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US 8,757,198 B2Granted
Spring retaining sleeve
AssigneeRobert Bosch GmbH
InventorsAngelo Santamaria, Jochen Aleker
Life of this patent
Estimating the term…
Abstract
A spring retaining sleeve includes a cylinder press-fit connection surface which has a press-fit diameter and a press-fit length. To enable cost-effective production of a stable press-fit assembly, at least one end of the cylinder press-fit connection surface, an optimized insertion chamfer for long press-fit assemblies is provided with a ratio of press-fit diameter to press-fit length of greater than thirty five percent.
Claims6
A spring retaining sleeve, comprising:
- a cylinder press-fit connection surface which has a press-fit diameter and a press-fitting length;
- and
- an optimized insertion chamfer provided on at least one end of the cylinder press-fit connection surface, for long press-fit assemblies having a ratio of press-fit diameter to press-fitting length that is greater than 35 percent, wherein
- the insertion chamfer has an angle in a range from 18 to 22 degrees, and
- the cylinder press-fit connection surface has only a single annular lubrication groove substantially in a center of the cylinder press-fit connection surface forming a lubricant reservoir to dispense lubricant during a press-fitting operation.
2 more elements
Dependencies are inferred from the claim text.