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| Number | Title | Issue Date |
| 7329076 | Hole location gauges and methods The present invention provides devices and methods for indicating or gauging the position of one or more holes in a workpiece. In one aspect of the present invention reusable devices that can be removably engaged with a bore or tapped hole in a workpiece for accurat... | 02/12/2008 |
| 7108607 | Helical groove fasteners and methods for making same Helical groove fasteners and methods for producing the same are provided for use in systems requiring fluid passage through the fastener. In one embodiment, the fastener includes a shank, a head, a threaded portion, and at least one groove extending through at least... | 09/19/2006 |
| 6905500 | Bone fixation apparatus Disclosed is a bone fixation apparatus. This device comprises a bone screw having a head; a cap member placed on an upper part of the head of the bone screw; a receiver member having a bore in which the cap member and the head of the bone screw are respectively acco... | 06/14/2005 |
| 6883401 | Power tool for fastening objects A power tool for fastening objects has a housing with a non-rotatable element, a power drive in the housing and provided with a rotatable driving element, and a fastener part including a bolt having a thread and an axis and introducable into parts forming an object,... | 04/26/2005 |
| 6561741 | Fastener with aligning lead thread A fastener having an aligning lead thread that does not follow the helical pattern of the fill threads around the shank of the fastener. The aligning lead thread is located on the shank distant from the first full thread to enable the engage the threads o... | 05/13/2003 |
| 6210091 | Lock nut A lock nut for engagement with a thread of a bolt, in which a thread block is arranged in the body thereof for engaging with the thread of the bolt and is made eccentric with respect to the axis of the nut body so that an initial tightening force of the n... | 04/03/2001 |
| 6059500 | Arrangement and method for detecting a fatigue fracture of a bolted connection caused by overstressing An arrangement for detecting a fatigue fracture caused by overstressing of a bolted connection including a bolt and an internal-thread-bearing hollow section which is alternately stressed by an axial flux of force between zero and different maximal values... | 05/09/2000 |
| 6030162 | Axial tension screw A screw having a root and threads formed on the root. The screw is configured to generate and/or maintain axial compression between threads formed in leading and trailing sections of the screw either by virtue of pitch differential in the threads or the w... | 02/29/2000 |
| 5938383 | Connector assembly and method of forming same A connector assembly that is subjected to alternating loads by an axial flow of force between zero and various maximum values, with an outer assembly component designed as a hollow section and an inner assembly component located in the outer one and fitti... | 08/17/1999 |
| 5882160 | Loosening and dislodging preventing screw The present invention relates to a male and female screw set wherein the male screw comprises at least a projecting part pressing against the flank plane of the female screw when the male and female screws are engaged. A dimensional difference is formed b... | 03/16/1999 |
| 5860778 | Torque- and preload-controlled fastener and associated method of fastening A fastener and an associated fastening method are provided to securely join at least two structural elements to form a structural assembly. Although the fastener can join a variety of different types of structural elements, the fastener is particularly we... | 01/19/1999 |
| 5690456 | Apparatus for securing structural members together Apparatus for securing together structural members includes a stud threaded at both ends and a stud sleeve threaded at both ends. The stud and stud sleeve are coaxial with the stud extending through the stud sleeve and beyond the ends of the stud sleeve. ... | 11/25/1997 |
| 5490190 | Alignment pin and method for aligning a nuclear fuel assembly with respect to a core plate disposed in a nuclear reactor pressure vessel Self-locking alignment pin and method for aligning a nuclear fuel assembly with respect to a core plate disposed in a nuclear reactor pressure vessel. The fuel assembly has a top nozzle having a first bore formed therein. The core plate has a second bore ... | 02/06/1996 |
| 5403136 | Threaded fastener especially for orthopaedic purposes The fastener, which is especially adapted for bones, consists of a shaft (2) bearing a thread (1) with variable pitch, a front end (3) and a rear end (4). The thread (1) is present over the entire area of the shaft (2), and in the area of the rear end (4)... | 04/04/1995 |
| 5391033 | Nut lock A tamper-proof, self activating nut lock apparatus comprises a threaded shank having an external screw thread of a first pitch and a coaxial threaded bore at one end of the threaded shank, with an internal screw thread of a second pitch, both the said ext... | 02/21/1995 |
