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VSI Corporation Patents
Assignee:
VSI Corporation
Address:
Chantilly, VA
No. of patents:
60
Patents:


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Patent Number Title Of Patent Date Issued
5607273 Printed circuit board wedge section retainer March 4, 1997
A printed circuit board wedge assembly having a center section riveted to a printed circuit board. The center section is designed to allow the wedge operating shaft running longitudinally through the wedge assembly to be positioned into the center section opening with no obstructions. A
5452979 Fastener assembly September 26, 1995
A fastener assembly for securing a first panel member to a second panel member in a spaced-apart relationship. The fastener comprises a tubular shank portion having first and second end portions, a cavity being formed in the shank portion. A first spring member is secured on the outside
5438891 Collet type fastener removal tool August 8, 1995
There is disclosed a power driven tool for the removal of locking collars of the frangible fasteners used in the aerospace industry. The tool has a drive motor and gear housing with a stationary sleeve which projects from the housing. Within the stationary sleeve are mounted a rotational
5414594 Self-adjusting insertion/extraction apparatus for printed circuit boards May 9, 1995
A self-adjusting insertion/extraction apparatus is disclosed for inserting and extracting a printed circuit (PC) board into and from an electrical connector mounted at the base of a PC board rack, the apparatus being configured to function effectively regardless of limited variations in
5366330 Fastener head with internal recess having a radial slot configuration and installation tool ther November 22, 1994
A fastener head having a pair of recesses formed therein, a ledge in each recess being located a short distance axially below the head surface and extending a predetermined angular length from the axial portion of the ledge. The dimension of the ledge is adjustable to accommodate the
5362111 Anti-rotation locking device for preventing separation of coupling nuts from fluid lines November 8, 1994
A spring clip having two apertured end portions. In the preferred embodiment, the first end portion has an unidirectional clutch formed into the aperture wall, or face. The second end portion provides an aperture wall formed to provide an anti-rotation feature. In one embodiment, the
5336028 Captive screw assembly August 9, 1994
A captive screw assembly for mounting in flat panels of widely varying thicknesses. The assembly includes an inverted hollow cup with an outwardly extending flange on its lower edge to engage a back surface of the panel and is temporarily held in place by outwardly-projecting spring
5257557 Driven tool locking mechanism November 2, 1993
There is disclosed a direct acting lock mechanism to secure a tool within a driver which is useful for securing open channel sockets used to securing aerospace fasteners in a driver. These sockets have a flatted shank, typically hexagonal in cross section, and are received in a socket
5256017 Composite blind rivet assembly October 26, 1993
A blind rivet assembly comprising a body made with an insertion head at one end and having a setting concave face at the other end, and an axial thread hole in which a screw is located, the screw having a head at one end and a break-away stem at the other end. A deformable, cylindrical
5228817 Lightweight lockbolt fastener system July 20, 1993
An improved lockbolt fastener system wherein the pin has a threaded section with at least one axial slot to provide an anti-rotation lock. The wall of the collar has a plurality of axially extending grooves extending radially outwardly from the collar internal diameter.
5207544 Fastener assembly May 4, 1993
A fastener assembly for securing a first panel member to a second panel member in a spaced-apart relationship. The fastener comprises a tubular shank portion having first and second end portions, a cavity being formed in the shank portion. A first spring member is secured on the outside
5165311 Pneumatic nut installation tool November 24, 1992
A pneumatic nut installation tool has a plunger assembly which advances from a retracted position near the rear of the tool through a nut pickup station to an extended position extending from the front of the tool. A nut shuttle delivers a nut in front of the plunger assembly before it
5137406 Shear-transfer fastener assembly August 11, 1992
A fastener assembly which includes a nut held loosely by a cage secured to an inaccessible surface of a panel. Serrations in the facing surfaces of the cage and the nut cause them to mutually interlock when pressed together by a tightened bolt passing through aligned apertures in the
5119665 Installation tool for captive panel fastener June 9, 1992
A tool for installing a retaining ring onto the threaded shank of a bolt to form a captive panel fastener. Alignment tabs formed on the retaining ring are positioned into cutout portions formed in the nose area of the tool. The tool and ring are then engaged onto the bolt from the outer
5095779 Collet type fastener removal tool March 17, 1992
There is disclosed a tool for the removal of locking collars of the frangible fasteners used in the aerospace industry, particularly for removal of fasteners installed in close quarters such in a deep channel where conventional tools cannot grip the collar. The tool has a collet-type
5094491 Hydraulic fitting nut lock March 10, 1992
A fluid connector fitting nut lock includes a sleeve that fits down over the nut and that has an integral locking mechanism to fix the sleeve in a raised position that allows the nut to be turned and in a locked position that prevents the nut from backing off due to vibration or other ex
5092726 Self-locking fastener, fastener system, and process March 3, 1992
