Abstract: A piston-driven pump apparatus configured to transfer liquid-based abrasive materials via a pressurized hydraulic medium which is capable of physical manipulation between remote material reservoirs. The apparatus exhibits a remotely tethered double-acting pump having independence from a fluidic supply source. The pump is configured to be removed from a first material reservoir and placed in communication with a second material reservoir by physical manipulation. The apparatus has a cylindrical sleeve assembly which has a wearing sleeve which may be removed and/or rotated to increase the operational time of the apparatus before an end-of-life replacement of the sleeve is required. The apparatus diminishes a pulsation effect of conventional double-acting piston pumps via a compressible pressure sleeve which is capable of deformation within a pump housing. A metering device is present to control the external flow of abrasive material, providing back pressure against an internal compressible sleeve.

Abstract: A supplementary device for enhancing the operability of an automatic drywall finishing box assembly including a supplementary device having pneumatic features capable of supplying drywall compound to the point of application originating from a remote source.

Abstract: A supplementary device for enhancing the operability of an automatic drywall tape applicator including a supply tube capable of being enclosed within a material reservoir sleeve utilizing a plurality of actuators being positioned in a perpendicular relationship to the longitudinal axis of said automatic drywall tape applicator for supplying a continuous flow of drywall compound.

Abstract: A plant cultivation apparatus includes a housing with at least one receptacle arranged to receive and support a corresponding number of plants and at least one conduit attached to the housing connecting each of the receptacles with a reservoir such that at least a portion of each conduit is open to the atmosphere.