Patent EP0213732A1 successfully refreshed from Google Patents.
EP0213732A1
Expired / Lapsed
EP
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Magnetic ring for detecting the rotation of an object
Assignee: Honda Motor Co Ltd
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Filing: 1986-07-25
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Granted: —
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Expires: 2006-07-25
Abstract
Abstract A ring (1, 1') to be attached to a rotary body (42) for producing a magnetic signal in cooperation with a magnetic sensor (38) relative to which the rotary body rotates, comprising: a magnetic ring member (2, 12, 22, 32) having an alternating magnetic property around a circumference thereof and made of synthetic resin in which magnetic material is dispersed; and a reinforcing ring member (3, 13, 23, 33) which is made of synthetic resin material and is substantially circumferentially coextensive with the magnetic ring member. Alternatively, the reinforcing ring may consist of a metallic band (24) which extends around the circumference of the ring. By thus reinforcing the resinous magnetic material, the cost of the ring can be reduced on the one hand and the increased mechanical strength of the ring allows easy handling and effective press fitting of the ring on the other hand. By forming the ring as a plurality of arcuate segment portions (2a, 2b 3a, 3b, 12a, 12b, 13a, 13b, 22a, 22b, 23a, 23b, 32a, 32b, 33a, 33b) the stocking and installing of the ring is facilitated.
Inventors
- 👤 Kenji Hattori
- 👤 Hiroshi Tanaka
- 👤 Shinichi Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 06:04
CPC Classifications
G; G01; G01P; G01P3/00; G01P3/42; G01P3/44; G01P3/48; G01P3/481; G01P3/487; G01P1/00; H; H01; H01F; H01F7/00; H01F7/02; H01F7/0205; H01F7/0221
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
86 words
A ring (1, 1') to be attached to a rotary body (42) for producing a magnetic signal in cooperation with a magnetic sensor (38) relative to which the rotary body rotates, comprising: a magnetic ring member (2, 12, 22, 32) having an alternating magnetic property around a circumference thereof and made of synthetic resin in which magnetic material is dispersed; and a reinforcing ring member (3, 13, 23, 33) which is made of synthetic resin material and is substantially circumferentially coextensive with the magnetic ring member.
Claim 2
Dependent Claim
86 words
A ring (1, 1') to be attached to a rotary body (42) for producing a magnetic signal in cooperation with a magnetic sensor (38) relative to which the rotary body rotates, comprising: a magnetic ring member (2, 12, 22, 32) having an alternating magnetic property around a circumference thereof and made of synthetic resin in which magnetic material is dispersed; and a reinforcing ring member (3, 13, 23, 33) which is made of synthetic resin material and is substantially circumferentially coextensive with the magnetic ring member.
Claim 3
Dependent Claim
25 words
A ring as claimed in claim 1, wherein the magnetic ring member (2, 22) is magnetized to have alternating magnetic poles around its said circumference.
Claim 4
Dependent Claim
27 words
A ring as claimed in claim 1, wherein the magnetic ring member (12, 32) is provided with a plurality of teeth (12a, 32c) around its said circumference.
Claim 5
Dependent Claim
36 words
A ring as claimed in any of claims 1 to 3, wherein the magnetic ring member (2, 12, 22, 32) is embedded in the reinforcing ring member (3, 13, 23, 33) in a partially exposed state.
Claim 6
Dependent Claim
28 words
A ring as claimed in claim 4, which is further reinforced by a metallic ring (4, 14, 24) which covers the exposed surface of the magnetic ring member.
Claim 7
Dependent Claim
28 words
A ring as claimed in any of claims 1 to 3, wherein the magnetic ring member (2, 12) is wholly enclosed in the reinforcing ring member (3, 13).
Claim 8
Dependent Claim
51 words
A ring as claimed in any of claims 1 to 3, wherein the reinforcing ring member (3, 13, 23, 33) comprises a main body and an extension (3a, 13a, 23a, 33a), the main body carrying the magnetic ring member while the extension is adapted to be fitted to the rotary body.
