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Title: US4057961: Pulse-jet water propulsor
[ Derwent Title ]

Country: US United States of America

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8 pages

Inventor: Payne, Peter R.; Annapolis, MD 21401

Assignee: None

Published / Filed: 1977-11-15 / 1975-05-22

Application Number: US1975000580096

IPC Code: Advanced: B63H 11/12; F01K 15/04; F01K 27/00; F02G 1/043;
IPC-7: B63H 11/06;

ECLA Code: B63H11/12; F01K15/04; F01K27/00; F02G1/043F; R02G254/30;

U.S. Class: Current: 060/221; 060/595; 060/596; 092/134; 417/010; 417/380; 417/401; 440/038;
Original: 060/221; 092/134; 417/010; 417/380; 417/401; 060/595; 060/596; 115/011; 115/014;

Field of Search: 417/364,380,401,10 060/595,596,221 092/134 115/011,14

Priority Number:
1975-05-22  US1975000580096
1973-05-08  US1973000358232

Abstract:     A new heat engine in which liquid moves in a tube, one end of which is closed. The tube is heated at the closed end, and the liquid oscillates along the length of the tube. When the liquid interface enters the hot section, some of the interface vaporizes, so that the pressure in the space between the interface and the end of the tube increases, and the interface is forced back into the cooler section of the tube. The vapor then condenses, the pressure falls, and the liquid moves back toward the hot end.

Attorney, Agent or Firm: Sughrue, Rothwell, Mion, Zinn and Macpeak ;

Primary / Asst. Examiners: Ostrager, Allen M.;

INPADOC Legal Status: None          Buy Now: Family Legal Status Report

Related Applications:
Application Number Filed Patent Pub. Date  Title
US1973000358232 1973-05-08    1975-08-12  Heat engine in the form of a water pulse-jet

Parent Case:

    This application is a continuation-in-part of application Ser. No. 358,232 filed on May 8, 1973 now U.S. Pat. No. 3,898,800.

Family: Show 13 known family members

Claim What is claimed is:     1. A water pulse-jet engine comprising:
  • a. a tubular member, said tubular member being closed at one end and open at the other end to a source of water such that the water has access to said tubular member;
  • b. said open end having a bifurcated duct with inlet and outlet ports and valve means associated with each of said ports;
  • c. a piston disposed in said tubular member to urge said water out of said outlet port during movement in one direction in said tubular member and permitting water to flow into said tubular member during movement in the opposite direction, said valve means being coordinated with the movement of said piston by internal pressure variations in said bifurcated duct;
  • d. means for oscillating said piston in said tubular member thereby producing useful power by the movement of water through said outlet port, comprising a source of compressed air disposed at the closed end of said tubular member;
  • e. a vacuum system for initially starting the engine by evacuating the space between said piston and said closed end, comprising a vacuum valve, a conduit coupling said vacuum valve to said tubular member and a vacuum pump coupled to said vacuum valve;
  • f. valve means disposed at said closed end to selectively gate the compressed air into and out of the tubular member; and
  • g. a liquid level sensor positioned in said tubular member, said liquid level sensor controlling the operation of said vacuum system in response to increased liquid level in said tubular member.

Background / Summary: Show background / summary

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Description: Show description

Forward References: Show 12 U.S. patent(s) that reference this one

U.S. References: Go to Result Set: All U.S. references   |  Forward references (12)   |   Backward references (5)   |   Citation Link

Patent  Pub.Date  Inventor Assignee   Title
Get PDF - 7pp US550163* 1895-11 Durand    
Get PDF - 10pp US2795927  1957-06 Huber   Starters for free piston engines, more particularly for free piston prime movers
Get PDF - 10pp US3170406* 1965-02 Robertson    
Get PDF - 5pp US3214085  1965-10 Boldt   Air-cushioned free piston type compressor
Get PDF - 4pp US3631760  1972-01 Moran  The United States of America as represented by the Secretary of the Navy PNEUMATIC TORPEDO LAUNCHER WITH HYDRAULIC OPERATED SNUBBER
  * some details unavailable
Foreign References: None

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