US3789811A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emissions reduction vacuum control valve
Assignee: FRANZ AND FREISMUTH
•
Filing: 1971-11-03
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Granted: 1974-02-05
•
Expires: 1991-11-03
Abstract
Abstract Spark advance vacuum control valve arranged to reduce the emission of noxious gases from the internal combustion engines of automotive vehicles. A solenoid energized by an electric switch in association with the transmission operates a valve effective to vent the distributor to atmosphere as the engine is started and the transmission is shifted into high gear. When the transmission is in high gear, the solenoid is deenergized to connect the distributor to effect advance of the spark by carburetor vacuum. A manifold port, distributor port and vent port lead into the valve housing through a wall of the housing while the carburetor port is at an end of the valve housing. A valve chamber within the housing has communication with the manifold vacuum port, the distributor port, the vent port and the carburetor vaccum port under the control of a thermally responsive valve. The thermally responsive valve is operated by overheating of the engine to advance the spark by manifold vacuum and increase the speed of the engine.
Inventors
- 👤 R Franz
- 👤 J Freismuth
- 👤 N Benedetti
- 👤 L Benedetti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:32
CPC Classifications
F; F02; F02P; F02P5/00; F02P5/04; F02P5/05; F02P5/10; F02P5/103; Y; Y10; Y10T; Y10T137/00; Y10T137/1842; Y10T137/1939; Y10T137/1963; Y10T137/1987
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
419 words
In a vacuum control valve adapted to control the advance of the spark of an internal combustion engine having an intake manifold, a carburetor and a distributor, a valve housing having a widened flanged end, a distributor port leading into said housing and adapted to be connected with the distributor of the engine, a vent port spaced along said housing from said distributor vacuum port and leading into said housing from the side thereof, a passageway leading from said vent port and extending axially of said housing and opening to said end thereof, a carburetor vacuum port including a fitting leading from said end of said housing and directly aligned with and spaced from said passageway, a casing closing the end of said valve housing and forming a mounting for said carburetor fitting, a valve chamber formed between said end of said valve housing and said casing and having communication with said vent port, said carburetor vacuum port and said distributor port, a valve disposed in said valve chamber between the end of said passageway and adjacent the end of said carburetor port fitting, said valve normally biased to close said passageway to afford communication between said distributor port and said carburetor vacuum port, a spool carried within said casing concentric with said carburetor port fitting and sealing said fitting at its inner periphery, said inner periphery defined by an interior cylindrical wall having a seal extending thereabout in sealing engagement with said fitting, said spool having a top radial flange extending radially of said valve housing flanged end, a bottom radial flange beneath said top flange, an annular axially extending leg defining said interior wall and extending beneath said bottom radial flange, a third radial flange extending outwardly from the bottom of said axially extending leg, said casing extending along said annular leg and having abutting engagement with said top radial flange and being crimped thereabout to retain said spool to said casing and to said end of said valve housing, an annular seal recessed in and extending about said flanged end of said valve housing and abutted by said top radially extending flange of said spool to effect the sealing of said flanged end of said valve body by said spool, and electrically energizable means including a solenoid coil wound about said spool for moving said valve into position to block the passage of vacuum from said distributor port through said carburetor vacuum port and to afford communication between said vent port and said distributor vacuum port.
Claim 2
Dependent Claim
419 words
In a vacuum control valve adapted to control the advance of the spark of an internal combustion engine having an intake manifold, a carburetor and a distributor, a valve housing having a widened flanged end, a distributor port leading into said housing and adapted to be connected with the distributor of the engine, a vent port spaced along said housing from said distributor vacuum port and leading into said housing from the side thereof, a passageway leading from said vent port and extending axially of said housing and opening to said end thereof, a carburetor vacuum port including a fitting leading from said end of said housing and directly aligned with and spaced from said passageway, a casing closing the end of said valve housing and forming a mounting for said carburetor fitting, a valve chamber formed between said end of said valve housing and said casing and having communication with said vent port, said carburetor vacuum port and said distributor port, a valve disposed in said valve chamber between the end of said passageway and adjacent the end of said carburetor port fitting, said valve normally biased to close said passageway to afford communication between said distributor port and said carburetor vacuum port, a spool carried within said casing concentric with said carburetor port fitting and sealing said fitting at its inner periphery, said inner periphery defined by an interior cylindrical wall having a seal extending thereabout in sealing engagement with said fitting, said spool having a top radial flange extending radially of said valve housing flanged end, a bottom radial flange beneath said top flange, an annular axially extending leg defining said interior wall and extending beneath said bottom radial flange, a third radial flange extending outwardly from the bottom of said axially extending leg, said casing extending along said annular leg and having abutting engagement with said top radial flange and being crimped thereabout to retain said spool to said casing and to said end of said valve housing, an annular seal recessed in and extending about said flanged end of said valve housing and abutted by said top radially extending flange of said spool to effect the sealing of said flanged end of said valve body by said spool, and electrically energizable means including a solenoid coil wound about said spool for moving said valve into position to block the passage of vacuum from said distributor port through said carburetor vacuum port and to afford communication between said vent port and said distributor vacuum port.
