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:
Aug. 18, 1981
Filed:
Jan. 03, 1977
Ramon Pareja, Minneapolis, MN (US);
Lear Siegler, Inc., Santa Monica, CA (US);
Abstract
A roller pump comprising a generally cylindrical housing and a generally cylindrical rotor disposed eccentrically within the housing, and having push rods arranged radially within the rotor for assisting in forcing radial motion of the rollers within the rotor during rotation of the rotor within the housing. A camming shaft is disposed within the housing, and arranged generally with the housing, the push rods making contact with the periphery of the camming shaft in order to provide radial motion of the push rods during rotation of the rotor. The cross-sectional dimension of the push rods is preferably equal to at least 331/3 percent of the axial length of the rollers, and secondarily preferably having a diameter generally equal to the roller diameter. The cross-sectional dimension of the push rods at the line of contact with the roller surface enables the pump to effectively handle highly viscous products.