Piston type aerosol unit

Claim 1

A PISTON TYPE AEROSOL UNIT COMPRISING AN OUTER CONTAINER HAVING A CLOSED END AND AN OPEN END, AN INNER SMALLER CONTAINER HAVING BOTH ENDS OPEN AND LOCATED WITHIN THE OUTER CONTAINER WITH AN END OF THE INNER CONTAINER GENERALLY ALIGNED WITH THE OPEN END OF THE OUTER CONTAINER, A MOVABLE PISTON IN THE INNER CONTAINER WHEREBY PRESSURE IN THE OUTER CONTAINER WILL PROVIDE PRESSURE ON THE PISTON IN TURN PROVIDING PRESSURE ON THE CONTENTS OF THE INNER CONTAINER, A VALVE FOR THE INNER CONTAINER AT ITS END OPPOSITE THE PISTON, SAID VALVE INCLUDING A RESILIENT GASKET, AN ACTUATOR FOR SAID VALVE TO OPEN THE SAME TO PROVIDE EXPRESSION OF THE CONTENTS OF THE INNER CONTAINER TO THE ATMOSPHERE, MEANS CLOSING THE OPEN END OF THE OUTER CONTAINER, THE LAST-NAMED MEANS HOLDING THE INNER CONTAINER WITHIN THE OUTER CONTAINER AND INCLUDING AN INWARDLY DIRECTED GUIDE ENGAGING THE GASKET AND STRETCHING THE SAME TO A LIMITED EXTENT, SAID ACTUATOR INCLUDING A STEM FOR SLIDING RECEPTION IN THE GUIDE AND IMPINGING THEREON TO STRETCH THE GASKET TO OPEN POSITION THEREOF.