US3869259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite sliding member
Assignee: Motors Liquidation Co
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Filing: 1973-05-02
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Granted: 1975-03-04
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Expires: 1993-05-02
Abstract
Abstract In a preferred embodiment a sliding member, such as an apex seal in a rotary internal combustion engine, is formed of particulate carbon interdispersed with, and metallurgically bonded to, a copper base alloy containing, by weight, 3% to 22% lead,, and titanium and optionally tin in amounts providing effective wetting and bonding of the metallic phase to the carbon and yet not substantially detracting from the physical strength of the composite, the carbon phase making up 20% to 80% by volume of the composite seal member. In various sliding members that have been evaluated as apex seals 5% to 20% of titanium and up to 15% tin in the copper base alloy have been successfully employed. Seal members of this composition are wear resistant and can be employed to particular advantage in combination with a rotor housing having a hard chrome wear surface.
Inventors
- 👤 David M Lindsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:06
CPC Classifications
F; F01; F01C; F01C19/00; F01C19/005; C; C22; C22C; C22C32/00; C22C32/0084; C22C9/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
71 words
A LIQUID PHASE SINTERED METAL-CARBON COMPOSITE SLIDING MEMBER FORMED OF CARBON UNIFORMLY DISPERSED IN AND METALLURGICALLY BONDED TO A PHASE OF A COPPER BASE ALLOY, SAID COPPER BASE ALLOY CONSISTING ESSENTIALLY , BY WEIGHT, OF 5% TO 20% TITAIUM, 3% TO 22% LEAD, 0% TO 15% TIN AND THE BALANCE COPPER, SAID CARBON MAKING UP ABOUT 20% TO 80% BY VOLUME OF SAID COMPOSITE MEMBER, SAID METALLURGICAL BOND COMPRISING TITANIUM CARBIDE.
Claim 2
Dependent Claim
71 words
A LIQUID PHASE SINTERED METAL-CARBON COMPOSITE SLIDING MEMBER FORMED OF CARBON UNIFORMLY DISPERSED IN AND METALLURGICALLY BONDED TO A PHASE OF A COPPER BASE ALLOY, SAID COPPER BASE ALLOY CONSISTING ESSENTIALLY , BY WEIGHT, OF 5% TO 20% TITAIUM, 3% TO 22% LEAD, 0% TO 15% TIN AND THE BALANCE COPPER, SAID CARBON MAKING UP ABOUT 20% TO 80% BY VOLUME OF SAID COMPOSITE MEMBER, SAID METALLURGICAL BOND COMPRISING TITANIUM CARBIDE.
Claim 3
Dependent Claim
82 words
A liquid phase sintered metal-carbon composite sliding member consisting essentially of particulate carbon dispersed in and metallurgically bonded to a continuous interconnecting phase of a copper base alloy, said carbon particles being initially about 200 mesh or smaller and collectively making up 20 to 80 volume percent of said composite member, said copper base alloy consisting essentially, by weight, of 5% to 20% titanium, 3% to 22% lead, 0% to 15% tin and the balance copper, said metallurgical bond comprising titanium carbide.
Claim 4
Dependent Claim
82 words
A liquid phase sintered metal-carbon composite sliding member consisting essentially of particulate carbon dispersed in and metallurgically bonded to a continuous interconnecting phase of a copper base alloy, said carbon particles being initially about 200 mesh or smaller and collectively making up 20 to 80 volume percent of said composite member, said copper base alloy consisting essentially, by weight, of 5% to 20% titanium, 3% to 22% lead, 0% to 15% tin and the balance copper, said metallurgical bond comprising titanium carbide.
Claim 5
Dependent Claim
91 words
A liquid phase sintered metal-carbon composite sliding member particularly suitable for use as a rotary engine apex seal member consisting essentially of particulate carbon dispersed in and metallurgically bonded to a continuous interconnecting phase of a copper base alloy, said carbon particles being initially -325 mesh and collectively making up about 40 to 65 volume percent of said composite member, said copper base alloy consisting essentially, by weight, of 5% to 20% titanium, 3% to 22% lead, 4% to 15% tin and the balance copper, said metallurgical bond comprising titanium carbide.
Claim 6
Dependent Claim
91 words
A liquid phase sintered metal-carbon composite sliding member particularly suitable for use as a rotary engine apex seal member consisting essentially of particulate carbon dispersed in and metallurgically bonded to a continuous interconnecting phase of a copper base alloy, said carbon particles being initially -325 mesh and collectively making up about 40 to 65 volume percent of said composite member, said copper base alloy consisting essentially, by weight, of 5% to 20% titanium, 3% to 22% lead, 4% to 15% tin and the balance copper, said metallurgical bond comprising titanium carbide.
Claim 7
Dependent Claim
89 words
A liquid phase sintered metal-carbon composite sliding member particularly suitable for use as a rotary engine apex seal member formed of carbon particles dispersed in and metallurgically bonded to an interconnecting phase of a copper base alloy, said carbon particles being initially -325 mesh and collectively making up about 40 to 65 volume percent of said composite member, said copper base alloy consisting essentially, by weight, of 9% to 18% titanium, 4% to 10% lead, 4% to 13% tin and the balance copper, said metallurgical bond comprising titanium carbide.
Claim 8
Dependent Claim
89 words
A liquid phase sintered metal-carbon composite sliding member particularly suitable for use as a rotary engine apex seal member formed of carbon particles dispersed in and metallurgically bonded to an interconnecting phase of a copper base alloy, said carbon particles being initially -325 mesh and collectively making up about 40 to 65 volume percent of said composite member, said copper base alloy consisting essentially, by weight, of 9% to 18% titanium, 4% to 10% lead, 4% to 13% tin and the balance copper, said metallurgical bond comprising titanium carbide.
References Cited (Backward Citations)
US3114197A
Cited
US3177564A
Cited
US3191278A
Cited
US3545901A
Cited
US3795493A
Cited
US3782930A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |