A winding stem mechanism including a winding shaft having a detent portion comprised of a pair of annular peripheral recesses with an annular step portion therebetween, and a pair of annular stops each adjacent a respective one of the recesses, and mounted for rotation and for being axially slidable. A resilient spring-like member normally engages a first of the recesses to define a normal position of the shaft and when the shaft travels in a first axial direction the spring-like member climbs t...

A valve body has a stem passage rotatably receiving a valve stem. A packing surrounds the stem in the passage and a packing nut threaded on the stem applies axial force to radially expand the packing into sealing engagement with the stem and passage wall. The packing comprises cooperating first and second packing members engaging at an angularly disposed slippage surface for translation of compressive axial forces into radial expansion and sealing engagement with the stem and passage wall. A pac...

An apparatus for manufacturing a glass stem for an electron tube has a plurality of lead-in conductors and a plurality of fillets with the lead-in conductors extending through the fillets. The apparatus comprises a first stem mold assembly and a second stem mold assembly for forming the stem therebetween. The first stem mold assembly comprises a universal stem mold having a plurality of longitudinal fillet-forming openings formed through a mold block. A plurality of inserts are replaceably dispo...

A tool for pulling a valve stem and removing the valve core of a Schrader-type pneumatic valve includes an elongate flexible shaft having opposite end portions and a handle affixed to one end portion and a valve-core engaging member including a threaded rear portion and an unthreaded forked front portion for cooperating with a flat member of a Schrader-type valve core for rotating the core to remove it from the valve. The threaded rear portion is threadable into interior threads of the valve whe...

An adjustable bicycle handlebar stem which is based on a C-clamp enlarged adequately to accommodate a pair of half-cylindrical upper and lower adjusting members. The adjusting members are made as a hollow structure to decrease the weight of the bicycle. The upper and lower adjusting members are interlocked through the meshing of a keyway and slot. Since both adjusting members contain two symmetric eccentric curved notches to accommodate the bicycle handlebar, the position of the handlebar can be...

A handlebar stem is provided having a shank and a front extension for mounting a handlebar. The front extension extends at an angle relative to the shank. Extending through the front extension from the shank is a bolt for fixing the front extension relative to the shank. The handlebar stem is light, slender and is of simple construction with a minimum of projecting parts.

A stem for an endoprosthesis to be anchored in a bone (3) comprises a chamber (4) which surrounds the stem periprosthetically, which can be sealed in a pressure tight manner and which can be expanded with a thermoplastic or thermostable filling material (16). The rigid stem (1) of the endoprosthesis is connected mechanically to the bone (3) via the expandable chamber (4) by means of the filling material (16). The filling material is isolated from the bone (3), however, by the wall of the pressur...

An adjustable bicycle stem includes a downwardly projecting member adapted for insertion into a conventional receptacle in the frame of the bicycle and an adjustable forwardly projecting member adapted to hold the bicycle handlebar. The downwardly and forwardly projecting members of the bicycle stem are coupled for rotational adjustment of the forwardly projecting member with respect to the downwardly projecting member by providing a toothed adjustment plate and engaging pin arrangement by which...

A tool intended to facilitate the trimming of the stem of a patellar prosthesis to adapt the length of the stem to fit differing cross-sectional thickness of a human patella is disclosed. The trimming tool includes a seat area for receiving the prosthesis and a cap member for securing the prothesis in the seat. The cap area includes an aperture therethrough which exposes a specific length of stem for trimming. A cutting guide on the cap member ensures that the stem is cut in a perpendicular orie...

A valve stem has a thickness of hardfaced material on its outer diameter in the area contacting the stem packing where the seal is formed which prevents corrosion, erosion and/or scratching of the valve stem, thereby preventing formation of leak paths. A valve packing comprises a vertically stacked array comprising alternating metal pressure rings and graphite seals.