Patents Assigned to Dieter Wildfang GmbH
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Patent number: 6902123Abstract: The invention relates to a sanitary fitting (5) including an external housing (2) that has at least one housing section (6, 7, 30), the housing section (6, 7, 30) having an insertion opening (10) on an inlet side. At least one functional unit can be inserted through said opening into the interior of the housing until it abuts an insertion stop (18, 19, 29). A housing clearance (20, 21, 22) for receiving the protruding part of the functional unit(s) that projects beyond the insertion stop is located upstream and/or downstream of the insertion stop (18, 19, 29) in the direction of insertion.Type: GrantFiled: May 31, 2001Date of Patent: June 7, 2005Assignee: Dieter Wildfang GmbHInventors: Hermann Grether, Christoph Weis
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Patent number: 6892964Abstract: The invention relates to a jet regulator (1), comprising a jet regulator housing (2), within the interior of which a jet regulation device (4) is provided. According to the invention, such a jet regulator (1) can be produced at low cost, by means of simple conventional production techniques with simultaneous anti-scaling effect on the jet regulation device (4), whereby the jet regulation device (4) comprises several insertable components (9, 10), which may be inserted in series in the jet regulator housing (2) in the direction of flow (Pf1). The insertable components (9, 10) comprise passage openings (11), which are unidirectionally defined and extend across the cross-section of the passage, and the passage openings (11) of adjacent insertable components (9, 10) are arranged offset to each other in the circumferential direction of the jet regulator housing (2), or in the direction of flow (Pf1) of the jet regulator (1).Type: GrantFiled: May 18, 2001Date of Patent: May 17, 2005Assignee: Dieter Wildfang GmbHInventors: Hermann Grether, Christoph Weis
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Patent number: 6779554Abstract: The invention relates to a backflow preventing check valve (1) comprising a housing (2) in which a closing member (3) is arranged. The closing member is moveable between a closed position and an open position and is disposed on a valve seat with a sealing area in the closed position. A pressure-compensation device is provided for when the backflow preventing check valve is closed and a volume of fluid is sealed off on the outflow side. In order to counteract an undesireable high pressure load when the check valve is closed, the outflow area defined by the closing body (3) in a closed position is joined to at least one pressure compensation chamber (6) whose receiving volume corresponds approximately to the expansion volume of the sealed-off fluid and which is disposed outside the area which is defined on the outflow side.Type: GrantFiled: September 9, 2003Date of Patent: August 24, 2004Assignee: Dieter Wildfang GmbHInventors: Christoph Weis, Martin Fangmeier
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Patent number: 6695011Abstract: A flow regulator (1) having a regulator housing (2) in which, in a flow channel, an annular flow restrictor (5) made of elastic material is provided that is pushed onto a fastening post (4) and encircles this post. The post (4) has at least two fastening webs (6), oriented opposite a direction in which the elastic material is pushed on, whose free ends engage the flow restrictor (5) from behind in a securing manner. The flow restrictor (5) limits, between itself and at least one fixed part of the housing, a control gap whose flow cross-section can be modified by the flow restrictor (5), which deforms under the pressure difference that arises during flow. In the flow regulator according to the present invention the fastening webs (6) are fashioned as resilient webs that can be flexibly inwardly deflected. The flow regulator (1) according to the present invention can be manufactured economically and with a low cost, and is distinguished by its high degree of functional reliability.Type: GrantFiled: March 4, 2003Date of Patent: February 24, 2004Assignee: Dieter Wildfang GmbHInventor: Michael Sochtig
