Rotary kinetic fluid motors or pumps – Plural runners supported for relative motion or on separate... – Serially spaced in working fluid flow path
Patent
1993-11-09
1995-02-28
Look, Edward K.
Rotary kinetic fluid motors or pumps
Plural runners supported for relative motion or on separate...
Serially spaced in working fluid flow path
4152111, 415225, 416247R, F04D 1902, F04D 2954
Patent
active
053931971
ABSTRACT:
Improvements to a propulsion thrust apparatus are described wherein a propeller is surrounded by a ring cage structure with which propeller tip vortices are converted to useful mass flow with a plurality of rings whose spacing from each other and the propeller are selected so that in one embodiment at least one ring is placed inside an enclosure and the others are outside. The operation of the propeller then produces an enhanced circulation of the air inside the enclosure without hot spots. In another embodiment, the rings are segmented to provide additional vortices for enhancement of the propeller mass flow. With another embodiment, at last one of the rings are provided with discontinuities on the inside edge to promote the generation of vortices that improve mixing of tip vortices and provide a noise reduction effect. In still another embodiment, the rings are helically shaped and a heater can be incorporated inside the helical ring or the entire ring is made of an appropriately helically shaped heater element. With still another embodiment, a pressure chamber is formed in front of an enclosure or duct or housing and a pair of fans with ring cage structures are placed in tandem partially inside the chamber and partially inside the duct or enclosure to provide an enhanced sealing and increased static pressure handling capability. Other embodiments are described.
REFERENCES:
patent: 2056547 (1938-01-01), Weber
patent: 2123657 (1938-07-01), Munk
patent: 2142834 (1939-01-01), Bergstrom
patent: 2337954 (1943-12-01), Wolf
patent: 2369279 (1945-02-01), Carnaghan et al.
patent: 2439124 (1948-04-01), Bergstrom
patent: 2510561 (1950-06-01), Laval
patent: 2618435 (1952-11-01), Koch
patent: 2625319 (1953-01-01), Reisch
patent: 2628020 (1953-02-01), Koch
patent: 2876964 (1959-03-01), Streib
patent: 2922277 (1960-01-01), Bertin
patent: 2981464 (1961-04-01), Omohundro
patent: 3054578 (1962-09-01), Brocard
patent: 3129905 (1964-04-01), Taylor
patent: 3181811 (1965-05-01), Maksim
patent: 3289922 (1966-12-01), Sawyer
patent: 3489374 (1970-01-01), Morcom
patent: 3506219 (1970-04-01), Mouille et al.
patent: 3528382 (1970-09-01), Clark
patent: 3722454 (1973-03-01), Silvester
patent: 3738307 (1973-06-01), Jacobsen et al.
patent: 3742895 (1973-07-01), Horiuchi
patent: 3814538 (1974-06-01), Sjoqvist
patent: 3856238 (1974-12-01), Malvestuto
patent: 4031846 (1977-06-01), Tone
patent: 4152094 (1979-05-01), Honda et al.
patent: 4196877 (1980-04-01), Mutrux
patent: 4506849 (1988-03-01), Lemont
patent: 4637801 (1987-01-01), Schultz
patent: 4666411 (1987-05-01), Silvester
patent: 4689026 (1987-08-01), Small
patent: 4694645 (1987-09-01), Flyborg et al.
patent: 4815995 (1989-03-01), Ingvason
patent: 5292088 (1994-03-01), Lemont
H. E. Lemont, Design for Operating Environment Ring-Fin Tail Rotor Program, presented at the American Helicopter Society, Mideast Region, Oct. 22-24, 1980.
H. E. Lemont, Ringfin Augmentation Effects, presented at the 38th Annual Forum of the American Helicopter Society, May, 1982.
Lemont Andrew I.
Lemont Harold E.
Larson James A.
Lemont Aircraft Corporation
Look Edward K.
LandOfFree
Propulsive thrust ring system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Propulsive thrust ring system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Propulsive thrust ring system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-844411