Fill port for a self-priming centrifugal pump, with safety device

Inactive Publication Date: 2007-03-29
ENVIROTECH PUMPSYSTEMS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0013] The retaining clamp of the safety device of the present invention may also be structured with recesses or depressions at either end of the retaining clamp in order to accommodate the head of a socket cap head screw in the retaining clamp as the clamp is connected to the pump casing. The depressions retain the head of the screws and prevent the retaining clamp from releasing away from the screws or the fill port cover.
[0014] The three s

Problems solved by technology

As a result, the fluid level in the suction chamber is very low making re-priming of the pump very difficult.
However, low fluid levels may occur for a number of reasons, including back siphoning of fluid from the pump.
Accessing the interior of the pump through the fill port can be extremely dangerous, however, especiall

Method used

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  • Fill port for a self-priming centrifugal pump, with safety device
  • Fill port for a self-priming centrifugal pump, with safety device
  • Fill port for a self-priming centrifugal pump, with safety device

Examples

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Example

[0022] The fill port safety device of the present invention is best illustrated by a comparison with conventional fill port covers, an example of which is depicted in FIGS. 1-3. In particular, FIG. 1 illustrates the top of a pump casing 10 having a fill port 12 positioned near the outlet 14 of the pump. The prior art closure 16 of the fill port 12 comprises a flattened gasket 18 that is sized to fit about the fill port 12 opening and is positioned to be held in place by a fill port cover 20. A retaining clamp 22 is provided for positioning over the fill port cover 20 and is secured to the pump casing 10 by square-head bolts 24, 26 that threadingly connect to threaded holes 28, 30 in the pump casing 10 located on either side of the fill port 12. The retaining clamp 22 is configured with U-shaped openings 32, 33 at either end of the clamp 22 to receive the bolts 24,26.

[0023] An L-shaped anchor bolt 34 is threaded through a central opening 36 in the retaining clamp 22. As best seen in...

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Abstract

A safety cover for the fill port of a self-primer pump is structured to improve the seal between the fill port cover and the fill port in the pump casing to thereby control the release of steam from the pump, and includes an improved sealing band between the fill port and fill port cover, an improved fill port cover design and an improved retaining clamp design.

Description

CROSS-REFERENCE TO RELATED APPLICATION [0001] This application is a non-provisional application claiming priority to provisional patent application Ser. No. 60 / 707,097 filed Aug. 10, 2005.BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] This invention relates to self-primer centrifugal pumps, and specifically relates to a fill port assembly having improved safety construction. [0004] 2. Description of Related Art [0005] Self-priming centrifugal pumps are well-known and frequently used in industries where processing fluids with entrained solids is required. Self-primer pumps, also known as trash pumps, are characterized as having a casing which houses a suction chamber and a separation chamber divided by a wall or plenum. An impeller positioned in a volute section of the pump receives fluid from the suction chamber and delivers it by centrifugal action into the separation chamber where it is eventually expelled through an outlet. [0006] In operation of a self-prime...

Claims

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Application Information

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IPC IPC(8): F04B53/00
CPCF04D9/003
Inventor SHAW, JAMES G.NORTHRUP, JAMES
Owner ENVIROTECH PUMPSYSTEMS INC
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