摘要:
A damper including an inertia valve movable between an open position and a closed position to selectively alter the compression damping rate of the shock absorber is disclosed. In these embodiments, the damper has at least one chamber that at least partially surrounds two other chambers.
摘要:
A bicycle suspension assembly is first provided with an inertia valve for selectively altering the compression damping rate of the shock absorber. The bicycle suspension assembly is also provided with at least one adjustable fluid damping circuit through which fluid may flow during operation of the suspension assembly. The fluid flow resistance through the adjustable fluid damping circuit may be adjusted without requiring any disassembly of the bicycle suspension assembly by using a movable external controller.
摘要:
A method for making an energetic material is described, and which includes the steps of providing a source of aqueous nitric acid having a concentration of less than about 95% by weight; mixing a surfactant with the source of the aqueous nitric acid so as to dehydrate the aqueous nitric acid to produce a source of nitronium ions; providing a carbon dioxide environment; providing a source of an organic material to be nitrated to the carbon dioxide environment; and controllably mixing the source of nitronium ions with the carbon dioxide environment to nitrate the organic material and produce a resulting energetic material.
摘要:
A quick coupler hitch has a one piece curved tube frame, rearwardly projecting upwardly opening hooks on each leg of the frame, each hook having a latch pivotable between an unlocked position and a locked position. A central pivot mechanism is mounted on the curved tube frame and has a shaft with a generally vertical axis. Flexible links extend through the curved tube frame between the central pivot mechanism and each of the latches. The central pivot mechanism is manually pivotable about the generally vertical axis of the shaft to retract or extend the flexible links to lock or unlock the latches.
摘要:
A self-contained avionics sensing and flight control system is provided for an unmanned aerial vehicle (UAV). The system includes sensors for sensing flight control parameters and surveillance parameters, and a Global Positioning System (GPS) receiver. Flight control parameters and location signals are processed to generate flight control signals. A Field Programmable Gate Array (FPGA) is configured to provide a look-up table storing sets of values with each set being associated with a servo mechanism mounted on the UAV and with each value in each set indicating a unique duty cycle for the servo mechanism associated therewith. Each value in each set is further indexed to a bit position indicative of a unique percentage of a maximum duty cycle for the servo mechanism associated therewith. The FPGA is further configured to provide a plurality of pulse width modulation (PWM) generators coupled to the look-up table. Each PWM generator is associated with and adapted to be coupled to one of the servo mechanisms.
摘要:
A method for fabricating a piezoelectric fiber sheet comprises providing a plurality of wafers of piezoelectric material, bonding the wafers together with an adhesive material to form a stack of alternating layers of piezoelectric material and adhesive material, and cutting through the stack in a direction substantially parallel to the thickness of the stack and across the alternating layers of piezoelectric material and adhesive material to provide at least one piezoelectric fiber sheet having two sides comprising a plurality of piezoelectric fibers in juxtaposition to the adhesive material.
摘要:
A space-dividing wall panel system having a plurality of upright wall panels serially connected one with the other by an intermediate upright support post. The height of each wall panel is adjusted by modular panel extension assemblies which are mounted on base panels supported by lower support posts and include extension posts connected to the lower support posts so as to be arranged coaxial therewith. Spaced apart pairs of the extension posts are connectable to a cross rail at upper ends thereof which defines a downwardly extending generally U-shaped extension frame. A serially adjacent pair of extension frames shares a common extension post which is connected to both of the cross rails thereof, where the base panel and the extension panel assembly disposed thereon respectively define base and beltline raceways for workstation cabling. Additional extension posts can be inserted into the upper ends of extension posts already positioned so as to vertically extend the height of the wall panel. Removable covers are provided so as to overlie the outward faces of the base panel and the extension panels which panel covers are spaced outwardly from the outer faces of the base panel and extension frame so as to define passages therebetween. The passages permit horizontal cabling along the base raceway and the beltline raceway between adjacent wall panels while further permitting vertical routing of cabling between the base and beltline raceways within each panel.
摘要:
A low-slung carriage-mounted lifting jack has a long tubular handle for projecting the jack beneath a conventional automotive vehicle. The handle is tiltably mounted on the carriage and simultaneously serves as a pump handle for pumping hydraulic fluid from a reservoir to a ram which in turn is operatively attached to an elevating linkage for lifting the vehicle. A pump, for operation of which the handle is tiltably mounted on the carriage, delivers hydraulic fluid under pressure from the reservoir to the ram. To release hydraulic pressure in the ram, for lowering the linkage and returning the fluid to the reservoir, there is a release valve with a release pin projecting adjacent the end of the handle which is tiltably mounted on the carriage. Within the handle is a rotatably mounted rod extending throughout the length of the handle, and on the end of the rod is a cam in operating engagement with the release pin. The cam moves the release pin to release, or lowering, position from which it is returned by hydraulic pressure when the cam action is discontinued.
摘要:
A design pre-cut shingle design kit to allow a craftsman, as well as a homeowner, to install a custom designed shingle to their home and a method of installing a design pre-cut shingle without the help of a skilled craftsman or carpenter. A precision ramping apparatus, system and accompanying methods allow the user to place an image on a wall.