Pressure-powered aerosol timer

Claim 1

A pressure-powered aerosol timer for an aerosol can comprising in combination: A. a main body including means for mounting the same on the top of the aerosol can, B. an operable control valve in the body, C. means for connecting fluid pressure from the aerosol can to the control valve, D. a nozzle on the body, E. means for actuating the control valve so as to automatically intermittently connect or shut off fluid pressure from the can to the nozzle including, F. an actuating device operated by fluid pressure from the can and connected to operate the control valve, G. means in the control valve effective when operated to one position to connect fluid from the can to the nozzle, H. and further means in connection with the control valve to yieldingly normally move the control valve to a position to connect fluid pressure from the can to the actuating device, I. an actuating cylinder on the main body, J. a first bellows mounted on the main body within the pressure chamber of the actuating cylinder, K. a second bellows mounted on the main body in open atmosphere, L. a passageway in the main body in communication with the interiors of both bellows, M. a fluid, independent of the aerosol can fluid, confined within the interiors of the bellows and the connecting passageway, N. a timer-actuating passageway in the main body communicating between the pressure chamber of the actuating cylinder and the control valve, O. yielding means between the main and the second bellows to normally cause compression of the second bellows and expansion of the first bellows, and P. means operatively connected between the second bellows and the control valve for actuating the control valve.