US4824332A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reversible pump assembly
Assignee: Ctex Seat Comfort Ltd
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Filing: 1988-03-07
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Granted: 1989-04-25
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Expires: 2008-03-07
Abstract
Abstract A windshield washer pump including comprising an impeller chamber having a reversible impeller rotatably mounted therein and an inlet for windshield washer fluid communicating therewith. Dual outlets communicate between the impeller chamber and opposite ends of an adjacent outlet chamber. A piston is slidably mounted in the outlet chamber intermediate axially aligned tubular discharge passages extending from the outlet chamber. Oppositely disposed projections are formed on the piston for being alternately urged into engagement with the tubular discharge passages, permitting the alternate pumping of fluid through the tubular discharge passages.
Inventors
- 👤 Jimmie G. Perkins
- 👤 James W. Grim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:02
CPC Classifications
F; F04; F04D; F04D15/00; F04D15/0005; F04D15/0016; B; B60; B60S; B60S1/00; B60S1/02; B60S1/46; B60S1/48; B60S1/481; F04D29/00; F04D29/40; F04D29/42; F04D29/44; F04D29/46; F04D29/48; F04D29/486
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
134 words
A windshield washer pump assembly comprising an impeller chamber, a reversible impeller rotatably mounted in the impeller chamber, an inlet for windshield washer fluid communicating with the impeller chamber, an outlet chamber, dual outlets communicating between the impeller chamber and opposite ends of the outlet chamber, a piston slidably mounted in the outlet chamber, axially aligned tubular discharge passages extending from the outlet chamber, oppositely disposed projections formed on said piston for being alternatively urged into engagement with said tubular discharge passages for alternately pumping fluid through the tubular discharge passages wherein said outlet chamber and said piston and cylindrically shaped, with said piston having conically shaped recesses formed in opposite ends thereof and bottoming out in respective flat surfaces, said projection being a concentric, conically shaped projection formed on each flat bottom surface.
Claim 2
Dependent Claim
134 words
A windshield washer pump assembly comprising an impeller chamber, a reversible impeller rotatably mounted in the impeller chamber, an inlet for windshield washer fluid communicating with the impeller chamber, an outlet chamber, dual outlets communicating between the impeller chamber and opposite ends of the outlet chamber, a piston slidably mounted in the outlet chamber, axially aligned tubular discharge passages extending from the outlet chamber, oppositely disposed projections formed on said piston for being alternatively urged into engagement with said tubular discharge passages for alternately pumping fluid through the tubular discharge passages wherein said outlet chamber and said piston and cylindrically shaped, with said piston having conically shaped recesses formed in opposite ends thereof and bottoming out in respective flat surfaces, said projection being a concentric, conically shaped projection formed on each flat bottom surface.
Claim 3
Dependent Claim
130 words
A windshield washer pump assembly comprising an impeller chamber, a reversible impeller rotatably mounted in the impeller chamber, an inlet for windshield washer fluid communicating with the impeller chamber, an outlet chamber, dual outlets communicating between the impeller chamber and opposite ends of the outlet chamber, a piston slidably mounted in the outlet chamber, axially aligned tubular discharge passages extending from the outlet chamber, oppositely disposed shaped projections formed on said piston for being alternatively urged into engagement with said tubular discharge passages for alternatively pumping fluid through the tubular discharge passages, and chamfered ends formed on the inner ends of the respective tubular discharge passages for cooperation with said oppositely disposed shaped projections to form a seal at the cooperating surfaces of the chamfered ends and the shaped projections.
Claim 4
Dependent Claim
130 words
A windshield washer pump assembly comprising an impeller chamber, a reversible impeller rotatably mounted in the impeller chamber, an inlet for windshield washer fluid communicating with the impeller chamber, an outlet chamber, dual outlets communicating between the impeller chamber and opposite ends of the outlet chamber, a piston slidably mounted in the outlet chamber, axially aligned tubular discharge passages extending from the outlet chamber, oppositely disposed shaped projections formed on said piston for being alternatively urged into engagement with said tubular discharge passages for alternatively pumping fluid through the tubular discharge passages, and chamfered ends formed on the inner ends of the respective tubular discharge passages for cooperation with said oppositely disposed shaped projections to form a seal at the cooperating surfaces of the chamfered ends and the shaped projections.
References Cited (Backward Citations)
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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) | 1992-04-24 | 1992-10-24 | 1993-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-24 | 1996-10-24 | 1997-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-24 | 2000-10-24 | 2001-04-25 | $7700.00 | Window Closed / Lapsed |