Wrenching lobes of an internally threaded nut are separated by circumferential, tapered walls so that the lobes and contiguous portions of the walls deform in radial compression upon reaching a predetermined preload and displace radially inwardly while the central portions of the wal
5092723 Engine clip bolt March 3, 1992
Bolt material is orbitally swaged into recesses in the clip while simultaneously swaging bolt material over the clip to develop a torsional interference lock and an axial interference lock, respectively between the clip and the bolt. The recesses are arc shaped, have a center of curvatur
5090840 Printed circuit board mounting apparatus February 25, 1992
A locking wedge apparatus for fastening a printed circuit board within an elongated slot in a rack. The apparatus comprises a first member having an elongated, flexible portion terminating in first and second apertured end portions, the elongated and apertured end portions forming a rect
5082406 Self locking panel fastener with device for visually indicating whether fastener is locked January 21, 1992
A self locking panel fastener comprising a receptacle connected to one of the two panels being secured together, the receptacle having an internally threaded nut portion, an externally threaded stud having a head portion extendible through the apertures of the panels, a shaped end portio
5076747 Panel fastener having internal threads and having maximum retaining ring retention capability December 31, 1991
An internally threaded fastener comprising a stud having internal threads, a stud hold-out ring, a grommet having a cylindrical surface of a first diameter, external slots formed in the surface and a retaining ring having inwardly extending projections adapted to slide within the grommet
5061132 Self-locking fastener October 29, 1991
A self-locking fastener system comprises a pin for receipt in a hole in a workpiece and having an external thread which mates with a collar having an internal thread for carrying a tensile load. A plurality of helically extending flutes in the external thread on the pin collectively exte
5056208 Method for providing captive panel fastener assembly October 15, 1991
A method for forming a captive panel fastener assembly, the assembly comprising a bolt having head, shank and threaded outer end portions, slots extending longitudinally down through the bolt threads toward the outer end of the bolt and a retaining ring for securing the bolt to a pan
5044225 Pneumatic nut installation tool September 3, 1991
A pneumatic nut installation tool has a plunger assembly which advances from a retracted position near the rear of the tool through a nut pickup station to an extended position extending from the front of the tool. A nut shuttle delivers a nut in front of the plunger assembly before it
5039265 Lightweight fastener August 13, 1991
An aerospace fastener comprises a blot with a roll-formed thread, and a nut with a similar thread having a uniform pitch P. The bolt has a cylindrical shank, a threaded tip and a run-out zone between the shank and tip. The thread root in the run-out follows a smooth S-shaped curve with t
5033924 Lock nut having a deformablel threaded bore July 23, 1991
An improved lock nut of the kind having a deformable section at one end, with a generally elliptical cross-section. The deformable section has a maximum radial thickness in the region of the ellipse's minor axis, to provide a desired degree of frictional locking when threaded onto a bolt
5011355 Push button type fastener releasable by rotation April 30, 1991
A push button type fastener for releasably joining together two panels. A stud assembly is snap-fit to one panel, and a mating socket is snap fit to the other panel. The stud assembly and the socket are releasably secured to each other merely by pushing a stud of the stud assembly toward
5002418 Hold down device with extended capture pawl mechanism March 26, 1991
A hold down device is provided using a drive knob having a clutch therein which turns a drive shaft for moving a pawl shaft in and out with respect to the drive shaft. A pawl on the end of the pawl shaft is provided with a cam-like surface which engages a cam-like aperture in a pawl rece
4995777 Fastener with self-retaining collar February 26, 1991
A self-retaining collar for a pin of a two-piece fastener has a projection or detent from its inner surface for engaging locking grooves of the pin. The pin has a head and a shank, the locking grooves being formed on the shank. The fastener holds two or more workpieces together in tensio
4980959 Installation tool for helical coil inserts January 1, 1991
A tool for use in automatically installing a helical coil insert to a preselected depth in a tapped hole formed in a workpiece. The tool includes a tubular tool body carrying an insert near its lower end, and a mandrel threadedly received in the tool body for engaging the insert and
4974274 Method of making an engine clip bolt December 4, 1990
Bolt material is orbitally swaged into recesses in the clip while simultaneously swaging bolt material over the clip to develop a torsional interference lock and an axial interference lock, respectively between the clip and the bolt. The recesses are arc shaped, have a center of curvatur
4915559 Lightweight fastener April 10, 1990
An aerospace fastener comprises a bolt with a roll-formed thread, and a nut with a similar thread having a uniform pitch P. The bolt has a cylindrical shank, a threaded tip and a run-out zone between the shank and tip. The thread root in the run-out follows a concave curve having a radiu
4862773 Collet type fastener removal tool September 5, 1989
There is disclosed a tool for the removal of locking collars of the frangible fasteners used in the aerospace industry, particularly for removal of fasteners installed in close quarters such in a deep channel where conventional tools cannot grip the collar. The tool has a collet-type
