US3828808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust valve for internal combustion engine
Assignee: Riva Calzoni SpA
•
Filing: 1973-02-06
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Granted: 1974-08-13
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Expires: 1993-02-06
Abstract
Abstract A valve for sealing the exhaust passage of an internal combustion engine to prevent the ingress of fluids under pressure when the engine is not working. The valve comprises an annular valve seat closable by a circular valve shutter disc or plate which is carried at the ends of two pivoted arms. The valve shutter plate is pivoted with respect to the two arms and provided with a mechanism for turning the plate with respect to the arms automatically as the valve is opened, to turn the operating face of the shutter plate away from the stream of hot exhaust gases which pass through the port surrounded by the annular valve seat, when the engine is running. Means for cooling the operating face of the shutter plate while the engine is running are also provided.
Inventors
- 👤 A Ortelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:39
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/08; F01N13/085; F16; F16K; F16K1/00; F16K1/16; F16K1/18; F16K1/20; F16K1/2007; F16K1/2028; F16K1/2042; F16K1/205; Y; Y10; Y10T; Y10T137/00; Y10T137/6416; Y10T137/6579
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
201 words
In a valve for sealing the exhaust passage of an internal combustion engine, of the type comprising: a valve body, an inlet port to said valve body, said valve body being adapted to be mounted with said inlet port coupled to receive exhaust gases from said exhaust passageway, a fixed annular valve seat surrounding said inlet port, a valve shutter plate cooperating with said fixed annular valve seat, pivoted support arm means carrying said valve shutter plate, said pivoted support arm means being rotatably between a first position where said valve shutter plate engages said annular valve seat to close said valve, and a second position spaced by about 90* from said first position to move said valve shutter plate away from said annular valve seat to open said valve, the improvement comprising, said valve shutter plate being rotatably mounted at the end of said pivoted support arm means, a fixed element, and means associated with said valve shutter plate for cooperating with said fixed element to cause said valve shutter plate to rotate through about 180* with respect to said support arm means as said support arm means rotates from one of said first and second positions to the other.
Claim 2
Dependent Claim
201 words
In a valve for sealing the exhaust passage of an internal combustion engine, of the type comprising: a valve body, an inlet port to said valve body, said valve body being adapted to be mounted with said inlet port coupled to receive exhaust gases from said exhaust passageway, a fixed annular valve seat surrounding said inlet port, a valve shutter plate cooperating with said fixed annular valve seat, pivoted support arm means carrying said valve shutter plate, said pivoted support arm means being rotatably between a first position where said valve shutter plate engages said annular valve seat to close said valve, and a second position spaced by about 90* from said first position to move said valve shutter plate away from said annular valve seat to open said valve, the improvement comprising, said valve shutter plate being rotatably mounted at the end of said pivoted support arm means, a fixed element, and means associated with said valve shutter plate for cooperating with said fixed element to cause said valve shutter plate to rotate through about 180* with respect to said support arm means as said support arm means rotates from one of said first and second positions to the other.
Claim 3
Dependent Claim
99 words
The exhaust passageway sealing valve of claim 1 wherein said valve body further comprises: a substantially cylindrical recess in one wall thereof, the axis of said recess being substantially perpendicular to the axis of said valve body and said recess being located in such a position that it is closed by said valve shutter plate when said support arm means are in said second position thereby to form a cylindrical chamber, and inlet port means and outlet port means in said recess whereby cooling fluid can be circulated therethrough when said recess is closed by said valve shutter plate.
Claim 4
Dependent Claim
61 words
The valve of claim 2 wherein said valve shutter plate is provided with a sealing ring on the face thereof which engages said fixed annular valve seat and said cylindrical recess, the diameter of said cylindrical recess being greater than or equal to the outer diameter of said sealing ring, but less than the outer diameter of said valve shutter plate.
Claim 5
Dependent Claim
119 words
The valve of claim 1 wherein said means associated with said valve shutter plate for cooperating with said fixed element to cause said valve shutter plate to rotate through about 180* with respect to said support arm means as said support arm means moves from one of said first and second positions to the other comprises: at least one plate associated with said valve shutter plate, said at least one plate having an elongate slot therein the axis of which extends substantially perpendicular to the plane of said valve shutter plate, and a fixed pivot pin engaged in said elongate slot of said at least one plate and allowing said at least one plate to slide with respect thereto.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |