Tapered shaft retention apparatus

Patent 4629354 Issued on December 16, 1986. Estimated Expiration Date:

October 18, 2005. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

2472742

3019039

3062743

3333899

3413022

3718957

Marine gear assembly
Patent #: 3952606
Issued on: 04/27/1976
Inventor: Schulz

Multiple bearing adjusting device
Patent #: 4025136
Issued on: 05/24/1977
Inventor: Ballendux

Clamping split lock nut Patent #: 4033394
Issued on: 07/05/1977
Inventor: Capuano

Inventor

Freese, John D.

Assignee

Caterpillar Inc.

Application

No. 06/789263 filed on 10/18/1985

US Classes:

403/261, Coaxial collar or shoulder or rod is clamp element29/447, By temperature differential (e.g., shrink fit)29/525, By driven force fit403/16, Back-off means, e.g., separator, etc.403/259, Between rod shoulder and terminal nut403/273, SHRUNK FIT411/278With discrete means carried by the element for producing the distortion

Examiners

Primary: Callaghan, Thomas F.
Assistant: Fischetti, Joseph A.

Attorney, Agent or Firm

Lanchantin, Jr.; Charles E.

International Classes

F16D 1/091 (20060101)
F16C 35/063 (20060101)
F16C 35/04 (20060101)
F16D 1/06 (20060101)
F16D 1/092 (20060101)

Abstract

A tapered shaft retention apparatus is used with a shaft having a shoulder, a cylindrical surface, a smooth conically tapered surface, and an annular member such as an inner race of a bearing assembly mounted on the cylindrical surface. A sleeve is mounted on the shaft with an adjustment nut screwthreadably mounted thereon, and an internally tapered hub is mounted on the tapered surface in abutment with the nut with a preselected press fit. This assures the transmission of torque through the hub and positions the bearing assembly on the shaft. During assembly the hub is initially installed at an ambient temperature and the adjustment nut set at a preselected clearance therefrom, the hub is then removed and thermally expanded and reinstalled in abutment with the nut to establish the desired press fit.