摘要:
A pouch includes a seamless body having a first end and a second end opposite to the first end, with a substantially flat, planar base at the first end. First and second opposing walls extend upwardly from the planar base to form an elongate mouth at the second end. Each of the opposing walls includes an upper wall portion and a lower wall portion. The upper wall portions extend to the elongate mouth and the lower wall portions extend to the planar base. The first and second opposing walls have a varying thickness. An elongate closure mechanism, adjacent to the elongate mouth, provides a resealable closure for the pouch. The seamless body stands independently in an upright position upon the planar base when the body is in an expanded position. The pouch, being both flexible and collapsible, can be folded into a substantially flat condition.
摘要:
The invention is a movable barrier system for controlling access to a secured premise utilizing biometric technology. More particularly, a system in accordance with the present invention comprises a movable barrier, an operator adapted to control movement of the movable barrier, and a biometric device adapted to sense a user's biometric parameters to identify and authorize the user to control access to the premises. When a user enters his or her biometric parameter in the biometric device and the user's biometric parameter is matched and identified, the biometric device generates a security signal to the movable barrier operator indicating the user is authorized to control access. The user enters a command to the movable barrier that is received by the movable barrier operator. The movable barrier operator relays the command to the movable barrier and the movable barrier performs in accordance to the command.
摘要:
A centrifugal engine includes first and second centrifugal assemblies having independent assembly hub structures, each hub structure being rotatably mounted to a common bearing mount to rotate co-axially and in opposite directions; several spokes protruding radially from each hub structure; a mobile mass structure slidably mounted to each spoke; a rotation motor; several mass structure displacement motors, each for displacing one mobile mass structure along a corresponding spoke; a power source delivering electrical energy to the rotation motor to rotate each hub structure and attached spokes relative to the bearing mount, and also to the mass structure displacement motor to sequentially move the mobile mass structures longitudinally along the spokes and radially away from the given the hub structure and then rapidly toward the hub structure at a repeating rotational position to impart linear force to the assembly.
摘要:
An improved method for removing proppant from fluid used in an oil and gas well for reuse in future operations. The proppant is separated from the well fluid and transported to a materials collection tank. A crane then transports the materials collection tank onto a processing boat. On the processing boat, the proppant is vacuumed from the materials collection tank to a hopper. The proppant is then discharged from the hopper into a holding tank for treatment and reuse. In a first alternative embodiment, two hoppers are positioned above each other so that the proppant can be added to the upper hopper and then fed by gravity to the lower hopper. A valving arrangement maintains vacuum within the interior of at least one hopper at all times to provide a continuous vacuum operation. A conduit discharges from the lower hopper into the holding tank.