Compact manual pump having selectable low pressure and high pressure pumping modes

摘要

A compact manual pump includes a body, a valve assembly connected with the body, and a first cylinder assembly rotatable with respect to the body. The body includes first and second collect inlets, and an exhaust outlet. The first cylinder assembly includes a seat, first and second inflating inlets. While the first cylinder assembly is rotated to switch to low pressure pumping mode, the first inflating inlet is connected with the first collect inlet and the second inflating inlet is connected with the second collect inlet and the exhaust outlet is blocked by the seat. While the first cylinder assembly is rotated to switch to high pressure pumping mode, the first inflating inlet is connected with the first collect inlet and the second inflating inlet is connected with the exhaust outlet and the second collect inlet is blocked by the seat.

主权项

1. A compact manual pump having selectable low pressure and high pressure pumping modes comprising:
a body defined a first axis, with the body having first and second ends, with the first and second ends extending along the first axis and disposed opposite to each other, with the body including a chamber located at the first end and passing through two opposite sides thereof, collect and exhaust channels disposed separately, with the collect channel including a collect outlet connected with the chamber, first and second collect inlets disposed adjacent to the second end, with an axis of the first collect inlet located along the first axis, with an axis of the second collect inlet located at a first position radially spaced from the first axis, with a first radial distance defined between the axis of the first collect inlet and the axis of the second collect inlet, with the exhaust channel including an exhaust inlet connected with an exterior surface of the body and an exhaust outlet disposed at the second end, with an axis of the exhaust outlet located at a second position radially spaced from the first axis, with a second radial distance defined between the axis of the exhaust outlet and the axis of the first collect inlet, with the second radial distance equal to the first radial distance; a valve assembly for connecting a valve allowed to inflate connected with the chamber; a first cylinder assembly pivotally connected with the second end of the body and rotatable with respect to the body about the first axis to switch between low pressure and high pressure pumping modes, with the first cylinder assembly including a seat, inner and outer cylinders, with an inner diameter defined in the inner cylinder less than an inner diameter defined in the outer cylinder, with the seat including pivoting and connecting ends extending along the first axis and disposed opposite to each other, with the pivoting end pivotally connected with the second of the body, with the seat including first and second inflating channels not connected with each other therein, with the first inflating channel including a first inflating inlet disposed at the pivoting end, with an axis defined in the first inflating inlet extending along the first axis, with the second inflating channel including a second inflating inlet, with a third radial distance defined between an axis defined in the second inflating inlet and the axis defined in the first inflating inlet, with the third radial distance equal to the first radial distance, with an end of the inner cylinder connected with the a central portion of the connecting end, with an end of the outer cylinder connected with a periphery of the connecting end, wherein a non-circular shaped groove is formed at a peripheral edge of the pivoting end, wherein an annular wall is formed at the second of the body and adapted to surround the peripheral edge of the pivoting end, with the annular wall including two through holes disposed opposite to the groove, with the two through holes penetrating to the annular wall, with a pair of restricting pins respectively disposed through the through holes and the groove to limit the seat rotatable in the annular wall and not slidable along the first axis, with the groove including first and second level sides selectively abutted against the pair of restricting pins respectively; and a second cylinder assembly movable reciprocally with respect to the first cylinder assembly to induce air from the atmosphere into the first and second cylinder assemblies; wherein while the first cylinder assembly is rotated to switch to low pressure pumping mode, the first inflating inlet is connected with the first collect inlet and the second inflating inlet is connected with the second collect inlet and the exhaust outlet is blocked by the seat and the first level side is abutted against the restricting pin; wherein while the first cylinder assembly is rotated to switch to high pressure pumping mode, the first inflating inlet is connected with the first collect inlet and the second inflating inlet is connected with the exhaust outlet and the second collect inlet is blocked by the seat and the second level side is abutted against the one of the restricting pin.