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:
Jan. 18, 1983
Filed:
May. 16, 1980
Richard P Heintz, Kalamazoo, MI (US);
Other;
Abstract
A free piston engine pump system operates in response to internal combustion for pressurizing a working fluid to provide hydraulic power output. The free piston engine pump has double acting power pistons and pumping pistons fixedly attached as a main reciprocating member and movable relative to a housing, which itself may be relatively movable for mass balancing purposes. Air is supplied and exhaust products are exhausted from a pair of opposite combustion chambers by respective common intake and common exhaust valves that preferably are operated by a common actuator in direct or indirect (via a phasing valve) response to position of the main reciprocating member. Moreover, operation of fuel injectors and exhaust valves associated with respective combustion chambers is directly or indirectly (via the phasing valve) controlled in response to the position of the main reciprocating member in the housing and/or fluid pressure in respective pumping chambers. A pressure responsive cycling valve controls operation of the free piston engine pump to initiate start-up, and a cooling air control valve controls delivery of cooling air to the exhaust valves and passages during each exhaust cycle.