Class 411/434 - Moved by fluent pressure

Subclass of Class 411 - Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener
Definition: Subject matter wherein the fastener means is further adapted
No. of patents: 33
Last issue date: 01/04/2011

Number	Title	Issue Date
7862282	Separation fastener with segmented washer A separation fastener assembly including a base and a housing positioned adjacent the base. A nut is disposed in the cavity. A bolt extends through an aperture in the base and including an end coupled to the nut. A washer is positioned proximate the nut and operativ...	01/04/2011
7713014	Explosive bolt An explosive attachment device for mechanical connection of components, internally provided with an explosive charge, the detonation shock effect of which is strong enough for rupturing a connection forming part of the attachment device for a rapid disconnection, wh...	05/11/2010
7217206	Active tensioner An automatic tensioner having a load cell for detecting and controlling a power transmission belt tension. The tensioner comprises a lead screw driven by an electric motor for setting a lever arm/pulley position and thereby a belt load. The tensioner also comprises ...	05/15/2007
7195439	Tightening member A hydraulic nut having a first part connected around the first end of a fixing member the first part having an annular recess which opens to receive a second part forming an annular member which fits within the annular recess, wherein a pressurized medium chamber is...	03/27/2007
7140824	Tensioning hydraulic nuts A hydraulic tensioning system for nuts on studbolts has a puller bar and a puller buddy, which are coupled to the studbolt, and a bridge around the nut. The puller bar is internally coupled to the studbolt (and may engage the nut before the tension is applied). The ...	11/28/2006
7127994	Low shock separation joint Methods and apparatus are provided for a low shock separation joint. A first member couples to a first structure and includes surfaces to prevent separation under compressive and tensile force placed on the separation joint. A second member couples to a second struc...	10/31/2006
7090454	Ratchet interlocking housing A fastener, such as a housing, for mounting to a structure, such as a panel, that has an aperture formed therethrough. The fastener includes a shank member and an annular nut member that is configured to align coaxially with the shank member. The shank member is ins...	08/15/2006
7063490	Hydraulic nut, device and method for mounting or dismounting a hollow article A hydraulic nut having a piston which is movable in a fluid chamber of a nut body and which has a radial protrusion from the piston and a displacement bar mounted on the protrusion. The displacement bar overlies the nut body and extends past the nut body by an amoun...	06/20/2006
7008156	Load transfer apparatus A first load-receiving member having a cylinder and a screw hole through which a bolt is thread-engaged and a second load-receiving member having a piston and a fastening face that is made in contact with a member to be fastened are attached to a nut, and a number o...	03/07/2006
7001127	Non-pyrolytically actuated reduced-shock separation fastener A separable fastener for holding two objects together with the use of a bolt threaded into the fastener. The necessary inherent axial tension in the bolt/fastener system is accommodated by a relief element which relieves at least some of the stored tension before th...	02/21/2006
6925939	Low shock separation bolt The invention is a low shock detachment device that includes an expandable latch with a plurality of fingers. The anterior surface of each finger has a stud-mating mechanism. A mechanism for repositioning each finger from a closed position to an open position is pro...	08/09/2005
6685406	Perforated nut tensioning system A stud tensioning device includes a nut having internal threads and external threads. The internal threads engage corresponding threads on the stud. At least two axial bores are defined by the nut, and posts are disposed in the bores. Each post at a first...	02/03/2004
6629486	Resettable separation nut with a low level of induced shock The technical field of the invention is that of devices for connecting and separating objects such as microsatellites with respect to a structure. More specifically, the invention relates to a separation device (1) intended to release a screw (8) which holds t...	10/07/2003
6352397	Reduced shock separation fastener A separable threaded fastener tightened to hold two objects together with an axial preload on the fastener. Fastener structure minimizes mechanical shock loads on contiguous structures when elements of the fastener are abruptly separated from one another ...	03/05/2002
5779419	Hydraulic nut for mounting conical objects A method and hydraulic nut for mounting a hollow article which has a conically shaped opening, such as a conical ring, on a conical shaft. The method comprises the following steps: a) installing the hollow article on the shaft, in order to fit the conical...	07/14/1998
5730569	Hydraulically assisted fastener element An hydraulically assisted fastener has a pressure means (13) nested in a recess (15) or groove in a nut (11) or a thrust washer with a filler neck (20, 31, 44) whereat a nipple (14) can be used as a means of pumping grease or oil to the pressure means. Th...	03/24/1998
