Class / Patent application number | Description | Number of patent applications / Date published |
081570380 | With tensioning means | 21 |
20090151517 | Bolted Assembly and Apparatus and Method for Tensioning the Bolted Assembly - A system and method of tensioning a bolt across a flange assembly. A tensioning apparatus includes the bolt and an unthreaded nut connected to the shank member by an interference fit. The interference fit may be selectively relaxed by applying a fluid pressure to a groove between the nut and the bolt. A tensioner is energized by a pressure to pre-load the bolt by pulling on the bolt while pushing on the nut while the interference fit is sufficiently relaxed to allow relative movement between the nut and the bolt. The tensioner is sized to achieve the required pre-load in the bolt at the same working fluid pressure that is necessary to relax the interference fit on the stretched bolt, thus permitting a single pressure source to be used for both functions. Once the pre-load is established, the interference fit is reestablished by releasing pressure to the nut to secure the nut in position for maintaining the closure force across the flange assembly after the tensioner is removed. Because the nut does not need to rotate, the pre-load may be applied directly through the nut without the use of a bridge, thereby eliminating the need for overstressing of the bolt to accommodate seating of the nut once the tensioner is relaxed. | 06-18-2009 |
20100000375 | Tamper resistant jackbolts for a tensioner - A multi jackbolt tensioner including a jackbolt body having a plurality of holes with threads to receive jackbolts having torque receiving surfaces all disposed about the periphery of each jackbolts in a mutually non parallel relation to prevent the unauthorized application of torque or stress. The torque receiving surfaces of each bolt head are defined by vertices at the intersect of n number of unsymmetrical arranged torque receiving surfaces of a polygon, where n is an odd integer. | 01-07-2010 |
20110005355 | APPARATUS, IN PARTICULAR FOR POSITIONING AND FASTENING A DEVICE, IN PARTICULAR A HANDLE ON A POWER TOOL - The invention relates to an apparatus for positioning and fastening a device, in particular of a handle on a power tool. The apparatus includes a receptacle for the device, which receptacle is adjustable between at least one positioning position and at least one fastening position. The at least two positions of the device are definable by a tension lever. A detent geometry, embodied with the receptacle, cooperates with a receptacle geometry, embodied on or associated with the power tool. Various radial positions of the apparatus relative to the power tool can be set by the detent geometry and the receptacle geometry. According to the invention, it is provided that in addition, an axial securing device associated with the apparatus or the power tool, is provided, which in the positioning position and the fastening position secures the apparatus in its axial position relative to the power tool. | 01-13-2011 |
20110048176 | Hydraulic Bolt Tensioning Device and Method for Tightening Large Bolts by Means of a Hydraulic Bolt Tensioning Device - A hydraulic bolt tensioning device has a cylinder supported on a machine part that is to be clamped by threaded bolt and nut. An exchangeable bushing has a first end screwed onto a free threaded end of the threaded bolt that projects past the nut. A tensioning piston is seal-tightly guided in the cylinder and supported on a second end of the exchangeable bushing. A pressure medium is supplied into an annular space between cylinder and piston. A control device is provided for setting a nominal pressure of the pressure medium corresponding to a nominal pretension of the threaded bolt. A yield limit detection device detects whether a yield limit of the threaded bolt is reached during tensioning. A controller acts on a pressure relief device for pressure relief of the bolt tensioning device when reaching, or shortly after reaching, the yield limit of the threaded bolt. | 03-03-2011 |
20110094347 | System and Method for Tensioning an Emergency Brake System - A brake tensioning system and method are described herein for use on vehicles. The system includes a tool, and the method includes the use of the tool to effectuate tensioning of a brake system conveniently, accurately, and repeatably. | 04-28-2011 |
20110120271 | SCREW PRESTRESSING DEVICE AND METHOD - A screw prestressing device having a piston and a draw pin structured and arranged to be disconnectably coupled to an element and movable, via the piston, to apply a defined prestressing force in the element. | 05-26-2011 |
20110192257 | Hydraulic Bolt Tensioner and Nut - A hydraulic bolt tensioner has a reduced height by virtue of inner seals between a cylinder and piston being aligned along a same plane. The tensioner also has a reduced width by virtue of carbon fiber would about the tensioner's housing, reducing the need for a certain thickness of material used for the tensioner's housing. | 08-11-2011 |
20110197716 | Rod Tensioning Device - A device is for tensioning a rod having a threaded portion and includes an actuator adapted to provide a tensioning axial force and a tie-rod adapted to transmit the axial force from the actuator to the threaded portion of the rod. The tie-rod includes a plurality of jaws, the jaws being movable radially between a closed position at which the jaws are engaged with the rod threaded portion and an open position at which the jaws are disengaged from the threaded portion, each jaw having an outer surface. A locking element includes a sleeve slidable axially along the tie-rod and disposable about the jaws, the sleeve having an inner frustoconical surface contactable with the outer surfaces of the jaws. | 08-18-2011 |
20110271798 | SCREW TENSIONING DEVICE - The screw tensioning device comprises a support tube ( | 11-10-2011 |
20120011969 | FASTENING TOOL - The invention provides a fastening method and a fastening tool which can stably fasten a nut to a bolt securely and with a small dispersion at a desired axial force. A fastened member is fastened by inserting a bolt to the fastened member, thereafter temporarily fastening a nut and the bolt, pulling a leading end of a shaft portion of the bolt in an axial direction of the bolt, rotating the nut so as to screw into the bolt while elastically deforming the bolt so as to generate an axial force, and thereafter canceling the pulling of the bolt. | 01-19-2012 |
