Combination pump head

Details Combination pump head Combination pump head

1996-04-22

1998-06-09

McMahon, Marguerite

Fluid handling

Inflatable article

137231, F16K 1520

Patent

active

057620954

ABSTRACT:
A pump head comprising a main body defining a chamber and having a top end and a bottom end, a force transmitting member slidably positioned in the chamber adjacent to the top end of the main body, a resilient collar positioned in the chamber adjacent to the bottom end of the main body and in engagement with the force transmitting member, and a camming device pivotally mounted at the top end of the main body. The collar defines an axial cavity having an inner wall and an inside diameter. The camming device has first, second and third cam surfaces in selective engagement with the force transmitting member. The second and third cam surfaces act to displace the force-transmitting member into the chamber to different extents to compress the collar. Compression of the collar decreases the inner diameter of the collar, and thus causes the collar to sealingly engage the valve stem positioned in the axial cavity. Compression of the collar at differing levels allows the pump head to work with many valve stems of differing sizes.

REFERENCES:
patent: 3926205 (1975-12-01), Gourlet
patent: 5379796 (1995-01-01), Wang
patent: 5645100 (1997-07-01), Chuang et al.

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