Patents by Inventor Clive Sleath

Clive Sleath has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Powder inhaler with breath flow regulation valve
    Patent number: 6109261
    Abstract: There is provided a device for the administration of an inhalation medicament, including a body defining a through-going air pathway having a longitudinal axis, an air inlet, an air outlet forming a mouthpiece, means for dispensing medicament into the pathway and air flow regulating means, characterized in that the air flow regulating means includes a movable obstructing means adapted to reduce the cross-sectional area of the pathway at a location between the air inlet and the means for dispensing medicament, and biassing means, whereby the obstructing means is biassed into a first resting position in which the cross-sectional area of the pathway is minimum and is adapted to move against the bias of the biassing means to a second position in which the cross-section area of the pathway is maximum in response to a pressure fall at the mouthpiece caused by inhalation and is adapted to move farther to a third position in which the cross-sectional area of the pathway is less than maximum in response to a greater p
    Type: Grant
    Filed: January 14, 1998
    Date of Patent: August 29, 2000
    Assignee: Fisons plc
    Inventors: Alastair Robert Clarke, Clive Sleath, Michael Trevor Shepherd
  • Powder inhaler with breath flow regulation valve
    Patent number: 5727546
    Abstract: There is provided a device for the administration of an inhalation medicament, including a body defining a through-going air pathway having a longitudinal axis, an air inlet, an air outlet forming a mouthpiece, means for dispensing medicament into the pathway and air flow regulating means, characterised in that the air flow regulating means includes a movable obstructing means adapted to reduce the cross-sectional area of the pathway at a location between the air inlet and the means for dispensing medicament, and biassing means, whereby the obstructing means is biassed into a first resting position in which the cross-sectional area of the pathway is minimum and is adapted to move against the bias of the biassing means to a second position in which the cross-section area of the pathway is maximum in response to a pressure fall at the moiuthpiece caused by inhalation and is adapted to move further to a third position in which the cross-sectional area of the pathway is less than maximum in response to a greater
    Type: Grant
    Filed: July 17, 1996
    Date of Patent: March 17, 1998
    Assignee: Fisons plc
    Inventors: Alastair Robert Clarke, Clive Sleath, Michael Trevor Shepherd