Patent US3187947A successfully refreshed from Google Patents.
Patent US3828415A successfully refreshed from Google Patents.
US3828415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for rebuilding valve guides
Assignee: LINE TOOL CO K
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Filing: 1971-11-26
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Granted: 1974-08-13
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Expires: 1991-11-26
Abstract
Abstract This disclosure relates to a method and system for rebuilding valve guides for internal combustion engines wherein the old worn guides are first reamed and then have slitted tubular members forced into the reamed guides. The tubular member inserts can then be reamed to size. The operation can also include knurling and broaching of the tubular members after insertion of the tubular member into the the reamed valve guide. The tubular member has an outer diameter greater than the inner diameter of the reamed guide so that a press fit between the tubular member and the guide results.
Inventors
- 👤 J Kammeraad
- 👤 D Kammeraad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:01
CPC Classifications
B; B23; B23P; B23P6/00; B23P19/00; B23P19/04; B23P19/08; B23P19/084; F; F01; F01L; F01L3/00; F01L3/08; Y; Y10; Y10S; Y10S29/00; Y10S29/023; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49298; Y10T29/493; Y10T29/49302; Y10T29/49718; Y10T29/49732; Y10T29/49734; Y10T29/49826; Y10T29/49863; Y10T29/4987; Y10T29/49872; Y10T29/49945; Y10T29/53; Y10T29/53657
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
167 words
A method of rebuilding valve guides comprising the steps of: reaming a valve guide so as to expand the diameter thereof: providing a tubular metallic insert having an open longitudinal slit extending the length thereof, said slit being adapted to close upon radial compression of said insert, the outer diameter of said insert, with said slit completely closed under such radial compression, substantially equaling the diameter of said reamed guide; forcing said insert into a tapered adapter having a minimum diameter substantially equal to the diameter of said reamed guide and thereby radially compressing said insert and completely closing said slit; positioning said adapter over said valve guide with said insert in alignment with said valve guide; driving said insert through said adapter into said valve guide until the leading extremity of said insert is flush with the adapter-remote extremity of said valve guide; removing said adapter; and trimming any excess portion of said insert such that said insert is thereafter substantially coextensive with said valve guide.
Claim 2
Independent Claim
167 words
A method of rebuilding valve guides comprising the steps of: reaming a valve guide so as to expand the diameter thereof: providing a tubular metallic insert having an open longitudinal slit extending the length thereof, said slit being adapted to close upon radial compression of said insert, the outer diameter of said insert, with said slit completely closed under such radial compression, substantially equaling the diameter of said reamed guide; forcing said insert into a tapered adapter having a minimum diameter substantially equal to the diameter of said reamed guide and thereby radially compressing said insert and completely closing said slit; positioning said adapter over said valve guide with said insert in alignment with said valve guide; driving said insert through said adapter into said valve guide until the leading extremity of said insert is flush with the adapter-remote extremity of said valve guide; removing said adapter; and trimming any excess portion of said insert such that said insert is thereafter substantially coextensive with said valve guide.
Claim 3
Dependent Claim
44 words
A method according to claim 1 further comprising the step of flowing the metal of said insert after said insert has been driven into said reamed valve guide to seal said slit thereby preventing oil from flowing through said slit within said valve guide.
Claim 4
Dependent Claim
18 words
A method according to claim 2 wherein said flowing step comprises narrowing the inner diameter of said insert.
Claim 5
Dependent Claim
18 words
The method according to claim 2 wherein said flowing step comprises broaching the inner surface of said insert.
Claim 6
Dependent Claim
31 words
The method of claim 2 further comprising the step of reaming said inner surface of said insert after said flowing step to make a pre-determined diameter bore for said valve guide.
Claim 7
Dependent Claim
36 words
A method according to claim 1 wherein said longitudinal slit is formed of interengaging finger portions which abut each other at the circumferential edges thereof so as to prevent flow of oil through said valve guide.
Claim 8
Dependent Claim
15 words
A method according to claim 1 wherein said tubular insert is made from phosphor bronze.
Claim 9
Dependent Claim
26 words
A method according to claim 7 wherein the wall thickness of said tubular insert is in the range of 10 to 25 thousands of an inch.
Claim 10
Dependent Claim
26 words
A method according to claim 1 wherein the wall thickness of said tubular insert is in the range of 10 to 25 thousands of an inch.
Claim 11
Dependent Claim
24 words
A method according to claim 1 wherein said tubular insert is formed by progressively forming cut blanks from sheet stock into a tubular shape.
Claim 12
Dependent Claim
21 words
A method according to claim 1 wherein said longitudinal slit is formed by offset portions so that said slit is nonlinear.
Claim 13
Dependent Claim
47 words
A method according to claim 1 further comprising the step of reaming the inner surface of said tubular insert after said tubular insert has been forced into said reamed valve guide, so as to provide the inner surface of said tubular insert with a pre-determined inner diameter.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |