Multi-valve pump head

A pump head comprising:

• a housing defining an aperture about a first axis, the aperture sized and shaped to receive a valve head therein;
• a grommet disposed between the housing and the aperture, the grommet comprising a first portion sized and shaped to accommodate a Schrader-type valve head and a second portion sized and shaped to accommodate a Presta-type valve head;
• a movable pin disposed within the housing coaxially with the first axis;
• the movable pin defining a pin notch disposed about an exterior circumference of the movable pin;
• a pin return spring coupled to the movable pin and coaxially with the first axis, the pin return spring biasing the movable pin towards the aperture;
• a first taper unit disposed in the housing coaxially with the first axis;
• a second taper unit coupled to the pin return spring, the second taper unit disposed in the housing coaxially with the first axis and adjacent to the first taper unit, the second taper unit biased away the first taper unit;
• an elastic taper C-ring disposed between the first and second taper units;
• a lock arm pivotally coupled to the housing, the lock arm configured to press the second taper unit towards the first taper unit, thereby compressing the elastic taper C-ring circumferentially in at least one of two positions, the elastic taper C-ring compressed about the pin notch in the first position and about the valve head in the second position.