|Publication number||USRE38692 E1|
|Application number||US 10/390,637|
|Publication date||Feb 1, 2005|
|Filing date||Mar 19, 2003|
|Priority date||Oct 16, 2000|
|Also published as||CN1189148C, CN1348754A, EP1199014A2, EP1199014A3, US6325236|
|Publication number||10390637, 390637, US RE38692 E1, US RE38692E1, US-E1-RE38692, USRE38692 E1, USRE38692E1|
|Inventors||Chung Lun Wong|
|Original Assignee||Fu Hong Industries Ltd.|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (11), Referenced by (21), Classifications (8), Legal Events (4)|
|External Links: USPTO, USPTO Assignment, Espacenet|
The present invention relates to a drinking device, and particularly, but not exclusively, to a trainer cup for infants, which is leak-proof.
Leak-proof drinking devices are, of course, generally known, particularly for infants, which usually have a body and a lid closing the body. In one of the known constructions, for example as disclosed in UK Patent No. 2266045, the lid has an outlet for dispensing liquid and an air inlet for pressure balance, both of which are provided with respective one-way valves to protect against leakage.
Liquid is to be extracted from inside the body through suction applied to the outlet. While the valve of the outlet should be closed reasonably tightly normally, it has to be opened relatively easily to facilitate drinking. None of the known devices is found to be satisfactory in this regard.
The invention seeks to mitigate or at least alleviate such a problem by providing an improved drinking device.
According to the invention, there is provided a drinking device comprising a body having an open upper end and for containing a liquid, a lid for sealingly closing the upper end of the body, the lid having an outlet incorporating a first one-way valve for dispensing the liquid from the body upon the application of suction at the outlet, and an inlet incorporating a second one-way valve for air intake to automatically balance the internal pressure of the closed body with the external pressure while the liquid is being dispensed, wherein the first valve comprises a chamber having a resiliently deformable wall including a hole in communication with the outlet, which hole is normally closed by being pressed against an internal surface of the drinking device by virtue of the resilience of the wall and is openable upon the application of said suction.
It is preferred that the inlet is provided at the lid.
Preferably, the upper end of the body has a rim for engagement with the lid, and the internal surface against which the hole of the chamber wall is normally pressed is provided by an inner surface of the body at a position slightly below the rim.
More preferably, the lid is arranged to engage externally around the rim of the body for closing the body upper end.
In a slightly different construction, the lid includes a depending wall providing the internal surface against which the hole of the chamber wall is normally pressed.
It is preferred that the hole of the chamber wall has a tubular rim protruding outwards for engaging the internal surface of the drinking device.
In a preferred embodiment, the chamber is provided by a resiliently deformable sleeve, and the lid includes a member which extends downwards from the outlet and around which the sleeve is disposed for support to form the chamber, the member incorporating a co-extending internal duct connecting the outlet to the interior of the chamber.
More preferably, the member has an upper end along which the duct extends and a lower end supporting the sleeve and forming a void directly behind the hole of the chamber wall to provide excessive room for that part of the chamber wall to bend inwards for opening the hole.
Further more preferably, the sleeve has a rectangular box-like body having an open upper side which is stretched from below over the lower end of the member to form the chamber.
It is preferred that the lid has a centre hole acting as the inlet, and the second valve is of a slit valve located at the centre hole.
Advantageously, the first and second valves are connected integrally to opposite ends of a flexible member, thereby together forming a one-piece seal.
The aforesaid drinking device may be a trainer cup for infants, wherein the lid includes an upstanding spout having an apex providing the outlet.
The invention will now be more particularly described, by way of example only, with reference to the accompanying drawings, in which:
Referring initially to
The spout 220 has an apex 222 with an outlet hole 224 and includes an internal integral member or bar 230 extending, downwards from the apex 222, at a position close to the lid rim 212. The bar 230 has an upper end (half) 232 which has a hollow rectangular cross-section and includes a co-extending partition 234. The partition 234 has a part-circular cross-section and defines a duct 236 extending downwards from the outlet 224 above and on the outer side of the bar 230 facing the lid rim 212. The partition 234 continues onto a lower end (half) 238 of the bar 230, where it is exposed to form an empty space or void 239 on the outer side of the bar 230.