5695306	Fusible member connection apparatus and method A connection apparatus utilizes a structural element made of fusible material supported directly in the connection load path of the device. A carrier mechanism is axially translatably supported in the device and utilizes a connecting member to connect two...	12/09/1997
5690458	Hydraulic bolt tensioner A hydraulic bolt tensioner having a first chamber and a second chamber, a first hollow piston movable in the first chamber and partially extending into the second chamber, a second piston displaceable inside the first piston and movable in the second cham...	11/25/1997
5468106	Hydraulic tensioning device An annular piston and cylinder device comprises an annular cylinder and a piston therefor, the piston having sidewall portions which extend into the cylinder towards the base thereof in the form of tapering annular webs which together define between them ...	11/21/1995
5165762	Bicycle wheel quick-release apparatus A quick-release apparatus having improved features is used with a hub and axle assembly for attaching a bicycle wheel to the frame of the bicycle. The assembly includes a hollow hub for mounting a bicycle wheel and a hollow axle extending through the hub ...	11/24/1992
4854798	In-place tensioning washer The in-place tensioning washer apparatus mounts about a stud to be tensioned. The apparatus has an upper portion, a lower portion, and an expanding torus positioned therebetween. With the stud threaded into the workpiece, the washer is slid onto the stud ...	08/08/1989
4802806	Tension device for tightening and loosening bolts or pins Tension device for tightening and loosening bolts or pins, formed by a body having at least one jack (40) equipped with a piston (25). Each jack (40) is associated with at least two bolts or pins (3) placed next to one another for simultaneous tightening ...	02/07/1989
4737059	Easily releaseable fastener There is disclosed an easily releaseable, internally threaded fastener having at least one axial slot which extends substantially through the wall of the fastener. The external wall of the fastener is non-cylindrical, e.g. hexagonal, or three-lobed, to pe...	04/12/1988
4725176	Fluid actuated nut A fluid actuated nut having a cylindrical casing engageable at an inner end with a base, the casing containing a coaxial relatively axially shiftable plunger having an inwardly opening partial central bore for threadedly receiving a shank of a bolt, a com...	02/16/1988
4723352	Method of applying and removing fluid actuated nut A method of applying and removing a fluid actuated nut, the nut having a cylindrical casing engageable at an inner end with a base, the casing containing a coaxial relatively axially shiftable plunger having an inwardly opening partial central bore for th...	02/09/1988
4192621	Method for interconnecting two shaft-ends and a shaft coupling made in accordance with said method The invention refers to a method for interconnecting two flange-provided shaft ends by means of taper pin bolts and expander sleeves co-operating therewith as well as a shaft coupling assembled accordingly. The shaft coupling is intended to transfer very ...	03/11/1980
4182215	Failsafe hydraulic prestressing nut The present invention relates to hydraulic prestressing nuts for setting a tensile stress in a bolt whereon the nut of the present invention is turned. The invention involves a nut body wherein an annular piston is arranged to be hydraulically extended fr...	01/08/1980
4132145	Free spinning washer-nut assembly A washer-nut assembly wherein a sheet metal nut is rotatably coupled within an annular plastic washer. The nut has an inner threaded barrel portion for engaging the threads of a cooperating bolt, an outer barrel portion shaped for engagement by a tighteni...	01/02/1979
4085649	Bolt assembly The disclosure relates to an arrangement of bolt assemblies for connecting one element with another element, the bolt assembly comprising several bolt and hydraulic nut units which each consist of an outer nut and an inner nut which is exteriorly threaded...	04/25/1978
4064783	Pressure-balanced underwater structural release system A pressure-balanced separation nut for releasably engaging a threaded elet. The separation nut includes nut segments which are housed within the cavity of a housing and are held in an assembled element-engaging condition by a slidable piston and a piston...	12/27/1977
3962950	Bolt pretensioning device An annular piston has a bore threaded to a bolt end and is disposed between a base and a nut in axially spaced relation to the nut, there being an annular cylinder slidably receiving and surrounding the piston and defining an annular pressure chamber ther...	06/15/1976
3947948	Method of assembling and disassembling a pre-tensioned screwed joint and a device for carrying out the method A pre-tensioned, screwed joint is assembled or disassembled by using a piston and rod arrangement to elastically extend the screw while a nut is applied or removed....	04/06/1976
3943817	Split bolt The split bolt comprises plural bolt segments having threaded outer surfaces which are brought radially together to render the bolt insertable into a complementary threaded recess, and spaced radially apart to cause the bolt threads to become engaged when...	03/16/1976

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Class 411/434 - Moved by fluent pressure