US5362209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Proportional solenoid actuator and pump system including same
Assignee: AIL Corp
•
Filing: 1991-05-23
•
Granted: 1994-11-08
•
Expires: 2011-05-23
Abstract
Abstract An actuator for moving a solenoid armature to control fuel in response to a control current is built into a fuel pump, with trapped air in and around the actuator preventing contamination of the actuator by ferromagnetic particles in the liquid fuel from the fuel pump.
Inventors
- 👤 Eric Day
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:03
CPC Classifications
F; F02; F02D; F02D1/00; F02D1/02; F02D1/08; H; H01; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/13; H01F7/16; H01F7/1607
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
168 words
A combination diesel fuel pump and fuel control actuator for said pump comprising: a fuel pump housing containing said fuel pump and having a cavity at the top thereof, one part of which communicates with the interior of the portion of said housing containing said pump and the remainder of which is air-tight; a solenoid actuator in said cavity comprising a solenoid and a spring-biased armature movable in said solenoid in response to changes in current in said solenoid; a fuel-control linkage in said housing for controlling the quantity of fuel delivered by said pump; connecting means responsive to motion of said armature to operate said fuel-control linkage; a body of liquid diesel fuel in said housing; connecting means extending from said armature to said fuel-control linkage and responsive to motion of said armature to move said fuel-control linkage; and a body of trapped air permeating the interior of said cavity and preventing ferromagnetic particles in said diesel fuel oil from contacting the working parts of said actuator.
Claim 2
Dependent Claim
168 words
A combination diesel fuel pump and fuel control actuator for said pump comprising: a fuel pump housing containing said fuel pump and having a cavity at the top thereof, one part of which communicates with the interior of the portion of said housing containing said pump and the remainder of which is air-tight; a solenoid actuator in said cavity comprising a solenoid and a spring-biased armature movable in said solenoid in response to changes in current in said solenoid; a fuel-control linkage in said housing for controlling the quantity of fuel delivered by said pump; connecting means responsive to motion of said armature to operate said fuel-control linkage; a body of liquid diesel fuel in said housing; connecting means extending from said armature to said fuel-control linkage and responsive to motion of said armature to move said fuel-control linkage; and a body of trapped air permeating the interior of said cavity and preventing ferromagnetic particles in said diesel fuel oil from contacting the working parts of said actuator.
Claim 3
Dependent Claim
32 words
The combination of claim 1, wherein said cavity is tubular and extends horizontally, the top level of said fuel lies below said cavity, and said solenoid actuator is a linear solenoid actuator.
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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) | 1997-11-07 | 1998-05-09 | 1998-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-11-07 | 2002-05-09 | 2002-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-11-07 | 2006-05-09 | 2006-11-08 | $7700.00 | Window Closed / Lapsed |