Claim 3
Dependent Claim
305 words
In a vacuum control valve adapted to control the advance of the spark of an internal combustion engine having an intake manifold, a carburetor and a distributor, a valve housing, a distributor port leading into said housing and adapted to be connected with the distributor of the engine, a vent port spaced along said housing from said distributor vacuum port and leading into said housing from the side thereof, a passageway leading from said vent port and extending axially of said housing and opening to an end thereof, a carburetor vacuum port including a fitting leading from an end of said houSing and directly aligned with and spaced from said passageway, a casing closing the end of said valve housing and forming a mounting for said carburetor fitting, a valve chamber formed between the end of said valve housing and said casing and having communication with said vent port, said carburetor vacuum port and said distributor port, a valve disposed in said valve chamber between the end of said passageway and adjacent the inner end of said carburetor port fitting, said valve normally biased to close said passageway to afford communication between said distributor port and said carburetor vacuum port, said valve being a resilient ball-like valve, an annular metallic disk extending about said ball and recessed therein, electrically energizable means including a solenoid coil contained within said casing concentric with said fitting for moving said disk and ball toward said carburetor fitting to close said carburetor port, and block the passage of vacuum from said distributor port through said carburetor vacuum port and to afford communication between said vent port and said distributor vacuum port, and a spring interposed between said solenoid coil and said disk to bias said resilient valve into engagement with the end of said passageway leading from said vent port.
Claim 4
Dependent Claim
305 words
In a vacuum control valve adapted to control the advance of the spark of an internal combustion engine having an intake manifold, a carburetor and a distributor, a valve housing, a distributor port leading into said housing and adapted to be connected with the distributor of the engine, a vent port spaced along said housing from said distributor vacuum port and leading into said housing from the side thereof, a passageway leading from said vent port and extending axially of said housing and opening to an end thereof, a carburetor vacuum port including a fitting leading from an end of said houSing and directly aligned with and spaced from said passageway, a casing closing the end of said valve housing and forming a mounting for said carburetor fitting, a valve chamber formed between the end of said valve housing and said casing and having communication with said vent port, said carburetor vacuum port and said distributor port, a valve disposed in said valve chamber between the end of said passageway and adjacent the inner end of said carburetor port fitting, said valve normally biased to close said passageway to afford communication between said distributor port and said carburetor vacuum port, said valve being a resilient ball-like valve, an annular metallic disk extending about said ball and recessed therein, electrically energizable means including a solenoid coil contained within said casing concentric with said fitting for moving said disk and ball toward said carburetor fitting to close said carburetor port, and block the passage of vacuum from said distributor port through said carburetor vacuum port and to afford communication between said vent port and said distributor vacuum port, and a spring interposed between said solenoid coil and said disk to bias said resilient valve into engagement with the end of said passageway leading from said vent port.
Claim 5
Dependent Claim
87 words
The vacuum control valve of claim 2, wherein the fitting defining the carburetor port has a central passageway leading therealong, wherein a flared frusto-conical wall diverges from the lower end of said central passageway and forms a seat for said valve, and wherein a frusto-conical wall diverges from the upper end of said passageway leading to said vent port coaxially of said carburetor vacuum port and forms a seat for said ball to accommodate the tight sealing of said vent passageway by the bias of said spring.
Claim 6
Dependent Claim
120 words
The vacuum control valve of claim 3, including an annular flange extending radially of the end of said housing adjacent said carburetor port, a seal recessed in said flange and extending thereabout, a spool having a radially extending flange abutting said seal, wherein the solenoid coil is wound about said spool, wherein the casing is curled about said radially extending flange of said spool and said radial flange of said housing and presses said radially extending flange into sealing engagement with said seal, and wherein said spool has an interior cylindrical wall and a resilient gasket is provided between said interior cylindrical wall and said carburetor fitting to cooperate with said first mentioned seal and provide a sealed valve chamber.
