Patent US4292857A successfully refreshed from Google Patents.
US4292857A
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Cylindrical gear with helical tooth wheels
Assignee: FABRYKA OBRABIAREK PRECYZYJNYCH PONAR PRUSZKOW ZAKLAD I MA
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Filing: 1978-09-25
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Granted: 1981-10-06
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Expires: 1998-09-25
Abstract
Abstract A cylindrical gear train comprising first and second gears having helical eth of different thickness with different pitch diameters for the left hand and right hand sides of the teeth and with different nominal angles of inclination and different mesh correction for the mating left hand and right hand flanks of the teeth. Within the normal module range of m n =2-6 mm, corresponding to the normal module range of 2π(mm) to 6π(mm), and for pitch diameters up to 500 mm, the maximum tooth convergency is 3° and the addendum modification coefficient does not exceed 0.8.
Inventors
- 👤 Zbigniew Matusz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:03
CPC Classifications
F; F16; F16H; F16H55/00; F16H55/02; F16H55/08; F16H1/00; F16H1/02; F16H1/04; F16H1/06; F16H1/08; F16H2055/0893; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19623; Y10T74/19949; Y10T74/19963; Y10T74/19972; Y10T74/19986
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
99 words
A gear train comprising first and second cylindrical gears having helical teeth, each tooth having left hand and right hand sides with respective different pitch diameters, the teeth of the first and second gears having different nominal angles of inclination and different mesh correction for the left hand and right hand mating flanks of conjugate teeth whereby within the normal module range of 2 to 6 mm, corresponding to the normal pitch range of 2π(mm) to 6π(mm), and pitch diameters up to 500 mm, tooth convergencies up to 3° are provided, the addendum modification coefficient value not exceeding 0.8.
Claim 2
Dependent Claim
99 words
A gear train comprising first and second cylindrical gears having helical teeth, each tooth having left hand and right hand sides with respective different pitch diameters, the teeth of the first and second gears having different nominal angles of inclination and different mesh correction for the left hand and right hand mating flanks of conjugate teeth whereby within the normal module range of 2 to 6 mm, corresponding to the normal pitch range of 2π(mm) to 6π(mm), and pitch diameters up to 500 mm, tooth convergencies up to 3° are provided, the addendum modification coefficient value not exceeding 0.8.
Claim 3
Dependent Claim
14 words
A gear train as claimed in claim 1 wherein said gears have different thickness.
Claim 4
Dependent Claim
31 words
A gear train as claimed in claim 2 wherein the addendum modification coefficient for one side of the tooth is positive and for the other side of the tooth is negative.
References Cited (Backward Citations)
US1772688A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-05 | 1985-04-06 | 1985-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-05 | 1989-04-06 | 1989-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-05 | 1993-04-06 | 1993-10-06 | $7700.00 | Window Closed / Lapsed |