초록 ▼

A double acting, self-priming bellows-type pump has a pair of bellows that work as displacement elements arranged each in a cylinder chamber mutually and synchronously interlocked by piston rod, so that at the same time as one bellows draws in, the other bellows delivers. One side of each bellows re

A double acting, self-priming bellows-type pump has a pair of bellows that work as displacement elements arranged each in a cylinder chamber mutually and synchronously interlocked by piston rod, so that at the same time as one bellows draws in, the other bellows delivers. One side of each bellows receives the medium to be delivered and the other side receives a medium under pressure. In at least the lower cylinder the bellows is connected to the top wall of the cylinder chamber so that the space around the outside of the bellows may be used for pumping fluid. A guide element is mounted in the lower chamber for supporting the bellows of the lower chamber and preventing the same from buckling during the alternating pressurizing and venting thereof during a pumping cycle.

대표청구항 ▼

A double acting bellows pump comprising: an upper chamber having an upper wall and a lower wall, said walls of the upper chamber being disposed in facing relationship and being spaced apart so as to define a first hollow interior space therebetween; a lower chamber having an upper wall and a lower w

A double acting bellows pump comprising: an upper chamber having an upper wall and a lower wall, said walls of the upper chamber being disposed in facing relationship and being spaced apart so as to define a first hollow interior space therebetween; a lower chamber having an upper wall and a lower wall, said walls of the lower chamber being disposed in facing relationship and being spaced apart so as to define a second hollow interior spaced therebetween, said upper chamber being positioned above the lower chamber with said lower wall of the upper chamber facing the upper wall of the lower chamber; an elongated piston rod extending through the upper wall of the lower chamber and through the lower wall of the upper chamber, said rod having a first end disposed in said first space and a second end disposed in said second space, said piston rod being mounted for longitudinal reciprocation; a first base plate mounted at said first end of the rod; a second base plate mounted at said second end of the rod; a first bellows in said upper chamber, said first bellows having one end hermetically connected to the first base plate and another end hermetically connected to one of the walls of the chamber so as to divide the first space into inner and outer portions; a second bellows in said lower chamber, said second bellows having one end hermetically connected to the second base plate and another end hermetically connected to the upper wall of the lower chamber so as to divide the second space into inner and outer portions; a medium delivery piping system having intake and outlet lines for the medium to be delivered, said system including a first line which communicates with one of the portions of the first space and a second line which communicates with the outer portion of the second space, the arrangement being such that one of the bellows draws in and the other bellows delivers with each stroke of the piston rod; a pressurized fluid supply system for driving said piston rod, said pressurized fluid supply system having a third line which communicates with the other portion of the first space and a fourth line which communicates with the inner portion of the second space, said pressurized fluid supply system including valve means for alternatively pressurizing and venting the other portion of the first space and the inner portion of the second space so as to cause said rod to reciprocate longitudinally; and a guide element mounted in said lower chamber for supporting said second bellows during the alternating pressurizing and venting thereof.