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US 5,667,311 AGranted
Pivot shaft for a damper assembly
OwnerWalter Maersinventor
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OwnerWalter Maersinventor
Estimating the term…
A pivot shaft for a damper assembly includes a steel cylinder having a reduced diameter end, a brass sleeve bearing rotatably mounted on the reduced diameter end and a steel cap press fit over the bearing thereby enclosing it and protecting it from the environment. The area enclosed by the steel cap is preferably lubricated with grease before the cap is pressed onto the bearing. The possibility of galling is prevented by the use of a brass bearing between two steel members. The steel cap protects the lubricated bearing from dust and dirt. According to a first embodiment, the sleeve bearing and cap are provided at one end of the pivot shaft. With this embodiment, a closed end bushing is also provided which ensures that only the cap of the pivot shaft engages the bushing. According to a second embodiment, a first solid steel cylinder is provided with two reduced diameter portions, one at each end. A brass sleeve bearing is placed on each reduced diameter portion and retaining clips are attached to hold each sleeve bearing onto its respective reduced diameter portion. A second and third steel cylinders are provided, each having a bearing receiving bore in one end. The bored ends of the second and third steel cylinders are press fit over respective brass sleeve bearings. The resulting pivot shaft has three independently rotatable portions. In an alternate embodiment, the second and third cylinders are rigidly fixed together to thereby rotate together in tandem.
A pivot shaft for use in a ventilation damper assembly, comprising:
A pivot shaft for use in a ventilation damper assembly, comprising:
A pivot shaft in combination with a ventilation damper assembly, said pivot shaft comprising:
A pivot shaft in combination with a ventilation damper assembly, said pivot shaft comprising:
Dependencies are inferred from the claim text.