| 摘要 |
A pistol for feeding of polyurethane foam consists of a housing (1) which is prolonged by an effusion pipe (2) at the front end and fitted with a handle (3) at the rear end. The said housing (1) comprises, in addition to a pivotable trigger (13), a reception assembly (10) to attach a can containing components for the preparation of the polyurethane foam, which is connected, via a passage (11), with a chamber (12) inside of the housing (1), to which the said pipe (2), terminated by a nozzle (21), is attached. Into the latter, a tip (141) is optionally inserted of a needle (14) which leads through the said pipe (2), the chamber (12) and a gasket (16) within the housing (1) to a controlling screw (17), which is screwed with its threaded stem (171) into a threaded housing's (1) hole (18) which lies coaxially with the said needle (14). The said needle (14) is further fitted with a widening (142) whose towards-the- pipe (2) turned end represents a striker face (140) of the trigger (13), and whose opposite end is supported by a compression spring (16) which is abutted to the controlling screw (17). On the controlling screw (17), a radial recess (172) is provided, into the range of which a radial safety catch (19) protrudes to prevent any unintentional unscrewing of the screw (17) out of the hole (18). |
