Waterproof mechanism for emulsion dispensing pump

• US 6,357,629 B1
• Filed: 07/18/2000
• Issued: 03/19/2002
• Est. Priority Date: 12/25/1997
• Status: Expired due to Term

• Current Assignee: Yaowu Ding
• Original Assignee: Yaowu Ding
• Inventors: Ding, Yaowu
• Primary Examiner(s): JACYNA, J CASIMER
• Application Number:
  US09/582,319
• Time in Patent Office: 609 Days
• Field of Search: 222/153.13, 222/153.14, 222/321.1, 222/321.3, 222/321.7, 222/321.8, 222/321.9, 222/383.3, 222/384, 222/385
• US Class Current: 222/153.13
• CPC Class Codes: B05B 11/1047 the pump being preassembled as an independent unit before being mounted on the container
• CPC Class Codes: B05B 11/106 in a retracted position, e.g. in an end-of-dispensing-stroke position

Abstract

An emulsion pump mechanism for preventing external dirty water from entering the emulsion bottle is described. The pump mechanism includes a pressing head having an internal passage. At the lower end of the passage there is a pipe connector on the outer wall of which is an external thread. Additionally, the pump includes a connecting pipe communicated with the internal passage of the pressing head. The pump mechanism also includes a cylinder cover. The cylinder cover includes a dirty water preventing guiding sleeve pipe integrally formed in a lower portion of the central through-hole for preventing dirty water from entering the emulsion bottle. The guiding sleeve pipe is in easy slide fit with the outer wall of the connecting pipe and has an upper end extending higher than an upper surface of the cylinder cover.

Claims

1. An emulsion pump mechanism for preventing dirty water from entering an emulsion bottle comprising:

a pressing head comprising an internal passage, wherein at a lower end of the passage there is a pipe connector on the outer wall of which is provided an external thread;

a connecting pipe, wherein an upper end of the connecting pipe is fixed on the piper connector at the lower end of the pressing head and wherein the connecting pipe is communicated with the internal passage of the pressing head; and

a cylinder cover comprising a through-hole for the insertion of the connecting pipe, wherein in an upper portion of the through-hole there is an internal thread capable of being engaged with the outer thread on the outer wall of the pipe connector, and

wherein a dirty water preventing guiding sleeve pipe is integrally formed in a lower portion of the central through-hole in one piece construction with said cylinder cover for preventing dirty water from entering the emulsion bottle, the guiding sleeve pipe being in easy slide fit with the outer wall of the connecting pipe and having an upper end of the guiding sleeve pipe higher than an upper surface of the cylinder cover.

2. The emulsion pump mechanism according to claim 1, wherein the upper end of the connecting pipe has a reduced outer diameter, and the pipe connector on the lower end of the pressing head comprises

an inner pipe secured to the upper end of the connecting pipe, wherein the outer diameter of the inner pipe is equal to the outer diameter of a remaining portion of the connecting pipe, and

an outer pipe comprising an outer thread provided on an outer wall,

wherein, the pump further comprises a hollow annular space between the inner pipe and the outer pipe for receiving the dirty water preventing guiding sleeve pipe.