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US 2003/0111800 A1Published application
Rotary shaft seal with two sealing lips
AssigneeVR Dichtungen GmbH
InventorSiegmar Kreutzer
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AssigneeVR Dichtungen GmbH
InventorSiegmar Kreutzer
Estimating the term…
In a known rotary shaft seal with two sealing lips, a first diaphragm body (20) with a first sealing lip (21) is mounted on a support element (22) and inserted in a second diaphragm body (23) with a second sealing lip (27) that rests against a pressure mount (24) and is mounted in the bearing mount (1). The object of the invention is to prevent the pressure medium from passing through the gap (26) between the two diaphragm bodies, which is open towards the pressure side, and ensure that the first diaphragm body can be displaced in the second along this gap. According to the invention, the first diaphragm body (2) is mounted on a support element (3) and inserted from the unpressurised side into the second diaphragm body (4), which serves to mount the seal in the bearing mount (1), reaches around a pressure mount (5) on the unpressurised side and secures it against axial movement. The rotary shaft seal according to the invention can be used to seal shaft openings leading into vessels containing a pressurised fluid medium, particularly water pumps for internal combustion engines in motor vehicles.
Rotary shaft seal with a first diaphragm body (2), which has a first sealing diaphragm (6) with a first sealing lip (7) that is in tight contact with a shaft (12) and inclined against the pressure direction, and which is mounted on a support element (3) and supported on the unpressurised side by a pressure mount (5), and a second diaphragm body (4), which has a second sealing diaphragm (8) that is located at a distance from the first sealing diaphragm (6) in the pressure direction and has a second sealing lip (9) resting against the shaft and inclined against the pressure direction, and into which are inserted the support element (3) with the first diaphragm body (2), as well as the pressure mount (5) on the unpressurised side, where the support element (3) supports the second sealing diaphragm (8) and the pressure mount is held in place axially between the first diaphragm body (2) and the inward-facing encompassing edge (10) of the second diaphragm body (4).
Dependencies are inferred from the claim text.