33) reaches the fixed rotational state.Type: ApplicationFiled: August 13, 2016Publication date: September 13, 2018Inventors: Patrick MAURER, Stefan HENNES, Michael SAKRASCHINSKY
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Patent number: 9808749Abstract: A device for the suction filtration of fluids, such as urea solutions for exhaust gas after-treatment systems, has a tank (2) storing the fluid, and a filter element (34) arranged in the tank and provided with a filter medium (32) separating the tank contents from a clean-side inner filter cavity (20). The filter cavity extends from the bottom (10) of the tank (2) to a filling level height (28) and corresponds to a part of the filling volume of the tank (2). On the filter cavity (20), a suction connection (22) discharges the cleaned fluid by a suction pressure corresponding to a system operating pressure. The filter element (34) is provided with a filter medium (32), which is air-impermeable if suction pressures are within the range of a low system operating pressure.Type: GrantFiled: July 25, 2013Date of Patent: November 7, 2017Assignee: HYDAC FILTERTECHNIK GMBHInventors: Norbert Sann, Viktor Josef Lauer, Stefan Hennes, Michael Sakraschinsky, Alexander Wohlers, Paul Seibold
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Patent number: 9126129Abstract: A filter device includes a filter element (9) received in a housing (1). The housing can be closed by a cover part (3) having fluid ducts (35, 41). A connecting unit is provided to create a fluid-conducting connection between the filter element (9) and an associated fluid duct (35) of the cover part (3). The connecting unit is in the form of a coupling having a movable coupling part (33) creating the fluid connection in the functional state.Type: GrantFiled: July 9, 2008Date of Patent: September 8, 2015Assignee: HYDA FILTERTECHNIK GMBHInventors: Michael Sakraschinsky, Stefan Hennes
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Publication number: 20150202553Abstract: The invention relates to a device for the suction filtration of fluids, such as urea solutions for exhaust gas after-treatment systems, comprising a tank (2) storing the fluid, and a filter element (34) arranged therein provided with a filter medium (32), which separates the tank contents from a clean-side inner filter cavity (20) and extends from the bottom area (10) of the tank (2) to a filling level height (28), which corresponds to a part of the filling volume of the tank (2). On the filter cavity (20), a suction connection (22) is provided, via which the cleaned fluid can he discharged by way of a suction pressure corresponding to a system operating pressure. The invention is characterized in that the filter element (34) is provided with a filler medium (32), which is air-impermeable if suction pressures are within the range of a low system operating pressure.Type: ApplicationFiled: July 25, 2013Publication date: July 23, 2015Inventors: Norbert Sann, Viktor Josef Lauer, Stefan Hennes, Michael Sakraschinsky, Alexander Wohlers, Paul Seibold
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Patent number: 8852431Abstract: The invention relates to a filter device having at least one filter element (11) comprising a filter medium (27) disposed between two receiving parts (31, 35) and a connecting device located at the lower receiving part (35) for a fluid connection to a fluid device, in particular to a fluid tank (1), having a connecting part (45) disposed on the connecting device, said connecting part being pretensioned by the action of a first energy store (43) for a motion away from the upper receiving part (31) into a closed position blocking the connecting device, having a further, second energy store (49) for generating a relative motion between the lower receiving part (35) and a closing-off part (17) of the device, and having a sealing device (55) sealing between the lower receiving part (35) and the closing-off part (17) as soon as said part and the lower receiving part (35) make contact with each other under the influence of the second energy store (49).Type: GrantFiled: November 3, 2009Date of Patent: October 7, 2014Assignee: Hydac Filtertechnik GmbHInventors: Michael Sakraschinsky, Stefan Hennes
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Publication number: 20120018358Abstract: A filter apparatus, provided for installation in a fluid storage tank, having at least one preferably replaceable filter element (11), through which a fluid can flow from the outside to an inner hollow filter chamber (19), forming the clean side, and which is surrounded by a housing wall (1) which forms a fluid chamber (15), into which the cleaned fluid from the inner hollow filter chamber (19) can flow, the housing wall having at least one wall opening (31) which forms a fluid passage located within the region of the variable fluid level in the storage tank. Said filter apparatus is characterized in that a control device (39, 41, 43) is provided which can be actuated as a function of the fluid level the storage tank and brings the fluid passage of the at least one wall opening (31) close to the position of the surface of the fluid in the storage tank.Type: ApplicationFiled: March 10, 2010Publication date: January 26, 2012Inventors: Norbert Sann, Michael Sakraschinsky, Stefan Hennes
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Publication number: 20120018364Abstract: The invention relates to a filter device having at least one filter element (11) comprising a filter medium (27) disposed between two receiving parts (31, 35) and a connecting device located at the lower receiving part (35) for a fluid connection to a fluid device, in particular to a fluid tank (1), having a connecting part (45) disposed on the connecting device, said connecting part being pretensioned by the action of a first energy store (43) for a motion away from the upper receiving part (31) into a closed position blocking the connecting device, having a further, second energy store (49) for generating a relative motion between the lower receiving part (35) and a closing-off part (17) of the device, and having a sealing device (55) sealing between the lower receiving part (35) and the closing-off part (17) as soon as said part and the lower receiving part (35) make contact with each other under the influence of the second energy store (49).Type: ApplicationFiled: November 3, 2009Publication date: January 26, 2012Applicant: Hydac Filtertechnik GMBHInventors: Michael Sakraschinsky, Stefan Hennes
