Pressure multiplying dispenser

• US 4,603,794 A
• Filed: 03/29/1985
• Issued: 08/05/1986
• Est. Priority Date: 03/29/1985
• Status: Expired due to Fees

• Current Assignee: Battelle Development Corporation Columbus Ohio
• Original Assignee: Battelle Development Corporation
• Inventors: DeFord, Henry S., Moss, Owen R.
• Primary Examiner(s): NOT, DEFINED
• Assistant Examiner(s): Smith, P. McCoy
• Application Number:
  US06/717,412
• Time in Patent Office: 494 Days
• Field of Search: 222/206, 222/207, 222/209, 222/211, 222/215, 222/249, 222/335, 222/336, 222/372, 222/373, 222/378, 222/382, 222/395, 222/409, 222/464, 222/212, 222/213, 417/392, 417/489, 417/490, 239/327, 239/368, 239/369
• US Class Current: 222/207
• CPC Class Codes: B05B 11/043 designed for spraying a liquid B05B11/046 takes precedence
• CPC Class Codes: B05B 11/1001 Piston pumps B05B11/1087, B05B11/1088, B05B11/109 take precedence
• CPC Class Codes: B05B 11/1015 actuated without substantial movement of the nozzle in the direction of the pressure stroke B05B11/1011 takes precedence
• CPC Class Codes: B05B 11/1052 Actuation means locking means therefor B05B11/1059; the dispensing stroke being affected by the stored energy of a spring B05B11/109
• CPC Class Codes: B05B 11/1087 Combination of liquid and air pumps
• CPC Class Codes: B05B 15/30 Dip tubes

Abstract

A pressure multiplying dispenser for delivering fluid, preferably as a spray to the atmosphere, from a source of fluid, preferably a spray bottle, is described. The dispenser includes in combination a hollow cylindrical member, a nozzle delivery tube within the cylindrical member and a hollow actuator piston slideable within the cylindrical member which acts to multiply the pressure of a squeeze applied to the spray bottle.

Claims

1. A dispensing apparatus for delivering fluid from a source of fluid when subjected to a positive pressure comprising:

(a) an actuator cylinder having inlet means for inletting fluid communicating with the source of fluid and an outlet end connectable to orfice means for delivering the fluid to the atmosphere,

(b) an actuator piston slideable onto a fixed position delivery tube and the actuator piston being slideable within the actuator cylinder from a first position near the inlet means to a second position toward the outlet end, the piston being hollow and having at least one fluid inlet orifice communicating with the actuator cylinder inlet means when the actuator piston is in the first position but not when the actuator piston is in the second position, and

(c) the fixed position delivery tube having an exit end for delivering the fluid from the actuator piston to the orifice means connected to the outlet end of the actuator cylinder and having an entrance means communicating with the actuator piston for delivering fluid from the actuator piston to the delivery tube such that the interior of the delivery tube is in communication with the fluid in the actuator piston when the actuator piston is in its second position but not when the actuator piston is in its first position.

2. The apparatus according to claim 1 comprising in addition a spring acting on the actuator piston to assist return travel of the actuator piston from its second position to its first position.

3. The apparatus according to claim 1 wherein the delivery tube in addition includes a check valve to restrict back-flow of the fluid delivered to the orifice means connected to the outlet end of the actuator cylinder.

4. The apparatus according to claim 1 wherein the source of fluid is a deformable receptacle.

5. The apparatus according to claim 1 wherein the orifice means connected to the outlet end of the actuator cylinder communicates with both the delivery tube and the space of the actuator cylinder above the actuator piston such that a mixture of fluid and air is delivered to the orifice means when the actuator piston slides from its first position to its second position.

6. The apparatus according to claim 5 wherein the actuator cylinder includes in addition an air intake means for allowing air in the space of the actuator cylinder above the actuator piston to enter the fluid source when the actuator piston is in its first position.

7. A dispensing apparatus for delivering fluid from a source of fluid when subjected to a positive pressure comprising:

(a) an actuator cylinder having an inlet means for inletting fluid communicating with the source of fluid and an outlet end connectable to orifice means for delivering the fluid to the atmosphere,

(b) an actuator piston slideable onto a fixed position delivery tube and the actuator piston being slideable within the actuator cylinder from a first position near the inlet means to a second position toward the outlet end, the piston being hollow and having at least one fluid inlet orifice communicating with the actuator cylinder inlet means when the actuator piston is in the first position but not when the actuator piston is in the second position, and

(c) the fixed position delivery tube having an exit end for delivering the fluid from the actuator piston to the orifice means connected to the outlet end of the actuator cylinder and having an entrance means communicating with the actuator piston for delivering fluid from the actuator piston to the delivery tube such that the interior of the delivery tube is in communication with the interior of the actuator piston at least when the actuator piston is between its first position and its second position.

8. The apparatus according to claim 7 comprising in addition a spring acting on the actuator piston to assist return travel of the actuator piston from its second position to its first position.

9. The apparatus according to claim 7 wherein the delivery tube in addition includes a check valve to restrict back-flow of the fluid delivered to the orifice means connected to the outlet end of the actuator cylinder.

10. The apparatus according to claim 7 wherein the source of fluid is a deformable receptacle.

11. The apparatus according to claim 7 wherein the orifice means connected to the outlet end of the actuator cylinder communicates with both the delivery tube and the space of the actuator cylinder above the actuator piston such that a mixture of fluid and air is delivered to the orifice means when the actuator piston slides from its first position to its second position.

12. The apparatus according to claim 11 wherein the actuator cylinder includes in addition an air intake means for allowing air in the space of the actuator cylinder above the actuator piston to enter the fluid source when the actuator piston is in its first position.