The lid 200 incorporates a resiliently deformable seal 300 made of silicone rubber. The seal 300 includes a one-way slit valve 310 and another one-way valve including a sleeve 320, which are connected integrally to opposite ends of a tape 330, thereby together forming a one-piece structure.
The slit valve 310 has a grommet-like body 312 press-fitted from below through the inlet 214 of the lid 200 and includes a hemispherical valve member 314 at the lower end of the body 312. The valve member 314 includes a split 316 that is normally-closed (FIG. 8). The valve member 314 protrudes from the underside of the lid 200 such that the slit 316 will open (
The sleeve 320 has a rectangular box-like sleeve body 322 having an open upper side 324, which is stretched from below over the lower end 238 of the bar 230 of the lid 200. The upper rim of the sleeve body 322 reaches over the lowermost end of the upper end 232 of the bar 230, thereby forming a chamber 323 enclosing the lower bar end 238.
Outer wall 326 of the sleeve body 322 or chamber 323 includes a hole 328 which has a tubular rim 329 protruding outwards. The hole 328 is positioned directly in front of the void 239 in the bar 230 such that there is excessive room, as provided by the void 239, for the part of the chamber wall 326 including the rim 329 to bend inwards.
The spout outlet 224 is in communication with the sleeve hole 328 via the duct 236 and the void 239, whereby a through path X is formed. The bar 230 is arranged such that when the lid 200 is in place, the rim 329 of the sleeve hole 328 is pressed against the inner surface of the cup body 100 at a position slightly below the rim 112, whereby the hole 328 is normally closed and hence the path X blocked (FIG. 8).
When the trainer cup 10 containing water (for example) is in use at an inverted position, the infant sucks at the spout 220 and thus creates a suction or pressure drop within the chamber 323. The pressure drop causes the wall 326 of the sleeve body 322 to bend inwards, thereby moving the rim 329 away from the aforesaid inner surface of the cup body 100 and thus resulting in opening or unblocking of the hole 328 (FIG. 9). Water can simultaneously flow out along the path X and be dispensed at the spout 220 for as long as the infant is sucking, via the sleeve 320 acting as a one-way valve.
The loss of water creates a pressure drop within the cup 10, which is compensated in terms of volume by air drawn in through the slit valve 310, which automatically opens for air intake to balance the internal pressure of the cup 10 with the external pressure, as required, for water dispensing. When the infant stops drinking, the hole 328 is instantly re-closed by virtue of the resilience of the chamber wall 326.
By reason of the construction of the one-way dispensing valve with the sleeve 320, the subject drinking device 10 enables users to drink easily, while preventing liquid leakage when not in use.
Reference is now made to
In general, it is envisaged that the air inlet (with slit valve) may be provided on the cup body instead of the lid, for example on the shoulder of the cup body in the case where the cup body has an open end of a reduced size.
The invention has been given by way of example only, and various other modifications of and/or alterations to the described embodiments may be made by persons skilled in the art without departing from the scope of the invention as specified in the appended claims.
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|US20130037510 *||May 25, 2012||Feb 14, 2013||Desarrollos Tamarit Plaza Sl||Cap|
|U.S. Classification||220/713, 220/717, 220/714, 215/11.5|
|International Classification||B65D47/06, B65D39/08|
|May 27, 2005||FPAY||Fee payment|
Year of fee payment: 4
|May 6, 2009||FPAY||Fee payment|
Year of fee payment: 8
|Jul 12, 2013||REMI||Maintenance fee reminder mailed|
|Dec 4, 2013||LAPS||Lapse for failure to pay maintenance fees|