US3604820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor-driven pump
Assignee: Loewe Pumpenfabrik GmbH
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Filing: 1969-06-20
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Granted: 1971-09-14
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Expires: 1989-06-20
Abstract
Abstract A power pump including a dry-operating drive motor mounted on the pump housing and connected to a pump impeller, wherein the output shaft includes a seal consisting of a slipring and a contrarotating ring which is coupled to an elastic noise damper on the pump housing.
Inventors
- 👤 Winfrid Scheller
- 👤 Harry Zimmermann
- 👤 Gunther Boes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:22
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/12; F; F04; F04D; F04D29/00; F04D29/60; F04D29/62; F04D29/628; F04D29/66; F04D29/669; F05; F05B; F05B2260/00; F05B2260/96
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
202 words
An apparatus for vibrationally isolating a motor from a pump, comprising: a motor having an output shaft; a pump impeller connected to said shaft; a pump housing surrounding said impeller, and having a suction chamber and a pressure chamber; at least one elastic noise-damping O-ring positioned within said pump housing for providing vibrational and structural isolation of said packing means from said motor; and shaft-packing means disposed within said housing around said output shaft, said packing means including a stationary seal, wherein said motor, packing means and impeller form a single structural unit, including a cover plate having at least one seat concentric with said output shaft, an internal housing having a grinding plate at its anterior wall adjacent to said impeller and protruding cylindrical lip concentrically disposed in said noise-damping O-ring, a contrarotating ring concentrically disposed in said housing while disposed on said shaft, a seal communicatively positioned between said contrarotating ring and said housing so as to be fluid tight, and at least one elastic-type O-ring positioned so as to be communicative while concentric with said protruding lip of said housing and said seat of said cover plate providing a complete structural unit of said packing means for vibrational isolation.
Claim 2
Independent Claim
202 words
An apparatus for vibrationally isolating a motor from a pump, comprising: a motor having an output shaft; a pump impeller connected to said shaft; a pump housing surrounding said impeller, and having a suction chamber and a pressure chamber; at least one elastic noise-damping O-ring positioned within said pump housing for providing vibrational and structural isolation of said packing means from said motor; and shaft-packing means disposed within said housing around said output shaft, said packing means including a stationary seal, wherein said motor, packing means and impeller form a single structural unit, including a cover plate having at least one seat concentric with said output shaft, an internal housing having a grinding plate at its anterior wall adjacent to said impeller and protruding cylindrical lip concentrically disposed in said noise-damping O-ring, a contrarotating ring concentrically disposed in said housing while disposed on said shaft, a seal communicatively positioned between said contrarotating ring and said housing so as to be fluid tight, and at least one elastic-type O-ring positioned so as to be communicative while concentric with said protruding lip of said housing and said seat of said cover plate providing a complete structural unit of said packing means for vibrational isolation.
Claim 3
Dependent Claim
40 words
The pump according to claim 1 additionally comprising a gap seal disposed between the suction and pressure chambers of said pump housing, said gap seal being included in said structural unit and coupled to said housing through said damping means.
Claim 4
Dependent Claim
36 words
The apparatus as recited in claim 1 additionally comprising a cover hood surrounding said motor and disposed over said cover plate, including at its opposite end a supporting member mounted at the end of said motor.
Claim 5
Dependent Claim
25 words
The apparatus as recited in claim 3, wherein said impeller is laterally closed on both sides, and said unit is provided with a splitring housing.
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) | 1974-09-13 | 1975-03-15 | 1975-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-13 | 1979-03-15 | 1979-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-13 | 1983-03-15 | 1983-09-14 | $7700.00 | Window Closed / Lapsed |