| 摘要 |
<p>57 A portable vacuum pump for desoldering purposes comprising a spring guide (10), a single spring (12) extending longitudinally within said spring guide, said spring guide being open along its entire length and having an outwardly turned portion on opposite edges, a loading knob having inwardly turned edges to ride along said outwardly turned portions of said spring guide, a plunger shaft disposed within said spring and including said loading knob secured thereto, a trigger housing (10) having means including a trigger for passing said plunger therethrough and for automatically moving said trigger sideways for loading it, a barrel (25) having means for screwing it to said trigger housing, said plunger shaft having a piston (21) movable within said barrel, and a tip assembly having means for removably securing it to one end of said barrel.</p> |
