Boots – shoes – and leggings
Patent
1994-11-18
1997-03-04
Teska, Kevin J.
Boots, shoes, and leggings
G06F 9455, G06F 1750
Patent
active
056086482
ABSTRACT:
Computer generated refined profiles for a pair of cooperating screw motors includes an initial profile for a female rotor and for a male rotor. The initial profiles are refined using an iterative procedure, and the female profile includes a groove having a leading flank comprising a generally circular arc connected to points which are developed by the iterative procedure to produce minimum clearances between these points and critical male points, such as the male tip and male root. The initial male profile is refined using the iterative procedure, and includes a surface generated to minimize the clearance with meshing female surfaces. The refined profiles, and a helix angle are used to define rotors having surfaces with pitch diameters located near a male root, thereby eliminating the "blow hole" leak and minimizing leak at the points where the female tip meshes near the male root.
REFERENCES:
patent: 5297054 (1994-03-01), Kienzle et al.
patent: 5297057 (1994-03-01), Kramer et al.
patent: 5453934 (1995-09-01), Taghavi et al.
patent: 5455778 (1995-10-01), Ide et al.
Loppnow Matthew
Teska Kevin J.
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