Abstract: A pressure relief valve assembly for a steam cleaning device, includes a tubular member adapted to be communicated with a venting port of the device. An axially extending plunger member has a stem segment disposed movably in and spaced apart from the tubular member by a surrounding clearance which is communicated with the venting port via a surrounding seat portion, and a valve segment movable to abut against or to withdraw from the seat portion so as to interrupt or permit communication between the clearance and the seat portion. A radially extending steam releasing port is communicated with the clearance for discharging of excess steam through the clearance when the stem segment is in an actuated position.

Abstract: A steam cleaning device includes a conduit with a passageway to be aligned and in fluid communication with a duct of a steam generating member secured in a housing. A steam delivering head is removably inserted into and is aligned with the passageway of the conduit such that a channel thereof is in fluid communication with the passageway and such that steam generated by the steam generating member is released out through the passageway and a channel of the steam delivering head. Thus, when the steam delivering head is removed from the passageway, water scales attached to the duct and the channel can be removed by cleaning the same.