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|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||418/081 ; 418/104 ; 418/259 ; 417/361|
|발명자 / 주소||
|대리인 / 주소||
|인용정보||피인용 횟수 : 5 인용 특허 : 6|
A light-weight vacuum pump has a multi-wiper member circular wiper member support and impeller which is eccentrically mounted within a pump housing. The multi wiper member circular support carries from about five to nine wiper members each mounted within a slot extending substantially the length of the support, with each wiper member being centrifically urged outwardly to wipingly engage an inner surface of a round or elliptical walled pump housing. Eccentric action enables the wiper members to be extended to create a large space between adjacent wiper m...
[ What is claimed:] [1.]1. A vacuum pump comprising:a pump housing having a generally annularly cylindrical shaped rear pump housing portion having a front opening and a rear wall, and having a smooth inner cylindrically shaped surface having a concentric center, a first flow opening and a second flow opening in alignment with said concentric center along a centerline, and a front support cover having a first portion sealably engageable over said front opening of said generally annularly cylindrical shaped rear pump housing portion, and a second portion ...