US3885714A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for coupling pump units to outlets under water
Assignee: TDK Micronas GmbH
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Filing: 1974-04-19
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Granted: 1975-05-27
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Expires: 1994-04-19
Abstract
Abstract A system is disclosed for placing sewage disposal pumps into contact with outlet pipes without attaching the pumps to the pipes with bolts and the like. The pumps can then be removed for maintenance work and replaced without extending tools underwater to release or secure bolts. A locking pawl is placed on the outlet pipe which can be operated from a point above the water surface and which in one position locks the pump against its guides thereby to secure contact between the pump and the outlet pipe.
Inventors
- 👤 Evert Sjostrand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:59
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/60; F04D29/605; F04D29/606; F04D29/607
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
132 words
A locking device for submersible pumps arranged as a releasable connection between a pump unit and a usually submerged outlet pipe, comprising guide means attached to a pump unit, said guide means including spaced upper and lower sleeve adapted to slide along a substantially vertical guide when a pump unit is being lowered or raised, a locking pawl, means for operating said locking pawl from a position above a water surface when said pump unit is submerged, said locking pawl including means engaging said upper sleeve for securing the pump unit by pressing the upper sleeve against one side of the substantially vertical guide while pressing the lower sleeve against the opposite side of the vertical guide to rotate the guide means and press the pump unit securely against the outlet pipe.
Claim 2
Dependent Claim
132 words
A locking device for submersible pumps arranged as a releasable connection between a pump unit and a usually submerged outlet pipe, comprising guide means attached to a pump unit, said guide means including spaced upper and lower sleeve adapted to slide along a substantially vertical guide when a pump unit is being lowered or raised, a locking pawl, means for operating said locking pawl from a position above a water surface when said pump unit is submerged, said locking pawl including means engaging said upper sleeve for securing the pump unit by pressing the upper sleeve against one side of the substantially vertical guide while pressing the lower sleeve against the opposite side of the vertical guide to rotate the guide means and press the pump unit securely against the outlet pipe.
Claim 3
Dependent Claim
23 words
A device according to claim 1, in which means are provided by which the locking pawl is pivotedly attached to the outlet pipe.
Claim 4
Dependent Claim
26 words
A device according to claim 2, in which the locking pawl is operated from a point above the water surface by means of an operating device.
Claim 5
Dependent Claim
58 words
A device according to claim 3, in which the operating device includes a bar having one end attached to the locking pawl and the other end extending above the water to enable a force to be aPplied from above the water to cause the pawl to rotate and control pressure applied by the pawl to the guide means.
Claim 6
Dependent Claim
29 words
A device according to claim 1, in which suspender means are provided to pivotably support said locking pawl, and said suspender means are rigidly supported by an outlet pipe.
Claim 7
Dependent Claim
64 words
The invention as claimed in claim 1, in which the outlet pipe includes a coupling unit and the guide means includes a clutch to engage said coupling unit, said clutch and coupling unit in cooperation with the lower sleeve opening serving as a pivot for the pump unit and guide means when the locking pawl presses the upper sleeve opening against the vertical guide.
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) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |