Patent US3659964A successfully refreshed from Google Patents.
US3659964A
Expired / Lapsed
US
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Self-coupling pump unit
Assignee: Xylem Water Solutions AB
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Filing: 1970-08-27
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Granted: 1972-05-02
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Expires: 1990-08-27
Abstract
Abstract An immersible pump unit comprising a liquidtight motor and a pump with a lateral connection and guiding means which, on lowering of the pump unit, guides the pump connection to the vicinity of a coupling unit, the pump unit being suspended so that the central axis of the pump runs slightly obliquely downwards, there being close to the coupling unit a support for the pump unit in its lowered position. There is in the extension of the coupling unit beyond the support, at least one stop with an inclined plane facing the coupling unit, the point of contact between the pump unit and the inclined plane of the stop lying a distance below an imaginary line of operation for the force of reaction generated at the connection and coupling unit by the pump pressure.
Inventors
- 👤 Jens Karl Adolf Dahlgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:45
CPC Classifications
F; F16; F16L; F16L37/00; F16L37/26; F04; F04D; F04D29/00; F04D29/60; F04D29/605; F04D29/606; F04D29/607
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
153 words
A pump unit immersible in a liquid and consisting of a liquidtight-enclosed motor and pump for pumping liquid into an output conduit comprising: a housing; a connection member extending laterally out of the pump housing and terminating in a flange with a lower support portion; a base member having a camming stop member; at least one corresponding stop member positioned on the housing, and a coupling member having a lower support member for supporting the flange support portion, the coupling member positioned at such a distance relative to the camming stop member that any reaction force generated during the pumping action along the axial length of the connection member will be above the contact point of the housing stop and base member stop thereby creating a torque force about the contact point that increases the sealing contact force between the connection member flange and coupling member in direct relation to the torque force.
Claim 2
Dependent Claim
153 words
A pump unit immersible in a liquid and consisting of a liquidtight-enclosed motor and pump for pumping liquid into an output conduit comprising: a housing; a connection member extending laterally out of the pump housing and terminating in a flange with a lower support portion; a base member having a camming stop member; at least one corresponding stop member positioned on the housing, and a coupling member having a lower support member for supporting the flange support portion, the coupling member positioned at such a distance relative to the camming stop member that any reaction force generated during the pumping action along the axial length of the connection member will be above the contact point of the housing stop and base member stop thereby creating a torque force about the contact point that increases the sealing contact force between the connection member flange and coupling member in direct relation to the torque force.
Claim 3
Dependent Claim
22 words
A pump unit as in claim 1, where the lower support portion of the connection member flange is a protruding stud member.
Claim 4
Dependent Claim
17 words
A pump unit as in claim 1, where the coupling member is integral with the base member.
Claim 5
Dependent Claim
22 words
A pump unit as in claim 1, where the sealing surface of the connection member flange and the coupling member is spherical.
Claim 6
Dependent Claim
40 words
A pump unit as in claim 1, further including a suspension device adapted to connect the housing to a cable or the like, the suspension device positioned on the housing so that the connection member is inclined downward while suspended.
Claim 7
Dependent Claim
22 words
A pump unit as in claim 2, where the lower support member is positioned beneath and outward of the Coupling member opening.
Claim 8
Dependent Claim
22 words
A pump unit as in claim 6, where the spherical connection member flange is adapted to surround the coupling member sealing surface.
References Cited (Backward Citations)
US3234885A
Cited
US3427982A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |