its like a a self feeding trowel. brilliant.
heres a short excerpt from the abstract:
Plaster slurry supplied at 12 to the pump typically includes any material, particularly a settable cementitious substance such as hydrated lime, capable of application by troweling. The slurry is delivered to the trowel head 13 via a long heavy conduit 14 and a short lightweight flexible hose 15 connected in series, for application at 16. The hose 15 enables ready manipulation of the trowel with minimum encumbrance by the heavier conduit. A control indicated at 17 enables the user to control delivery of pressurized plaster at the head, whenever desired. For example, an electrical switch at 18, proximate the interconnection of the conduit and hose, is manipulable by the user with one hand, while he holds the trowel in the other hand, to control energization of a clutch in the drive that in turn controls transmission of drive from a prime mover means to the pump.
https://www.google.com/patents/US3403960?dq=plasterers+patent+flexible+trowel&hl=en&sa=X&ei=5bj0VJDJCpG6aeuXgagF&ved=0CCsQ6AEwAg
Anyone ever come across this?
Theres all sorts of plastering inventions. Theres flexible trowels going back to the last century :RpS_sneaky:. Saw a plasterers glove, as well. like a leather pouch that goes over the handle of the trowel and your hand to stop plaster or cement getting on it.