(under subclass 508) Apparatus of a motor comprising a working member and a working chamber having a first fluid therein and means to introduce a second fluid into said first fluid to produce a change in pressure of said first fluid whereby the change in pressure actuates the working member.
(1) Note. Usually water is injected into the working chamber to condense steam therein and the resultant reduced pressure actuates the working member due to a higher pressure on the opposite side of the working member, usually
atmospheric pressure.
(2) Note. A fluid such as hot water or hot air may be introduced into the working chamber to superheat the motive fluid therein and the change in pressure actuates the working member.
