Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
131 words
An electrical motor comprising: (a) a rotor magnet rotatably supported and having a plurality of N and S poles alternately arranged circumferentially, each of said N and S poles having a plurality of convex and concave portions successively and alternately arranged, said convex and concave portions in each of said poles having a phase which is shifted by a half cycle in the circumferential direction from the phase of the convex and concave portions of adjacent poles; (b) a stator coil secured to oppose said rotor magnet; and (c) a wave-like conductor pattern secured so as to face said convex and concave portions of said rotor magnet, the length of one cycle in said wave-like conductor pattern being equal to the length of one cycle of said convex and concave portions.
Claim 2
Dependent Claim
131 words
An electrical motor comprising: (a) a rotor magnet rotatably supported and having a plurality of N and S poles alternately arranged circumferentially, each of said N and S poles having a plurality of convex and concave portions successively and alternately arranged, said convex and concave portions in each of said poles having a phase which is shifted by a half cycle in the circumferential direction from the phase of the convex and concave portions of adjacent poles; (b) a stator coil secured to oppose said rotor magnet; and (c) a wave-like conductor pattern secured so as to face said convex and concave portions of said rotor magnet, the length of one cycle in said wave-like conductor pattern being equal to the length of one cycle of said convex and concave portions.
Claim 3
Dependent Claim
15 words
An electrical motor as claimed in claim 1, wherein said rotor magnet is substantially flat.
Claim 4
Dependent Claim
26 words
An electrical motor as claimed in claim 1 or 2, wherein said convex and concave portions are formed at the outer periphery of said rotor magnet.
Claim 5
Dependent Claim
26 words
An electrical motor as claimed in claim 1 or 2, wherein said convex and concave portions are formed at the inner periphery of said rotor magnet.
Claim 6
Dependent Claim
30 words
An electrical motor as claimed in claim 1 or 2, wherein said convex and concave portions are formed at a portion between inner and outer peripheries of said rotor magnet.
Claim 7
Dependent Claim
25 words
An electrical motor as claimed in claim 2 or 3, wherein said convex and concave portions are formed on one surface of said rotor magnet.
Claim 8
Dependent Claim
26 words
An electrical motor as claimed in any one of claims 1 to 6, wherein said wave-like conductor pattern is formed on a flat printed circuit board.
Claim 9
Dependent Claim
41 words
An electrical motor as claimed in any one of claims 1 to 6, wherein said wave-like conductor pattern is formed on a flexible printed circuit board which is cylindrically curved so as to surround the outer periphery of said rotor magnet.
Claim 10
Dependent Claim
34 words
An electrical motor as claimed in claim 8, wherein said rotor magnet is generally cylindrical and said convex and concave portions are formed at one end on the outer periphery of said rotor magnet.
Claim 11
Dependent Claim
57 words
An electrical motor as claimed in any one of claims 1 to 9, further comprising a radial groove or slit made in said rotor magnet, and an additional conductor pattern arranged to oppose said groove or slit, said additional conductor pattern having a width and length which are substantially equal to those of said groove or slit.
Claim 12
Dependent Claim
24 words
An electrical motor as claimed in claim 10, wherein said rotor magnet is flat to have said groove or slit on its one surface.
Claim 13
Dependent Claim
27 words
An electrical motor as claimed in claim 11, wherein said groove or slit is longer than the radial length of each of said convex and concave portions.
Claim 14
Dependent Claim
28 words
An electrical motor as claimed in claim 11, wherein said rotor magnet is annular and said groove extends from inner periphery to outer periphery of said rotor magnet.