Tension Applied During Working Patents (Class 29/DIG42)
  • Patent number: 5743307
    Abstract: A system for bringing ground warp threads under tension on a beam stand comprises first and second rollers on which the ground warp threads run. The first roller is mounted on a support which is movable in relation to the second roller. A mechanism for exerting force on the support is provided whereby the ground warp threads on the beam stand are brought under tension. The mechanism includes a hydraulic element that is connected to a hydraulic pressure vessel by a pipe provided with an apparatus for controlling or regulating the hydraulic fluid.
    Type: Grant
    Filed: October 17, 1996
    Date of Patent: April 28, 1998
    Assignee: Michel Van De Wiele N.V.
    Inventors: Carlos Derudder, Joseph Verschelde
  • Patent number: 5077084
    Abstract: In a process for producing a flexible printed base by directly coating a copper foil with a polyimide precursor, followed by heating, drying and curing, a process affording a flexible printed base having a superior folding endurance and a good heat resistance at a cheap cost is provided, which process comprises carrying out the curing in an inert gas under a tension of 0.02 to 0.2 Kg/cm and at 200.degree. and 450.degree. C.
    Type: Grant
    Filed: February 1, 1990
    Date of Patent: December 31, 1991
    Assignee: Chisso Corporation
    Inventors: Shiro Konotsune, Atsushi Takahashi, Shouichi Fukunaga, Kazutsune Kikuta
  • Patent number: 4707912
    Abstract: A crash protection apparatus for a pulling device having a hollow piston cylinder and a pulling claw for pulling a tube out of a tube sheet of a heat exchanger chamber in which the pulling device is disposed, the crash protection apparatus includes another cylinder without a piston rod having an axis substantially parallel to the axis of the hollow-piston cylinder and being fixed relative to the tube sheet in the chamber, a piston of the other cylinder, a bracket extending from the piston substantially at a right angle to the axis of the other cylinder for supporting the pulling device with a supporting force provided by the other cylinder, and a device for controlling the supporting force for compensating only the weight of the pulling device in each position of the pulling device.
    Type: Grant
    Filed: June 12, 1986
    Date of Patent: November 24, 1987
    Assignee: Brown Boveri Reaktor GmbH
    Inventor: Hans Haller
  • Patent number: 4685190
    Abstract: A method of producing steel-wire-reinforced conveyer belts. The steel wires, which are conveyed at a uniform tension through the production apparatus, each have associated with them a respective hydraulic tensioning cylinder. The cylinders, which communicate with one another, are acted upon by a pulsating fluid pressure. In this way, varying movement resistances can be reduced, resulting in extensive uniformity of the tension state of all of the wires.
    Type: Grant
    Filed: November 27, 1985
    Date of Patent: August 11, 1987
    Assignee: Continental Gummi-Werke Aktiengesellschaft
    Inventors: Hans Specht, Walter Kase
  • Patent number: 4601215
    Abstract: This shaft is formed by a tube in a single piece having one end portion which is enlarged and cut away so as to constitute a universal joint yoke 5. A main cylindrical body 18 having a wall of reduced thickness connects this yoke to a portion 23 of greater wall thickness and provided with two slots 22 constituting a locking keeper. At the end of the shaft opposed to the yoke there is formed a steering wheel support constituted by a portion of the tube which has a smaller diameter and a greater wall thickness.
    Type: Grant
    Filed: April 16, 1984
    Date of Patent: July 22, 1986
    Assignee: Cycles Peugeot
    Inventors: Jean-Pierre Barnabe, Michel Clerc, Frederic Mouhot
  • Patent number: 4448053
    Abstract: An improved method of stress rolling a metallic rim includes the additional step of applying an outside force to the rim to produce tensile stress in the region which is being stress rolled to produce a higher resulting compressive stress within the region than could otherwise be obtained through normal stress rolling.
    Type: Grant
    Filed: May 18, 1982
    Date of Patent: May 15, 1984
    Assignee: Rockwell International Corporation
    Inventor: Roy C. Holmstrom
  • Patent number: 4386458
    Abstract: Residual favorable stresses are induced in a zone of stress concentration in a coupling and connection joint mechanism of a drill collar or drilling tool, for example. The residual favorable stress is created by tensily stressing the material within elastic limits, relieving the stress in the zone by heating the material therein into a nonstressed plastic or liquid state, and releasing the tensile stress maintained in an area adjacent the zone. The residual force of elasticity in the area adjacent the zone applies the favorable residual stress in the zone. Preferably, the favorable residual stress is a compressive stress to resist fatigue failures from tension-induced cracks. The extent and depth of penetration of the favorable residual stress in the zone is controlled and is substantially greater than that available from mechanical cold-working surface-hardening techniques.
    Type: Grant
    Filed: March 31, 1981
    Date of Patent: June 7, 1983
    Inventor: Robert F. Evans