초록 ▼

A pump includes a pair of circular metal bellows rigidly secured to the pump housing at the perimeter of their accordion-like ring structures and interconnected at their centers so as to be capable of flexing in phase. An electrical coil is attached to the interconnected bellows and is axially movab

A pump includes a pair of circular metal bellows rigidly secured to the pump housing at the perimeter of their accordion-like ring structures and interconnected at their centers so as to be capable of flexing in phase. An electrical coil is attached to the interconnected bellows and is axially movable with the bellows. The coil is surrounded by a permanent magnet structure secured to the pump housing. Each bellows communicates with an associated fluid chamber which has a valve structure for the inlet and outlet of fluid. The coil is electrically connected to an alternating current power supply, the connection being made through the electrically conductive bellows. The bellows flex in phase in the presence of the alternating current to the coil and thus alternately pull fluid in and force fluid out of the respective fluid chambers. Since the fluid chambers are connected to a common fluid output and since the bellows axially flex in phase, there are two pressure pulses per pump cycle.

대표청구항 ▼

A pump comprising: a pair of flexure elements, at least one of the flexure elements being electrically conductive; means for supporting the flexure elements in spaced-apart relationship with their directions of flexure being generally collinear; means for rigidly connecting the flexure elements toge

A pump comprising: a pair of flexure elements, at least one of the flexure elements being electrically conductive; means for supporting the flexure elements in spaced-apart relationship with their directions of flexure being generally collinear; means for rigidly connecting the flexure elements together generally along their directions of flexure, whereby the spaced-apart flexure elements are capable of flexing in phase; an electrically conductive coil secured to and electrically coupled with said at least one flexure element and movable therewith during flexure; means located proximate the coil for generating a magnetic field generally perpendicular to the conductive paths in the coil; a pair of end plates attached to respective flexure elements and defining fluid chambers therewith, the end plate attached to said at least one flexure element being electrically conductive and electrically coupled with said at least one flexure element, each end plate being rigidly secured to the supporting means for the flexure elements and thereby immovable during flexure; and means for allowing the entry and exit of fluid into and out of each fluid chamber, whereby when an alternating current is supplied through said at least one end plate and attached flexure element to the coil, the coil and connected flexure elements flex in alternating directions in phase with the current and fluid is alternately drawn into and forced out of the fluid chambers.