Source: https://patents.google.com/patent/US6131880?oq=5251294
Timestamp: 2018-03-24 05:21:42
Document Index: 801186329

Matched Legal Cases: ['art 3', 'art 3', 'art 3', 'art 3', 'art 3', 'art.\n3']

US6131880A - Microvalve and method for manufacturing a microvalve - Google Patents
Microvalve and method for manufacturing a microvalve Download PDF
US6131880A
US6131880A US09277299 US27729999A US6131880A US 6131880 A US6131880 A US 6131880A US 09277299 US09277299 US 09277299 US 27729999 A US27729999 A US 27729999A US 6131880 A US6131880 A US 6131880A
US09277299
Thomas Schittny
Alexandra Jauernig
F02M2200/9092—Sintered materials
Actuating part 3 is directly coupled to housing 12, since web- and plate-like spring elements 24 are provided between an annular inner wall 22 of housing 12 extending between pot magnet 5 and base plate 15, and armature 18. The three spring elements 24, e.g., disposed at 120° intervals from one another and running radially through open area 14 have, for example, a thickness of 0.1 mm and a width of 0.5 mm. The length of spring elements 24 is automatically given by the dimensions of armature 18 and inner wall 22. Stop knobs 27, which hit against pot magnet 5 when microvalve 1 is open, are formed on one top front end 25 of armature 18 facing pot magnet 5. Three or four of these stop knobs 27, for example, are expediently provided on armature 18. A sealing ring (gasket) 28, which projects out from a bottom end face 29 of disk-shaped valve-closure element 20 and represents the actual valve-closure element, runs on valve-closure element 20 and points toward base plate 15. Sealing ring 28 is formed as a circumferential, annular elevation of valve-closure element 20 that is small in width. A top end face 30 of base plate 15 represents a valve-seat surface area, at least in the area of sealing ring 28 of valve-closure element 20 that corresponds to base plate 15.
The fluid to be controlled (or switched) e.g., a fuel such as gasoline, is forced via one or more, e.g., radially running channels 32 in inner wall 22, which serve as an inlet for a fluid, in accordance with the indicated arrow direction, into the high-pressure section, i.e., into open area 14 of microvalve 1. If the valve is actuated, then the electromagnetic drive 2 exerts an attractive force on actuating part 3. Sealing ring 28 is lifted up from valve-seat surface area 30, and microvalve 1 releases a fluid flow to outlet orifice 16 of microvalve 1. Armature 18 then strikes with its stop knobs 27 against pot magnet 5. The lift of actuating part 3 is given by the height of open area 14 and of stop knobs 27, which, therefore, delimit the lift. Moreover, stop knobs 27 prevent armature 18 from adhering to pot magnet 5. After pot magnet 5 has been interrupted, armature 18, together with valve-closure element 20, is moved by the fluid in open area 14 and spring elements 24 in the direction of valve-seat surface area 30, and microvalve 1 is closed. Thus, the path between the two described end positions of actuating part 3 represents the lift. The opening and closing travel of actuating part 3 is marked by an axially running double arrow. The closing force acting on armature 18 is the spring resilience of spring elements 24 plus a hydraulic force F, which is equal to the pressure difference .increment.p between open area 14 and the valve outlet, multiplied by the surface A of the valve outlet (F=.increment.p×nr2). The entire microvalve 1 has, e.g., an axial extent of 10 to 15 mm and is, therefore, very compact and requires only a very small installation space. When microvalve 1 is presently used, e.g., as a fuel injector on internal combustion engines, compared to conventional injectors presently used, the result is an installation space that is reduced several times over to about 1/3 to 1/10.
1. Lamination application of a non-removable resist at, e.g., about 100° C.;
1. A method for manufacturing a microvalve including a plurality of at least partially bonded, stacked layers, at least one of the plurality of layers being at least partially made of a metallic material, the method comprising the steps of:
(a) providing an electromagnetic drive; and
(b) forming a multilayer lower valve part from the plurality of stacked layers using an electrodeposition process, the multilayer lower valve part being separate from the electromagnetic drive, the multilayer lower valve part including at least one armature, a valve-closure element, a valve-seat surface, at least one inlet and at least one outlet, the valve-seat surface communicating with the valve-closure element, the valve-seat surface being positioned between the at least one inlet and the at least one outlet, the valve-closure element being deflectable using the electromagnetic drive.
