US3568651A
Expired / Lapsed
US
⏱️ 0.0 years remaining
An intake manifold electrical vacuum control for an internal combustion engine equipment
Assignee: Individual
•
Filing: 1969-04-21
•
Granted: 1971-03-09
•
Expires: 1989-04-21
Abstract
Abstract An automatic intake manifold electrical vacuum control device for an internal combustion engine comprising, a primary ignition circuit, an actuating circuit featuring a switching relay whose coil is in series with a filter choke, said actuating circuit energized by an electrical pulse beat from the grounded primary side of the ignition coil and an operational circuit comprising said switching relay actuating contacts in series with a throttle micro switch also in series with an electric air solenoid valve and the series circuit completed and powered by the automotive battery.
Inventors
- 👤 Norman E Waag
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:34
CPC Classifications
F; F02; F02P; F02P5/00; F02P5/04; F02P5/05; F02P5/10; F02P5/103; Y; Y10; Y10S; Y10S261/00; Y10S261/19
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
126 words
An intake manifold electrical vacuum control as described comprising an internal combustion engine electrical ignition circuit, a battery connected thereto, an electrical control actuating circuit having a filter choke therein and with said circuit connected to said ignition circuit, an electrical control operating circuit connected to said actuating circuit, an electric solenoid air valve connected to said operating circuit, said solenoid air valve having an inlet and outlet air tube connected thereto, said outlet air tube connected to the intake manifold of said engine whereby said ignition circuit and actuating circuit energize said operating circuit to control the partial vacuum pressure in said engine intake manifold to prevent unnecessary fuel and oil consumption and reduce air pollution caused by improper combustion of the fuel during deceleration.
Claim 2
Dependent Claim
126 words
An intake manifold electrical vacuum control as described comprising an internal combustion engine electrical ignition circuit, a battery connected thereto, an electrical control actuating circuit having a filter choke therein and with said circuit connected to said ignition circuit, an electrical control operating circuit connected to said actuating circuit, an electric solenoid air valve connected to said operating circuit, said solenoid air valve having an inlet and outlet air tube connected thereto, said outlet air tube connected to the intake manifold of said engine whereby said ignition circuit and actuating circuit energize said operating circuit to control the partial vacuum pressure in said engine intake manifold to prevent unnecessary fuel and oil consumption and reduce air pollution caused by improper combustion of the fuel during deceleration.
Claim 3
Dependent Claim
53 words
The intake manifold electrical vacuum control defined in claim 1 in which the said electrical actuating circuit has said filter choke, a switching relay and a shutoff switch receiving their power or e.m.f. from the ground side of the primary winding of the automotive ignition coil said ignition circuit including a standard condenser.
Claim 4
Dependent Claim
42 words
The intake manifold electrical vacuum control as defined in claim 2 in which the filter choke is connected in series with the relay switch in said switching relay coil thereby reducing the vibration of the relay switch during ignition breaker point oscillation.
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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) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |