Abstract:
A method of forming a score line in a rupture disc using a laser is provided, wherein the method includes selecting a wavelength for the laser that maximizes absorption of the laser radiation by the disc material, selecting a pulse duration for the laser that maximizes a peak power of the laser, selecting a pulse repetition rate for the laser that reduces a heat affected zone of the rupture disc during ablation, and selecting the speed of relative motion between the laser and the rupture disc. The score line is ablated in the rupture disc using the laser to remove material from the rupture disc as vapor without melting or oxidizing disc material adjacent the material being removed.
Abstract:
A rupture disc for use in a pressure relief system includes a dome having a concave and a convex side and a circumferential flange associated therewith. At least one control score is formed or otherwise produced in the dome at a radial position between an apex of the dome and an outer circumference of the dome. At least one of a depth, a width, a length and the radial portion of the at least one control score is selectively controlled so that the depth, width, length, and/or radial position of the at least one control score controls the pressure at which the dome will start to collapse.
Abstract:
A deployable tent assembly for sheltering occupants of an outdoor event includes a tent formed to define a dome such that the tent has the ornamental appearance of an American football helmet. A plurality of tent poles is each integrated into the tent for biasing the tent to define the dome. A balloon is attachable to the tent which comprises a plurality of intersecting members to have the ornamental appearance of a face mask of an American football helmet. A fill port is fluidly integrated into the balloon and the fill port can be fluidly coupled to a source of compressed air for inflating the balloon.
Abstract:
Aspects for rigidly positioning a load-bearing bar are disclosed. In one aspect, a method includes positioning a bar between two surfaces so that one end is oriented towards one surface, and the other end is oriented towards another surface. The method also comprises rotating a crank to facilitate having each end make contact with its corresponding surface. Here, rotating the crank extends an extension shaft away from a control shaft, whereas rotating in an opposite direction inserts the extension shaft into the control shaft. An apparatus is also disclosed, which includes a control shaft comprising a crank that rotates a gear assembly, and an extension shaft coupled to the control shaft. Here, the extension shaft extends away from the control shaft when the gear assembly rotates in a first direction, and retracts when the gear assembly rotates in an opposite direction.
Abstract:
A load protection bar for securing cargo comprising: a cylindrical body; an adjusting extension, where said extension extends from one end of the cylindrical body; and a means to adjust the length of the adjusting extension. The means to adjust may include a hand-cranking handle. The load protection bar may further include a foot at one end of the body and a foot at the end of the adjusting extension, where each foot is made of plastic.
Abstract:
A rupture disc for use in a pressure relief system includes a dome having a concave and a convex side and a circumferential flange associated therewith. At least one control score is formed or otherwise produced in the dome at a radial position between an apex of the dome and an outer circumference of the dome. At least one of a depth, a width, a length and the radial portion of the at least one control score is selectively controlled so that the depth, width, length, and/or radial position of the at least one control score controls the pressure at which the dome will start to collapse.
Abstract:
A method of repairing a generator blower hub assembly (12) and rotor blade (10) removed from the generator blower hub assembly (12) where the rotor blade (10) has fatigued material in threads of a threaded blade root (14). The method may include removing (32) at least a portion of the fatigued material to form the blade root (14) to a first or new diameter. Threads may be formed (36) on the diameter of the blade root (14) using a roll forming process. A collar (20) may be secured within a threaded hole (16) formed in the generator blower hub assembly (12) where the collar (20) includes internal threads (35) for receiving the threads formed on the diameter of the blade root (14), which may be threaded into the collar (20). Collar (20) may be fabricated of steel alloy and include relief groove (40) for improving the fatigue resistance of the threaded blade root (14) when reassembled into the generator blower hub assembly (12).
Abstract:
The present invention relates to an apparatus for providing a pneumatic assist device for a bicycle, wheelchair or other wheeled device. The pneumatic assist device is configured for providing bionic assistance using a pneumatic system. The device further comprises a ball-bearing gear box, a plurality of gears, a bionic assist component, and a pedal assembly. Further, an assist arm engages a gear inside the gear box, and the bionic assist component attaches to a wheel lock, then the pedal assembly has a pump providing pneumatic pressure for a smooth bicycle ride. A plurality of guides align the gears of the gearbox, and a plurality of elastic bands also engage ball-bearings of the gearbox.
Abstract:
Aspects for rigidly positioning a load-bearing bar are disclosed. In one aspect, a method includes positioning a bar between two surfaces so that one end is oriented towards one surface, and the other end is oriented towards another surface. The method also comprises rotating a crank to facilitate having each end make contact with its corresponding surface. Here, rotating the crank extends an extension shaft away from a control shaft, whereas rotating in an opposite direction inserts the extension shaft into the control shaft. An apparatus is also disclosed, which includes a control shaft comprising a crank that rotates a gear assembly, and an extension shaft coupled to the control shaft. Here, the extension shaft extends away from the control shaft when the gear assembly rotates in a first direction, and retracts when the gear assembly rotates in an opposite direction.
Abstract:
A method of repairing a generator blower hub assembly (12) and rotor blade (10) removed from the generator blower hub assembly (12) where the rotor blade (10) has fatigued material in threads of a threaded blade root (14). The method may include removing (32) at least a portion of the fatigued material to form the blade root (14) to a first or new diameter. Threads may be formed (36) on the diameter of the blade root (14) using a roll forming process. A collar (20) may be secured within a threaded hole (16) formed in the generator blower hub assembly (12) where the collar (20) includes internal threads (35) for receiving the threads formed on the diameter of the blade root (14), which may be threaded into the collar (20). Collar (20) may be fabricated of steel alloy and include relief groove (40) for improving the fatigue resistance of the threaded blade root (14) when reassembled into the generator blower hub assembly (12).