Rotary shafts – gudgeons – housings – and flexible couplings for ro – Having lubricating means – For coupling having torque transmitted via radially directed...
Reexamination Certificate
2006-11-28
2006-11-28
Binda, Greg (Department: 3679)
Rotary shafts, gudgeons, housings, and flexible couplings for ro
Having lubricating means
For coupling having torque transmitted via radially directed...
Reexamination Certificate
active
07140965
ABSTRACT:
A cross for use in a universal joint includes a lubrication system for positively causing lubricant to flow into the region of the bearings contained within a bearing cup mounted on the trunnion. The lubrication system includes a pump that is disposed in the lubrication passageway formed in the trunnion of the cross. In a first embodiment, the pump is embodied as a reciprocating piston pump, including a hollow cylindrical housing having a piston slidably supported therein. When the cross is rotated during use, the piston is moved radially outwardly relative to the housing, thereby injecting a quantity of lubricant from the lubricant passageway into the region of the bearings. When the cross is ceased to be rotated, the piston is moved radially outwardly relative to the housing under the urging of a spring. In a second embodiment, the pump is embodied as a rotatable auger pump. When the bearing cup rotates back and forth relative to the trunnion during use, the auger is rotated relative to the housing, thereby causing lubricant to be pumped from the lubricant passageway into the region of the bearings.
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Binda Greg
MacMillan Sobanski & Todd LLC
Torque-Traction Technologies LLC
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