Pump head for bicycle tire inner tube with pneumatic valve
A pump-head configured to couple with a bicycle inner tube valve stem or tubeless valve stem is provided. The pump-head includes a housing, inflation pin, a plurality of members and a biasing member. The housing has an attachment member that couples with an air source, the attachment member having an air inlet passage and a collar with a plurality of passages disposed about a periphery of the collar, the plurality of passages extending from an outer diameter of the collar to an inner bore. The inflation pin is coupled to the housing and the air inlet passage, the inflation pin having an end disposed within the inner bore. The members are associated with, and at least partially disposed in, one of the plurality of passages. A biasing member is disposed about the periphery of the plurality of members to biasing each of the members towards the inflation pin.
1. A pump-head configured to couple with a bicycle inner tube valve stem or tubeless valve stem, the pump-head comprising: a housing having an attachment member configured to couple with an air source, the attachment member having an air inlet passage, the housing further having a collar with a plurality of passages disposed about a periphery of the collar, the plurality of passages extending from an outer diameter of the collar to an inner bore; a stationary inflation pin coupled to the housing and fluidly coupled to the air inlet passage, the stationary inflation pin having an end disposed within the inner bore; a plurality of members are provided wherein each of the plurality of members is associated with, and at least partially disposed in, one of the plurality of passages; a biasing member disposed about the periphery of the plurality of members, the biasing member biasing each of the plurality of members towards the inflation pin; further comprising a pin seat coupled to the housing, the stationary inflation pin being coupled to the pin seat wherein the pin seat includes a pin receiver sized to receive the stationary inflation pin and a connecting passage fluidly coupled to the pin receiver and the air inlet passage.
2. The pump-head of claim 1 , wherein the stationary inflation pin includes a central passage extending axially therethrough, the central passage being fluidly coupled to the connecting passage and the inner bore.
3. The pump-head of claim 2 , wherein the stationary inflation pin further includes an outlet adjacent the end, the outlet fluidly coupling the central passage to the inner bore.
4. The pump-head of claim 3 , wherein the outlet is perpendicular to the central passage.
5. The pump-head of claim 1 , wherein the plurality of members are a plurality of ball bearings.
6. The pump-head of claim 5 , wherein each of the plurality of passages has a first portion at the inner bore having a first diameter and a second portion having a second diameter, the first diameter being smaller than the second diameter.
7. The pump-head of claim 6 , wherein each of the plurality of ball bearings has a third diameter that is larger than the first diameter.
8. The pump-head of claim 7 , wherein the collar has a wall thickness, the third diameter being larger than the wall thickness.
9. The pump-head of claim 1 , wherein the biasing member is an elastic sleeve that envelopes the collar.
10. The pump-head of claim 1 , wherein the attachment member is integral with the housing.
11. The pump-head of claim 1 , wherein the attachment member is removably coupled to the housing.
12. The pump-head of claim 1 , wherein the attachment member extends substantially perpendicular to a central axis of the housing.
13. A pump-head configured to couple with a bicycle inner tube valve stem or tubeless valve stem, the pump-head comprising: a housing having a collar on one end with an inner bore, a first passage extends perpendicular to an axis of the housing, and a second passage extends between the inner bore and the first passage; an attachment member having an air inlet passage is coupled to the first passage, the attachment member being configured to couple with an air source; an inflation pin is coupled to the second passage, the inflation pin having a central passage that fluidly couples the inner bore and the first passage; a plurality of members are provided wherein each of the plurality of members is associated with, and at least partially disposed in, one of the plurality of passages; and a biasing member disposed about the periphery of the plurality of members, the biasing member biasing each of the plurality of members towards the inflation pin wherein the biasing member is an elastic sleeve that envelopes the collar further comprising a member disposed about the housing and the elastic sleeve.
14. The pump-head of claim 13 , further comprising a seal member disposed about the inflation pin to seal the second passage from the inner bore.
15. The pump-head of claim 13 , wherein the plurality of members are a plurality of ball bearings.
16. The pump-head of claim 15 , wherein the plurality of passages each include a first portion at the inner bore having a first diameter and a second portion having a second diameter, the first diameter being smaller than the second diameter, the second diameter being larger than a diameter of the plurality of ball bearings.
17. The pump-head of claim 13 , wherein the stationary inflation pin further includes an outlet that is perpendicular to the central passage.