Bellows

About: Bellows is a research topic. Over the lifetime, 15312 publications have been published within this topic receiving 73914 citations.

Pump for pumping corrosive fluids

Abstract: A submersible pump and filter unit for pumping and filtering acids comprises a removable pump cartridge (13) and filter unit (14) housed in respective cylindrical cavities (11, 12) in a housing (10). The pump cartridge (13) is a gas-driven double acting bellows unit with a cylindrical body (13A), the bellows (21, 22) and the body (13A) being formed of PTFE. Each bellows (21, 22) is at a respective end of a reciprocating rod (36) which is journaled coaxially in the body (13A) and which extends through a central aperture (16) in the body (13A). Control gear including a logic control valve (41) is housed in the aperture (16) and is thereby encased in PTFE structure and shielded from acid.

Method of making a metallic bellows

Abstract: In a method of fabricating a bellows by bulge forming, an annealing step is carried out during the bulge forming process of the bellows so that the capability of the material to elongate is recovered, and the workability of the bellows is improved in effect. In particular, the ratio of the outer diameter to the inner diameter can be made greater than a value that can be achieved by a single forming step. Therefore, the deflection (stroke) of each annular bulge or pleat can be increased for a given stress or the number of annular bulges and the length of the bellows can be decreased for a given stroke of the bellows.

Apparatus and method for dispensing a fluid

Abstract: A fluid transfer assembly comprises a housing for accommodating a fluid A bellows member disposed in the housing defines an opening therethrough adapted to be in fluid communication with an applicator assembly The bellows member is adapted to operatively engage the applicator assembly for extension in a first direction and contraction in a second direction The bellows member seals against the inner surface of the housing during extension and contraction for defining a variable volume chamber with the housing Expansion of the bellows member in the first direction reduces the chamber volume for generating positive pressure in the housing and forcing fluid through a valve to the applicator assembly Contraction of the bellows member in the second direction increases the chamber volume for generating negative pressure within the housing for drawing fluid into the chamber

Device for attaching bellows to a cylindrical member

Abstract: A device for attaching a bellows to a cylindrical member, particularly a ball pin of a rack articulation for automotive vehicles. In order to permit a nonslippable attachment of the bellows even to unmachined pins which vary slightly in diameter, it is proposed to arrange between the bellows and the ball pin an annular disk having a closed outer edge and an inner edge which is interrupted by radially extending slots, the inner edge consisting of a plurality of resilient segments which are bent alternately in opposite directions and are pre-stressed against the ball pin.