| 5335583 | Stopper mounting structure for use on rodless cylinder In a rodless cylinder, a moving member which is moved along a cylinder body is reduced in height for the sake of compactness and stability. A stopper is mounted on a stopper support base, which is also reduced in height to preclude the possibilities of ob... | 08/09/1994 |
| 5333976 | Center locking spacing bolt A spacing bolt assembly for securing to a surface includes a cylindrical inner bolt portion having a first end with external threads in a first direction and a second end with a head structure, an outer bolt portion having an axial bore for receiving the ... | 08/02/1994 |
| 4854844 | Die-lip adjusting mechanism A differential screw adjusting mechanism comprised of an externally and internally threaded adjusting nut which has a plurality of slots formed along its length. The internal threads of the adjusting nut cooperatively and threadedly engage screw threads a... | 08/08/1989 |
| 4846614 | Differential thread for transfer of screw thread forces A fastening apparatus is provided wherein the length of a mating threaded connection between two members is limited as a function of an effective differential pitch to the uniform pitch of the threads on both members whereby clearances of progressive incr... | 07/11/1989 |
| 4840526 | Gripping device for tensioning screwing elements A gripping device for tensioning a screwing element (2) which, at its free end, has an outer profile matching the inner profile of an engaging member (4). The screwing element (2) has an outer profile with teeth (20) of constant pitch and of constant cros... | 06/20/1989 |
| 4809556 | Preloading clamp A clamp for use in testing machines to prestress a joint between a driving shaft and a driven shaft, both of which are externally threaded with each having a flat surface abutting the other in a plane substantially perpendicular to the driving axis. The c... | 03/07/1989 |
| 4802805 | Fatigue resistant fasteners and related methods A fatigue resistant threaded connection includes a nut having two threads which are aligned axially but turned relative to one another about their common axis through an angle great enough to cause development of large axial forces between the screw and n... | 02/07/1989 |
| 4690600 | Threaded connection having multi-part threaded bolt The threaded connection is formed between a tapped component and an externally threaded two part bolt. The two bolt parts are each provided with an external thread of the same pitch and hand in order to be threaded simultaneously into the tapped component... | 09/01/1987 |
| 4661031 | Fatigue resistant fastener assembly A fastener assembly, having a threaded male and female member, is disclosed. One of the members has substantially conventional threads and the other member has two threaded portions rotationally offset relative to one another. Direction of the offset dete... | 04/28/1987 |
| 4629222 | Pipe connector A connector, for example for connecting a tubular member such as a pipe, comprises a male member which has an external frusto-conical surface provided with a thread and a female member having an internal frusto-conical surface provided with a thread for e... | 12/16/1986 |
| 4582348 | Pipe connector with varied thread pitch A connector, for example for connecting a tubular member such as a pipe, comprises a male member which has an external frusto-conical surface provided with a thread and a female member having an internal frusto-conical surface provided with a thread for e... | 04/15/1986 |
| 4445794 | Self-locking threaded bearing and bearing assembly and method of making such assembly The self-locking threaded bearing is an externally threaded tubular member having a discontinuous thread to form thread sections which are spaced-apart axially on the bearing. In the bearing assembly, the thread sections engage portions of an internal thr... | 05/01/1984 |
| 4278005 | Connecting bolt and coupling element Disclosed is a device comprising a connecting bolt having a gripping profile near one end and a coupling element having a profile adapted to engage the profile of the connecting bolt. The profile of the connecting bolt is a plurality of projecting teeth s... | 07/14/1981 |
| 4252167 | Device for positively locking a screw in a tapped hole The device comprises in combination a screwthreaded block and a screw which are hollow and have screwthreads of opposite direction. These screwthreads cooperate with screwthreads of respectively corresponding direction formed in the inner wall of the tapp... | 02/24/1981 |
| 4230336 | Ball component for coupling apparatus An attachment bolt extends upwardly through a support member and threadedly engages the ball component of a coupling apparatus. A locking member extends downwardly through the ball component and cammingly engages the attachment bolt with the pitch differe... | 10/28/1980 |