2. A method for manufacturing a microvalve including a plurality of at least partially bonded, stacked layers, at least one of the plurality of layers being at least partially made of a metallic material, the method comprising the steps of:
(a) providing an electromagnetic drive;
(b) forming the plurality of stacked layers, separate from the electromagnetic drive, using an electrodeposition process to form a multilayer lower valve part, the multilayer lower valve part including at least one armature, a valve-closure element, a valve-seat surface, at least one inlet and at least one outlet, the valve-seat surface communicating with the valve-closure element, the valve-seat surface being positioned between the at least one inlet and the at least one outlet, the valve-closure element being deflectable using the electromagnetic drive;
(c) before steps (a) and (b), applying a sacrificial layer to a substrate of the multilayer lower valve part;
(d) applying a photoresist layer over at least one of the substrate and the sacrificial layer;
(e) selectively patterning the photoresist layer to form a negative pattern for a later layer of the multilayer lower valve part in the photoresist;
(f) forming resist trenches in the negative pattern of the photoresist using a micro-electrodeposition process, the resist trenches being galvanically filled with a metal composition material;
(g) repeating steps (c) through (f) for forming a desired number of the plurality of layers of the microvalve; and
(h) after step (g), dicing the microvalve and dissolving the photoresist out of the multilayer lower valve part.
3. The method according claim 2, further comprising the step of:
(i) applying galvanic starting layers between the plurality of layers.
4. The method according to claim 2, wherein, in step (d), the photoresist is applied by laminating a non-removable resist.
10. The method according to claim 2, wherein, after step (g), two layers of the microvalve are formed using the electrodeposition process, and further comprising the step of:
(k) horizontally and vertically extending the metal composition material over the photoresist.
US09277299 1995-06-30 1999-03-26 Microvalve and method for manufacturing a microvalve Expired - Fee Related US6131880A (en)
DE9523915 1995-06-30
DE1995123915 DE19523915A1 (en) 1995-06-30 1995-06-30 Microvalve and methods of making a microvalve
US08793427 US5924674A (en) 1995-06-30 1996-05-30 Microvalve and method for manufacturing a microvalve
US09277299 US6131880A (en) 1995-06-30 1999-03-26 Microvalve and method for manufacturing a microvalve
US08793427 Division US5924674A (en) 1995-06-30 1996-05-30 Microvalve and method for manufacturing a microvalve
US6131880A true US6131880A (en) 2000-10-17
ID=7765720
US08793427 Expired - Fee Related US5924674A (en) 1995-06-30 1996-05-30 Microvalve and method for manufacturing a microvalve
US09277299 Expired - Fee Related US6131880A (en) 1995-06-30 1999-03-26 Microvalve and method for manufacturing a microvalve
US (2) US5924674A (en)
EP (1) EP0778924B1 (en)
JP (1) JPH10505403A (en)
KR (1) KR100409145B1 (en)
CN (1) CN1135307C (en)
DE (2) DE19523915A1 (en)
WO (1) WO1997002433A1 (en)
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EP0778924A1 (en) 1997-06-18 application
DE59610001D1 (en) 2003-01-30 grant
JPH10505403A (en) 1998-05-26 application
CN1135307C (en) 2004-01-21 grant
WO1997002433A1 (en) 1997-01-23 application
US5924674A (en) 1999-07-20 grant
DE19523915A1 (en) 1997-01-02 application
EP0778924B1 (en) 2002-12-18 grant
KR100409145B1 (en) 2004-03-26 grant
CN1157030A (en) 1997-08-13 application
US6173914B1 (en) 2001-01-16 Valve and method for producing a valve seat for a valve