Patent ID: 7891385
Filing Date: 2011-02-22
Classification: B29C,B29L,F04B,Y10T

Abstract:
1. A sealing and pumping device for a tire, which injects a liquid sealing agent into a punctured pneumatic tire, and then supplies compressed air into the pneumatic tire to increase internal pressure thereof, the device comprising: a liquid chamber that receives the sealing agent, and is provided with a first discharge outlet for communicating with the inside of the pneumatic tire, the liquid chamber reducing its contained volume and discharging the sealing agent through the discharge outlet upon receiving predetermined compressive load in a compression direction from outside; an air chamber provided adjacent to the liquid chamber, a contained volume of the air chamber increasing as internal pressure is raised by compressed air fed therein from outside, and the air chamber decreasing the contained volume of the liquid chamber by applying a load to the liquid chamber in the compression direction via a boundary portion with the liquid chamber; a circumferential wall surface provided at an outer circumferential side of the boundary portion and forming a part of an inner wall surface of the air chamber; and a second discharge outlet which opens toward the circumferential wall surface, being separated from the air chamber by the boundary portion until a predetermined amount of sealing agent is discharged from the liquid chamber; and moving with respect to the boundary portion to a position where the air chamber to communicate with the inside of the pneumatic tire after the predetermined amount of sealing agent is discharged.