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公开(公告)号：US3811798A
公开(公告)日：1974-05-21
申请号：US27315472
申请日：1972-07-19
Applicant: HYDRAULIC SYST INC
Inventor： BICKFORD J
CPC classification number: F04B1/14 , F04B1/122 , F04B23/06 , F05C2201/0478
Abstract: A pump having pistons that actuate a pumping device by suction and compression and having novel means for sealing the fluid being pumped from the lubricating fluid and for ensuring lubrication between the pistons and their cylinders. The reciprocation of the pistons is made to pump the lubricating fluid between them and the cylinder and to return the fluid to an internal lubricant reservoir. A swash plate acts also as a circulating pump for sending the lubricating fluid through an external cooling reservoir.
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