Electricity: conductors and insulators – Overhead – Towers – poles or posts
Reexamination Certificate
1999-06-15
2001-05-22
Dinkins, Anthony (Department: 2831)
Electricity: conductors and insulators
Overhead
Towers, poles or posts
C174S046000, C174S050550, C174S135000
Reexamination Certificate
active
06235989
ABSTRACT:
BACKGROUND OF THE INVENTION
The invention concerns a protective device for the power cable of a submerged pump in which the power cable passes into the pump head, wherein there is provided a protective hose which surrounds the power cable and which is secured to the pump head.
A protective device of that kind is known from U.S. Pat. No. 2,627,816 and U.S. Pat. No. 2,969,740. The protective hose of those known protective devices however only serves to form a fluid-tight closure to the pump head in order to prevent fluid from penetrating into the motor compartment of the submerged pump.
In general submerged pumps are lowered into the trenches on the power cable. As that cable is neither designed for nor is suitable for a loading of that kind, fault situations frequently occur.
In addition, upon being lowered into the trench, the cable can become hooked up or jammed or otherwise damaged.
Therefore the object of the invention is to propose a structure which permits the submerged pump to be safely and reliably lowered and which affords the power cable protection.
BRIEF DESCRIPTION OF THE INVENTION
In accordance with the invention, in a protective device of the kind set forth in the opening part of this specification, that object is attained in that the protective hose is secured as a lowering aid to the pump head for avoiding loadings on the power cable when lowering the submerged pump.
In accordance with the invention the submerged pump is no longer lowered into the trench by way of the power cable but by way of the protective hose so that the power cable is free from any loading of that kind.
The gripping device can be a conventional gripping ring.
In another embodiment, a first clamping portion is rigidly connected to the pump head, and a second clamping portion can be fixed, with the inclusion of the protective hose, to the first clamping portion in the region of the clamping sleeve.
Both in the first embodiment and also in the second embodiment a secure connection is produced between the protective hose and the submerged pump without the power cable being loaded. On the contrary it passes into the pump head in loose relationship therewith.
A further clamping sleeve can be provided at the end of the protective hose remote from the pump head, within the protective hose, through which further clamping sleeve the power cable is movably guided, and there can be provided a gripping device which engages the protective hose from the exterior for clamping the protective hose fast to the clamping sleeve, in which case the gripping device can be securable to a pull or tension cable.
Preferably the gripping device has a loop for securing a pull cable.
The pull cable serves if required for increasing the length of the protective hose if the length thereof when lowering the submerged pump into the trench should not be sufficient.
Advantageously the protective hose is provided thereon with length markings, by reference to which it is possible to read off how deep the submerged pump is in the water.
The protective hose can be an inexpensive mass-produced item so that the structure according to the invention is correspondingly inexpensive. It protects the power cable from bending, knocks and jamming, as can occur in trenches. The arrangement affords a particularly good grip by virtue of the thickness of the protective hose.
REFERENCES:
patent: 2627816 (1953-02-01), Kaatz
patent: 2969740 (1961-01-01), Kaatz
patent: 4328619 (1982-05-01), Lefevre et al.
patent: 5435507 (1995-07-01), Murphy
patent: 5443232 (1995-08-01), Kesinger et al.
patent: 5580239 (1996-12-01), Jang
patent: 5587555 (1996-12-01), Rinderer
patent: 5700977 (1997-12-01), Ford et al.
patent: 5769603 (1998-06-01), Fujiwara et al.
patent: 5817980 (1998-10-01), Kirma
patent: 6003559 (1999-12-01), Baker
Dinkins Anthony
EMU Unterwasserpumpen GmbH
Estrada Angel R.
Schweitzer Cornman Gross & Bondell LLP
LandOfFree
Protective device for the power cable of a submerged pump does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Protective device for the power cable of a submerged pump, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Protective device for the power cable of a submerged pump will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2463322