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:
Feb. 08, 1977
Filed:
May. 15, 1975
Frank E Keske, Chillicothe, IL (US);
Caterpillar Tractor Co., Peoria, IL (US);
Abstract
A lubrication pump comprises a housing having a cup-shaped member reciprocally mounted thereon, a rod secured to the member and disposed internally thereof, a piston slidably mounted on the rod to define an expansible working chamber between the piston and the housing, a first check valve for communicating lubricating fluid into the chamber upon upward movement of the piston and a second check valve for communicating pressurized lubricating fluid exteriorly of the pump upon downward movement of the piston. A first coil spring is preferably mounted between the piston and member whereas a second coil spring is preferably mounted between the base of the housing and the piston.