A transient heating burner including at least two burner elements each including a distribution nozzle configured to flow a first fluid and an annular nozzle surrounding the distribution nozzle and configured to flow a second fluid, the burner also including a controller programmed to independently control the flow of the first fluid to each distribution nozzle such that at least one of the distribution nozzles is active and at least one of the distribution nozzles is passive, wherein flow in an active distribution nozzle is greater than an average flow to the distribution nozzles and flow in a passive distribution nozzle is less than the average flow to the distribution nozzles, wherein the first fluid contains a reactant that is one of fuel and oxidant and the second fluid contains a reactant that is the other of fuel and oxidant.

Provided is a vehicle wheel. The vehicle wheel disclosed herein includes a disc member to which an axle is connected, and a rim portion connected to the disc member and on which a tire is mounted. The rim portion includes a first tire mounting portion connected to the disc member and including a first bead seat coming into contact with an outer bead of the tire, a second tire mounting portion located including a second bead seat coming into contact with an inner bead of the tire, and a well portion including an outer well portion extending from the first tire mounting portion, and an inner well portion configured to connect the outer well portion to the second tire mounting portion, and wherein a thickness is formed to be thinner in an order of the outer well portion, the second bead seat, and the inner well portion.

A rim for a mountain bike is provided, including a rim body having a rim well, a rim base and two lateral rim flanks and a hollow space device with a hollow space. A width of the rim body is larger than 30 mm. The hollow space device of the rim body is radially outwardly limited by the rim well and laterally and radially inwardly, by an inner enclosing wall including the rim base and the rim flanks. The radially inwardly enclosing wall forms an internal wall that is substantially closed, apart from the nipple accommodations. The rim well includes a plurality of recesses having a surface proportion of at least 10% of a surface of the rim well.

A vehicle rim having outboard and inboard bead seats and an annular well flank connected to the outboard bead seat and extending radially inwardly and towards the inboard side of the rim. A transition portion is defined between the well flank and the inboard bead seat. The transition portion has a circumferential corrugated profile having a circumferentially concave-shaped outboard groove connected to the well flank at a first tangency point, and wherein the outboard groove defines the inner-most radial dimension of the rim. The transition portion further includes a circumferentially convex-shaped ridge directly connected to the outboard groove at a second tangency point, and a circumferentially concave-shaped inboard groove directly connected to the ridge at a third tangency point, and wherein the inboard groove is connected to the inboard bead seat at a fourth tangency point.

A vehicle rim including outboard and inboard bead seats and an annular well flank connected to the outboard bead seat and extending radially inwardly and towards the inboard side of the rim. A well base is connected to the well flank, wherein the well base defines a flat profile, and wherein the well base defines the inner-most radial dimension of the rim. A transition portion is defined between the well flank and the inboard bead seat. The transition portion has a circumferential corrugated profile having a circumferentially concave-shaped outboard groove connected to the well base at a first tangency point, a circumferentially convex-shaped ridge directly connected to the outboard groove at a second tangency point, and a circumferentially concave-shaped inboard groove directly connected to the ridge at a third tangency point. The inboard groove is connected to the inboard bead seat at a fourth tangency point.

A bicycle wheel rim having a circular base portion including a proximal surface and a distal surface, and a pair of integral sidewalls extending generally radially outward from an intersection region of the proximal surface and the distal surface. The distal surface of the rim has a central hump, a trough contiguous with the central hump extending axially outward from the hump, and a flat shelf immediately adjacent, contiguous with, and extending axially outward from the trough. Another embodiment of the invention is directed to a bicycle wheel including the embodied rim, a plurality a spokes engaged at respective ends thereof with the rim and a hub engaged with the plurality of spoke members at opposite ends thereof. Another embodiment of the invention is directed to a bicycle wheel assembly comprising the embodied wheel and a tube and/or tire mounted on the rim.

A wheel rim that includes a peripheral structure for receiving a tire, and a central structure for coupling with a hub of the vehicle. The peripheral structure includes, for each side of the wheel rim, a peripheral flange, a connecting wall on which the bead of the tire rests, and a connecting part. The peripheral structure includes a central well. The connecting part includes a first curved region which joins the central well, and a second curved region between the first curved region and the connecting wall. The second curved region has a convex profile from the side of the wheel rim with the tire, and includes a first curved surface joined to the connecting wall with a first radius of curvature, and a second curved surface between the first curved surface and the first curved region, with a second radius of curvature different from the first radius of curvature.

A wheel assembly includes a rim having a primary tire bead retention ridge; a plurality of secondary bead retention members; and a plurality of sealing members. The plurality of secondary bead retention members are removably coupleable to receptacles of the rim such that a portion of each secondary bead retention member extends into a pressurized portion of the wheel, is positioned behind a tire bead seat, and extends radially beyond the primary tire bead retention ridge.