Patents Assigned to Lisega GmbH
  • Patent number: 7021855
    Abstract: In order to also be able to use a clamping device with structural components and girders with different dimensions or inclinations, a clamping device is proposed that comprises a tension element, to which a force can be applied, and a bearing element, which interacts with the tension element and is provided with a bearing surface that can rest against a girder or structural component. In order to ensure parallel contact of the bearing surface of the bearing element on a flange of the girder or a bearing surface of the structural component, the clamping device according to the invention further has means for coupling or connecting the tension element to the bearing element, which under the influence of the tension force or clamping force, enables the independent rotation and/or inclination of the bearing element relative to the tension element under the influence of the applied tension force, until the bearing surface of the bearing element is essentially parallel to the girder or structural component.
    Type: Grant
    Filed: April 12, 2002
    Date of Patent: April 4, 2006
    Assignee: Lisega GmbH
    Inventors: Hans-Herlof Hardtke, Jorg Bernert
  • Patent number: 5558447
    Abstract: In order to simplify the manufacture of a roller bearing (1) in which a cylindrical roller (14) is mounted on a central shaft (3) which extends out beyond the ends of the roller (14) and whose ends (4, 5) are fitted in a mounting (8), the invention proposes that at least the ends of the shaft (3 ) are hollow and that at least part of the wall (11) of the cavity thus formed is secured in position against the outer surface (12) of the mounting (8) by bending it round or beading it over. This avoids the need for a split-pin to secure the shaft (3).
    Type: Grant
    Filed: December 8, 1994
    Date of Patent: September 24, 1996
    Assignee: LISEGA GmbH
    Inventor: Hans Hardtke
  • Patent number: 5104079
    Abstract: In a supporting clamp for mounting constructional components, in particular pipe conduits, a fixing means is formed by a bar extending transversal to the beam and being arranged at the lower surface of the beam flange. On both sides of the beam flanges (2a) of the beam (2) longitudinally extending supporting sheet members (3,4) are arranged suspended on rounded bearing bars (5,6). The supporting sheet members (3,4) have longitudinal slots (9, 10). A web plate (8) is arranged in these slots which is secured against vertical displacement.
    Type: Grant
    Filed: October 24, 1990
    Date of Patent: April 14, 1992
    Assignee: Lisega GmbH
    Inventor: Hans H. Hardtke
  • Patent number: 5083730
    Abstract: The transverse for support structures in industrial use, e.g. for receiving constructional components such as pipe conduits and the like, consists of two upright U-shaped iron members (2,3) having their flanges averted from each other. The U-shaped iron members (2,3) are connected by at least one connecting member. The connecting member for the U-shaped iron members (2,3) consists of a web plate (4) provided transversely to the longitudinal extension of the U-shaped iron members (2,3) and between the U-shaped iron members. The web plate (4) and the U-shaped iron members (2,3) are held together by a plug connection (8,9,11,12).
    Type: Grant
    Filed: October 24, 1990
    Date of Patent: January 28, 1992
    Assignee: Lisega GmbH
    Inventor: Gerhard Liesegang
  • Patent number: 5028019
    Abstract: A pipe support is provided which includes a bearing support defined by a base plate and two upwardly converging legs carrying pins which journal first anti-friction bearings between the legs and second anti-friction bearings outside the legs. A pipe is carried by a pipe support plate supported atop the first anti-friction bearings. The pipe support has ends carrying depending side plates which in turn include projections underlying the second anti-friction bearings which collectively provide free displacement longitudinally of the pipe axis and limited upward movement of the pipe support plate from atop the first bearings.
    Type: Grant
    Filed: March 26, 1990
    Date of Patent: July 2, 1991
    Assignee: LISEGA GmbH
    Inventor: Hans H. Hardtke
  • Patent number: 5028149
    Abstract: A roller bearing for supporting pipes subject to thermal expansion which includes a mounting defined by a base plate having opposite side walls bent into generally converging relationship to each other in a direction away from the base plate, a pillow block supported from the base plate, a roller between each side wall and the pillow block, a bearing pin rotatably supporting each roller, and each bearing pin being in spanning relationship between the pillow block and an associated one of the side walls.
    Type: Grant
    Filed: March 9, 1990
    Date of Patent: July 2, 1991
    Assignee: LISEGA GmbH
    Inventor: Hans H. Hardtke
  • Patent number: 5018700
    Abstract: A suspension system for supporting pipes under generally constant tension comprises a main spring system including a main spring located between a suspension portion and a load-bearing portion for applying spring-biasing forces to the suspension portion. An additional spring system includes an additional spring which compensates for variations in the spring-biasing forces of the main spring through associated cam and cam followers. An auxiliary hydraulically operated mechanism is provided for applying a supplementary predetermined biasing force to increase or decrease the biasing forces of the main springs in response to detected value/parameters.
