Topic
Countersink
About: Countersink is a research topic. Over the lifetime, 1151 publications have been published within this topic receiving 6613 citations.
Papers published on a yearly basis
1 / 2
Papers
Patent•
9 Nov 2010
TL;DR: In this paper, the authors present a method for measuring fastener hole depth, fastener length, countersink depth and/or hole diameters in an automated and extremely rapid, efficient and accurate manner.
Abstract: The present invention is directed to automated apparatuses and methods for measuring fastener hole depth, fastener length, countersink depth and/or hole diameters in a workpiece (or other object) in an automated and extremely rapid, efficient and accurate manner. The apparatuses may be operably connected with a power source and with one or a plurality of computers or other data collection devices to transmit fastener hole depth, countersink depth and/or hole diameter measurement data and/or information to them each time that a fastener hole is measured, while the apparatus is continuously measuring fastener holes (i.e., with no interruptions). Extremely advantageously, using only one hand, and by only squeezing a trigger only one time, an operator of such an apparatus may successfully and very rapidly and accurately perform more than one, or all three, of the following functions: (i) normalize the apparatus relative to one or a plurality of fastener holes and/or workpiece surfaces; (ii) make one or a plurality of accurate measurements; and (iii) transmit the one or more measurements from the apparatus to one or a plurality of computers and/or other data collection devices for, for example, recordation, storage, manipulation, other use and/or the like.
123 citations
Patent•
10 May 1996
TL;DR: An improved two-ended reversible drill/driver tool for use with power drills is described in this article, where the tool has a hollow cylindrical socket that at one end has a drive shank for insertion into a chuck of a powered drill, and, at the opposite end, has a polygonally shaped opening therein for receiving a correspondingly shaped, twoended, reversible tool assembly.
Abstract: An improved two-ended reversible drill/driver tool for use with power drills. The tool having a hollow cylindrical socket that at one end has a drive shank for insertion into a chuck of a powered drill, and, at the opposite end, has a polygonally shaped opening therein for receiving a correspondingly shaped, two-ended, reversible tool assembly. This tool assembly is sized to slide within the hollow socket, and has a combined drill bit and countersink at one end, and, at the other end, a polygonally shaped opening for accepting a screw driver bit having a shank with a polygonal cross section.
117 citations
Patent•
6 Apr 1981
TL;DR: In this article, a bone compression plate is provided with several sliding slits for countersunk bone screws having ball heads in the longitudinal dimension of the plate, each sliding slit is countersunk in its end area opposite the fracture, the depth of which countersink in the plate determines the final axial position of the screwhead.
Abstract: A bone compression plate is provided with several sliding slits for countersunk bone screws having ball heads in the longitudinal dimension of the plate. Each sliding slit is countersunk in its end area opposite the fracture, the depth of which countersinking in the plate determines the final axial position of the screwhead. That depth is greater than that of the rest of the sliding slit. The bearing surface of the countersinking for the screwhead extends over an area which is included within an angle of more than 180°. It is thus possible, on the one hand, to move the plate with respect to the pieces of fractured bone to obtain a pressing together of the two pieces of bone when the bone screw has not been screwed tight. On the other hand, it is possible to fasten the plate immovably to one piece of the fractured bone by inserting a bone screw into the countersink slit. Pressing of the pieces of bone fragment together can be accomplished automatically by means of chamfering provided on the ball head of the countersunk bone screw in the area at the opposite end of the sliding slit. Deeper countersinking provided in the end area containing the original countersunk depression makes possible the positioning of the countersunk bone screw at an oblique angle.
103 citations
TL;DR: In this article, the compressive fracture strength of several Gr/Ep (AS/3501-5) laminates containing countersunk holes with both loaded and unloaded fasteners in place was analyzed.
Abstract: Results are presented for the compressive fracture strength of several Gr/Ep (AS/3501-5) laminates containing countersunk holes with both loaded and unloaded fasteners in place. Finite element stress analyses are presented which approximate the countersink geometry and the elastic contact problem. The average stress failure criterion is successfully used to predict the observed strengths in all cases considered.
102 citations
Patent•
23 Jun 1995
TL;DR: Preforated tubes as discussed by the authors are made by forming a perforation in flat strip of raw material, forming a hollow, cylindrical tube from the flat strip, and placing a removable plug into the perforations, so as to form a fluid-tight seal.
Abstract: Preperforated tubing is produced by forming a perforation in flat strip of raw material, forming a hollow, cylindrical tube from the flat strip, and placing a removable plug into the perforation, so as to form a fluid-tight seal. A sealing element may be placed into the perforation. The perforation may comprise a hole, into which first and second countersinks may be formed. The sealing element may be placed into the first countersink, and the plug may be placed through the countersinks and the hole, such that the plug's body fills the hole and the plug's head fits within the second countersink.
98 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 9 |
| 2020 | 28 |
| 2019 | 42 |
| 2018 | 50 |
| 2017 | 66 |
| 2016 | 64 |