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Publication number: 20030209278Abstract: A flow regulator (1) having a regulator housing (2) in which, in a flow channel, an annular flow restrictor (5) made of elastic material is provided that is pushed onto a fastening post (4) and encircles this post. The post (4) has at least two fastening webs (6), oriented opposite a direction in which the elastic material is pushed on, whose free ends engage the flow restrictor (5) from behind in a securing manner. The flow restrictor (5) limits, between itself and at least one fixed part of the housing, a control gap whose flow cross-section can be modified by the flow restrictor (5), which deforms under the pressure difference that arises during flow. In the flow regulator according to the present invention the fastening webs (6) are fashioned as resilient webs that can be flexibly inwardly deflected. The flow regulator (1) according to the present invention can be manufactured economically and with a low cost, and is distinguished by its high degree of functional reliability.Type: ApplicationFiled: March 4, 2003Publication date: November 13, 2003Applicant: Dieter Wildfang GmbHInventor: Michael Sochtig
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Patent number: 6571831Abstract: A flow regulator (1) having a regulator housing (2) with a control peg (4) in a passage channel that encompasses an annular flow restrictor (5) made of elastic material. The flow restrictor defines a control gap (6) located between itself and at least one part that is fixed to the housing. The passage cross-section of the gap can be modified by deformation of the flow restrictor resulting from the difference in pressure during cross flow. Spaced recesses (7, 8) oriented in the flow direction are provided in a peripheral direction on the surfaces of the part fixed to the housing defining the control gap (6). The regulation recesses are on the inner surface of the regulator housing (2) and on the peripheral surface of the control peg. The desired flow rate is achieved at comparatively low liquid pressure and remains practically constant in case of increased or fluctuating liquid pressures.Type: GrantFiled: January 11, 2002Date of Patent: June 3, 2003Assignee: Dieter Wildfang GmbHInventor: Keith Hart
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Patent number: 6152182Abstract: A flow regulator (1) is provided having a flow dispersion device (5) after which in the flow direction (Pfi) a flow regulation device (8) is connected. This flow regulation device (8) has several deflectors arranged in the flow path crosswise to the flow direction (Pf1). For the flow regulator (1) according to the invention it is characteristic, that the deflectors (9) are constructed in a pin or ring shape and set apart at a distance from each other, are connected with at least one mounting part (3, 4) as a single piece, that the at least one mounting part (3, 4) is constructed as an injection molded plastic part with its molded-on deflectors (9) as a single piece, and that the at least one mounting part (3, 4) can be inserted into a flow regulator housing or is constructed as a flow regulator housing (2).Type: GrantFiled: April 12, 1999Date of Patent: November 28, 2000Assignee: Dieter Wildfang GmbHInventors: Hermann Grether, Christoph Weis
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Patent number: 6126093Abstract: The invention involves a flow regulator (80) with a flow dispersion device (9) as well as with a flow regulation device (1) that forms the face of the flow regulator (80) which is connected downstream in the flow direction and has several flow-through holes (3). For the flow regulator according to the invention it is characteristic that the flow regulation device (1) has a perforated plate (2) on the outlet side, that has, in at least a partial area constructed as the perforated field of its planar surface that is oriented transversely to the flow direction, several flow-through holes (3) whose guide walls (4) that separate adjacent flow-through holes from each other and extend in approximately the flow direction. Each guide all has a wall thickness that amounts to a fraction of the internal hole diameter of a flow-through hole (3) limited by the guide walls (4), and that the ratio h to D between the height (h) of the guide walls and the overall diameter (D) of the flow regulation device is smaller than 1.Type: GrantFiled: April 12, 1999Date of Patent: October 3, 2000Assignee: Dieter Wildfang GmbHInventors: Hermann Grether, Christopher Weis
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Patent number: 5769326Abstract: This assembly is compact and includes filtering, flow-controlling and aerator elements held together with snap-fastener-type connectors.Type: GrantFiled: March 25, 1996Date of Patent: June 23, 1998Assignee: Dieter Wildfang GMBHInventors: Claus Muchenberger, Hermann Grether
