Patent US3662725A successfully refreshed from Google Patents.
US3662725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Evaporation emission control device for fuel tanks
Assignee: Motorola Solutions Inc
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Filing: 1970-08-26
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Granted: 1972-05-16
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Expires: 1990-08-26
Abstract
Abstract An evaporation control device consists of two spherical balls which float in a housing defining a cavity so that the balls move up and down in accordance with the fuel level in the tank to allow the top ball to engage a conical seat to seal the vented passageway from the fuel tank to the engine. The spherical contact surfaces between the two balls allow quick and easy movement of the top ball to seal the opening at once where gasoline moves toward the opening.
Inventors
- 👤 James W Dragon
- 👤 Alfred G Ocken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:12
CPC Classifications
F; F02; F02M; F02M25/00; F02M25/08; F02M25/0836; F02M25/0872; F16; F16K; F16K24/00; F16K24/04; F16K24/042; F16K24/044; F16K24/046; Y; Y10; Y10T; Y10T137/00; Y10T137/0753; Y10T137/0898; Y10T137/2931; Y10T137/3003; Y10T137/3084; Y10T137/309; Y10T137/3099
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
190 words
A system for controlling the evaporation emissions from a fuel tank having a filler neck and a fuel line for delivering the fuel from the tank to the engine, including in combination, vent means including a housing extending into the fuel tank, said housing defining a cavity and having a foraminous wall portion exposing the cavity to the interior of the fuel tank, conduit means connecting the housing to the engine for transfer of volatile gas fumes thereto for disposal therein, ball seat means formed in a wall of said housing and having an opening connecting the cavity thereof to said conduit means, a spherical valve member positioned in said housing and engageable with said ball seat means for sealing said conduit means, and float means positioned in said housing and having a spherical surface portion for engaging said spherical valve member to move said spherical valve member into engagement with said ball seat means when said float means is elevated by the fuel level within the fuel tank being tilted from a horizontal reference plane through a plurality of angles up to at least 30* from said reference plane.
Claim 2
Independent Claim
190 words
A system for controlling the evaporation emissions from a fuel tank having a filler neck and a fuel line for delivering the fuel from the tank to the engine, including in combination, vent means including a housing extending into the fuel tank, said housing defining a cavity and having a foraminous wall portion exposing the cavity to the interior of the fuel tank, conduit means connecting the housing to the engine for transfer of volatile gas fumes thereto for disposal therein, ball seat means formed in a wall of said housing and having an opening connecting the cavity thereof to said conduit means, a spherical valve member positioned in said housing and engageable with said ball seat means for sealing said conduit means, and float means positioned in said housing and having a spherical surface portion for engaging said spherical valve member to move said spherical valve member into engagement with said ball seat means when said float means is elevated by the fuel level within the fuel tank being tilted from a horizontal reference plane through a plurality of angles up to at least 30* from said reference plane.
Claim 3
Dependent Claim
39 words
The device of claim 1 wherein said housing is a cylindrical member open at one end thereof which extends into said fuel tank and said foraminous wall is a screen which covers the open end of said cylindrical member.
Claim 4
Dependent Claim
13 words
The device of claim 1 wherein said float means is a floatable ball.
Claim 5
Dependent Claim
70 words
The device of claim 1 wherein said housing is a cylindrical member open at one end and said foraminous wall is a screen covering said open end, said cylindircal member having a given diameter, said spherical member having a diameter greater than half the diameter of said given diameter of said cylindrical member, and said float means has a diameter greater than one half the diameter of said cylindrical member.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |