Patent TW-231329-B (TW)
Title: Pressure-adjustable air pump
Inventor: LIN JI-SHOW
IPC: F04B33/00
Filed: 1994-04-19
Granted: 1994-10-01
Abstract: A pressure-adjustable air pump includes: - the first and the second chamber bodies that are positioned in parallel;he first and the second air rooms housed individually in the chamberody, which both sides of the first chamber body provide single-directionntake function to let air coming to the first air room only while oneide of the second chamber body provides single-direction intake function;ne end cover that seals the other end of the second chamber body; andn air hole, which is located between the two chamber bodies and on theame side of the end cover, in connection with the two air rooms; - the first and the second pistons housed within the first and the secondir rooms respectively; the first, second, third and fourth compressionooms that are divided from the two chamber bodies and the second and theourth compression rooms are connected by the air hole; a reverse blockingalve located on one side of the first piston, which the first piston isingle-direction piston, allowing the air of the first compression roometting into the first piston; an air hole drilled along the radialirection of the second piston, which the second piston is a two-directioniston. - the first and the second piston rods that one side of the two pistonods separately penetrates one side of the two chamber bodies to link withhe two pistons housed within the two air rooms by means of air-sealingay; the first and the second air passages that the first connects withhe reverse blocking valve on the first piston and the second air passageonnects with the air hole of the second piston; the air in the firstompression room going from the reverse blocking valve into the first airassage and the air in the third compression room going to the second airassage while the the first and the third compression rooms are compressedy the pistons; the air in the second compression room that flows into theourth compression together with the air in the fourth compression roomlowing to the second air passage while the the second and the fourthompression rooms are compressed by the pistons; - an air valve connector that includes internal space penetrating from topo down and the circular side has the top and bottom divisions containinghe first and the second flow channels, which are used by the air valveonnector to connect with the other ends of the two piston rods respectivelyor linking with the internal space, in connection with the internal space; - an air valve device that is accommodated in the internal spaceorresponding to the location of the second flow channel. - a pressure-releasing part that is installed in the internal space withespect to the first flow channel and is assembled tightly on the wall ofhe internal space to enable the sliding between two position along thexis of the internal space; the top of the internal space at the firstosition that provide the blockade to outside world such that the air inhe second flow channel must flow to the air valve device while the flowingtate is blocked between the first and the second flow channels for theecond position such that the second flow channel is open with the airalve device and the first flow channel is open by means of the connectionetween the top of the internal space and outside world.