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Variable Speed Explosion Proof Blender Drive

IP.com Disclosure Number: IPCOM000053125D
Original Publication Date: 1981-Sep-01
Included in the Prior Art Database: 2005-Feb-12
Document File: 2 page(s) / 91K

Publishing Venue

IBM

Related People

Creekmore, FM: AUTHOR [+2]

Abstract

The need for explosion-proof blenders for laboratory environments in potentially hazardous atmospheres is well recognized, and explosion-proof motors for such blenders are available. Existing explosion-proof blenders are single-speed and thus do not lend themselves readily to use in research and laboratory conditions where a variation of blending speed is desirable.

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Variable Speed Explosion Proof Blender Drive

The need for explosion-proof blenders for laboratory environments in potentially hazardous atmospheres is well recognized, and explosion-proof motors for such blenders are available. Existing explosion-proof blenders are single-speed and thus do not lend themselves readily to use in research and laboratory conditions where a variation of blending speed is desirable.

This article describes a technique for rendering a blender operable at multiple speeds as well as being explosion-proof.

The blender 10 (Fig. 1) is comprised of a base 12 and blender drive unit 14. Drive unit 14 further acts to hold the blender container 16 during operation.

Motive power for the explosion-proof, variable speed drive is provided by means of a rotary vane air motor 18, such as, by way of example, model 4AM- NRV-70A manufactured by Gast Air Motors. This device is such that speed may be varied from 300 to 3000 RPM.

Air is supplied through a filter 28 and pressure regulator 30. After the air passes to the pressure regulator 30, it is then passed through an oiler 34 to provide some lubrication to the air motor 18.

The supply hose 36 may be connected to any suitable compressed air supply, either a dedicated compressor or a permanently mounted air supply line having pressures up to 100 PSI, and the speed of the blender controlled either by the pressure regulator 30 or by a supplementary valve.

The drive of the air motor is transmittcd from the driv...