Foam dispenser

• US 4,350,298 A
• Filed: 08/13/1980
• Issued: 09/21/1982
• Est. Priority Date: 08/16/1979
• Status: Expired due to Term

• Current Assignee: Canyon Corporation
• Original Assignee: Canyon Corporation
• Inventors: Tada, Tetsuya
• Primary Examiner(s): Reeves, Robert B.
• Assistant Examiner(s): Sobel, Paul A.
• Application Number:
  US06/177,933
• Time in Patent Office: 769 Days
• Field of Search: 239/333, 239/343, 239/354, 239/370, 239/428.5, 239/503, 239/504, 239/583, 239/541, 239/600, 239/500, 169/14, 222/524, 222/525, 222/520, 222/521, 222/380
• US Class Current: 239/333
• CPC Class Codes: B05B 11/0032 Manually actuated means located downstream the discharge nozzle for closing or covering it, e.g. shutters automatically removed during actuation of a spray pump B05B11/1053
• CPC Class Codes: B05B 11/0044 compensating underpressure by ingress of atmospheric air into the container, i.e. with venting means venting means for deformable containers B05B11/047
• CPC Class Codes: B05B 11/1011 without substantial movement of the nozzle in the direction of the pressure stroke
• CPC Class Codes: B05B 11/1074 located outside pump chambers
• CPC Class Codes: B05B 7/005 wherein ambient air is aspirated by a liquid flow
• CPC Class Codes: B05B 7/0056 with disturbing means promoting mixing, e.g. balls, crowns

Abstract

A foam dispenser comprises a nozzle cap which in turn includes a bottom with which collides the spray liquid discharged from an orifice formed in a foam dispenser body. At the bottom of this nozzle cap is a plurality of arms constituting an obstacle wall with which the spray liquid from the orifice collides, and a plurality of foam outlet ports defined by adjacent arms. Therefore, scattered spray streams and freely flowing liquid streams are alternately formed adjacent to one another. Locking devices are provided to lock the nozzle cap onto the foam dispenser body to prevent it from falling off.

Claims

1. In a foam dispenser for foaming a liquid mixed with air supplied from an air supplying means after the liquid is discharged from an orifice formed in a foam dispenser body and is scattered at the bottom of a nozzle cap located in front of the orifice, the improvement wherein said nozzle cap includes:

a plurality of arms at the bottom of said nozzle cap which form an obstacle wall with which the spray liquid from said orifice collides,

a plurality of foam outlet ports defined between adjacent ones of said arms so that scattered spray and freely flowing liquid streams are alternately formed adjacent to one another;

a sealing member which extends from the bottom of said nozzle cap for selectively sealing off said orifice in said foam dispenser body;

said nozzle cap being movable relative to said foam dispenser body between a sealing position whereat said sealing member seals off said orifice and a foaming position whereat said orifice is not sealed so that the spray stream from said orifice may be foamed;

at least one pair of through holes formed in said nozzle cap;

and wherein said foam dispenser body includes a pair of cantilever support arms extending from said foam dispenser body and having locking means at the free end of at least one of said support arms; and

said nozzle cap being slidably mounted to said pair of cantiliver support arms which respectively extend through said pair of through holes in said nozzle cap, said locking means being engageable with said nozzle cap for preventing said nozzle cap from falling off from said support arms.

2. The foam dispenser of claim 1 wherein said sealing member of said nozzle cap extends from the central portion of the bottom of said nozzle cap.

3. The foam dispenser of claim 1, wherein the nozzle cap is slidably movably mounted to said foam dispenser body for sliding movement between said sealing position and said foaming position;

and said foam dispenser further includes locking means for locking said nozzle cap at said sealing position thereof and at said foaming position thereof.

4. The foam dispenser of claim 3, wherein said locking means includes a pair of locking grooves and at least one locking projection engageable therewith.

5. The foam dispenser of claim 4, wherein said foam dispenser body includes a front cylinder having said orifice therein;

said locking grooves of said locking means are formed on the outer circumference of said front cylinder;

said nozzle cap has a projecting member inside thereof projecting toward said front cylinder; and

said at least one locking projection of said locking means is formed on the outer free end of the inner facing surface of said projecting member of said nozzle cap.

6. The foam dispenser of claim 5, wherein said nozzle cap includes a cylindrical projecting member which projects toward said front cylinder, the outer or free end of said cylinder comprising said projecting member on which said at least one locking projection of said locking means is formed, said at least one locking projection being formed on the inner facing surface of said cylinder, said cylinder surrounding said front cylinder of said foam dispenser body.

7. The foam dispenser of any one of claims 4, 5 or 6, wherein said at least one locking projection fits in the corresponding locking grooves at the starting point and the terminating point of the sliding stroke of said nozzle cap.