초록 ▼

A precompression pump for spraying a liquid comprises a pumping chamber (502) containing a first piston (507) associated with an operating member (506), this piston bearing against a first spring (509); a precompression chamber (505) equipped with a second piston (510) bearing against a second sprin

A precompression pump for spraying a liquid comprises a pumping chamber (502) containing a first piston (507) associated with an operating member (506), this piston bearing against a first spring (509); a precompression chamber (505) equipped with a second piston (510) bearing against a second spring (511), the precompression chamber communicating with the pumping chamber via a passage (550), so that their axes of symmetry being offset. A feed channel (504) equipped with a valve (504a, 515) emerges in the pumping chamber. A dispensing element (517) is equipped with a nozzle (520) and with a dispensing channel (518) connecting the nozzle to the precompression chamber, the latter including a device (F) for placing in communication and for closing the said passage (550), so that communication is interrupted in the position of rest of the pump and so that communication is established under the action of the operating member.

대표청구항 ▼

[ We claim:] [1.] A precompression pump (501, 601) for spraying a liquid under constant pressure, comprising:a cylindrical body (503, 603) defining a cylindrical pumping chamber (502, 602) having a longitudinal axis (X) and in which is housed a first piston (507, 607) associated with an operating me

[ We claim:] [1.] A precompression pump (501, 601) for spraying a liquid under constant pressure, comprising:a cylindrical body (503, 603) defining a cylindrical pumping chamber (502, 602) having a longitudinal axis (X) and in which is housed a first piston (507, 607) associated with an operating member (506, 606), said first piston bearing against a first elastic return means (509, 609);a cylindrical precompression chamber (505, 605) having a longitudinal axis (Y) and being equipped with a second piston (510, 610) bearing against a second elastic return means (511, 611), the precompression chamber being in fluid communication with the pumping chamber (502, 602) via a passage (550, 650);a feed channel (504, 604) equipped with a non-return valve (515, 504a; 615, 604a) emerging in the pumping chamber (502, 602); anda dispensing element (517, 617) equipped with a spray nozzle (520, 620) and with a dispensing channel (518, 618) connecting the nozzle to the precompression chamber, said second piston (510, 610) comprising a sliding means (F) for opening and for closing said passage (550, 650) so that fluid communication between said precompression chamber and said pumping chamber is interrupted in the position of rest of the pump and so that this fluid communication is established upon precompression under the action of the operating member; the improvement wherein the longitudinal axis (Y) of the precompression chamber (505, 605) is parallel but spaced from the longitudinal axis (X) of the pumping chamber (502, 602), the precompression chamber (505, 605) being situated in an extension of the pumping chamber (502, 602); and the liquid contained in the pumping chamber (502, 602) gaining direct access to the precompression chamber (505, 605) upon actuation of the operating means (506, 606).