US5605448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
AC fuel pump
Assignee: Paragon Products LLC
•
Filing: 1995-07-31
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Granted: 1997-02-25
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Expires: 2015-07-31
Abstract
Abstract An AC pump sutiable for use in a locomotive having a DC auxiliary electrical system. The pump includes an AC motor having a housing and a vertically mounted rotor. A pumpbody is clamped into place by a cap, which in turn is mounted to the housing by bolts which are readily accessible from above. A DC-AC inverter is housed in the cap. By removing the cap, the pump body can be removed, and the pump components can be accessed without disconnecting the DC-AC inverter from the DC current source.
Inventors
- 👤 Thomas B. Martin, Sr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:31
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/30; F04C2/34; F04C2/344; F04C2/3441; F04C2/3442; F01; F01C; F01C21/00; F01C21/08; F02; F02M; F02M37/00; F02M37/04; F02M37/08; F04C11/00; F04C11/008; H; H02; H02K; H02K11/00; H02K11/30; H02K11/33; F04C2240/00; F04C2240/40; F04C2240/403; F04C2240/60
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
111 words
A pump comprising: an AC motor having a housing and a rotor mounted vertically in the housing; a cap removably secured to the housing; a pump body clamped between the housing and the cap, the pump body and the housing cooperatively defining a pump cavity; the rotor having an upper end extending into the pump cavity; pump means within the pump cavity and operatively connected to the rotor upper end; an inlet port and an outlet port in communication with the pump cavity; and a DC-AC inverter mounted within the cap and having an output electrically connected to the AC motor and an input electrically connected to a DC current source.
Claim 2
Dependent Claim
111 words
A pump comprising: an AC motor having a housing and a rotor mounted vertically in the housing; a cap removably secured to the housing; a pump body clamped between the housing and the cap, the pump body and the housing cooperatively defining a pump cavity; the rotor having an upper end extending into the pump cavity; pump means within the pump cavity and operatively connected to the rotor upper end; an inlet port and an outlet port in communication with the pump cavity; and a DC-AC inverter mounted within the cap and having an output electrically connected to the AC motor and an input electrically connected to a DC current source.
Claim 3
Dependent Claim
29 words
A pump according to claim 1 further comprising the cap, the pump and rotor being removable from the housing with the DC-AC inverter connected to the DC current source.
Claim 4
Dependent Claim
31 words
A pump according to claim 1 wherein the pump means comprises a first gear drivingly mounted on the rotor upper end, and a second gear drivably engaged with the first gear.
Claim 5
Dependent Claim
22 words
A pump according to claim 1 wherein the pump means comprises first and second vanes slidably mounted on the rotor upper end.
Claim 6
Dependent Claim
30 words
A pump according to claim 1 which further comprises surfaces defining a liquid flow path from the pump cavity into the housing, and from the housing into the inlet port.
Claim 7
Dependent Claim
33 words
A pump according to claim 5 wherein the liquid flow path includes a first channel between the pump cavity and the housing and a second channel between the housing and the inlet port.
Claim 8
Dependent Claim
21 words
A pump according to claim 1 wherein the DC-AC inverter input electrically connected to a DC current source includes a rectifier.
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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) | 2000-02-25 | 2000-08-26 | 2001-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-02-25 | 2004-08-26 | 2005-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-02-25 | 2008-08-26 | 2009-02-25 | $7700.00 | Window Closed / Lapsed |