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US 9,010,372 B2Granted
Changeover valve
AssigneeNeoperl GmbH
InventorMartin Fangmeier
Life of this patent
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AssigneeNeoperl GmbH
InventorMartin Fangmeier
Estimating the term…
A changeover valve (1) including a valve housing (2), which has at least one inlet opening (3) and at least three outlet openings (4, 5, 6), of which outlet openings (4, 5, 6), by a changeover shaft (7) displaceably guided in the valve housing (2), one outlet opening can optionally respectively be assigned to the at least one inlet opening (3), two sealing elements (8, 9), which (8, 9) are displaceably guided on the changeover shaft (7) between two drivers (10, 11) and are kept at a distance from each other with the aid of at least one pressure element (12), a switching tube (13), which is displaceably guided in the valve housing (2) via two circumferential annular guide surfaces (14, 15) provided on the tube circumference thereof, and at least one switching tube opening (16) provided between the annular guide surfaces (14, 15). An axial actuating movement of the changeover shaft (7) can be transferred at least to one of the two sealing elements (8, 9) in such a way that either both sealing elements (8, 9) bear with outer circumferential sealing surfaces (18, 19) on the sealing surfaces (22, 23) of the valve housing (2) that surround a fluid passage (20, 21) and one of the sealing elements (8, 9) closes the adjacent circumferential front edge of the switching tube (13) with an inner circumferential sealing surface (24, 25) while the other sealing element (9, 8) remains at a distance from the other circumferential front edge of the switching tube (13), serving as a fluid passage, or both inner circumferential sealing surfaces (24, 25) of the sealing elements (8, 9) bear on the adjacent circumferential front edges of the switching tube (13) while the one sealing element (8, 9) uses the outer circumferential sealing surface (18, 19) thereof to load the adjacent mating sealing surface (22, 23) surrounding the fluid passage, and the other sealing element (9, 8) is spaced apart from the mating sealing surface (25, 24) assigned thereto and surrounding a fluid passage (21, 20).
A changeover valve (1) comprising a valve housing (2) which has at least one inlet orifice (3, 3′) and at least three outlet orifices (4, 5, 6), of which (4, 5, 6) in each case one of the outlet orifices can be selectively assigned to the at least one inlet orifice (3, 3′) by a changeover shaft (7) guided displaceably in the valve housing (2), two sealing elements (8, 9) are guided displaceably on the changeover shaft (7) between two drivers (10, 11) and are held spaced apart from one another by at least one thrust element (12), a switching tube (13) guided displaceably in the valve housing (2) by two encircling guide ring surfaces (14, 15) provided on a tube circumference thereof and the switching tube has at least one radial switching tube orifice (16) provided between the guide ring surfaces (14, 15), an axial setting movement of the changeover shaft (7) is transmitted at least to one of the two sealing elements (8, 9) such that either both of the sealing elements (8, 9) bear with outer encircling sealing surfaces (18, 19) thereof against counterpart sealing surfaces (22, 23), which border a fluid passage (20, 21), of the valve housing (2) and one of the sealing elements (8, 9) includes an inner encircling sealing surface (24, 25) that closes off an adjacent circumferential face edge of the switching tube (13) while the other sealing element (9, 8) remains spaced apart from the other circumferential face edge, which serves as a fluid passage, of the switching tube (13), or both inner encircling sealing surfaces (24, 25) of the sealing elements (8, 9) bear against the adjacent circumferential edges of the switching tube (13) while one of the sealing element (8, 9), by said outer encircling sealing surface (18, 19) thereof, acts on an adjacent one of the counterpart sealing surfaces (22, 23) which borders the fluid passage and the other sealing element (9, 8) is spaced apart from the counterpart sealing surface (25, 24) which is assigned thereto and which borders the fluid passage (21, 20).
Dependencies are inferred from the claim text.