Method and apparatus for modifying pressure within a fluid dispenser
First Claim
1. A fluid dispenser comprising:
- a barrel having a reservoir chamber, the barrel having an upper portion and a lower portion;
a cap located on top of the upper portion of the barrel and connected to the reservoir chamber, the cap having an external surface with at least one hole therethrough;
a valve comprising a biasing member and a hole sealer, the valve being located in the hole in the cap at the point where a downward force is applied against the cap;
a coupler having a dispense chamber, the coupler being coaxial with the barrel and wherein the barrel lower portion moves into the dispense chamber during dispensing of fluid; and
a vent located between the cap and the reservoir chamber, the vent including a vent opening and a vent material composed of oliophobic material.
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Accused Products
Abstract
A fluid dispenser useful in automated biological reaction systems comprising a barrel having a reservoir chamber, the barrel having an upper portion and a lower portion, a cap located on top of the upper portion of the barrel and connected to the reservoir chamber, the cap having an external surface with at least one hole therethrough, a valve comprising a biasing member and a hole sealer, the valve being located in the hole in the cap at the point where a downward force is applied against the cap, a coupler having a dispense chamber, the coupler being coaxial with the barrel and wherein the barrel lower portion moves into the dispense chamber during dispensing of fluid, and a vent located between the cap and the reservoir chamber, the vent including a vent opening and a vent material composed of oliophobic material.
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Citations
16 Claims
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1. A fluid dispenser comprising:
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a barrel having a reservoir chamber, the barrel having an upper portion and a lower portion; a cap located on top of the upper portion of the barrel and connected to the reservoir chamber, the cap having an external surface with at least one hole therethrough; a valve comprising a biasing member and a hole sealer, the valve being located in the hole in the cap at the point where a downward force is applied against the cap; a coupler having a dispense chamber, the coupler being coaxial with the barrel and wherein the barrel lower portion moves into the dispense chamber during dispensing of fluid; and a vent located between the cap and the reservoir chamber, the vent including a vent opening and a vent material composed of oliophobic material. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A fluid dispenser comprising:
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a barrel having a reservoir chamber, the barrel having an upper portion and a lower portion; a cap located on top of the upper portion of the barrel and connected to the reservoir chamber, the cap having an external surface with at least one hole therethrough; a valve comprising a single-piece umbrella-shaped valve having a biasing portion, a stem and a seal located in the cap hole, the valve being located at the point where a downward force is applied against the cap; a coupler having a dispense chamber, the coupler being coaxial with the barrel and wherein the barrel lower portion moves into the dispense chamber during dispensing of fluid; and a vent located between the cap and the reservoir chamber, the vent including a vent opening and a vent material composed of oliophobic material. - View Dependent Claims (8, 9, 10, 11)
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12. A fluid dispenser comprising:
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a barrel having a reservoir chamber, the barrel having upper and lower portions; a cap located on top of the upper portion of the barrel and connected to the reservoir chamber, the cap having an external surface with at least one hole therethrough, said cap further comprises a raised surface on the cap external surface that mates with the biasing portion of the valve; a valve comprising a biasing member and a hole sealer, the valve being located in the hole in the cap at the point where a downward force is applied against the cap; a coupler having a dispense chamber, the coupler being coaxial with the barrel and wherein the barrel lower portion moves into the dispense chamber during dispensing of fluid; and a vent located between the cap and the reservoir chamber, the vent including a vent opening and a vent material composed of oliophobic material. - View Dependent Claims (13, 14, 15, 16)
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Specification