Claim 7
Dependent Claim
365 words
A vacuum controlled valve comprising, a valve housing, at least two ports spaced along said housing, a first being a vent port, a second port adapted to draw vacuum into the housing, a fitting spaced from an end of said valve housing and defining a third port adapted to be connected to a source of vacuum, a first passageway leading from said vent port to the open end of said housing and opening to the same end of said housing as said fitting and extending coaxially of said fitting, a second passageway leading from the end of said housing and having communication with said second port, a solenoid coil encircling said fitting, a spool having said solenoid coil wound therearound, said spool having top and bottom radial flanges, an annular axially extending leg extending beneath the bottom radial flange and having a third radial flange extending outwardly from the bottom thereof, said top flange abutting the end of said valve body defined as a widened radial flange, a casing carrying said spool and said solenoid coil and closing said flanged end of said valve housing and the end of said solenoid coil with the space between said flanged end of said housing and said solenoid coil defining a valve chamber, said casing also forming a mounting for said fitting, a resilient valve member in said valve chamber in alignment with and between said third port and said first passageway leading from said vent port, an armature carrying said resilient valve member, spring means biasing said valve member to close said vent port, whereby energization of said solenoid coil will open said vent port and close said third port, and provide communication between said vent port and said second port, an annular seal recessed in said flanged end of said valve housing and abutted by said top flange of said spool, and said casing being crimped about said top radial flange of said spool and said widened radial flange of said housing to retain said casing to said valve housing and seal the open end of said valve housing to provide communication between said third port and said second port under the control of said valve.
Claim 8
Dependent Claim
365 words
A vacuum controlled valve comprising, a valve housing, at least two ports spaced along said housing, a first being a vent port, a second port adapted to draw vacuum into the housing, a fitting spaced from an end of said valve housing and defining a third port adapted to be connected to a source of vacuum, a first passageway leading from said vent port to the open end of said housing and opening to the same end of said housing as said fitting and extending coaxially of said fitting, a second passageway leading from the end of said housing and having communication with said second port, a solenoid coil encircling said fitting, a spool having said solenoid coil wound therearound, said spool having top and bottom radial flanges, an annular axially extending leg extending beneath the bottom radial flange and having a third radial flange extending outwardly from the bottom thereof, said top flange abutting the end of said valve body defined as a widened radial flange, a casing carrying said spool and said solenoid coil and closing said flanged end of said valve housing and the end of said solenoid coil with the space between said flanged end of said housing and said solenoid coil defining a valve chamber, said casing also forming a mounting for said fitting, a resilient valve member in said valve chamber in alignment with and between said third port and said first passageway leading from said vent port, an armature carrying said resilient valve member, spring means biasing said valve member to close said vent port, whereby energization of said solenoid coil will open said vent port and close said third port, and provide communication between said vent port and said second port, an annular seal recessed in said flanged end of said valve housing and abutted by said top flange of said spool, and said casing being crimped about said top radial flange of said spool and said widened radial flange of said housing to retain said casing to said valve housing and seal the open end of said valve housing to provide communication between said third port and said second port under the control of said valve.
Claim 9
Dependent Claim
52 words
The vacuum control valve of claim 5, wherein the resilient valve is a ball-like valve, wherein frusto-conical seats for said valve are provided on the adjacent ends of said fitting and said passageway leading from the end of said vent port, and wherein said fitting is sealed to said spool and casing.
Claim 10
Dependent Claim
300 words
A solenoid-energized, thermally responsive valve for controlling vacuum to the spark advance mechanism of a distributor used in an internal combustion engine to control hydrocarbon emissions therefrom, said valve comprising: a. a valve housing having first and second flanged ends, a longitudinally extending first valve chamber opening at one end to said first flanged end and a first valve seat at the opposite end of said chamber, a distributor and a manifold vacuum port communicating with said first chamber, a passageway in said housing opening from said second flanged end and communicating with said first valve seat, a second valve seat in said second flanged end and a vented port communicating with said second valve seat; b. a first casing section containing a thermally responsive unit sealingly crimped over said first flanged end, a piston extending from said unit into said first chamber; c. a plunger and third valve seat in said first chamber actuated by said piston, a first resilient valve member between said first and third valve seats and spring means normally biasing said first valve member into sealingly engagement with said third valve seat to seal communication between said manifold port and said distributor port; d. a second annular casing section sealingly crimped over said second flange to define a second valve chamber therebetween, said casing containing an annular spool, a solenoid coil wound around said spool and a fitting defining a carburetor vacuum port extending therethrough and sealed therein, said fitting having an end formed into a fourth valve seat disposed opposite that of said second valve seat in said second valve chamber; and e. a second resilient valve member in said second valve chamber, and spring means in said second chamber normally biasing said second resilient valve member into sealingly engagement with said second seat.
