US3740829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a cam shaft with a shaft coupling and article produced thereby
Assignee: Individual
•
Filing: 1971-10-15
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Granted: 1973-06-26
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Expires: 1991-10-15
Abstract
Abstract A method of making a cam shaft having a trunnion at one end of the cam and a blind end shaft coupling internally of the trunnion for connection to an external shaft wherein a coupling member is formed with a cylindrical outer bearing surface and an internally keyed bore extending therethrough dimensioned for connection to an external keyed shaft, a cam member is formed with a shaft stub extending from one end face eccentric to its peripheral cam surface, and the coupling is thereafter assembled on the shaft stub and brazed to the end face of the cam to form a trunnion at the end of the cam having a blind end shaft coupling internally of the trunnion.
Inventors
- 👤 D Yarger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:54
CPC Classifications
B; B23; B23K; B23K1/00; B23K1/0008; F; F04; F04B; F04B9/00; F04B9/02; F04B9/04; F04B9/045; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2101; Y10T74/2173; Y10T74/2174; Y10T74/2175
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
219 words
A method of making a cam shaft having a trunnion at one end of a cam and a blind end shaft coupling internally of the trunnion for connection to an external shaft comprising: forming a shaft coupling having an axial bore and an internal keyway extending therethrough and dimensioned to have a working clearance with a keyed end of an external shaft, and forming a smooth cylindrical outer bearing surface on the shaft coupling coaxial with the bore; forming a cam with a peripheral cam surface, a cam end face at one end of the cam surface, and a shaft stub extending from the cam end face eccentric to the peripheral cam surface and having a diameter to tightly fit in the coupling bore and a length which is short as compared to its diameter and substantially shorter than the coupling; assembling the coupling onto the shaft stub with the shaft stub extending into one end of the coupling bore and with the end face of the cam engaging the end of the coupling and overlying the corresponding end of the keyway; and brazing the shaft coupling to the shaft stub and to the end face of the cam to join the coupling to the cam and to close one end of the bore and keyway in the coupling.
Claim 2
Independent Claim
219 words
A method of making a cam shaft having a trunnion at one end of a cam and a blind end shaft coupling internally of the trunnion for connection to an external shaft comprising: forming a shaft coupling having an axial bore and an internal keyway extending therethrough and dimensioned to have a working clearance with a keyed end of an external shaft, and forming a smooth cylindrical outer bearing surface on the shaft coupling coaxial with the bore; forming a cam with a peripheral cam surface, a cam end face at one end of the cam surface, and a shaft stub extending from the cam end face eccentric to the peripheral cam surface and having a diameter to tightly fit in the coupling bore and a length which is short as compared to its diameter and substantially shorter than the coupling; assembling the coupling onto the shaft stub with the shaft stub extending into one end of the coupling bore and with the end face of the cam engaging the end of the coupling and overlying the corresponding end of the keyway; and brazing the shaft coupling to the shaft stub and to the end face of the cam to join the coupling to the cam and to close one end of the bore and keyway in the coupling.
Claim 3
Dependent Claim
25 words
The method of claim 1 including forming a trunnion on the end of the cam opposite the shaft stub and cOaxial with the shaft stub.
Claim 4
Independent Claim
256 words
A method of forming a cam shaft having a trunnion at one end of a cam and a blind end shaft coupling internally of the trunnion for connection to an external shaft comprising: forming a shaft coupling having an axial bore and an internal keyway extending therethrough and dimensioned to have a working clearance with a keyed end of an external shaft, and forming a smooth cylindrical outer bearing surface on the shaft coupling coaxial with the bore; forming a cam with a peripheral cam surface, end faces at opposite ends of the cam, and a bore extending through the cam eccentric to the peripheral cam surface and having a diameter substantially equal to the diameter of the bore in the coupling; forming a shaft separate from the cam and coupling having an outer diameter to tightly fit in the cam bore and coupling bore and a length greater than the length of the cam; assembling the shaft into the bore in the cam to a position in which one end of the shaft extends axially from one end face of the cam a short distance less than the diameter of the shaft to form a shaft stub thereat, and assembling one end of the coupling onto the shaft stub with the shaft stub extending into one end of the coupling bore and with the end face of the cam overlying the corresponding end of the keyway; and brazing the end of the coupling to the shaft stub and to the end face of the cam.
Claim 5
Independent Claim
256 words
A method of forming a cam shaft having a trunnion at one end of a cam and a blind end shaft coupling internally of the trunnion for connection to an external shaft comprising: forming a shaft coupling having an axial bore and an internal keyway extending therethrough and dimensioned to have a working clearance with a keyed end of an external shaft, and forming a smooth cylindrical outer bearing surface on the shaft coupling coaxial with the bore; forming a cam with a peripheral cam surface, end faces at opposite ends of the cam, and a bore extending through the cam eccentric to the peripheral cam surface and having a diameter substantially equal to the diameter of the bore in the coupling; forming a shaft separate from the cam and coupling having an outer diameter to tightly fit in the cam bore and coupling bore and a length greater than the length of the cam; assembling the shaft into the bore in the cam to a position in which one end of the shaft extends axially from one end face of the cam a short distance less than the diameter of the shaft to form a shaft stub thereat, and assembling one end of the coupling onto the shaft stub with the shaft stub extending into one end of the coupling bore and with the end face of the cam overlying the corresponding end of the keyway; and brazing the end of the coupling to the shaft stub and to the end face of the cam.
Claim 6
Dependent Claim
45 words
The method of claim 3 wherein the shaft has a press fit in the bores in the cam and coupling and is first pressed into the cam bore beginning at the end of the shaft remote from said one end which forms the shaft stub.
Claim 7
Dependent Claim
32 words
The method of claim 4 including forming a reduced diameter trunnion on the end of the shaft remote from said one end before pressing the shaft into the bore in the cam.
Claim 8
Dependent Claim
18 words
The method of claim 3 wherein the cam and coupling are formed with substantially the same outer diameter.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |