Pneumatic valve adapter for bicycle tire
A pneumatic valve adapter that couples with a valve stem of a bicycle tire is provided. The valve adapter comprises a cap, a seal, a biasing member, and a sealing member. The cap includes a pin passage and a circumferential concavity on an outer diameter. The receiver is coupled to the cap and is couplable with the valve stem, the receiver having a first opening that is fluidly coupled to a central passage. The seal has a circular shape and cross-section, the seal is disposed between the cap and the end of the receiver, the seal having a second hole that fluidly couples the first opening and the pin passage. The biasing member is disposed in the central passage. The sealing member is disposed within the central passage and biased against the seal by the biasing member, the sealing member being movable between a first position and a second position.
1. A pneumatic valve adapter configured to couple with a valve stem of a bicycle tire, the pneumatic valve adapter comprising:
a cap member having a pin passage therethrough having a first diameter and having a circumferential concavity on an outer diameter;
a receiver coupled to the cap member and having a fastener configured to removably couple with the valve stem, the receiver having a first opening on an end that is fluidly coupled to a central passage, the first opening having a second diameter;
a seal having a circular shape and a circular cross-section, the seal disposed between the cap member and the end of the receiver, the seal having a second hole with a third diameter that fluidly couples the first opening and the pin passage, the third diameter being smaller than the first diameter;
a biasing member disposed in the central passage;
a sealing member movably disposed within the central passage and biased against the seal by the biasing member, the sealing member being movable between a first position engaging the seal and a second position separated from the seal and allowing a flow of gas from the pin passage to the central passage; and
an actuator pin at least partially disposed in the receiver, the actuator pin being sized to extend into the valve stem of the bicycle tire;
wherein the actuator pin displaces a plug in the valve stem when the pneumatic valve adapter is coupled to the valve stem allowing the flow gas through the valve stem;
wherein the actuator pin is fixed relative to the receiver.
2. The adapter of claim 1 , further comprising
an engagement plate disposed within the central passage;
wherein the actuator pin is operably coupled to the engagement plate.
3. The adapter of claim 2 , wherein the engagement plate is perforated to fluidly couple the central passage to the valve stem.
4. The adapter of claim 1 , further comprising a seal disposed between the valve stem and the receiver.
5. The adapter of claim 3 , wherein the engagement plate defines a shoulder, the biasing member is disposed between the shoulder and the sealing member.
6. A bicycle inner tube comprising: a pressure vessel configured to receive pressurized air; a valve stem operably coupled to the pressure vessel; and a pneumatic valve adapter comprising: a cap member having a pin passage therethrough having a first diameter and having a circumferential concavity on an outer diameter; a receiver coupled to the cap member and having a fastener configured to removably couple with the valve stem, the receiver having a first opening on an end opposite the valve stem that is fluidly coupled to a central passage, the first opening having a second diameter, the central passage being fluidly coupled to the pressure vesselvia the valve stem; a seal having a circular shape and a circular cross-section, the seal disposed between the cap member and the end of the receiver, the seal having a second hole with a third diameter that fluidly couples the first opening and the pin passage, the third diameter being smaller than the first diameter; a biasing member disposed in the central passage; and a sealing member movably disposed within the central passage and biased against the seal by the biasing member, the sealing member being movable between a first position engaging the seal and a second position separated from the seal and allowing a flow of gas from the pin passage to the central passage; and an actuator pin at least partially disposed in the receiver, the actuator pin being sized to extend into the valve stem; wherein the actuator pin displaces a plug in the valve stem when the pneumatic valve adapter is coupled to the valve stem allowing the flow gas through the valve stem; wherein the actuator pin is fixed relative to the receiver.
7. The bicycle inner tube of claim 6 , wherein the pressure vessel is an inner tube.
8. The bicycle inner tube of claim 6 , wherein the valve stem includes a valve, the plug being disposed in the valve.
9. The bicycle inner tube of claim 8 , wherein the pneumatic valve adapter further comprises
an engagement plate disposed within the central passage;
wherein the actuator pin is operably coupled to the engagement plate.
10. The bicycle inner tube of claim 9 , wherein the engagement plate is perforated to fluidly couple the central passage to the valve stem.
11. A bicycle tire inflation system for a bicycle tire having a valve stem, the system comprising: the pneumatic valve adapter comprising: a cap member having a pin passage therethrough having a first diameter and having a circumferential concavity on an outer diameter; a receiver coupled to the cap member and having a fastener configured to removably couple with the valve stem, the receiver having a first opening on an end that is fluidly coupled to a central passage, the first opening having a second diameter; a seal having a circular shape and a circular cross-section, the seal disposed between the cap memberand the end of the receiver, the seal having a second hole with a third diameter that fluidly couples the first opening and the pin passage, the third diameter being smaller than the first diameter; a biasing member disposed in the central passage; a sealing member movably disposed within the central passage and biased against the seal by the biasing member, the sealing member being movable between a first position engaging the seal and a second position separated from the seal and allowing a flow of gas from the pin passage to the central passage; and an actuator pin at least partially disposed in the receiver, the actuator pin being sized to extend into the valve stem; a pump head having an inflation pin having a diameter that is greater than the third diameter, the pump head being configured to removably couple to the pneumatic valve adapter; wherein the actuator pin displaces a plug in the valve stem when the pneumatic valve adapter is coupled to the valve stem allowing the flow gas through the valve stem; wherein the actuator pin is fixed relative to the receiver.
12. The system of claim 11 , wherein the pump head further includes at least one ball is operable to engage with the circumferential concavity during operation when the pump head is coupled to the pneumatic valve adapter.
13. The system of claim 12 , further comprising a sleeve disposed about the at least one ball and configured to bias the at least one ball into the circumferential concavity during operation when the pump head is coupled to the pneumatic valve adapter.
14. The system of claim 11 , wherein the inflation pin is sized to pass through the pin passage and seal against the seal during operation when the pump head is coupled to the pneumatic valve adapter.
15. The system of claim 11 , wherein the pump head further comprises an intake passage and an air source attachment member.
16. The system of claim 11 , wherein the pump head further comprises a pin seat configured to engage the inflation pin and a connecting passage that is in fluid communication with the inflation pin and the air intake passage.