Suction producing disposable pump and dispenser

• US 4,189,245 A
• Filed: 04/28/1978
• Issued: 02/19/1980
• Est. Priority Date: 04/28/1978
• Status: Expired due to Term

• Current Assignee: Robert A. Bennett
• Original Assignee: Robert A. Bennett
• Inventors: Bennett, Robert A.
• Primary Examiner(s): Burr, Edgar S.
• Assistant Examiner(s): Bratlie, Steven A.
• Application Number:
  US05/900,990
• Time in Patent Office: 662 Days
• Field of Search: 401/118, 401/126-130, 401/122, 401/187-189, 132/88.7, 222/385
• US Class Current: 401/126
• CPC Class Codes: A45D 2200/056 Reciprocating pumps, i.e. with variable volume chamber wherein pressure and vacuum are alternately generated
• CPC Class Codes: A45D 34/045 connected to the cap of the container
• CPC Class Codes: A45D 34/046 comprising a wiper
• CPC Class Codes: A46B 11/001 with integral reservoirs A46B11/0003, A46B11/0006 take precedence

Abstract

A hollow casing having a vertical bore is inserted into the open neck of a container having liquid therein in such manner as to evacuate all air in the container other than the air in the neck. A piston having a brush at one end is moved into and out of the bore to charge the brush with a selected amount of liquid and to cause a lower portion of the bore to fill with liquid by suction action. A cap secured to the top of the piston and detachably engagable with the neck enables a user to manipulate the piston as desired.

Claims

1. A suction producing disposable pump and dispenser in combination with a container having an open neck with liquid to be dispensed therein, the liquid filling essentially the entire container with the exception of said neck and comprising:

a vertically elongated hollow member having a top end with a circular opening therein having a first diameter and with an outwardly extending circular peripheral lip, said member having a bottom end with a circular opening therein having a second and smaller diameter, said ends being interconnected by a vertical bore having integral upper, middle and lower sections, said lower section defining a first cylinder having a diameter equal to said second diameter, said middle section defining a second cylinder having a third diameter which is intermediate the first and second diameters in size, said upper section defining an inverted truncated core with an upper end having a diameter equal to said first diameter and with a lower end having a diameter equal to said third diameter, the member having an outer surface with a vertical groove extending upward to a point just below said lip, said member being disposed in the container with the lip resting upon the top of the open neck and the outer surface of the member which is within the neck engaging the inner surface of the neck in airtight manner, the bottom of the member being only slightly above the bottom of the container, the groove extending upward along the entire length of the neck whereby insertion of said member in said container causes any air in the container below the neck to be expelled via said groove;

a vertically elongated cylindrical piston having a bottom enlarged end defining a third cylinder having a diameter larger than said second diameter, said piston extending downwardly into the bore and manually movable up and down therein between a raised position at which the piston is completely removed from the member and a lowered position at which said enlarged end engages the lower end of said second cylinder, the piston movement causing the first cylinder to be filled with fluid by suction;

a plurality of elongated parallel bristles secured at their upper ends to said enlarged end of the piston and extend downward, said bristles, when the piston is in the lowered position, extending downwardly into said first cylinder to reach the opening in the bottom end of said member, the bristles being charged with fluid when disposed in the first cylinder whereby when the piston is removed, the bristles can be used to transfer fluid charged thereon to a suitable surface; and

a cap detachably securable to the outer surface of the neck of the container and secured to the top end of the piston, said cap when detached from the neck being manually operated to enable the piston and bristles to be removed from and replaced into the member.