Abstract:
The disclosure relates to a seal set, and to a sealing arrangement comprising a seal set. The seal set is arranged for sealing a primary side against a secondary side and comprises a main body which is arranged to be received at a support part, and a slide ring for contacting a slide surface of a slide partner part, wherein the main body is arranged in an annular fashion and comprises a radial circumferential receiving groove for the slide ring, wherein further a radial circumferential sealing lip is provided at the main body, which is formed between the receiving groove for the slide ring and a secondary-side end of the main body, wherein the sealing lip comprises a tip region and a conical ring surface adjoining the tip region, and wherein the slide ring, in a mounted state, at least sectionally covers the receiving groove, a primary-side adjoining surface adjoining the receiving groove, and the conical ring surface.
Abstract:
The disclosure relates to a wiper unit and to a hydraulic working apparatus comprising a wiper unit. The wiper unit comprises a retaining ring, which is arranged in a basically rotationally symmetric fashion about a longitudinal axis and which comprises a contact portion for being received at a housing part, a primary wiper and a secondary wiper, which is axially spaced away from the primary wiper towards the secondary side, wherein a primary lip is formed at the primary wiper and a secondary lip is formed at the secondary wiper, wherein the primary lip and the secondary lip, in a mounted state, contact a sliding surface of a guided slide partner part in a sealing fashion, wherein the primary lip protrudes towards the primary side in a collar-like fashion and wherein the primary lip, at the side thereof facing away from the guided slide partner part in the mounted state, is at least sectionally conically tapered towards the primary side, and wherein the primary lip comprises a contact surface arranged for abutting the sliding surface.
Abstract:
The disclosure relates to a seal set, and to a sealing arrangement comprising a seal set. The seal set is arranged for sealing a primary side against a secondary side and comprises a main body which is arranged to be received at a support part, and a slide ring for contacting a slide surface of a slide partner part, wherein the main body is arranged in an annular fashion and comprises a radial circumferential receiving groove for the slide ring, wherein further a radial circumferential sealing lip is provided at the main body, which is formed between the receiving groove for the slide ring and a secondary-side end of the main body, wherein the sealing lip comprises a tip region and a conical ring surface adjoining the tip region, and wherein the slide ring, in a mounted state, at least sectionally covers the receiving groove, a primary-side adjoining surface adjoining the receiving groove, and the conical ring surface.
Abstract:
An improved coupling device for connecting a towing vehicle to a semi-trailer and including a kingpin for attachment to a trailer and a tractor coupling plate for attachment to a towing vehicle, the tractor coupling plate having locking elements for positive and rotatable grasping of substantially rotationally symmetrical surfaces of the kingpin. The kingpin surfaces are formed by the outer surfaces of a thermally coated sleeve disposed about a kingpin stud and rotatable thereon. A method for corresponding modification of used coupling devices is also disclosed.
Abstract:
A trailer coupling is provided with a sliding plate and a coupling plate having an anti-friction layer, preferably of a PTFE composite material. To make it possible that in operation the anti-friction surface always remains paired with the same counter surface so that they may matingly wear with each other, a steel plate is placed onto the king journal of the tractor covering the slide plate itself. The steel plate is finished to a depth of roughness of 1 .mu.m. The bore of the steel plate permits passage of the king journal without additional clearance, so that the steel plate is maintained in position by tilting and no further connection is necessary between the steel plate and the slide plate.
Abstract:
A guide ring having a seating surface of `U`-shaped cross-section. A plurality of the guide rings may be carried by a piston, piston rod or the like in abutting relation to provide a continuous imperforate surface, or axially spaced from one another with a sealing member interposed between adjacent rings, the sealing member being biased into its operative position by fluid pressure. A ring of resilient material is positioned radially inwardly of the rings and sealing member and is provided with chamfered surfaces which are acted on by biasing means. A sealing arrangement is also provided comprising ring seals and/or stripper rings disposed in a groove in a piston or piston rod and formed of soft material with a lip seal in contact with a surface to be sealed. A shaped sliding ring of abrasion-resistant material which bears on the surface to be sealed is disposed in the ring seal and/or stripper ring.
Abstract:
A packing arrangement for a floating piston dividing a cylinder into first and second chambers comprising a circumferential groove formed in the sliding surface of the floating piston; a circumferential elevation dividing the bottom of the groove into first and second spaces situated on either side of the elevation; backing material placed in the groove; a sealing ring radially situated upon the backing material; first and second extensions on the backing material projecting into the first and second spaces, respectively; each extension having first and second lips forming an annular space between the bottom of the groove and the internal surface of the backing material; the first lip of each extension abutting a lateral wall of the groove and the second lip of each extension abutting a lateral surface of the elevation; a first pressure channel connecting the first chamber with the annular space formed by the first extension; and a second pressure channel connecting the second chamber with the annular space formed by the second extension.
Abstract:
A hydraulically-operated support device for semitrailers is disclosed comprising a hydraulic cylinder semitrailer support and a pump subassembly having three independently operable pumps for generating and controlling the hydraulic operating pressure. The hydraulic cylinder semitrailer support has an extending piston in an extending cylinder, in the bottom end of which is formed a load-raising cylinder for a load raising-piston. A first annular space is formed between the extending piston and the extending cylinder and a second annular space is formed between the load-raising piston and the load-raising cylinder. The annular spaces allow application of pressure in the retraction direction. The pump subassembly comprises an extending pump acting on the extending piston, a load-raising pump acting on the load-raising piston and a retracting pump acting on the annular spaces. The transmission ratio between the load-raising pump and the load-raising piston is substantially lower than the transmission ratio between the extending pump and the extending piston.
Abstract:
A wiper unit includes a retaining ring, which is arranged in a rotationally symmetric fashion about a longitudinal axis and which includes a contact portion for being received at a housing part, a primary wiper and a secondary wiper, which is axially spaced away from the primary wiper towards the secondary side. A primary lip is formed at the primary wiper and a secondary lip is formed at the secondary wiper. The primary lip and the secondary lip, in a mounted state, contact a sliding surface of a guided slide partner part in a sealing fashion, wherein the primary lip protrudes towards the primary side in a collar-like fashion and wherein the primary lip, at the side thereof facing away from the guided slide partner part, is at least sectionally conically tapered towards the primary side, wherein the primary lip comprises a contact surface arranged for abutting the sliding surface.