US3988942A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated gear
Assignee: Roland Offsetmaschinenfabrik Faber and Schleicher AG
•
Filing: 1975-04-28
•
Granted: 1976-11-02
•
Expires: 1995-04-28
Abstract
Abstract A spur gear formed of a laminated stack of axially thin spur gear elements having straight axially extending teeth identical involute tooth profiles and with means for securing them together in coaxial relation with stepped increments of phase between them producing a gear having a helical tooth pattern distinguished by the smoothness and lack of vibration of a helical gear while nevertheless avoiding the end thrust problems and the variations in phase which can occur with helical gearing.
Inventors
- 👤 Harry M. Greiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:23
CPC Classifications
F; F16; F16H; F16H55/00; F16H55/02; F16H55/17; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49462; Y10T29/49464; Y10T74/00; Y10T74/19; Y10T74/1987; Y10T74/19893; Y10T74/19916
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
39 words
A spur gear comprising a laminated stack of axially thin identically-profiled spur gear elements having straight axially-extending teeth of involute form and means for securing them flatly together in coaxial relation with stepped increments of angular phasing between them.
Claim 2
Dependent Claim
39 words
A spur gear comprising a laminated stack of axially thin identically-profiled spur gear elements having straight axially-extending teeth of involute form and means for securing them flatly together in coaxial relation with stepped increments of angular phasing between them.
Claim 3
Dependent Claim
46 words
A spur gear comprising a laminated stack of axially thin identically-profiled spur gear elements having straight axially-extending teeth of involute form and means for securing them flatly together in coaxial relation with equally stepped increments of angular phasing in the same direction between adjacent gear elements.
Claim 4
Dependent Claim
46 words
A spur gear comprising a laminated stack of axially thin identically-profiled spur gear elements having straight axially-extending teeth of involute form and means for securing them flatly together in coaxial relation with equally stepped increments of angular phasing in the same direction between adjacent gear elements.
Claim 5
Dependent Claim
49 words
A spur gear comprising a laminated stack of axially thin identically-profiled spur gear elements having straight axially-extending teeth of involute form and means for securing them flatly together in coaxial relation with incremental steps of angular offset in opposite directions on each side of center in a herringbone pattern.
Claim 6
Dependent Claim
49 words
A spur gear comprising a laminated stack of axially thin identically-profiled spur gear elements having straight axially-extending teeth of involute form and means for securing them flatly together in coaxial relation with incremental steps of angular offset in opposite directions on each side of center in a herringbone pattern.
Claim 7
Dependent Claim
49 words
The combination as claimed in claim 1 in which the increments of angular phasing are substantially equal to 360°/nt where n is the number of laminations and t is the number of teeth so that the action of gear elements is spread evenly and symmetrically over each tooth sector.
Claim 8
Dependent Claim
49 words
The combination as claimed in claim 1 in which the gear elements at the end of the stack are thicker than the remaining elements, and means for applying inward clamping pressure to the end elements for keeping all of the elements clamped tightly together in predetermined relative phase positions.
Claim 9
Dependent Claim
33 words
The combination as claimed in claim 1 in which the gear elements are provided with at least one set of registering openings adjacent the periphery, the openings being engaged by a clamping bolt.
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) | 1979-11-02 | 1980-05-03 | 1980-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-02 | 1984-05-03 | 1984-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-02 | 1988-05-03 | 1988-11-02 | $7700.00 | Window Closed / Lapsed |