Ships – Implements – Hull cleaning
Patent
1985-05-31
1988-01-05
Nase, Jeffrey V.
Ships
Implements
Hull cleaning
440 38, 239144, 2394195, 239526, 299 17, 134167R, B63B 5900
Patent
active
047168498
ABSTRACT:
An erosive fluid jet tool for underwater operation, comprising an erosive fluid jet nozzle connected to a fluid receiver receiving fluid under elevated pressure for providing hydraulic power to the tool, the nozzle providing the working output jet of the tool; and a counterthruster for providing a counterthrusting force for balancing the thrust on the tool produced by the erosive fluid jet, the counterthruster including (a) a counterthrusting fluid jet nozzle connected to the fluid receiver and facing oppositely to the erosive nozzle for providing a counterthrusting jet, and (b) an open ended shroud coaxially surrounding the counterthrusting nozzle, whereby water surrounding the submerged tool is entrained through the shroud for providing additional counterthrusting force during operation of the counterthrusting nozzle, the erosive fluid jet nozzle and the counterthruster being constructed so that in excess of 50% of the hydraulic power provided to the tool is provided to the erosive fluid jet nozzle.
REFERENCES:
patent: 2720390 (1955-10-01), Brooks
patent: 3251331 (1966-05-01), Crawford
patent: 3536263 (1970-10-01), Parker
patent: 3580511 (1971-05-01), Hammelman
patent: 3885739 (1975-05-01), Tuttle
patent: 4074652 (1978-02-01), Jackson
patent: 4389071 (1983-06-01), Johnson, Jr. et al.
"The Zero Thrust Gun", Marine Engineering/Log International, Feb. 1978, p. 59.
Conn Andrew F.
Johnson, Jr. Virgil E.
Nase Jeffrey V.
Sotelo Jesus D.
Tracor Hydronautics, Inc.
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