Gear assembly with spiral gears

• US 9,651,130 B2
• Filed: 07/13/2015
• Issued: 05/16/2017
• Est. Priority Date: 07/30/2014
• Status: Active Grant

• Current Assignee: Td Ip Holdco, LLC
• Original Assignee: Td Ip Holdco, LLC
• Inventors: Yulkowski, Leon
• Primary Examiner(s): REDMAN, JERRY E
• Application Number:
  US14/797,565
• Publication Number:
  US 20160033024A1
• Time in Patent Office: 673 Days
• Field of Search: 49333, 49334, 49335, 49339, 49340, 49341, 49358
• CPC Class Codes: E05F 1/002 controlled by automatically acting means for powered-operated mechanisms E05F15/70
• CPC Class Codes: E05F 15/53 for swinging wings
• CPC Class Codes: E05F 3/102 with rack-and-pinion transmission between driving shaft and piston within the closer housing
• CPC Class Codes: E05Y 2201/618 Transmission ratio variation
• CPC Class Codes: E05Y 2201/716 Pinions
• CPC Class Codes: E05Y 2800/268 cylindrical; disc-shaped; circular
• CPC Class Codes: F16H 2035/003 Gearings comprising pulleys or toothed members of non-circular shape, e.g. elliptical gears harmonic drives with elliptical wave generators F16H49/001
• CPC Class Codes: F16H 47/02 the fluid gearing being of the volumetric type

Abstract

A gear assembly comprises a housing, a first gear shaft in the housing, a first spiral gear coupled to the first gear shaft in the housing, a second gear shaft in the housing, a second spiral gear coupled to the second gear shaft in the housing, and a fluid connection between a first chamber and a second chamber. The first spiral gear and the second spiral gear couple to define the first chamber and the second chamber within the housing.

Claims

1. A door closer, for closing a door, comprising:

a housing,

a first gear shaft, in the housing,

a first spiral gear coupled to the first gear shaft, in the housing,

a second gear shaft, in the housing,

a second spiral gear coupled to the second gear shaft, in the housing,

a fluid connection between a first chamber and a second chamber, and

a torsion spring, coupled to the second spiral gear shaft,

wherein the first spiral gear and the second spiral gear are coupled to define the first chamber and the second chamber within the housing.

2. The door closer of claim 1, further comprising a first bearing, coupled to the first gear shaft, and a second bearing, coupled to the second gear shaft,

wherein the first and second spiral gears are substantially identical,

the first spiral gear includes a first gear valve,

the second spiral gear includes a second gear valve,

the first spiral gear and the first gear shaft form a first monolithic component, and

the second spiral gear and the second gear shaft form a second monolithic component.

3. The door closer of claim 1, wherein the first and second spiral gears are substantially identical.

4. The door closer of claim 1, further comprising a fluid connection valve along the fluid connection.

5. The door closer of claim 1, further comprising a first bearing, coupled to the first gear shaft, and a second bearing, coupled to the second gear shaft.

6. The door closer of claim 1, wherein the first spiral gear and the first gear shaft form a first monolithic component, and

the second spiral gear and the second gear shaft form a second monolithic component.

7. The door closer of claim 1, wherein the first spiral gear includes a first gear valve comprising a ball, and

the second spiral gear includes a second gear valve comprising a ball and a spring.

8. A door assembly, comprising:

a door, and

the door operator of claim 1,

wherein the door is coupled to the first spiral gear.

9. The door assembly of claim 8, wherein the door closer is located within the door.

10. A door assembly, comprising:

a door, and

a door operator, comprising

a housing,

a first gear shaft, in the housing,

a first spiral gear coupled to the first gear shaft, in the housing,

a second gear shaft, in the housing,

a second spiral gear coupled to the second gear shaft, in the housing,

a fluid connection between a first chamber and a second chamber, and

a hydraulic pump, in fluid connection with the first chamber and the second chamber,

wherein the first spiral gear and the second spiral gear are coupled to define the first chamber and the second chamber within the housing, and

the door is coupled to the first spiral gear.

11. The door assembly of claim 10, wherein the door operator further comprises an output shaft, coupled to the door and either the first gear shaft or the second gear shaft.

12. The door assembly of claim 10, wherein the door operator further comprises a first bearing, coupled to the first gear shaft, and a second bearing, coupled to the second gear shaft,

wherein the first and second spiral gears are substantially identical,

the first spiral gear includes a first gear valve,

the second spiral gear includes a second gear valve,

the first spiral gear and the first gear shaft form a first monolithic component, and

the second spiral gear and the second gear shaft form a second monolithic component.

13. The door assembly of claim 10, wherein the door operator is located within the door.

14. The door assembly of claim 10, wherein the first and second spiral gears are substantially identical.

15. The door assembly of claim 10, wherein the door operator further comprises a fluid connection valve along the fluid connection.

16. The door assembly of claim 10, wherein the door operator further comprises a first bearing, coupled to the first gear shaft, and a second bearing, coupled to the second gear shaft.

17. The door assembly of claim 10, wherein the first spiral gear and the first gear shaft form a first monolithic component, and

the second spiral gear and the second gear shaft form a second monolithic component.

18. A door assembly, comprising:

a door, and

a door operator, comprising

a first gear shaft,

a first spiral gear, coupled to the first gear shaft,

a second gear shaft,

a second spiral gear, coupled to the second gear shaft, and

an electric motor, coupled to the first gear shaft,

wherein the first spiral gear is coupled to the second spiral gear, and

the door is coupled to the first spiral gear.

19. The door assembly of claim 18, wherein the first and second spiral gears are substantially identical.

20. The door assembly of claim 18, wherein the door operator further comprises a first bearing, coupled to the first gear shaft, and a second bearing, coupled to the second gear shaft.

21. The door assembly of claim 18, wherein the door operator further comprises an output shaft, coupled to the door and the first gear shaft.

22. The door assembly of claim 18, wherein the first spiral gear and the first gear shaft form a first monolithic component, and

the second spiral gear and the second gear shaft form a second monolithic component.

23. The door assembly of claim 18, wherein the door operator further comprises a first bearing, coupled to the first gear shaft, and a second bearing, coupled to the second gear shaft,

the first and second spiral gears are substantially identical,

the first spiral gear and the first gear shaft form a first monolithic component, and

the second spiral gear and the second gear shaft form a second monolithic component.

24. The door assembly of claim 18, wherein the door operator is located within the door.