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Publication Number
US-11486382-B2
Publication Date
2022-11-01
Expiration Date
Abstract
A device for supplying and/or aspirating a fluid substance to or from a human or animal body is provided, which device has a drive unit with a drive, an attachment part, and coupling element. The attachment part has a peristaltic pump unit with a pump head having roller elements which are movable freely and independently of one another and serve for rolling on a hose. The coupling element serves to transmit a movement from the drive to the pump head. The pump head has a decoupled state in which the roller elements apply no or a comparatively low mechanical pressure to the hose, and a coupled state in which the roller elements are pressed by the coupling element against the hose with a comparatively high mechanical pressure.
Core Innovation
The invention provides a device for supplying and/or aspirating a fluid substance to or from a human or animal body. The device includes a drive unit with a drive and an attachable attachment part having a peristaltic pump unit with a pump head, a hose guide, and a hose placed in the hose guide. Several roller elements roll on the hose to convey the fluid substance through the hose.
A coupling element transmits a movement from the drive to the pump head when the attachment part is attached as intended to the drive unit. The pump head has a decoupled state in which the roller elements can touch each other and apply no mechanical pressure or comparatively low mechanical pressure to the hose. The pump head also has a coupled state in which the pump head is coupled to the coupling element and the roller elements are pressed by the coupling element against the hose with comparatively high mechanical pressure.
In the decoupled state, the roller elements are movable freely and independently of each other within a range laterally limited by the hose in the hose guide. The coupling element and the roller elements have cooperating toothing areas so that, in the coupled state, a movement of the coupling element is transmitted directly to the roller elements.
The roller elements are formed as hollow wheels having an outer toothed ring that forms the second toothing area and a radially outwardly directed surface, with the outer toothed ring arranged radially inside of the radially outwardly directed surface.
Claims Coverage
The patent includes two independent claims. Across both claims, the coverage centers on a peristaltic pump unit with a pump head that operates in a decoupled state and a coupled state, using toothing areas for direct movement transmission and hollow-wheel roller elements with an outer toothed ring.
Peristaltic pump head with coupled and decoupled pressure states
A device for supplying and/or aspirating a fluid substance to or from a human or animal body, including a drive unit and an attachable attachment part with a peristaltic pump unit, where the pump head has several roller elements to convey the fluid through the hose. The pump head provides a decoupled state in which the roller elements apply no mechanical pressure or comparatively low mechanical pressure to the hose, and a coupled state in which the roller elements are pressed against the hose by the coupling element with comparatively high mechanical pressure.
Direct transmission via toothing areas between coupling element and hollow wheels
The coupling element has a first toothing area and each roller element has a second toothing area engaging the first toothing area in the coupled state so that a movement of the coupling element is transmitted directly to the roller elements. Each roller element is a hollow wheel with an outer toothed ring forming the second toothing area and a radially outwardly directed surface, with the outer toothed ring arranged radially inside of the radially outwardly directed surface.
Attachment part with decoupled independent roller movement and coupled toothing engagement
An attachment part of a device for supplying and/or aspirating a fluid substance to or from a human or animal body, including a peristaltic pump unit with a pump head, hose guide, and hose. The pump head has several roller elements rolling on the hose to convey the fluid substance and is coupled to a coupling element to transmit movement from a drive to the pump head, wherein the decoupled state allows the roller elements to touch each other and apply no mechanical pressure or comparatively low mechanical pressure to the hose, and the coupled state presses the roller elements against the hose with comparatively high mechanical pressure.
Overall, claim coverage requires a peristaltic pump head providing decoupled and coupled mechanical-pressure states for the roller elements, direct movement transmission through cooperating toothing areas between a coupling element and the roller elements, and hollow-wheel roller elements with an outer toothed ring arranged radially inside a radially outwardly directed surface.
Stated Advantages
The invention reduces hose wear during storage/transport by applying no/low pressure to the hose in a decoupled state.
The invention enables efficient pumping by applying comparatively high mechanical pressure to the hose in a coupled state.
Documented Applications
Negative-pressure wound therapy.
Instillation/irrigation.
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