20120266727 | Method and Apparatus for Tensioning an Emergency Brake System on a Vehicle - An apparatus and associated method for use in tensioning a park brake cable system includes a body including a housing and an input shaft, the input shaft positioned at least partially within the housing, the housing and the input shaft being axially movable relative to one another, and the input shaft and the outer housing being rotatable relative to one another, the body having a nut receiving recess. The cable system is tensioned by retracting the nut from its support surface, tensioning the system by rotating the nut, and relieving the nut back to its support surface. A control system is used to control the operation of the tensioning device, and is programmable to perform several associated functions. | 10-25-2012 |
20130087022 | Screw Tensioning Device - The invention relates to a novel screw tensioning device with a screw tensioning cylinder with a high-pressure hydraulic pump for pretensioning screws and loosening extremely secure pretensable screw connections and an accompanying control method. | 04-11-2013 |
20130139652 | Multiple stud tensioning machine and method for automatically controlling the elongation of a plurality of studs - A multiple stud tensioner machine adapted to exert a longitudinal pre-stressing traction on a plurality of studs ( | 06-06-2013 |
20130213188 | DOUBLE-SHAFT VARIABLE PROPELLER PITCH ELECTRIC BOLT-TIGHTENING MACHINE - A double-shaft variable propeller pitch electric bolt-tightening machine, comprising: a base body front end ( | 08-22-2013 |
20140000414 | Tensioning device for extending a threaded bolt | 01-02-2014 |
20140020515 | Tensioning device for extending a threaded bolt - A tensioning device for extending a threaded bolt by tensioning the threaded end section thereof is connectable to a hydraulic supply. The tensioning device has a supporting tube surrounding the threaded end section. A cylinder is arranged in continuation of the supporting tube and s piston is arranged in the cylinder and movable in longitudinal direction of the cylinder. An exchange socket is screwable to the threaded end section and configured to be carried along axially by the piston. A pin is movably arranged in the longitudinal direction and has a pin body with a first pin end supported in the longitudinal direction against the threaded end section of the threaded bolt. A sensing device senses a position of the pin in the longitudinal direction. An evaluation and control unit connected to the sensing device is acting on the hydraulic supply to enable the hydraulic supply. | 01-23-2014 |
20140060255 | TENSION DEVICE FOR PRESTRESSING AN ASSEMBLY BY MEANS OF A THREADED ROD, AND METHOD FOR ASSEMBLING THE TENSION DEVICE - Device for tensioning a threaded rod comprising an actuator able to exert an axial tensile force on the threaded rod with respect to a structure to be tensioned, the said tension device comprising a cylinder, a piston, a tubular skirt in contact with the cylinder and a surface of the said structure to be tensioned, and a tie for transmitting the axial tensile force of the actuator towards an end of the threaded rod. The tie and the tubular skirt each comprise at least two semicylindrical parts each having two substantially planar axial surfaces, the two axial surfaces of one semicylindrical part being joined radially respectively with one of the two axial surfaces of the other semicylindrical part, so as to form a part of revolution. | 03-06-2014 |
20140165789 | Tensioning device for extending a threaded bolt, and tool suitable for this purpose, preferably drive adapter - A tensioning device for treaded bolts has a supporting tube and a cylinder with a hydraulic supply connected thereto. The supporting tube surrounds the threaded end section of the bolt. A piston is moveable in the cylinder longitudinally. An exchange socket is connected to the piston and driven axially by it. The exchange socket has a first end with internal thread to be screwed onto the threaded end section and a second end with an external polygon member. A tool attachable to the external polygon member enables turning of the exchange socket. The tool has a cup-shaped section having a first open end and an inner side with tool faces that engage the external polygon member. The tool has a drive section that is slimmer than the cup-shaped section and connected to a second end of the cup-shaped section. The drive section extends away from the cup-shaped section. | 06-19-2014 |
20140174262 | Tension device for straining a threaded bolt - A tension device for straining a threaded bolt by applying a pulling force on a threaded end portion has a housing and a piston moveably disposed therein. A hydraulic supply is connected to the housing. A supporting tube is arranged on the housing. The supporting tube is arranged between the housing and a base surrounding the threaded bolt and transmits tension forces acting in the housing to the base surrounding the threaded bolt. A pull nut to be fastened by threaded engagement on a threaded end portion of the threaded bolt is provided. The pull nut has a pressure face supported in longitudinal direction on a pressure transmission face of the piston. A return spring acting on the piston in a direction toward the supporting tube has a first end bearing against a housing-side spring support and a second end bearing against a piston-side spring support. | 06-26-2014 |
20140245868 | SCREW TENSIONING DEVICE - The screw tensioning device comprises a support tube ( | 09-04-2014 |
20150314431 | Tensioning Device for Expanding a Threaded Bolt - A tensioning device for stretching a threaded bolt by applying tension to the threaded portion of the threaded bolt has a base and a support tube surrounding the threaded bolt and supported on the base. A cylinder housing is arranged as an axial extension on the support tube. A piston is moveably arranged in the cylinder housing and delimits together with an inner wall of the cylinder housing a hydraulic operating chamber. An interchangeable bush is rotatable relative to the piston and can be entrained axially by the piston. The interchangeable bush has an internal thread to establish a screw connection to the threaded portion. A device for path and/or position detection with first and second interacting elements is provided. The first element is fastened to the at least one piston and faces the cylinder housing. The second element is fastened to the cylinder housing and faces the piston. | 11-05-2015 |