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:
Sep. 14, 1993
Filed:
Apr. 22, 1992
Donald F Solomon, Hemet, CA (US);
Product Research and Development, Santa Ana, CA (US);
Abstract
A pump connectible to fluid under pressure comprising a housing having a cavity and a differential area piston reciprocable in the cavity on pumping and reset strokes and dividing the cavity into an inlet chamber, an outlet chamber and a reversing chamber. The housing has an inlet port communicating with the inlet chamber and connectible to the fluid under pressure, a water port communicating with the outlet chamber and a reversing port communicating with the reversing chamber. The piston has a passage leading from the inlet chamber to the outlet chamber. A first valve opens and closes the passage and a second valve is provided in the housing. A cam assembly opens and closes the first and second valves as a function of the position of the piston in the cavity.