IT1254484B - Small hand pump for dispensers of liquid or creamy substances - Google Patents

Small hand pump for dispensers of liquid or creamy substances

Info

Publication number
IT1254484B
IT1254484B ITMI920454A ITMI920454A IT1254484B IT 1254484 B IT1254484 B IT 1254484B IT MI920454 A ITMI920454 A IT MI920454A IT MI920454 A ITMI920454 A IT MI920454A IT 1254484 B IT1254484 B IT 1254484B
Authority
IT
Italy
Prior art keywords
stem
piston
hollow body
dispensers
liquid
Prior art date
Application number
ITMI920454A
Other languages
Italian (it)
Inventor
Francesco Mascitelli
Donato Berardinucci
Original Assignee
Sar Spa
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sar Spa filed Critical Sar Spa
Priority to ITMI920454A priority Critical patent/IT1254484B/en
Publication of ITMI920454A0 publication Critical patent/ITMI920454A0/en
Publication of ITMI920454A1 publication Critical patent/ITMI920454A1/en
Application granted granted Critical
Publication of IT1254484B publication Critical patent/IT1254484B/en

Links

Abstract

The pump 10 for dispensers of liquid or creamy substances comprises a hollow body 12 of cylindrical shape, open at both ends, a non-return valve 14 that closes one of these ends, a hollow stem 20 projecting from the other end of the hollow body 12 through a circular hole 18 provided in a closing part 16. The stem 20 carries a dispensing button 32 fitted with a delivery nozzle 36 communicating with the inside of the stem 20. Inside the hollow body 12 is a sealed piston 38, coaxial with the stem 20, that can move in both directions that is able to move on the stem 20 between two predetermined positions. The piston 38 together with the valve 14, at the lower end of the stem 20 and the said wall 40 of the hollow body 12 form a pressure chamber 44 that is in communication with the delivery nozzle 36 when the piston 38 is in its rearmost position on the stem, while the communication is interrupted when the piston is in its foremost position. The pump also includes a primary spring 46 acting between the hollow body 12 and the piston 38 to bring the latter to its foremost position on the stem 20, and a secondary spring 48 to bring the stem 20 to its position of maximum projection from the hollow body 12. The secondary spring 48 also acts on the piston 38 in opposition to the primary spring 46. <IMAGE>
ITMI920454A 1992-02-28 1992-02-28 Small hand pump for dispensers of liquid or creamy substances IT1254484B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ITMI920454A IT1254484B (en) 1992-02-28 1992-02-28 Small hand pump for dispensers of liquid or creamy substances

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI920454A IT1254484B (en) 1992-02-28 1992-02-28 Small hand pump for dispensers of liquid or creamy substances

Publications (3)

Publication Number Publication Date
ITMI920454A0 ITMI920454A0 (en) 1992-02-28
ITMI920454A1 ITMI920454A1 (en) 1993-08-28
IT1254484B true IT1254484B (en) 1995-09-25

Family

ID=11362200

Family Applications (1)

Application Number Title Priority Date Filing Date
ITMI920454A IT1254484B (en) 1992-02-28 1992-02-28 Small hand pump for dispensers of liquid or creamy substances

Country Status (1)

Country Link
IT (1) IT1254484B (en)

Also Published As

Publication number Publication date
ITMI920454A0 (en) 1992-02-28
ITMI920454A1 (en) 1993-08-28

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Legal Events

Date Code Title Description
0001 Granted
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19950228