Harvesters – Cutting – Cutter members
Patent
1978-01-13
1980-07-29
Mancene, Louis G.
Harvesters
Cutting
Cutter members
56 175, A01D 5518
Patent
active
042144264
ABSTRACT:
A rotary cutting device, primarily for grass mowers, includes a number of blade elements for cutting or air propelling purposes. To reduce noise, the rotating blades are provided with substantially flat leading and trailing edge portions formed along a major part of the leading edge and trailing edge, respectively, of the blade, cross sections of the leading edge flat portion being parallel to corresponding cross sections of the trailing edge flat portion and being connected thereto by an intermediate portion merging by smooth roundings into the respective flat portions, the cross sections being in respective cutting planes parallel to the axis of rotation and perpendicular to the longitudinal direction of the blade, such that the airflow past the blade follows the blade smoothly and shedded vortices are limited substantially to a relatively small cross-sectional area immediately following the trailing edge of the blade.
REFERENCES:
patent: 2484511 (1949-10-01), Ingalls
patent: 2908128 (1959-10-01), Mauro
patent: 3035359 (1962-05-01), Ewert
patent: 3078573 (1963-02-01), Kern
patent: 3080697 (1963-03-01), Mauro
patent: 3191371 (1965-06-01), Brewer
patent: 3320733 (1967-05-01), Kirk
patent: 3327460 (1967-06-01), Blackstone
patent: 3690051 (1972-09-01), Wood
patent: 3717985 (1973-02-01), Freelander et al.
Hirsch Paul J.
Mancene Louis G.
Stiga AB
LandOfFree
Noise damping arrangement in rotating cutting devices does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Noise damping arrangement in rotating cutting devices, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Noise damping arrangement in rotating cutting devices will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-898988