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Patent number: 5743291Abstract: The invention relates to a sanitary safety device which is interposed in a water-supply line and there is insertable in an opening in the region of a coupling point or joint. It is characteristic of the sanitary safety device according to the invention that the sanitary safety device has a flow regulator (2) or similar restrictor as well as a backflow preventer (3), these being combined in the sanitary safety device to compose a constructional unit in the form of a cartridge (1). Such is insertable for example, in the opening of a recess in the form of a cartridge mount provided in a hose connector. The cartridge (1) composed of the flow regulator (2), backflow preventer (3) and any strainer attachment (8) at the inflow end can thus be interposed in a water-supply line in a simple fashion and with little effort.Type: GrantFiled: January 27, 1997Date of Patent: April 28, 1998Assignee: Dieter Wildfang GmbHInventors: Holger Nehm, Christoph Weis
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Patent number: 5643521Abstract: A fitting (1) designed for example as a non-return valve (2) has an outer housing (3) having an inner lip seal (7) interacting with a closing element (5), and also an outer annular seal (8). Both the outer housing (3) and the seals (7, 8) are designed as injection moldings. The production of the outer housing with the seals takes place in an injection molding process in which, first of all, the outer housing and, in a second operation, the seals are injection molded appropriate, more than two operations, in particular in the case of more than two injection molding material components, can also be provided. By means of the injection molded seals, the latter are durably and closely bonded to the outer housing (3) resulting in simplifications regarding production technology and design (FIG. 1).Type: GrantFiled: December 18, 1995Date of Patent: July 1, 1997Assignee: Dieter Wildfang GmbHInventor: Holger Nehm
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Patent number: 5500115Abstract: A strainer for water outlet fittings which has multiple strainer apertures, which possess approximately equal open hexagonal aperture cross sections. The opposite surfaces of common side walls are approximately parallel to each other. The strainer is characterized by comparatively low noise, high throughput and at the same time good straining and cleaning action.Type: GrantFiled: September 29, 1994Date of Patent: March 19, 1996Assignee: Dieter Wildfang GmbHInventors: Holger Nehm, Hermann Grether
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Patent number: 5495985Abstract: Jet regulator and aerator for attachment to a faucet contains a circular perforated plate for producing individual jets, and a coaxial sleeve downstream. The sleeve supports--deflection slopes which are inclined at an angle to the flow direction. The deflection slopes may be in the form of conical-pointed pins aimed at the plate. The pins are mounted on a tiered-wedding-cake shaped wall. An axial cone in the sleeve may also comprise a deflection slope. Additional obstacles consist of pins and/or ribs located at intervals from each other.Type: GrantFiled: September 30, 1994Date of Patent: March 5, 1996Assignee: Dieter Wildfang GmbHInventors: Holger Nehm, Hermann Grether
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Patent number: 5370150Abstract: A fitting (1) designed for example as a non-return valve (2) has an outer housing (3) having an inner lip seal (7) interacting with a closing element (5), and also an outer annular seal (8). Both the outer housing (3) and the seals (7, 8) are designed as injection moldings. The production of the outer housing with the seals takes place in an injection molding process in which, first of all, the outer housing and, in a second operation, the seals are injection molded. If appropriate, more than two operations, in particular in the case of more than two injection molding material components, can also be provided. By means of the injection molded seals, the latter are durably and closely bonded to the outer housing (3) resulting in simplifications regarding production technology and design (FIG. 1).Type: GrantFiled: August 17, 1993Date of Patent: December 6, 1994Assignee: Dieter Wildfang GmbHInventor: Holger Nehm
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Patent number: 5195552Abstract: A check valve wherein the housing has an inlet and a seat at one end and an outlet at the other end. The other end can receive a removable and reinsertable cage which serves to confine a selected one of several spherical and/or otherwise configurated valving elements to movements between a sealing position of engagement with the seat to seal the inlet from the outlet and an inoperative position in which the housing, the selected valving element and the cage define a path for the flow of a fluid from the inlet toward, through and beyond the outlet. The inserted valving element is biased against the seat by a spring or by the fluid when the pressure of fluid at the outlet exceeds the pressure of fluid at the inlet.Type: GrantFiled: October 31, 1991Date of Patent: March 23, 1993Assignee: Dieter Wildfang GmbHInventor: Holger Nehm