Abstract: An elastic sealing ring expanding apparatus includes a base on which a plurality of posts are disposed, an assembly platform supported on the base by the posts, a plurality of rods movably mounted on the assembly platform, and a driving device mounted on the base. The driving device is configured to drive the rods to move from a center of a rectangle toward a plurality of corners of the rectangle along a plurality of straight paths, expanding an elastic sealing ring sleeved on the rods into a rectangular ring with a predetermined length-width ratio.

Abstract: The object of the present invention is to reduce galling that occurs at a tapered thread according to generation of excessive pressure on a tip end side of the tapered thread. In order to attain the above-mentioned object, a tapered thread according to the present invention is characterized in that it is a tapered thread comprising a taper-shaped external thread threadedly engaged with a taper-shaped internal thread formed in a member that is to be fastened, a tapered thread center hole is formed in a bottom surface of the external thread, and a depth of the tapered thread center hole is not more than a half of an axial length of the external thread.

Abstract: The present application provides an extraction system for removing a retaining pin from a turbine engine. The extraction system may include a pin extraction fixture and a drill such that the pin extraction fixture positions the drill about the retaining pin. The pin extraction fixture may include a collet and one or more expanders positioned thereabout.

Abstract: A clamping apparatus for drilling oblique holes has a clamping device and a guiding device. The clamping device has a positioning set and a clamping set. The positioning set has a positioning arm and an operating handle. The operating handle is pivotally connected to the positioning arm and has a release lever and a pushing lever. The clamping set is pivotally connected to the positioning set and has a clamping arm and an adjusting shaft. The clamping arm is pivotally connected to the positioning arm and has a holding grip. The adjusting shaft is rotatably connected to the holding grip. The guiding device is detachably and adjustably connected to the clamping device and has a guiding mount. The guiding mount is detachably and adjustably connected to the clamping arm and has a guiding hole.

Abstract: A simple and inexpensive hand-held drill bit guide that can be conveniently used with electrically powered hand-held drills to provide a precisely perpendicular orientation angle with respect to the surface of an article to be drilled, wherein the surface may be flat, cornered or otherwise generally non-planar, e.g. convex, concave, cylindrical, etc. The drill bit guide has first and second guidance members, wherein a guidance hole communicates therewith in perpendicular relation thereto for guiding a bit inserted thereinto with respect to a surface of an article interfaced with one of the first and second guidance members such that always the guidance hole will be oriented perpendicularly with respect to the surface.

Abstract: The invention relates generally to clamping devices and mechanisms which provide versatile and/or accurate coupling between the communicating members. Some embodiments relate to the field of woodworking and a doweling jig therefor having a hinged jaw mechanism to provide improved clamping between the doweling jig and a workpiece. Some embodiments relate to a connection or attachment device having a hinged jaw mechanism for detachably attaching a body portion to a structure or support element. Advantageously, the hinged jaw mechanism compensates for angular variations and irregularity in shape of the workpiece, structure or support. The hinged jaw mechanism desirably provides load bearing substantially over its entire length span.

Abstract: A laser target includes a shank having a first wedge converging from a step to a distal end of the wedge. A complementary second wedge is mounted on the step and converges with the first wedge. The two wedges have respective target apertures aligned with each other transversely therethrough.

Abstract: A fixture for use with eddy current inspection probes facilitates inspection of airfoil leading and trailing edges. The fixture includes a fixture body having a hole formed in one side thereof for receiving a probe and a V-groove formed in another side thereof for receiving a workpiece surface. A clamp arm is pivotally mounted to the fixture body, and a spring is disposed between the clamp arm and the fixture body. The spring biases one end of the clamp arm towards the fixture body so that a workpiece can be clamped between the clamp arm and the fixture body.