US3768378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machines
Assignee: Hagglunds Denison Corp
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Filing: 1971-11-10
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Granted: 1973-10-30
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Expires: 1991-11-10
Abstract
Abstract An unusual kind of wear between machine parts in sliding contact, traceable to environment, is greatly reduced by constituting at least one of the parts of a preferred steel alloy casting consisting essentially of Carbon0.9-1.1Chromium4.0-6.5Molybdenum2.5-7.5Vanadium1.01.75Tungsten2.8 -3.5balance Iron In a specific embodiment, the part is the cam ring of a vane pump obtained by casting the alloy as a centrifugal tube and cutting ring blanks from the end of the tube.
Inventors
- 👤 C Adams
- 👤 J Connelly
- 👤 J Krehlik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:31
CPC Classifications
F; F04; F04B; F04B1/00; F04B1/12; F04B1/122; B; B23; B23P; B23P13/00; C; C22; C22C; C22C38/00; C22C38/12; C22C38/18; C22C38/22; C22C38/24; F01; F01C; F01C21/00; F01C21/10; F01C21/104; F01C21/106; Y; Y10; Y10S; Y10S384/00; Y10S384/90; Y10S384/912
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
25 words
A machine according to claim 1 in which the alloy consists essentially of Carbon 0.9-1.2 Chromium 4-8 Molybdenum 2-9 Vanadium 1.0-1.75 Tungsten 2.8-3.5 Balance Iron
Claim 2
Dependent Claim
25 words
A machine according to claim 1 which is a vane type fluid energy translating device, one of said parts being the cam of the device.
Claim 3
Dependent Claim
28 words
A device according to claim 3 in which the alloy for the cam consists essentially of Carbon 0.9-1.2 Chromium 4-8 Molybdenum 2-9 Vanadium 1.0-1.75 Tungsten 2.8-3.5 Balance Iron
Claim 4
Dependent Claim
39 words
A machine according to claim 1 which is an axial piston pump having a cam plate and a piston member equipped with a shoe sliding on the cam plate member, one of said parts being one of said members.
Claim 5
Dependent Claim
75 words
In a component of a hydraulic system, wherein the component receives and exhausts fluid flow and includes a part presenting a wear metal surface which is subject to damage by loss of surface material at the fluid-metal interface as fluid flow occurs relative to said metal surface, characterized by said part and its metal surface being cast from an alloy consisting essentially of Carbon 0.9-1.2 Chromium 4-6 Molybdenum 2-9 Vanadium plus Tungsten 3-6 Balance Iron
Claim 6
Dependent Claim
34 words
A component according to claim 6 wherein a second surface is in bearing contact with said first metal surface as said fluid flow is occurring, the two surfaces having relative movement one to another.
Claim 7
Dependent Claim
13 words
A component according to claim 7 embodied in a fluid energy translating device.
Claim 8
Dependent Claim
14 words
The fluid energy translating device of claim 8 which is of the vane type.
Claim 9
Dependent Claim
24 words
The device of claim 9 wherein the first metal surface is part of a cam that imparts reciProcation to the vanes of the device.
Claim 10
Dependent Claim
30 words
The device of claim 9 wherein said first metal surface is composed of an alloy consisting essentially of Carbon 0.9-1.1 Chromium 4.0-6.5 Molybdenum 2.5-7.5 Vanadium 1.0-1.75 Tungsten 2.8-3.5 Balance Iron
Claim 11
Dependent Claim
14 words
The fluid energy translating device of claim 8 which is of the piston type.
Claim 12
Dependent Claim
14 words
The fluid energy translating device of claim 8 which is of the gear type.
Claim 13
Dependent Claim
33 words
The device of claim 10 wherein the vanes are arranged to be largely in radial hydraulic balance with relatively low force vane actuator means provided to urge the vanes against the cam surface.
Claim 14
Dependent Claim
23 words
The device of claim 14 wherein the alloy consists essentially of Carbon 0.9-1.1 Chromium 4.0-6.5 Molybdenum 2.5-7.5 Vanadium 1-1.75 Tungsten 2.8-3.5 Balance Iron
Claim 15
Dependent Claim
85 words
In a machine where operation is characterized by one metal part having a surface sliding on the opposed surface of another metal part, improvement comprising one of said surfaces being constituted of cast ferrous metal alloy containing about Carbon 0.5-1.5 Vanadium plus 2-6 Tungsten Chromium Up to 8 Molybdenum Up to 9 balance substantially all iron, said casting being heat treated and characterized by a grain body hardness of Rc at least 50 and a carbide grain boundary network of Rc hardness at least 70.
Claim 16
Dependent Claim
30 words
A machine according to claim 16 which is a fluid displacement device including a cam surface presented by one of said parts, the other of said parts being a vane.
Claim 17
Dependent Claim
22 words
A machine according to claim 16 in which the alloy contains about Carbon 0.9-1.2 Vanadium plus Tungsten 3-6 Chromium 4-8 Molybdenum 2-9
Claim 18
Dependent Claim
22 words
A machine according to claim 12 in which the alloy contains about Carbon 0.9-1.2 Vanadium plus Tungsten 3-6 Chromium 4-8 Molybdenum 2-9
Claim 19
Dependent Claim
22 words
A machine according to claim 17 in which the alloy contains about Carbon 0.9-1.1 Chromium 4.0-6.5 Molybdenum 2.5-7.5 Vanadium 1.0-1.75 Tungsten 2.8-3.5
Claim 20
Dependent Claim
46 words
In a vane type fluid energy translating device wherein one of the parts is a cam, the improvement characterized by the cam having a wearing surface formed from a cast alloy consisting essentially of: Carbon 0.9-1.1 Chromium 4.0-6.0 Molybdenum 2.5-3.5 Vanadium 1.0-1.75 Tungsten 2.8-3.5 Balance Iron
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) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |