GEAR ASSEMBLY WITH SPIRAL GEARS
First Claim
Patent Images
1. A gear assembly, 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, anda fluid connection between a first chamber and a second chamber,wherein the first spiral gear and the second spiral gear couple to define the first chamber and the second chamber within the housing.
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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.
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Citations
50 Claims
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1. A gear assembly, comprising:
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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, wherein the first spiral gear and the second spiral gear couple to define the first chamber and the second chamber within the housing. - View Dependent Claims (2, 5, 6, 9, 10, 11, 12, 39, 42, 43)
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3-4. -4. (canceled)
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7-8. -8. (canceled)
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13. A door operator, for opening and closing a door, comprising:
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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 couple to define the first chamber and the second chamber within the housing. - View Dependent Claims (19, 21, 31, 32, 35, 38)
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14-18. -18. (canceled)
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20. (canceled)
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22. A door closer, for closing a door, comprising:
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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 couple to define the first chamber and the second chamber within the housing. - View Dependent Claims (30, 45)
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23-29. -29. (canceled)
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33-34. -34. (canceled)
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36-37. -37. (canceled)
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40-41. -41. (canceled)
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44. (canceled)
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46-47. -47. (canceled)
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48. A door operator, for opening or closing a door, comprising:
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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, an electric motor, coupled to the first gear shaft, wherein the first spiral gear is coupled to the second spiral gear. - View Dependent Claims (49)
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50. (canceled)
Specification