1416 results about "Counterbore" patented technology

Method of tapping a bone plate intraoperatively. A bone plate having an aperture may be selected, and the bone plate may be placed on a bone. A thread may be formed in the aperture using a tap device with the bone plate disposed on the bone. A hole may be formed in the bone, with the hole in alignment with the aperture. The hole may be widened adjacent the aperture to create a counterbore in the bone. A fastener may be advanced into threaded engagement with the thread after removal of the tap device from the aperture.

A feedthrough device includes a conductive ferrule having an outer peripheral surface defining the outermost boundary of the feedthrough device, an insulator, a lead wire electrically isolated from the ferrule extending through the insulator, a filter capacitor adjacent the insulator through which the lead wire extends in conductive relation therewith, and a ground wire coupled to the ferrule and to the insulator within the outermost boundary of the feedthrough device. The ferrule has an inner peripheral surface defining an opening therethrough and each of the insulator and the filter capacitor has an outer peripheral surface proximate the inner peripheral surface, a counterbore in the outer peripheral surface of each of the insulator and filter capacitor, an end of the ground wire being received in the counterbore and brazed to the ferrule and insulator. Alternatively, an end of the ground wire is welded to the inner peripheral surface of the ferrule.

An adjustable height bicycle seat post assembly comprises a hollow seat post for supporting a bicycle seat slidably supported on plastic shims inside a hollow tube. The hollow tube clamps into the frame of a bicycle. A main spring forces the post upward, but a locking mechanism interconnects the post with the tube in various fixed positions relative to the tube. The locking mechanism includes a foundation and a projection extending from the foundation having a counterbore for guiding a plunger into holes on the post. The locking mechanism adheres to the outside of the tube to bear shearing forces on the plunger. An endcap on the locking mechanism and a top cap on the tube protect the assembly from foreign debris. The locking mechanism may be manipulated remotely using a magnetic switch assembly or manually using a manual assembly.

An axle assembly with an axle housing with a pair of bearing journals, a differential assembly disposed between the bearing journals, a pair of differential bearings and a pair of hollow adjusters that can be threaded into the bearing journals to preload the differential bearings and control gear lash between a pinion and a ring gear. Retaining members can be non-rotatably engage to the hollow adjusters and can be press-fit into counterbores in the outboard sides of the bearing journals. The axle housing can include an unitarily formed differential housing with a body and an axle tube structure, and a first axle tube that can be discretely formed and coupled to the body.

A universal accessory mount for a heavy machine gun includes an annular base adapted to be disposed concentrically over a front end of a shroud of the gun and having diametrically opposing upper and lower accessory mounting tines extending forwardly therefrom. A holding mechanism pulls a planar floor of a counterbore in the rear of the base into contact with a planar front surface of the shroud of the gun. The holding mechanism includes a pair of threaded bolts extending rearwardly from the base through respective ones of a pair of diametrically opposing bolt apertures contained in the base, and a pair of cleats, each having an opening into which a rear end portion of a respective one of the bolts is received and a respective hook adapted to grip the shroud of the gun through a respective hole in the shroud.

A multipole ion guide is configured to improve the transmission efficiency of ions which traverse the length of one ion guide and enter either another multipole ion guide such as a quadrupole mass analyzer or a three dimensional ion trap. The ion transfer multipole ion guide radial dimensions are reduced such that the pole assembly and an appropriately shaped exit lens can be positioned within a portion of the internal space defined by the larger radius second multipole ion guide poles. Ions exiting the first ion guide of reduced size find themselves inside the second ion guide close to the centerline. In this manner ions can be efficiently transferred from one ion guide to another, even for those ions with low kinetic energies. In a second embodiment of the invention, the exit region of a multipole ion guide is configured such that the multipole ion guide poles can be extended into a counterbore of a three dimensional ion trap end cap electrode. With this configuration, ions (including those with low kinetic energies) can be transferred into a three dimensional ion trap with increased trapping efficiency.

A novel method and apparatus for riveting a two-piece suture tray package. A two-piece suture tray assembly is provided having a top member and a bottom member. The top member has a top and a bottom, and plurality of rivet members extending down from the bottom of the top member. The rivet members have free ends. The bottom member has a top and a flat bottom surface, and a plurality of rivet receiving openings extending therethrough. A counterbore surrounds each rivet receiving opening in the flat bottom surface. An ultrasonic riveting apparatus is provided having a clamp member with a cavity, and an ultrasonic horn member having a flat bottom moveably mounted in the cavity The assembly is mounted in the riveting apparatus and engaged by the clamp member. The flat bottom of the horn member engages the free ends of the rivet members, and when energized by an ultrasonic generator, causes the free ends of the rivet members to deform into the counterbores, such that the free ends are flat and in alignment with the bottom surface of the bottom member.

