US4302935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable (D)-port insert header for internal combustion engines
Assignee: Individual
•
Filing: 1980-01-31
•
Granted: 1981-12-01
•
Expires: 2000-01-31
Abstract
Abstract Individually adjustable D-port inserts for securement to an engine header and projecting therefrom into exhaust ports to occupy the stagnation areas thereof and in each instance placeable for fine tuning thereof to optimize flow, and removeable with the header without alteration of the exhaust port configuration established thereby.
Inventors
- 👤 Robert D. Cousimano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:58
CPC Classifications
F; F02; F02F; F02F1/00; F02F1/24; F02F1/42; F02F1/4264; F01; F01N; F01N13/00; F01N13/08; F01N13/10; F02B; F02B27/00; F02B27/04; F02F2001/244; F02F2001/245; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
102 words
An individually adjustable D-port insert for securement to an internal combustion engine exhaust header without alteration of the exhaust port-passage in the engine head, and comprising; a wedge-shaped body to extend into and occupy one side portion of the exhaust port-passage and having an exterior substantially complementary to said one side of the exhaust port-passage and with a leading edge to lie substantially contiguous to said one side of the exhaust passage ahead of the exhaust port and interface engagement with the exhaust header to which the insert is fixedly mounted for extension through the exhaust port and into said exhaust passage.
Claim 2
Dependent Claim
102 words
An individually adjustable D-port insert for securement to an internal combustion engine exhaust header without alteration of the exhaust port-passage in the engine head, and comprising; a wedge-shaped body to extend into and occupy one side portion of the exhaust port-passage and having an exterior substantially complementary to said one side of the exhaust port-passage and with a leading edge to lie substantially contiguous to said one side of the exhaust passage ahead of the exhaust port and interface engagement with the exhaust header to which the insert is fixedly mounted for extension through the exhaust port and into said exhaust passage.
Claim 3
Dependent Claim
33 words
The D-port insert as set forth in claim 1, wherein the wedge shape thereof includes a ramp configuration which is a fair continuation of the preceeding exhaust passage at said one side thereof.
Claim 4
Dependent Claim
59 words
The D-port insert as set forth in claim 1, wherein the wedge shape thereof includes a rounded ramp configuration which is a fair continuation of the preceeding exhaust passage and followed by a flattened wall which is a fair continuation thereof, said ramp and continuing wall occupying said one side of the exhaust passage extending to said exhaust port.
Claim 5
Dependent Claim
52 words
The D-port insert as set forth in claim 1, wherein the exhaust passage and exhaust port in the engine head are of round cross section, and wherein the insert body is of semi-circular cross section with an exterior substantially complementary to the said one side of the exhaust passage and exhaust port.
Claim 6
Dependent Claim
31 words
The D-port insert as set forth in claim 1, wherein the insert body has upwardly turned margins to lie contiguous to the opposite sides of the exhaust passage and exhaust port.
Claim 7
Dependent Claim
75 words
The D-port insert as set forth in claim 1, wherein the exhaust passage and exhaust port in the engine head are of round cross section, wherein the wedge-shaped insert body is of semi-circular cross section with an exterior substantially complementary to the said one side of the exhaust passage and exhaust port, and wherein the insert body has upwardly turned margins to lie contiguous to the opposite sides of the exhaust passage and exhaust port.
Claim 8
Dependent Claim
80 words
The D-port insert as set forth in claim 1, wherein the exhaust passage and exhaust port in the engine head are of round cross section, wherein the wedge shape of the insert includes a ramp configuration which is a fair continuation of the preceeding exhaust passage at said one side thereof, and wherein the body of the insert is of semi-circular cross section with an exterior substantially complementary to the said one side of the exhaust passage and exhaust port.
Claim 9
Dependent Claim
106 words
The D-port insert as set forth in claim 1, wherein the exhaust passage and exhaust port in the engine head are of round cross section, wherein the wedge shape of the insert includes a rounded ramp configuration which is a fair continuation of the preceeding exhaust passage and followed by a flattened wall which is a fair continuation thereof, said ramp and continuing wall occupying said one side of the exhaust passage extending to said exhaust port, and wherein the body of the insert is of semi-circular cross section with an exterior substantially complementary to the said one side of the exhaust passage and exhaust port.
Claim 10
Dependent Claim
93 words
The D-port insert as set forth in claim 1, wherein the exhaust passage and exhaust port in the engine head are of round cross section, wherein the wedge shape of the insert includes a ramp configuration which is a fair continuation of the preceeding exhaust passage at said one side thereof, wherein the body of the insert is of semi-circular cross section with an exterior substantially complementary to the said one side of the insert has upwardly turned margins to lie contiguous to the opposite sides of the exhaust passage and exhaust port.
Claim 11
Dependent Claim
127 words
The D-port insert as set forth in claim 1, wherein the exhaust passage and exhaust port in the engine head are of round cross section, wherein the wedge shape of the insert includes a rounded ramp configuration which is a fair continuation of the preceeding exhaust passage and followed by a flattened wall which is a fair continuation thereof, said ramp and continuing wall occupying said one side of the exhaust passage extending to said exhaust port, wherein the body of the insert is of semi-circular cross section with an exterior substantially complementary to the said one side of the exhaust passage and exhaust port, and wherein the insert has upwardly turned margins to lie contiguous to the opposite sides of the exhaust passage and exhaust port.
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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) | 1984-11-30 | 1985-06-01 | 1985-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-30 | 1989-06-01 | 1989-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-30 | 1993-06-01 | 1993-12-01 | $7700.00 | Window Closed / Lapsed |