Self-locking coupling between a pump casing and a pump module
Inventors
Moser, Beat • Zweifel, Adrian • Widmer, Beat • Butler, Martin • Christen, Lukas • Good, Roman • Napoletano, Daniel
Assignees
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Publication Number
US-9938971-B2
Publication Date
2018-04-10
Expiration Date
Abstract
A device for producing a fluid jet suitable for hygienic requirements in mechanical wound cleaning, including removal of biological tissue, may include a drive casing with a drive and a pump module with a pump casing which can be detachably joined. The drive casing may include a positive-locking element and the pump casing may include a positive-locking counter-element. The positive-locking element may interact with the positive-locking counter-element so that the pump casing is imposed a pivotal motion relative to the drive casing until reaching a final position. In final position the pump casing may be connected to the drive casing and a drive element may be connected to an associated drive counter-element. Drive element and drive counter-element may be arranged eccentric to a pivot axis of the pivotal motion and may be formed so a positive-locking connection arises between the drive element and drive counter-element due to the pivotal motion.
Core Innovation
A device for producing a fluid jet for the removal of biological tissue includes a drive provided in a drive casing and a pump module with a pump casing. The drive casing and the pump module are detachably joined so that, during joining and until a final position is reached, the pump casing is connected to the drive casing, and in the final position at least one drive element of the drive in the drive casing is connected to an associated drive counter-element of the pump module.
The drive casing comprises at least one positive-locking element and the pump casing comprises at least one positive-locking counter-element. During joining, the positive-locking element interacts with the positive-locking counter-element such that the pump casing is imposed a pivotal motion relative to the drive casing, with the drive element and the drive counter-element arranged eccentric to a pivot axis. The eccentric arrangement and the pivotal motion are configured to cause a positive-locking connection between the drive element and the drive counter-element to arise due to the pivotal motion.
The joining further includes an axially reciprocal arrangement in which an abutment surface of at least one drive element abuts against a counter-surface of the drive counter-element before the final position has been reached. A drive pusher with its abutment surface abuts against a surface of a pump piston before axial joining of the drive casing and the pump casing is completed.
A hammerhead and a hammerhead seat are provided, with the hammerhead seat mounted in a rotationally fixed manner, and the hammerhead seat comprising a claw that engages in the final position axially over the hammerhead. The drive element defines a radial stop that interacts with the hammerhead to prevent pivoting of the pump module to the final position.
Claims Coverage
The partial content identifies one independent claim (clm-00001) with five inventive features. It describes a detachable drive casing/pump module connection using positive-locking elements, eccentric pivotal coupling, axial abutment before final position, and a hammerhead/hammerhead-seat claw and radial stop arrangement.
Detachable positive-locking eccentric pivotal coupling of drive element to drive counter-element
The drive casing and pump module are detachably joined such that the drive casing has at least one positive-locking element and the pump casing has at least one positive-locking counter-element, where interaction imposes a pivotal motion of the pump casing relative to the drive casing and a positive-locking connection arises due to the eccentric arrangement of the drive element and drive counter-element relative to a pivot axis.
Axial reciprocal abutment before reaching final position
At least one of the drive element and the drive counter-element is arranged axially reciprocal, and the drive element and drive counter-element are configured such that an abutment surface of the drive element abuts against a counter-surface of the drive counter-element before the final position is reached.
Drive pusher abuts against pump piston before axial direction joining completes
The drive element is formed by a drive pusher having an abutment surface that abuts against a surface of a pump piston, which forms the counter-surface of the drive counter-element, before joining of the drive casing and the pump module in the axial direction is completed.
Hammerhead and rotationally fixed hammerhead seat with claw engagement
One element forms a hammerhead and the other element forms a hammerhead seat adapted to engage over the hammerhead, where the element forming the hammerhead seat is mounted in a rotationally-fixed manner and the hammerhead seat comprises a claw engaging in the final position axially over the hammerhead.
Radial stop preventing pivoting of the pump module to the final position
The drive element defines a radial stop that interacts with the hammerhead to prevent pivoting of the pump module to the final position.
The inventive subject matter centers on a detachable positive-locking join that uses eccentric pivotal motion to create a positive-locking connection between drive elements and pump-module counter-elements, combined with axial abutment before final position and a hammerhead/hammerhead-seat claw engagement arrangement with a radial stop to prevent pivoting to the final position.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
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