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Rotary valve

A rotary valve and rotor technology, applied in the field of rotary valves, can solve problems such as limited spacing, complexity, and difficulty in manufacturing, and achieve the effect of reducing the number of parts and simplifying the system

Active Publication Date: 2007-10-10
KCI LICENSING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The sequence of orifice connections can be ingenious, but as the required sequence becomes more complex, the use of large diameter valves requiring high torque motors, which are expensive and difficult to manufacture
Additionally, the more complex hole designs have limited spacing between holes, leading to inaccuracies and air leaks

Method used

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Examples

Experimental program
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Embodiment Construction

[0018] Referring to the accompanying drawings, the rotary valve is mounted on a plate as shown in FIG. 1 , and a motor 13 is positioned above the plate, wherein a drive pulley 14 is directly fixed on a drive spindle 15 of the motor. The toothed belt 16 is driven by the drive pulley 14 and meshes with the toothed profile of the periphery 20 of the first rotor 11 to rotate the rotors 11 and 12 relative to the stator 10 . The rotors 11, 12 can be driven in any direction by the electric motor. Preferably, the tooth profile of the rotor 11 around the periphery is an integral part of the rotor 11 . A properly tensioned belt drive 16 connects the two pulley profiles, and the reduction is achieved by the relative number of teeth on each pulley profile.

[0019] Instead of a belt drive 16 a straight tooth profile may be provided on the periphery of the rotor 11 to mesh with a cooperating drive pinion mounted on the drive spindle of the electric motor 13 .

[0020] Figure 2 shows the ...

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Abstract

A rotary valve for controlling air supply in an inflatable device comprises a first rotor (11) and the second rotor (12) driven by motor (13) with a drive pulley (14) fixed directly onto its drive spindle (15). A toothed belt (16) driven by the drive pulley (14) engages with the toothed perimeter profile of the first rotor (11), to rotate rotors (11) and (12) relative to a stator (10). As the first and / or second rotor(s) are rotated, channels and ports on the airtight interfaces between the rotors (11, 12) and the stator (10) are connected and disconnected as required by the desired inflation sequence, including all the ports sealed in one position or all the ports exhausting to atmosphere in another position. The valve can be used in conjunction with any type of inflating device, where complex porting or air routing is required, the valve achieving this in a simpler manner.

Description

technical field [0001] The present invention relates to rotary valves, and in particular, to rotary valves for controlling the supply of air in inflatable devices. Background technique [0002] It is known to use rotary valves to control the air supply from medical air pumps to provide compressed air in a specific sequence to inflatable devices such as air mattresses or compression garments. [0003] In most rotary valves, the supply of compressed air in a particular sequence is determined by the bores and passages of the two parts—the rotor and the stator—that are configured to rotate relative to each other. The rotor and stator are discs of suitable solid material held together by spring force, where flat mating surfaces form a hermetic seal. [0004] As the rotor rotates relative to the stationary stator, the different holes in the mating faces of the two parts connect together and thus change the routing of compressed air through the valve. The openings are designed an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K11/074F16K11/20F16K31/04
CPCF16K11/074F16K11/20F16K31/043Y10T137/87217Y10T137/86638Y10T137/87241
Inventor 内森·韦伯斯特戴维·马克·汉普森
Owner KCI LICENSING INC