Firma Carl Freudenberg

Stefan Burger

Hans-Gerd Eckel

Horst Kober

Berthold Lannert

Joachim Heinemann

Ulrich Freudenberg

Tillman Freudenberg

Reinhard Tinz

Uwe Weltin

Georg Feurer

Rainer Franz

Harald Buchalla

A sealing arrangement including a sealing ring with a support ring extending substantially in a radial direction. The support ring is joined in the radial direction to a first sealing element that lies in contact with and is nonrotatable with respect to a first machine element to form a static seal. The support ring is also joined in the radial direction to a second sealing element that is placed against a second machine element rotatably with respect to the second machine element to create a dynamic seal. The first and second sealing elements are each made of an elastomeric material, and the sealing ring has, in order to sense rotational movements of the first machine element about its axis, at least one auxiliary device that can move past a rotational speed sensor. The auxiliary device can be a multipole ring made of a pasty, hardenable, and magnetizable material that is arranged as a intermediate layer of film-like thinness on the side of the support ring facing the rotational speed sensor. The multipole ring has north and south poles alternating in the circumferential direction and extending in the radial direction, and the multipole ring is completely covered by the elastomeric material of the first and/or second sealing elements.

Sealing arrangement

A sealing arrangement which includes a sealing ring with a support ring extending substantially in the radial direction and is joined in the radial direction on one end to a first sealing element that lies in sealing contact with a first machine element nonrotatably with respect thereto and in a statically sealing manner, and is joined in the radial direction on another end to a second sealing element that is placed against a second machine element rotatably with respect thereto and in a dynamically sealing manner. The first and second sealing elements are each made of an elastomeric material, and the sealing ring has, in order to sense rotational movements of the first machine element about its axis, at least one auxiliary device that can move past a rotational speed sensor. The auxiliary device may be a multipole ring, rotatable together with the first machine element about its axis, that is made of a magnetizable material. The multipole ring may have north and south poles alternating in the circumferential direction and extending in the radial direction.

A method for manufacturing a sealing ring. A support ring is provided, and at least one pasty, magnetizable material is applied onto a side of said support ring. The material is then hardened. First and second elastomeric sealing elements are vulcanized to the support ring, such that the ring is covered by the elastomeric material of said first sealing element. The magnetizable material is then magnetized. The magnetizable material may be a paste with at least two homogeneously distributed magnetic materials. At least two magnetic materials may be applied in succession onto said support ring; in that method, the second magnetic material is not applied until after a step of hardening the first magnetic material. After said step of hardening, the support ring may be deformed and punched out.

Method of making a sealing arrangement

A sealing arrangement including a sealing ring with a support ring extending substantially in a radial direction. The support ring is joined in the radial direction to a first sealing element that lies in contact with and is nonrotatable with respect to a first machine element to form a static seal. The support ring is also joined in the radial direction to a second sealing element that is placed against a second machine element rotatably with respect to the second machine element to create a dynamic seal. The first and second sealing elements are each made of an elastomeric material, and at least one multipole ring that can move past a rotational speed sensor. The multipole ring is made of a pasty, hardenable, and magnetizable material that is arranged as a intermediate layer of film-like thinness on the side of the support ring facing the rotational speed sensor. The multipole ring has north and south poles alternating in the circumferential direction and extending in the radial direction, and the multipole ring is completely covered by the elastomeric material of the first and/or second sealing elements.

Sealing arrangement having multiple ring completely covered by

A hydraulically damped rubber bearing, that supports a vibrating mechanical subassembly on a substructure, has an actuator with an electromagnetic drive mechanism associated with a fluid filled chamber. The drive mechanism is responsive to performance characteristic controls which are electrically connected to at least one signal emitter in the subassembly and have a final stage in the front of a power amplifier.

Hydraulically damped rubber bearing that supports a mechanical

A line (3) provided between the head space (11) of the fuel tank (10) and the induction tube (1) of the engine contains an absorption element (9) and can be shut off by a signal-actuated servo valve (8) connected to the outlet from the absorption element. The line (3) is provided with a first sensor (4) preceding the absorption element (9) and detecting gas flows. A vacuum actuator (12) following the servo valve (8) is provided with a second sensor (13) which gives a signal when actuated. The first sensor (4) and the second sensor (13) are connected for carrying signals to a diagnosis block (14) which compares them with the signal (17) actuating the servo valve (8) and uses them for fault diagnosis.

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Weinheim, Germany

Stefan Burger