US3659575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum breaker for automobile engines
Assignee: Individual
•
Filing: 1970-11-09
•
Granted: 1972-05-02
•
Expires: 1990-11-09
Abstract
Abstract A device for reducing the vacuum in the induction manifold of an engine and supplying additional air to said engine, having a spring-loaded, normally closed, one-way valve adapted to be controlled by the vacuum in the manifold, and a tubing leading from said valve to the manifold of the engine, said valve being substantially loaded by a constant counterforce means and to a smaller extent by spring force, said valve and tubing being arranged to pass air through the valve and tubing to the manifold when the valve is open. In a preferred embodiment, the valve is damped against vibrations.
Inventors
- 👤 Leif Lokka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:53
CPC Classifications
F; F02; F02M; F02M23/00; F02M23/04; F02M23/08; F02M23/006; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7748; Y10T137/7749
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
90 words
A device for reducing the vacuum In the induction manifold of an engine and supplying additional air to said engine, comprising a spring-loaded, normally closed, one-way valve adapted to be controlled by the vacuum in the manifold, and a tubing leading from said valve to the manifold of the engine, said valve being substantially loaded by a constant counterforce means and to a smaller extent by spring force, said valve and tubing being arranged to pass air through the valve and tubing to the manifold when the valve is open.
Claim 2
Independent Claim
90 words
A device for reducing the vacuum In the induction manifold of an engine and supplying additional air to said engine, comprising a spring-loaded, normally closed, one-way valve adapted to be controlled by the vacuum in the manifold, and a tubing leading from said valve to the manifold of the engine, said valve being substantially loaded by a constant counterforce means and to a smaller extent by spring force, said valve and tubing being arranged to pass air through the valve and tubing to the manifold when the valve is open.
Claim 3
Dependent Claim
28 words
A device as claimed in claim 1, wherein the cross-sectional area of the valve is small compared with the cross-sectional area of the tubing leading to the manifold.
Claim 4
Dependent Claim
25 words
A device according to claim 2, including a coupling means for preventing eddy currents, said coupling means being connected between said tubing and said manifold.
Claim 5
Dependent Claim
24 words
A device as claimed in claim 1, wherein said constant counterforce means is a counterweight, the spring force being small compared with said counterweight.
Claim 6
Dependent Claim
20 words
A device as claimed in claim 1, including means for damping vibrations of said valve during operation of the device.
Claim 7
Dependent Claim
41 words
A device as in claim 5, wherein said valve has a valve stem, and said damping means is a body of liquid and a disc fixed to the lower end of the valve stem, the disc being submerged in the liquid.
Claim 8
Dependent Claim
12 words
The device as claimed in claim 6, wherein said liquid is oil.
Claim 9
Dependent Claim
107 words
In an internal combustion engine having a throttle valve, a carburetor and an induction manifold connected downstream of the carburetor, the improvement which comprises a spring-loaded, normally closed, one-way valve adapted to be controlled by the vacuum in the induction manifold, a tubing connected at one end to the valve and at the other end to the induction manifold posterior to the throttle valve and the carburetor, said valve being substantially loaded by a constant counterforce and to a smaller extent by spring force, said valve and tubing being arranged to pass air through the valve and tubing to the induction manifold when the valve is open.
Claim 10
Dependent Claim
107 words
In an internal combustion engine having a throttle valve, a carburetor and an induction manifold connected downstream of the carburetor, the improvement which comprises a spring-loaded, normally closed, one-way valve adapted to be controlled by the vacuum in the induction manifold, a tubing connected at one end to the valve and at the other end to the induction manifold posterior to the throttle valve and the carburetor, said valve being substantially loaded by a constant counterforce and to a smaller extent by spring force, said valve and tubing being arranged to pass air through the valve and tubing to the induction manifold when the valve is open.
Claim 11
Dependent Claim
16 words
A device as claimed in claim 8, wherein the valve is mounted remote from said engine.
Claim 12
Dependent Claim
93 words
In an internal combustion engine having a throttle valve, an induction manifold and a carburetor, the improvement which comprises a spring-loaded, normally closed, one-way valve adapted to be controlled by the vacuum in the induction manifold, a tubing leading from the valve to the induction manifold of the engine and being connected to the induction manifold posterior to the throttle valve and the carburetor, a counterweight attached to the valve urging the valve to the normally closed position and a damping means to inhibit or prevent vibration of said valve during operation thereof.
Claim 13
Dependent Claim
93 words
In an internal combustion engine having a throttle valve, an induction manifold and a carburetor, the improvement which comprises a spring-loaded, normally closed, one-way valve adapted to be controlled by the vacuum in the induction manifold, a tubing leading from the valve to the induction manifold of the engine and being connected to the induction manifold posterior to the throttle valve and the carburetor, a counterweight attached to the valve urging the valve to the normally closed position and a damping means to inhibit or prevent vibration of said valve during operation thereof.
References Cited (Backward Citations)
US1239639A
Cited
US1630362A
Cited
US2021337A
Cited
US2518082A
Cited
US3039449A
Cited
US3561409A
Cited
US3564580A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |