Gear assembly with spiral gears
First Claim
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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, anda 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.
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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
24 Claims
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1. 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 are coupled to define the first chamber and the second chamber within the housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A door assembly, comprising:
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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. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A door assembly, comprising:
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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. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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Specification