Patent US4032334A successfully refreshed from Google Patents.
US4032334A
Expired / Lapsed
US
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Tappet metallurgy
Assignee: Precision Engine Products Corp
•
Filing: 1976-05-10
•
Granted: 1977-06-28
•
Expires: 1996-05-10
Abstract
Abstract An engine tappet has a specific composition of alloyed heat treated chilled iron to maintain the highest amount of carbides after thermal treatment to harden the matrix.
Inventors
- 👤 Wayne E. Burk
- 👤 William B. Hamilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:05
CPC Classifications
C; C22; C22C; C22C37/00; C22C37/06; C22C37/08
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
56 words
An internal combustion engine component comprising a body having at least a wearing surface formed of chilled high strength alloy cast iron consisting essentially of the following composition: ______________________________________
Element Percent by Weight
______________________________________
Carbon 3.20-3.70
Silicon 2.00-2.90
Manganese 0.60-1.00
Chromium 1.00-1.80
Nickel 0.40-0.70
Molybdenum 0.80-2.60
Iron (plus minor
sulphur, copper
& phosphorus
elements) Balance
______________________________________
Claim 2
Dependent Claim
56 words
An internal combustion engine component comprising a body having at least a wearing surface formed of chilled high strength alloy cast iron consisting essentially of the following composition: ______________________________________
Element Percent by Weight
______________________________________
Carbon 3.20-3.70
Silicon 2.00-2.90
Manganese 0.60-1.00
Chromium 1.00-1.80
Nickel 0.40-0.70
Molybdenum 0.80-2.60
Iron (plus minor
sulphur, copper
& phosphorus
elements) Balance
______________________________________
Claim 3
Dependent Claim
11 words
The structure of claim 1 including 0.10-0.50 percent by weight vanadium.
Claim 4
Dependent Claim
22 words
The structure of claim 1 wherein the maximum percentages of the sulphur, copper and phosphorus elements are respectively 0.18, 0.15 and 0.40.
Claim 5
Dependent Claim
11 words
The structure of claim 1 wherein said component is a tappet.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-27 | 1980-12-27 | 1981-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-27 | 1984-12-27 | 1985-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-27 | 1988-12-27 | 1989-06-28 | $7700.00 | Window Closed / Lapsed |