The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 21, 2000
Filed:
Nov. 26, 1997
Kiyoshi Makihara, Aichi, JP;
Nidek Co., Ltd., Aichi, JP;
Abstract
An irrigating fluid from irrigating bottle (10) is supplied to the eye under operation through the tip of US handpiece (2) and sucked in through flexible aspirating tube (16) together with the residue in the eye. Peristaltic pump (20) sucks in the liquefied residue in the eye by means of rollers (21) which compress the aspirating tube (16) to collapse as they rotate. Block (28) is provided just prior to the point where the rollers (21) start compressing the aspirating tube (16) to collapse, such that the aspirating tube (16) is flattened while securing the aspirating path in the tube (16) as it is held between the block (28) and tube receptacle (25). The change in the capacity of the aspirating tube (16) which occurs when the rollers (21) compress the aspirating tube (16) is limited so that only a small volume of the liquefied residue will flow back. Thus, it is possible to reduce the pulsation from aspiration, thereby ensuring consistent rate of inflow.