| 摘要 |
<p>A inflator mechanism (10) has a valve (14) adapted to secure with the device to be inflated. A compressor (18) is fluidly coupled with the valve mechanism (14). The compressor mechanism (18) generates fluid to inflate the device. The compressor mechanism (18) includes a motor to drive a piston, a piston (42), a piston cylinder (48), an outlet (52) coupled between the piston cylinder (48) and the valve (14), and a housing (12). A biasing spring (54) is positioned in the housing (12) to exert a force on the cylinder (48). The biasing force maintains the cylinder (48) in a first position when the fluid in the cylinder (48) is at a low pressure. The cylinder (48) moves in the housing (12) against the force of the biasing spring (54) to a second position when the fluid in the cylinder (48) is at a high pressure. A displacement control valve (72) is associated with the cylinder (48) to control the fluid displacement of the compressor (18). Thus, at low pressure, fluid displacement is high and as pressure in the cylinder (48) increases, the fluid displacement is reduced. A power source (13) is coupled to drive the motor (28) of the compressor (18). <IMAGE></p> |