Claim 9
Dependent Claim
33 words
A ring as claimed in any of claims 1 to 3, wherein the magnetic ring member is embedded in the reinforcing ring member with a buffer member (5, 15, 25, 35) interposed therebetween.
Claim 10
Dependent Claim
28 words
A ring as claimed in any preceding claim, wherein a circumferential surface (37) of the ring for attachment to the rotary body is shaped as a polygonal surface.
Claim 11
Dependent Claim
86 words
A ring (1, 1') to be attached to a rotary body (42) for producing a magnetic signal in cooperation with a magnetic sensor (38) relative to which the rotary body rotates, comprising: a magnetic ring member (2, 12, 22, 32) having an alternating magnetic property around a circumference thereof and made of synthetic resin in which magnetic material is dispersed; and a reinforcing ring member (4, 14, 24) which is made of metal or alloy material and is substantially circumferentially coextensive with the magnetic ring member.
Claim 12
Dependent Claim
86 words
A ring (1, 1') to be attached to a rotary body (42) for producing a magnetic signal in cooperation with a magnetic sensor (38) relative to which the rotary body rotates, comprising: a magnetic ring member (2, 12, 22, 32) having an alternating magnetic property around a circumference thereof and made of synthetic resin in which magnetic material is dispersed; and a reinforcing ring member (4, 14, 24) which is made of metal or alloy material and is substantially circumferentially coextensive with the magnetic ring member.
Claim 13
Dependent Claim
25 words
A ring as claimed in claim 10, wherein the magnetic ring member (2, 24) is magnetized to have alternating magnetic poles around its said circumference.
Claim 14
Dependent Claim
27 words
A ring as claimed in claim 10, wherein the magnetic ring member (12, 33) is provided with a plurality of teeth (12a, 32c) around its said circumference.
Claim 15
Dependent Claim
25 words
A ring as claimed in any preceding claim, wherein at least one of said ring members is made up of a plurality of arcuate segments.
Claim 16
Dependent Claim
92 words
A ring (1, 1') to be attached to a rotary body (42) for producing a magnetic signal in cooperation with a magnetic sensor (38) relative to which the rotary body rotates, comprising: a magnetic ring member (22, 32) having an alternating magnetic property around a circumference thereof and which comprises at least two arcuate segments (22a, 22b, 32a, 32b) forming a complete circle through mutual cooperation therebetween, and made of synthetic resin in which magnetic material is dispersed; and fastening means (24, 36) holding the arcuate segments together as a complete ring.
Claim 17
Dependent Claim
92 words
A ring (1, 1') to be attached to a rotary body (42) for producing a magnetic signal in cooperation with a magnetic sensor (38) relative to which the rotary body rotates, comprising: a magnetic ring member (22, 32) having an alternating magnetic property around a circumference thereof and which comprises at least two arcuate segments (22a, 22b, 32a, 32b) forming a complete circle through mutual cooperation therebetween, and made of synthetic resin in which magnetic material is dispersed; and fastening means (24, 36) holding the arcuate segments together as a complete ring.
Claim 18
Dependent Claim
29 words
A ring as claimed in claim 14, wherein the said fastening mean comprises a reinforcing ring (24) which extends wholly around a circumferential surface of the magnetic ring member.
Claim 19
Dependent Claim
40 words
A ring as claimed in claim 14 or 15, wherein the magnetic ring member is reinforced by reinforcing arcuate segment members (23a, 23b, 33a, 33b) made of synthetic resin which substantially surround the arcuate segments of the magnetic ring member.
Claim 20
Dependent Claim
85 words
A ring as claimed in claim 16, wherein each of the said reinforcing arcuate segment members (23a, 23b, 33a, 33b) comprises a main body and an extension (23c, 33c) each of which forms a part of a complete circle, and the arcuate segments of the magnetic ring member (22a, 22b, 32a, 32b) are embedded in the main bodies of the reinforcing arcuate segment members, while the said fastening means (24) extends around a circumferential surface of the said extensions of the reinforcing arcuate segment members.
References Cited (Backward Citations)
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