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Publication number: 20100282341Abstract: A filter device comprising a filter element (9), which can be received in a housing (1) that can be closed by means of a cover part (3) having fluid ducts (35, 41), a connecting unit being provided in order to create a fluid-conducting connection between the filter element (9) and an associated fluid duct (35) of the cover part (3), is characterized in that the connecting unit is configured in the form of a coupling having a movable coupling part (33), which in the functional state creates the fluid-conducting connection.Type: ApplicationFiled: July 9, 2008Publication date: November 11, 2010Inventors: Michael Sakraschinsky, Stefan Hennes
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Patent number: 7022228Abstract: A filter device includes a pot-shaped filter housing (1) that defines a longitudinal axis along which a filter element (13) can be inserted into and removed form the filter housing (1). A retaining device detachably retains the filter element (13) in the filter housing (1) and has first and second retaining elements on the inner side of the filter housing (1) and on the filter element (13) and interacting with one another. At least one set of the retaining elements has a shape coaxial to the longitudinal axis of the filter housing (1) and forms at least a part of a thread. When the filter element (13) is rotated about its longitudinal axis, it is locked in a form-fit.Type: GrantFiled: August 2, 2002Date of Patent: April 4, 2006Assignee: Hydac Filtertechnik GmbHInventors: Stefan Hennes, Michael Sakraschinsky, Patrik Maurer, Norbert Sann
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Patent number: 6932900Abstract: A filter device includes a filter housing (10) in which at least two filter elements (12, 14) with differing filter grades of filter material (16) are arranged. The filter elements are partially separated from each other by a separating device (18), with a through channel (24) of predetermined cross-section for a hydraulic connection between neighboring filter chambers (20, 22),. The filter chambers arranged prior to the filter materials (16) in the flow direction of the fluids for filtering. The filter device permits a combination of main- and side-stream filters in the smallest possible space, whereby very good purity levels for the filtered fluid are nevertheless achieved.Type: GrantFiled: January 3, 2001Date of Patent: August 23, 2005Assignee: Hydac Filtertechnik GmbHInventors: Norbert Sann, Martin Reik, Stefan Hennes, Karl-Heinz Leichner
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Publication number: 20040149640Abstract: The invention relates to a filter device comprising a pot-shaped filter housing (1) that defines a longitudinal axis along which a filter element (13) can be inserted into and removed from the filter housing (1). A retaining device detachably retains the filter element (13) in the filter housing (1) and comprises first and second retaining elements that are provided on the inner side of the filter housing (1) and on the filter element (13) and that interact with one another. At least one set of the retaining elements has a shape coaxial to the longitudinal axis of the filter housing (1) and forms at least a part of a thread in such a manner that, when the filter element (13) is rotated about its longitudinal axis, it is locked in a form-fit.Type: ApplicationFiled: December 9, 2003Publication date: August 5, 2004Inventors: Stefan Hennes, Michael Sakraschinsky, Patrik Maurer, Norbert Sann
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Patent number: 6695966Abstract: A filter element is provided with an ascending pipe and a filter material subject to soiling and is supported by a supporting pipe. The filter material is separable from the ascending pipe such that the multi-component ascending pipe can be reused and to reduce the weight of hazardous waste to be disposed of when the soiled filter material has been changed. The ascending pipe is provided at least on one of its ends with a reception for the filter material in such a manner that the filter material with the supporting pipe as one assembly (22) and with the ascending pipe (10) as another component are detachable coupled, allowing the exchange of the soiled filter material by new filter material while keeping the ascending pipe. The filter element can be assembled during production with less effort, thereby allowing for a reduction of costs.Type: GrantFiled: November 29, 2001Date of Patent: February 24, 2004Assignee: Hydac Filtertechnik GmbHInventors: Michael Sakraschinsky, Stefan Hennes
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Patent number: 6620316Abstract: A modular system for putting together different sized filter elements, especially filter elements having different lengths, more particularly filter devices for hydraulic fluids, comprising a support tube that defines an inner cavity in the corresponding filter element, said tube being surrounded by a filter mat that is substantially cylindrical and that matches the different dimensions and having passages to let the fluid pass through. The filter elements also contain at least one coupling member enabling connection on the end side of a corresponding support tube to an additional support tube having a location on the end side for interacting with and locking on the coupling member. Each coupling member is embodied as an attachment plug element with a crown consisting of interspaced tabs extending in axial direction and hooks for snapping on the location of the attached support tube.Type: GrantFiled: February 15, 2001Date of Patent: September 16, 2003Assignee: Hydac Filtertechnik GmbHInventors: Michael Sakraschinsky, Stefan Hennes
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Publication number: 20030106847Abstract: The invention relates to a filter device with a filter housing (10), in which at least two filter elements (12, 14), with differing filter grades of filter material (16), are arranged, which are each partially separated from each other by a separating device (18), with a through channel (24) of predetermined cross-section for a hydraulic connection between neighbouring filter chambers (20, 22), which are arranged prior to the filter materials (16) in the flow direction of the fluids for filtering. According to the invention, the filter device permits a combination of a so-called main- and a so-called side-stream filter in the smallest possible space, whereby very good purity levels for the filtered fluid are nevertheless achieved.Type: ApplicationFiled: September 30, 2002Publication date: June 12, 2003Inventors: Norbert Sann, Martin Reik, Stefan Hennes, Karl-Heinz Leichner