US3952418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Master gear for checking tooth contact
Assignee: Toyota Motor Corp
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Filing: 1975-01-30
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Granted: 1976-04-27
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Expires: 1995-01-30
Abstract
Abstract Master gear for checking tooth contact characterized by the fact that all or part of its contact surface is made of an insulating material and two sets of conductive detectors are regularly arranged on said tooth contact surface one of which extends parallel to and the other perpendicular to the flat sides of the tooth.
Inventors
- 👤 Toshiaki Akamatsu
- 👤 Masahiko Yasugi
- 👤 Mitsuyuki Bito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:40
CPC Classifications
G; G01; G01B; G01B7/00; G01B7/28; G01B7/283; G01M; G01M13/00; G01M13/02; G01M13/021
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
66 words
Master gear for checking tooth contact comprising: a. at least one terminal tooth, b. insulating layers provided on the contact surfaces of said terminal tooth, and c. a plurality of conductive detectors which are embedded at regular intervals in said insulating layers some of which extend in a direction parallel and others of which extend in a direction perpendicular to the flat sides of said tooth.
Claim 2
Dependent Claim
66 words
Master gear for checking tooth contact comprising: a. at least one terminal tooth, b. insulating layers provided on the contact surfaces of said terminal tooth, and c. a plurality of conductive detectors which are embedded at regular intervals in said insulating layers some of which extend in a direction parallel and others of which extend in a direction perpendicular to the flat sides of said tooth.
Claim 3
Dependent Claim
39 words
Master gear for checking tooth contact as claimed in claim 1, wherein said insulating layers consist of a plurality of narrow, laminated insulator strips arranged on said contact surfaces and said conductive detectors are bonded to said contact surfaces.
Claim 4
Dependent Claim
57 words
Master gear for checking tooth contact as claimed in claim 1, wherein said insulating layer consists of a single insulator plate upon which a plurality of conductive detectors are regularly arranged and extend in a direction parallel and a direction perpendicular to the flat sides of the tooth, the conductive detectors being bonded to the tooth surface.
Claim 5
Dependent Claim
43 words
Master gear for checking tooth contact as claimed in claim 1, wherein a plurality of conductive detectors are regularly arranged directly on the contact surface of the tooth and an insulating layer of synthetic resin is applied to said surface between said detectors.
Claim 6
Dependent Claim
26 words
Master gear for checking tooth contact as claimed in claim 1, wherein separately produced terminal teeth for checking tooth contact are embedded in the gear body.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-27 | 1979-10-27 | 1980-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-27 | 1983-10-27 | 1984-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-27 | 1987-10-27 | 1988-04-27 | $7700.00 | Window Closed / Lapsed |