Air extractor pump for waterbeds

Abstract

The invention relates to an air extractor pump for waterbeds comprising a piston (1) held with longitudinal slideability in a cylinder (4), wherein the piston (1) and the cylinder (4) each are equipped at their back ends as seen in insertion direction (3′) with a valve flap (9, 17) closeably covering a through-bore (33) each, wherein the front end of the piston (1) as seen in insertion direction (3′) is equipped with a discharge bore (5), and wherein at the back end of the cylinder (4) as seen in insertion direction (3′), a thread (32) is provided wherewith it can be screwed onto a correlated screw neck (12) of a filler neck (10) of a waterbed, wherein the valve flaps (9, 17) are attached in the area of separately constructed valve cases (15, 16), wherein the piston-side valve case (16), as well as the cylinder-side valve case (15) are each equipped with a plug-in piece (19, 24) engaging with the plug-in receptacles (29, 30) of the piston (1) or the cylinder (4), respectively, in a correlated, sealed snap-in connection. The object is to create an air extractor pump functioning with operational reliability, which can be assembled free from adhesive and manufactured at lower cost and with greater functional reliability.

Dependencies are inferred from the claim text.