US2016338466A1PendingUtilityA1

Hand held appliance

44
Assignee: DYSON TECHNOLOGY LTDPriority: May 22, 2015Filed: May 19, 2016Published: Nov 24, 2016
Est. expiryMay 22, 2035(~8.8 yrs left)· nominal 20-yr term from priority
Inventors:Antoine Francois AtkinsonChristopher William Hedges
F24H 3/04A45D 20/122A45D 20/12A45D 20/10F24H 3/0423
44
PatentIndex Score
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Cited by
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References
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Claims

Abstract

A hand held appliance comprising an outer wall, an inner wall, a fluid flow path extending within the inner wall from a fluid inlet into the appliance to a fluid outlet, a fan unit disposed within the inner wall for drawing fluid in through the fluid inlet and a seal disposed between the outer wall and the inner wall. Fluid in the fluid flow path may flow from the fluid inlet to an upstream end of the fan unit, through the fan unit to a downstream end of the fan unit and on to a fluid outlet. The seal may be downstream of the fluid inlet. The seal may be downstream of the fan unit. The outer wall may comprise a handle of the appliance. The seal may comprise an o-ring, a lip seal or any over moulded seal.

Claims

exact text as granted — not AI-modified
1 . A hand held appliance comprising:
 an outer wall;   an inner wall;   a fluid flow path extending within the inner wall from a fluid inlet into the appliance to a fluid outlet; and   a fan unit disposed within the inner wall for drawing fluid in through the fluid inlet and a seal disposed between the outer wall and the inner wall.   
     
     
         2 . The appliance of  claim 1 , wherein fluid in the fluid flow path flows from the fluid inlet to an upstream end of the fan unit, through the fan unit to a downstream end of the fan unit and on to a fluid outlet. 
     
     
         3 . The appliance of  claim 1 , wherein the seal is downstream of the fluid inlet. 
     
     
         4 . The appliance of  claim 1 , wherein the seal is downstream of the fan unit. 
     
     
         5 . The appliance of  claim 1 , wherein the outer wall comprises a handle of the appliance. 
     
     
         6 . The appliance of  claim 5 , wherein the seal comprises an o-ring, a lip seal or any over moulded seal. 
     
     
         7 . The appliance of  claim 6 , wherein the seal extends around the radially outer circumference of the inner wall. 
     
     
         8 . The appliance of  claim 6 , wherein the seal extends around the radially inner circumference of the outer wall. 
     
     
         9 . The appliance of  claim 1 , wherein the inner wall comprises at least one noise mitigating perforation wherein the seal is located downstream of the at least one perforation. 
     
     
         10 . The appliance of  claim 1 , wherein a second seal is provided. 
     
     
         11 . The appliance of  claim 10 , wherein the second seal is provided downstream of the first seal. 
     
     
         12 . The appliance of  claim 10 , wherein the outer wall comprises a user interface comprising at least one user operable button. 
     
     
         13 . The appliance of  claim 12 , wherein the first seal is positioned upstream of the user interface and the second seal is positioned downstream of the user interface. 
     
     
         14 . The appliance of  claim 12 , wherein the user interface further comprises an actuator which cooperates with the user operable button wherein the actuator is mechanically connected to a switch. 
     
     
         15 . The appliance of  claim 14 , wherein the actuator forms part of a switch assembly which connects to the inner wall. 
     
     
         16 . The appliance of  claim 15 , wherein the seal extends around the switch assembly and the inner wall. 
     
     
         17 . The appliance of  claim 15 , wherein the second seal extends around the switch assembly and the inner wall. 
     
     
         18 . The appliance of  claim 15 , wherein the switch assembly comprises a flexible membrane which surrounds the actuator and comprises a protrusion that seals against the inner wall. 
     
     
         19 . The appliance of  claim 18 , wherein the protrusion extends along a longitudinal axis of the inner wall. 
     
     
         20 . The appliance of  claim 18 , wherein the protrusion extends on either side of the actuator along a longitudinal axis of the inner wall. 
     
     
         21 . The appliance of  claim 1 , wherein a further seal is provided. 
     
     
         22 . The appliance of  claim 21 , wherein the further seal is positioned downstream of the fluid inlet and spaced from the seal. 
     
     
         23 . The appliance of  claim 1 , wherein the appliance is a hair care appliance. 
     
     
         24 . The appliance of  claim 23 , wherein the hair care appliance is a hairdryer.

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