Fluid reaction surfaces (i.e. – impellers) – Articulated – resiliently mounted or self-shifting impeller... – Plural articulation
Patent
1976-12-16
1978-09-05
Powell, Jr., Everette A.
Fluid reaction surfaces (i.e., impellers)
Articulated, resiliently mounted or self-shifting impeller...
Plural articulation
416138, B64C 2738
Patent
active
041116054
ABSTRACT:
Each rotor blade is rigidly affixed to a pair of strap members which are also rigidly connected to a rotor hub. Each strap member is defined as an elongated open box beam of rectangular cross section. Each strap member has its open web located on the side of the rectangle opposite that of its associated strap member of a pair. A pitch shaft which is located intermediate the two strap members associated with the given rotor blade, is rigidly attached to that rotor blade, and is rotatably connected with respect to the rotor hub. In alternative configurations, the strap members are configured as various alternative solid or open web designs, but all are configured as pairs having a pitch shaft therebetween.
REFERENCES:
patent: 2757745 (1956-08-01), Verhage et al.
patent: 2845131 (1958-07-01), Laufer
patent: 3261407 (1966-07-01), Culver et al.
patent: 3330362 (1967-07-01), Kostan
patent: 3667863 (1972-06-01), Breuner
patent: 3695779 (1972-10-01), Kastan et al.
patent: 3797964 (1974-03-01), Hanson
patent: 3865511 (1975-02-01), Breuner
patent: 3879153 (1975-04-01), Breuner
Roman Stephan
Spitko Richard J.
Powell Jr. Everette A.
The Boeing Company
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