| 摘要 |
<p>An assembly for pressurization and dispensing of fluid substances for a manually operated pump, said assembly comprising: a unitary assembly (15) that can be coupled to said cup -shaped body (3) of said pump, composed of a stem (5), spring (7), piston (6), and retention element (11), wherein the stem (5) comprises at least one first (12, 112, 212) and a second element (13, 113, 213) and means (14) for fastening said two elements together in a fluid- tight way, the first and second elements (12, 13) of the stem being constituted by hollow tubular bodies, said elements (12, 13) being partially inserted into one another, and said fastening means having members (14) designed to fasten said tubular elements together in a fluid- tight way, said first retention element being constituted only by an annular collar (5F) projecting from the stem (5); said collar forms a single piece with the first element (12) of said stem to guarantee at all times a firm connection of said spring to said stem; and said first end (7A) of the spring bears directly upon said collar.</p> |