Claim 11
Dependent Claim
300 words
A solenoid-energized, thermally responsive valve for controlling vacuum to the spark advance mechanism of a distributor used in an internal combustion engine to control hydrocarbon emissions therefrom, said valve comprising: a. a valve housing having first and second flanged ends, a longitudinally extending first valve chamber opening at one end to said first flanged end and a first valve seat at the opposite end of said chamber, a distributor and a manifold vacuum port communicating with said first chamber, a passageway in said housing opening from said second flanged end and communicating with said first valve seat, a second valve seat in said second flanged end and a vented port communicating with said second valve seat; b. a first casing section containing a thermally responsive unit sealingly crimped over said first flanged end, a piston extending from said unit into said first chamber; c. a plunger and third valve seat in said first chamber actuated by said piston, a first resilient valve member between said first and third valve seats and spring means normally biasing said first valve member into sealingly engagement with said third valve seat to seal communication between said manifold port and said distributor port; d. a second annular casing section sealingly crimped over said second flange to define a second valve chamber therebetween, said casing containing an annular spool, a solenoid coil wound around said spool and a fitting defining a carburetor vacuum port extending therethrough and sealed therein, said fitting having an end formed into a fourth valve seat disposed opposite that of said second valve seat in said second valve chamber; and e. a second resilient valve member in said second valve chamber, and spring means in said second chamber normally biasing said second resilient valve member into sealingly engagement with said second seat.
Claim 12
Dependent Claim
56 words
The solenoid-energized, thermally responsive valve of claim 7, wherein said armature of said solenoid comprises an annular metallic disk in said second valve chamber, said second and fourth valve seats are frusto-conical in shape and said second resilient valve member is ball-shaped to sealing seat in said frusto-conical seats and grooved thereabout to receive said armature.
Claim 13
Dependent Claim
325 words
A solenoid actuated valve comprising, a housing defining an open-ended valve chamber therein, a first frusto-conical valve seat sealingly disposed at one open end of said chamber, a second frusto-conical valve seat sealingly disposed at the other end of said chamber, said chamber further having an outlet opening remote from said valve seats and disposed in said open end containing said first valve seat, and an outlet port in said housing communicating with said outlet opening, a first inlet in said housing at a first pressure communicating with said first valve seat, a fixed fitting in said housing defining a second inlet at a second pressure communicating with said second valve seat, a solenoid coil and spool encircling said fitting, a resilient ball-like valve member disposed in said valve chamber between said first and second valve seats and having a circumferentially extending recess formed thereabout, an annular metallic disk defining the armature of said coil, said disk received within said recess so as to be secured to said resilient valve member and disposed entirely in said valve chamber, spring means in said valve chamber normally biasing said armature and said valve member into sealing contact with said first valve seat to permit communication of said second inlet with said outlet port, and said housing further including a first casing section having a flanged end and a second annular casing section receiving said fitting and said spool, said spool having top and bottom radial flanges, an annular axially extending leg extending beneath said bottom radial flange about which said coil is wound and having a third radial flange extending outwardly from the bottom thereof, said second casing extending along said annular leg and having abutting engagement with said top radial flange and being crimped about said top radial flange and said housing flanged end, and said valve chamber defined by said flanged end of said valve housing and said top and bottom flanges of said spool.
Claim 14
Dependent Claim
325 words
A solenoid actuated valve comprising, a housing defining an open-ended valve chamber therein, a first frusto-conical valve seat sealingly disposed at one open end of said chamber, a second frusto-conical valve seat sealingly disposed at the other end of said chamber, said chamber further having an outlet opening remote from said valve seats and disposed in said open end containing said first valve seat, and an outlet port in said housing communicating with said outlet opening, a first inlet in said housing at a first pressure communicating with said first valve seat, a fixed fitting in said housing defining a second inlet at a second pressure communicating with said second valve seat, a solenoid coil and spool encircling said fitting, a resilient ball-like valve member disposed in said valve chamber between said first and second valve seats and having a circumferentially extending recess formed thereabout, an annular metallic disk defining the armature of said coil, said disk received within said recess so as to be secured to said resilient valve member and disposed entirely in said valve chamber, spring means in said valve chamber normally biasing said armature and said valve member into sealing contact with said first valve seat to permit communication of said second inlet with said outlet port, and said housing further including a first casing section having a flanged end and a second annular casing section receiving said fitting and said spool, said spool having top and bottom radial flanges, an annular axially extending leg extending beneath said bottom radial flange about which said coil is wound and having a third radial flange extending outwardly from the bottom thereof, said second casing extending along said annular leg and having abutting engagement with said top radial flange and being crimped about said top radial flange and said housing flanged end, and said valve chamber defined by said flanged end of said valve housing and said top and bottom flanges of said spool.
Claim 15
Dependent Claim
56 words
The solenoid actuated valve of claim 9 wherein an annular seal is received within a recess in said flanged end of said first casing section and abutted by said top radial flange of said spool to effect sealing of said valve chamber when said second casing is crimped about said flanged end of said first housing.
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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) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |