Title:
FOAM PUMP
Document Type and Number:
WIPO Patent Application WO/2022/041635
Kind Code:
A1
Abstract:
A foam pump, comprising a pressing pump head (1), a screw cap (2), a pump body (3), a foaming assembly (4), a piston assembly (5), and a valve (6). An outer cylinder (104) and an inner cylinder (105) are provided on the pressing pump head (1). An upper cavity (200) is integrally formed on the screw cap (2) in an extending manner. The inner cylinder (105) is inserted into the upper cavity (200). An air inlet cavity (13) communicating with external gas is formed between the outer cylinder (104) and the upper cavity (200). An all-plastic closed spring (54) is pressed between the inner cylinder (105) and the upper cavity (200). An air inlet hole (14) is formed in the upper end of the all-plastic closed spring. An air inlet channel (15) is formed between the all-plastic closed spring and the outer wall of the inner cylinder. In the foam pump, the external gas is introduced through the interior of the closed spring, the spring is of an all-plastic structure and the elastic force thereof is variable, and the foam spraying amount can be adjusted according to the strength of a user during a pressing process, so that the comfort of pressing is improved, the foaming effect is good, and the foam lasts for a long time.
Inventors:
WANG JINFENG (CN)
Application Number:
PCT/CN2021/071624
Publication Date:
March 03, 2022
Filing Date:
January 14, 2021
Export Citation:
Assignee:
NINGBO SENG CZE MACROSPRAY CO LTD (CN)
International Classes:
B05B11/00; B65D47/34; B65D83/76
Domestic Patent References:
| WO2009050978A1 | 2009-04-23 |
Foreign References:
| CN112173409A | 2021-01-05 | |||
| CN110040350A | 2019-07-23 | |||
| CN208790238U | 2019-04-26 | |||
| CN202346098U | 2012-07-25 | |||
| CN210102436U | 2020-02-21 | |||
| CN107614389A | 2018-01-19 | |||
| CN208181752U | 2018-12-04 | |||
| JP2007253112A | 2007-10-04 | |||
| JP2015098328A | 2015-05-28 |
Attorney, Agent or Firm:
HANGZHOU HANGCHENG PATENT ATTORNEY OFFICE CO., LTD. (CN)
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