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. 26, 1986
Filed:
Dec. 28, 1983
Chapman Young, III, Steamboat Springs, CO (US);
Other;
Abstract
A device generates pulsed liquid jets through a cumulative nozzle at high repetition rates by using a controlled oscillatory motion of the nozzle assembly coupled with the inertia of the water package and a piston to effectively evacuate the nozzle prior to generation of each jet pulse. The cumulative nozzle can be of any form, such as exponential, hyperbolic, cissoid, etc. Forward motion of the nozzle assembly serves to empty the nozzle of liquid residual therein from the previously generated jet. That forward motion also positions the residual liquid, freshly added liquid and a liquid accelerating piston for the generation of the next subsequent pulse. At the end of the forward motion stroke, the liquid and accelerating piston are rapidly accelerated into the nozzle by means of a high pressure gas. The high pressure gas can be derived from any usual source such as a compressor, a gas generating propellant, the combustion of a fuel or by the rapid compression of a driving gas through the use of a second piston of considerably greater mass than the liquid accelerating piston. The jet pulses obtained are at a repetition rate up to several pulses per second and can be used to cut and break hard materials such as rock, ceramic and concrete.