Pinion Starter Gearing Having Corrected Gear Geometry
US-2018128232-A1 · May 10, 2018 · US
Gearwheel for clock movement
US10409222B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10409222-B2 |
| Application number | US-201715591533-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 10, 2017 |
| Priority date | May 12, 2016 |
| Publication date | Sep 10, 2019 |
| Grant date | Sep 10, 2019 |
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Abstract
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A gearwheel (R 2 ) for clock movement, suitable for cooperating with a given first gearwheel (R 1 ), wherein it comprises teeth whose flank is defined such that the torque ratio j between the two meshed gearwheels (R 1 , R 2 ) is constant at least over a given angular pitch.
First claim
Opening claim text (preview).
The invention claimed is: 1. A gear pair for clock movement, comprising: a given first gearwheel (R 1 ); a second gearwheel (R 2 ) suitable for cooperating with the given first gearwheel (R 1 ), wherein the second gearwheel (R 2 ) comprises teeth whose flank is defined so that the torque ratio j between the two gearwheels (R 1 , R 2 ) is constant at least over a given angular pitch, wherein a modulus m of the teeth of the first gearwheel (R 1 ) satisfies: 0.03<m<0.8. 2. The gear pair for clock movement as claimed in claim 1 , wherein the respective rotation axes (A 1 , A 2 ) of the two gearwheels (R 1 , R 2 ) are substantially parallel and wherein the two gearwheels (R 1 , R 2 ) constitute spur gears. 3. The gear pair for clock movement as claimed in claim 2 , wherein the flanks r 1 , r 2 of the teeth of the two gearwheels (R 1 , R 2 ) satisfy the following equations: 1 + i 1 + i _ = n x z 1 2 ( r ny n x - r nx n y ) and ( 5 ) 1 + j 1 + i _ = n x z 1 2 ( r ny n x - r nx n y ) - μ z 1 2 r 1 n ( sin ± μ cos ) r nx
Assignees
Inventors
Classifications
Numerical modelling · CPC title
Design optimisation, verification or simulation (optimisation, verification or simulation of circuit designs G06F30/30) · CPC title
with parallel axes · CPC title
Profiling · CPC title
- G04B13/02Primary
Wheels; Pinions; Spindles; Pivots (bearings G04B31/00 {; chain wheels, spindles for chain wheels, also chains and driving weights G04B1/08}) · CPC title
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- What does patent US10409222B2 cover?
- A gearwheel (R 2 ) for clock movement, suitable for cooperating with a given first gearwheel (R 1 ), wherein it comprises teeth whose flank is defined such that the torque ratio j between the two meshed gearwheels (R 1 , R 2 ) is constant at least over a given angular pitch.
- Who is the assignee on this patent?
- Rolex Sa
- What technology area does this patent fall under?
- Primary CPC classification G04B13/02. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Sep 10 2019 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).