Title:
FOAM PUMP
Document Type and Number:
WIPO Patent Application WO/2022/041640
Kind Code:
A1
Abstract:
A foam pump. An air cylinder (31), a liquid compression cylinder (32), and a liquid feeding valve seat (33) are integrally provided in a pump body (3); an elastic pressing assembly (5) comprises a piston rod assembly (51) provided with a liquid channel (52), a piston assembly (53), and a fully plastic closed spring (54); the piston assembly (53) comprises an air compression piston assembly (55) provided with an air inlet and feed structure, and a liquid compression piston (56); the upper end of the piston rod assembly (51) is movably connected to the air compression piston assembly (55) for opening/closing; an air-liquid mixing channel (7) is formed between the upper end of the piston rod assembly (51) and the air compression piston assembly (55); the lower end of the piston rod assembly (51) is movably connected to the liquid compression piston (56) for opening/closing; the fully plastic closed spring (54) is sleeved on the piston rod assembly (51), and is pressed inside the air cylinder (31) by means of the piston rod assembly (51); the fully plastic closed spring (54) forms several spring air compression structures (543) during a compression process; the fully plastic closed spring (54) and the air compression piston assembly (55) form a double-air compression structure; the air compression piston assembly (55), the piston rod assembly (51), the fully plastic closed spring (54), and the liquid compression piston (56) are combined to form an integrated linkage air compression, liquid compression, and reset mechanism.
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Inventors:
WANG JINFENG (CN)
Application Number:
PCT/CN2021/072583
Publication Date:
March 03, 2022
Filing Date:
January 19, 2021
Export Citation:
Assignee:
NINGBO SENG CZE MACROSPRAY CO LTD (CN)
International Classes:
B65D47/34; B05B11/00
Foreign References:
| CN112173408A | 2021-01-05 | |||
| CN212739100U | 2021-03-19 | |||
| CN111038842A | 2020-04-21 | |||
| JPH10101115A | 1998-04-21 | |||
| CN104853995A | 2015-08-19 | |||
| CN111186631A | 2020-05-22 | |||
| JPH1094744A | 1998-04-14 |
Attorney, Agent or Firm:
HANGZHOU HANGCHENG PATENT ATTORNEY OFFICE CO., LTD. (CN)
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