A method and instrument is used for inserting a bone screw into a hole in a bone plate and into bone at a maximum angulation of a bone screw central longitudinal axis with respect to a central axis of the hole. The maximum angulation is that which places the head of the bone screw at or below an outwardly facing surface of the bone plate. The instrument has a distal end including a gauge element, spaced proximally from an end surface of the distal end when in contact with a counterbore surrounding the plate hole. The space is less than or equal to a distance from the counterbore surface to the outwardly facing surface of the bone plate. The instrument is tilted with respect to a central axis of the bone plate hole to an angle wherein the gauge element remains at or below the outwardly facing surface of the bone plate adjacent the counterbore. A hole is drilled in the bone through a guide bore in the instrument.

A test socket including a contactor having a distal end which is received within a tapered retainer for guiding the distal end of the contactor and into a terminal housing having a counterbore such that movement of the distal end of the contactor is restricted by the counterbore of the terminal is disclosed.

A clamp tie includes a locking head and flexible straps extending therefrom. The straps are insertable through the locking head to form spaced loops, which may secure items in a spaced relationship. Pawl mechanisms in the locking head secure the straps in looped configuration. An aperture through the locking head is provided for securing the tie to a mounting structure such as a shouldered mounting stud. An additional pawl mechanism may be provided within the aperture to secure the tie to the stud. Arcuate surfaces extend from the locking head, spaced from the straps, to further engage secured items. The upper and lower surfaces of the locking head have counterbores to receive mounting hardware and provide minimal variance of wall thickness throughout the locking head to reduce cure time and materials required for manufacture.

A connectable cigarette filter comprises a mouthpiece and a plurality of, or one to two, or two to three filter units connected with the mouthpiece. The mouthpiece is an inclined cylindrical body centrally provided with a stepped aperture. The stepped aperture has a front section formed as a sloped cavity. The inclined cylindrical body has a rear section whose outer surface is provided with a pair of planes. The filter unit is a stepped cylindrical body with a stepped through-hole comprising a large-diameter through-hole and a small-diameter through-hole. The front section of the stepped through-hole is formed as a sloped counterbore. The stepped cylindrical body has a rear section formed as a small-diameter, sloped cylindrical body which is shaped and sized according to the sloped counterbore, so that the small-diameter, sloped cylindrical body of one filter unit is insertable into the sloped counterbore of another filter unit.

A fastener system for retaining a loose elongate fastener in a counterbore, including an elongate fastener, such as a bolt, having a head for being received and retained in a counterbore in a structure and in generally flush relation to a surface of the structure surrounding the counterbore, and a retaining member for being secured to the structure proximate the counterbore and overlapping the counterbore to trap the loose fastener in the counterbore.

The invention discloses a support structure of a foundation pit, which solves the problem of complex disassembly and assembly of an existing support structure of the foundation pit. The support structure of the foundation pit adopts the technical scheme that the support structure comprises a plurality of support assemblies, wherein the plurality of support assemblies are arranged along the side wall of the foundation pit, the support assemblies comprise bottom plates which are fixed to the bottom of the foundation pit, protective plates which are used for supporting the side wall of the foundation pit and support assemblies which are used for connecting the bottom plates and the protective plates, clamping grooves are formed in both sides of the protective plates in a height direction, connecting baffles of which the edges of both sides are respectively clamped into the clamping grooves are arranged between the adjacent protective plates, fixed counterbores are formed in one side, which is far from the side wall of the foundation pit, of the connecting baffles, support rods which are used for tightly pressing the connecting baffles on the side wall of the foundation pit and are inserted into the side wall of the foundation pit are installed in the fixed counterbores, and the support structure of the foundation pit is simple and convenient to install and remove in the foundationpit.

A driveshaft assembly for a downhole motor comprises a housing and a driveshaft rotatably disposed within the housing. The driveshaft has a central axis and a first end. Further, the driveshaft assembly comprises a driveshaft adapter having a first end coupled to the first end of the driveshaft with a universal joint. The first end of the driveshaft adapter includes a counterbore. The first end of the driveshaft and the universal joint are disposed in the counterbore. Still further, the driveshaft assembly comprises an end cap disposed about the driveshaft and coaxially coupled to the adapter. Moreover, the driveshaft assembly comprises a seal boot disposed about the driveshaft and adapted to restrict fluid flow through a annular gap positioned between the driveshaft and the end cap. The driveshaft assembly also comprises a locking assembly adapted to restrict the end cap from moving axially relative to the adapter.

In a double-shoulder threaded tool joint connection, the pin external threads and the box internal threads have a thread taper between 0.75 inch per foot and 1.0 inch per foot. The pin external threads and the box internal threads have equal stab flank and load flank angles, and are in a range from thirty-three to thirty-nine degrees. Both the pin external threads and the box internal threads have roots formed in a shape of a portion of a circle tangent to both thread flanks with a minimum radius of 0.063 inch. The pin external threads and the box internal threads are in the range of two to three per inch. The box counterbore has a length of 0.750 or less. The pin nose has a length in a range of 30% to 90% of the length of the box counterbore.