    Type: Grant
    Filed: May 15, 1989
    Date of Patent: May 28, 1991
    Assignee: Lisega GmbH
    Inventor: Hans-Herlof Hardtke
  • Patent number: 5018607
    Abstract: A hydraulic dashpot for supporting pipes or similar loads comprises a cylinder having a piston mounted for displacement therein, the piston setting-off the cylinder chambers which are in fluid communication with a fluid storage chamber, and the piston having an inner chamber housing a valve seat body of a main control valve. The main control valve includes a pair of piston-type valve members reciprocally carried by the valve seat body and biased by a spring. The inner chamber and valve seat body have opposing peripheral surfaces and one of these surfaces is provided with a groove running the length thereof and at each end being merged with axial grooves which places the axial opposite ends of the inner chamber in fluid communication with each other to prevent blockage/locking-up during dashpot operation.
    Type: Grant
    Filed: May 15, 1989
    Date of Patent: May 28, 1991
    Assignee: Lisega GmbH
    Inventors: Hans-Herlof Hardtke, Jorg Bernert
  • Patent number: 4951902
    Abstract: A support bracket for pipes comprising a base of a generally U-shaped configuration defined by a base plate portion and a pair of spaced upstanding generally parallel leg portions. The leg portions each have a pair of shoulders spaced by a slot and each shoulder has an edge curved to mate with an outer convex surface of an associated pipe saddle. Each pipe saddle is in turn opposed by a pipe clip for fastening an associated pipe to the support bracket.
    Type: Grant
    Filed: May 15, 1989
    Date of Patent: August 28, 1990
    Assignee: Lisega GmbH
    Inventor: Hans H. Hardtke
  • Patent number: 4946117
    Abstract: A clip for supporting pipes or the like in a generally upright orientation comprising a pair of generally transversely spaced longitudinal plates each having opposite ends, a pair of generally longitudinally spaced transverse plates each spanning the longitudinal plates at the opposite ends thereof, and intermeshed slots at the ends of the longitudinal and transverse plates retaining the same in assembled relationship. A pair of carrier elements having opposing arcuate slots transversely span the longitudinal plates and are interlocked with a pipe for suspending the latter from a suitable support.
    Type: Grant
    Filed: May 15, 1989
    Date of Patent: August 7, 1990
    Assignee: Lisega GmbH
    Inventor: Gerhard Liesegang
  • Patent number: 4930732
    Abstract: A yoke pipe clip for supporting pipes comprises a pair of generally parallel longitudinal plates in side-by-side spaced relationship, a pair of generally transverse plates disposed one at each opposite end of the longitudinal plates, a suspension bracket positioned between the opposite ends of the longitudinal plates, a yoke, and interlocked slot and lug connections for securing the suspension bracket to the longitudinal plates and also for securing the longitudinal and transverse plates to each other.
    Type: Grant
    Filed: May 15, 1989
    Date of Patent: June 5, 1990
    Assignee: Lisega GmbH
    Inventor: Hans-Herlof Hardtke
  • Patent number: 4928799
    Abstract: A hydraulic dashpot comprising a cylinder, a piston separating the cylinder into a pair of chambers, a rod connected to the piston and projecting outwardly of the cylinder, a storage chamber for compensating hydraulic fluid, and a passage for conducting compensating fluid between the storage chamber and the pair of chambers. A first valve is provided in the passage for controlling fluid flow between the passage in at least one of the pair of chambers with the first valve being accommodated in a first valve body. A second valve is immediately upstream of the first valve body and closes fluid communication through the passage in a direction away from the storage chamber in automatic response to the removal of the first valve body from the passage.
    Type: Grant
    Filed: May 15, 1989
    Date of Patent: May 29, 1990
    Assignee: LISEGA GmbH
    Inventor: Lothar Zschiesche
  • Patent number: 4928911
    Abstract: A pipe supporting bracket comprised of a pair of generally identical clip elements with each clip element being defined by a foot which is normal to a lower bar portion and a semicircular pipe gripping portion between the lower bar portion and an upper bar portion. The clips are placed in side-by-side relationship with the pipe gripping portions opening in opposed relationship to each other and gripping a pipe therebetween. The feet are directed opposite each other, and cooperative threaded bolts and nuts secure the upper and lower bar portions together to lend stability and security to the pipe supporting bracket.
    Type: Grant
    Filed: May 15, 1989
    Date of Patent: May 29, 1990
    Assignee: Lisega GmbH
    Inventor: Hans H. Hardtke