4842466 Lightweight fastener June 27, 1989
An aerospace fastener comprises a bolt with a roll formed thread, and a nut with a similar thread having a uniform pitch P. The bolt has a cylindrical shank, a threaded tip and a run-out zone between the shank and tip. In the run-out, which is no longer than 2P, and in preferred embodime
4750390 Hand wrenching tool for installation of torque limited fasteners June 14, 1988
The invention is a wrenching tool useful for installation of the frangible, or torque-limiting, fasteners which are commonly used in the aerospace industry. The tool has a head with a post that is seated in the wrenching ring of fastener and is pivotally mounted on the jaw end of a handl
4742735 Driver for a lobed collar May 10, 1988
A driver has a deltoid wrenching and deforming socket in the form of an equilateral triangle with rounded corners. Flats of the socket between the apexes of the triangle bear on lobes of a collar to thread the collar onto a pin in the making of a joint. At a predetermined clamp-up load o
4721022 Wrenching tool January 26, 1988
There is disclosed an improved wrenching tool which utilizes readily removable key member that is axially restrained in a key holder of the tool member by a detent ball and that can be released from the tool by precisely aligning the key holder to the outer, rotationally driven socket
4638849 Nozzle assembly for die casting apparatus January 27, 1987
A nozzle assembly for delivering molten metal to a die casting mold comprises a relatively large diameter cylindrical main body section, a relatively small diameter inlet tip section, and a relatively small diameter outlet tip section. Separate heater elements are wrapped around the
4617844 Removable key for wrenching tool October 21, 1986
There is disclosed a removable torque-transmitting body, such as a key and methods for securing the key in, and releasing it from, a power assisted wrenching tool for the attachment of fasteners, particularly frangible fasteners, in loose and interference fit applications. The key has a
4604010 Draw bar type flange mounted tool holder August 5, 1986
A tool holder for use with a mounting system including a spindle having a central frusto-conical bore and a draw bolt positioned centrally in the upper end of the spindle bore. The tool holder includes a central cylindrical main body portion having an annular groove in its upper end; a
4595044 Die casting apparatus June 17, 1986
A die casting apparatus for pumping molten metal from a heated container to a nozzle communicating with an inlet of a mold including a charging mechanism for charging the apparatus with a predetermined amount of molten metal from the container and a multi-piece holder removably joined
4544312 Pin and process for its manufacture October 1, 1985
A threaded pin has flutes along the threads formed by roll-forming threads over a preformed section having either flat sides or dished sides. The major diameter of the threads lies along ridge crests bordering the flutes, and the minor diameter of the threads lies at the base of the
4538483 Fastener wrenching means September 3, 1985
There is disclosed an improved power assisted wrenching tool for the attachment of fasteners in loose and interference fit applications, and particularly for use with frangible fasteners. The improvement comprises a readily removable key which is used to immobilize the bolt during at
4487226 Failure sensing hydraulic accumulator and system December 11, 1984
A failure sensing accumulator device and to a system embodying the same. The accumulator and system are characterized in that various failure situations are sensed by a capacitive sensor apparatus which is capable of detecting failures at an early stage and localizing the damage to the
4480811 Fail-safe actuator device November 6, 1984
The present invention relates to a fail-safe actuator of the type in which a piston riding in a cylinder is urged toward a port end of the cylinder by an energy storage spring. The piston is prevented from moving toward the port end so long as liquid remains entraped between the piston a
4428401 Failure sensing hydraulic accumulator and system January 31, 1984
A failure sensing accumulator device and to a system embodying the same. The accumulator and system are characterized in that various failure situations are sensed by a capacitive sensor apparatus which is capable of detecting failures at an early stage and localizing the damage resultin
4427028 Resistance welded accumulator device January 24, 1984
The present invention is directed to an accumulator device and method of making the same characterized in that the bladder support member is connected to the body of the pressure vessel by a resistance weld between relatively thin gauge portions of the vessel and the bladder support, the
4383353 Process of forming a joint with a predetermined clamp-up load May 17, 1983
A collar threads onto a shear pin. When the collar engages a surface of a workpiece, resistance to further threading increases. When sufficient resistance to threading occurs, a setting driver upsets lobes of the collar and forces these lobes radially inward toward the axis of the co
4364416 Low cost accumulator device December 21, 1982
The present invention is directed to an accumulator device and more particularly to an accumulator device having a spherical reservoir chamber which is preferably formed by hydraulic distension of a shell. A casing, bladder, and mounting fixture are combined with the shell by a metal
4355662 Repairable accumulator device October 26, 1982
A hydraulic accumulator or pulse dampener device susceptible of being repaired by replacing the bladder assembly through a removable gas charging valve. The device is characterized by a structure connecting the bladder assembly to elements of the gas charging valve assembly whereby a
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