Protective cover and gear assembly

Patent metadata

Field	Value
Publication number	US-2018340598-A1
Application number	US-201615771645-A
Country	US
Kind code	A1
Filing date	Oct 19, 2016
Priority date	Oct 28, 2015
Publication date	Nov 29, 2018
Grant date	—

Abstract

A protective cover is disclosed for teeth of a gear body. The protective cover includes a desiccant disposed in a polymer enclosure. A method of protecting a gear is disclosed. The method involves generating a digital model of a protective cover having a surface portion that matches a surface contour of the gear teeth and inputting the digital model into an additive manufacturing apparatus or system. A protective cover is formed by repeatedly applying energy from an energy source to fuse successively applied incremental quantities of a polymer corresponding to the digital model of the protective cover, and the gear teeth are covered with the surface portion of the protective cover that matches the surface contour of the gear teeth.

First claim

1 . A protective cover for a gear body comprising gear teeth, comprising a desiccant disposed in a polymer enclosure.

2 . The protective cover of claim 1 , wherein the gear teeth surfaces define a negative space surrounding the gear teeth, said negative space occupied by the polymer enclosure.

3 . The protective cover of claim 1 , wherein the polymer enclosure comprises a polymer shell, and the desiccant is disposed within the polymer shell.

4 . The protective cover of claim 3 , wherein the polymer enclosure further comprises a polymer support structure within the polymer shell.

5 . The protective cover of claim 4 , wherein the polymer support structure comprises a honeycomb structure, a columnar structure, or a diagonal structure.

6 . The protective cover of claim 3 , wherein the polymer shell comprises a porous portion covering the gear teeth.

7 . The protective cover of claim 6 , wherein the polymer shell porous portion comprises polymer strands or strips configured in a pattern with openings between the strands or strips.

8 . The protective cover of claim 7 , wherein the desiccant comprises desiccant particles larger than said openings.

9 . The protective cover of claim 1 , wherein the polymer enclosure comprises a polymer foam, and the desiccant is disposed within cells in the polymer foam.

10 . The protective cover of claim 9 , wherein the polymer foam is an open-cell polymer foam.

11 . The protective cover of claim 1 , further comprising an indicator of moisture retention by the desiccant.

12 . The protective cover of claim 1 , further comprising identification for process tracking.

13 . A gear assembly, comprising
a gear body comprising gear teeth; and a removable protective cover according to claim 1 covering the gear teeth.

14 . A method of protecting a gear body comprising gear teeth, the method comprising:
generating a digital model of a protective cover having a surface portion that matches a surface contour of the gear teeth; inputting the digital model into an additive manufacturing apparatus or system comprising an energy source; forming the protective cover by repeatedly applying energy from the energy source to fuse successively applied incremental quantities of a polymer corresponding to the digital model of the protective cover; and covering the gear teeth with the surface portion of the protective cover that matches the surface contour of the gear teeth.

15 . The method of claim 14 , further comprising enclosing a desiccant within the protective cover.

16 . The method of claim 15 , wherein the digital model includes an exterior shell, and the desiccant is disposed within the exterior shell.

17 . The method of claim 16 , wherein the digital model includes a support structure within the exterior shell.

18 . The method of claim 17 , wherein the support structure comprises a honeycomb structure, a columnar structure, or a diagonal structure.

19 . The method of claim 14 , wherein the digital model includes a porous portion matching the surface contour of the gear teeth.

20 . The method of claim 19 , wherein the digital model of the porous portion includes strands or strips configured in a pattern with openings between the strands or strips.

21 . (canceled)

Assignees

• Sikorsky Aircraft Corp

Inventors

• Beisner John William
• Forrest Timothy

Classifications

• F16H37/00 Primary

  Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 (combinations of mechanical gearing with fluid clutches or fluid gearing F16H47/00) · CPC title

• B65D65/02 Primary

  Wrappers or flexible covers · CPC title

• B65D81/266

  for absorbing gases, e.g. oxygen absorbers or desiccants (B65D51/244, B65D51/30 take precedence) · CPC title

• B23F23/12

  Other devices, e.g. tool holders; Checking devices for controlling workpieces in machines for manufacturing gear teeth · CPC title