US3836341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wear resistant composite cylinder linings
Assignee: Nordson Xaloy Inc
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Filing: 1972-10-10
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Granted: 1974-09-17
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Expires: 1992-10-10
Abstract
Abstract A wear- and corrosion-resistant lining material for extruder barrels or injection molding machine cylinders, constituted of a non-ferrous, tungsten carbide-containing alloy material incorporating from 30 to 45% tungsten carbide, 22 to 61% nickel, up to 37% cobalt, up to 12% chromium, 1.3 to 3.0% boron, 0.7 to 3.3% silicon, and up to 1.0, 3.3 and 0.6% of manganese, iron and carbon, respectively, all percentages being given by weight. The lining is centrifugally cast with the tungsten carbide particles dispersed differentially across a substantial proportion of the thickness thereof.
Inventors
- 👤 G Saltzman
- 👤 T Otani
- 👤 D Lomax
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:07
CPC Classifications
C; C23; C23C; C23C24/00; C23C24/08; C23C24/10; C23C24/103; B; B29; B29C; B29C45/00; B29C45/17; B29C45/46; B29C45/58; B29C45/62; C22; C22C; C22C32/00; C22C32/0047; C22C32/0052; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4998; Y10T29/49982; Y10T29/49984; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12021
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
41 words
The cylinder of claim 1, wherein the lining incorporates a nickel-rich alloy matrix including cobalt, boron, silicon and iron, and wherein said lining is prepared by centrifugal casting of the following ingredients fused together in approximately the proportions set forth below:
Claim 2
Dependent Claim
43 words
The cylinder of claim 1, wherein the lining incorporates a nickel-rich alloy matrix including cobalt, chromium, boron, silicon, carbon, and iron, and wherein said lining is prepared by centrifugal casting of the following ingredients fused together in approximately the proportions set forth below:
Claim 3
Dependent Claim
43 words
The cylinder of claim 1, wherein the lining incorporates a cobalt-rich matrix with nickel, chromium, boron, silicon, iron, manganese and carbin, and wherein said lining is prepared by centrifugal casting of the following ingredients fused together in approximately the proportions set forth below:
Claim 4
Dependent Claim
20 words
The cylinder of claim 1, wherein the tungsten carbide particles in the lining are at least 100 mesh or finer.
Claim 5
Dependent Claim
25 words
The cylinder of claim 1, in which the tungsten carbide is dispersed across from 45 to 80 percent by volume of the lining as cast.
References Cited (Backward Citations)
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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) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |