GB1004692A - Improvements in reciprocating hydraulic motors - Google Patents

Improvements in reciprocating hydraulic motors

Info

Publication number
GB1004692A
GB1004692A GB777461A GB777461A GB1004692A GB 1004692 A GB1004692 A GB 1004692A GB 777461 A GB777461 A GB 777461A GB 777461 A GB777461 A GB 777461A GB 1004692 A GB1004692 A GB 1004692A
Authority
GB
United Kingdom
Prior art keywords
piston
pressure
via passages
inlet
lower face
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB777461A
Inventor
Denis Ernest Lambeth
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dowty Technical Developments Ltd
Original Assignee
Dowty Technical Developments Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dowty Technical Developments Ltd filed Critical Dowty Technical Developments Ltd
Priority to GB777461A priority Critical patent/GB1004692A/en
Publication of GB1004692A publication Critical patent/GB1004692A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/03—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with movement in two directions being obtained by two single-acting piston liquid engines, each acting in one direction
    • F03C1/035—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with movement in two directions being obtained by two single-acting piston liquid engines, each acting in one direction one single-acting piston being always under the influence of the liquid under pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L25/00—Drive, or adjustment during the operation, or distribution or expansion valves by non-mechanical means
    • F01L25/02—Drive, or adjustment during the operation, or distribution or expansion valves by non-mechanical means by fluid means
    • F01L25/04—Drive, or adjustment during the operation, or distribution or expansion valves by non-mechanical means by fluid means by working-fluid of machine or engine, e.g. free-piston machine
    • F01L25/06—Arrangements with main and auxiliary valves, at least one of them being fluid-driven
    • F01L25/066—Arrangements with main and auxiliary valves, at least one of them being fluid-driven piston or piston-rod being used as auxiliary valve

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Hydraulic Motors (AREA)

Abstract

1,004,692. Liquid pressure engines. DOWTY TECHNICAL DEVELOPMENTS Ltd. June 4, 1962 [March 3, 1961], No. 7774/61. Heading F1A. A hydraulic motor, e.g. for actuating a rock drill, comprises pistons 1 and 18 each actuating a valve controlling the reversal of movement of the other. In the embodiment shown, when working piston 1 is in its upper position, pressure liquid passes from an inlet 9 to the lower face of piston 18 via passages 8, 14, 16 and 17. Piston 18 moves upwardly to connect the upper end 4 of piston 1 to pressure via passages 26, 25, 29 and 13. The effective area of the upper end of piston 1 is greater than its lower end so piston 1 is moved downwardly. In the lower position of piston 1 the lower face of piston 18 is connected to exhaust via passages 17, 15, 11 and 12. Since the upper face of piston 18 is of smaller area than its lower face and is continuously connected to pressure via passage 26 and grooves 27, piston 18 is moved downwardly to connect upper end 4 of piston 1 to exhaust via passages 13, 29, 23, 24, 11 and 12. A spring-loaded piston 31, open to inlet 9, acts to reduce inlet pressure fluctuations. Portion 33 is provided on piston 1 to increase its mass.
GB777461A 1961-03-03 1961-03-03 Improvements in reciprocating hydraulic motors Expired GB1004692A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB777461A GB1004692A (en) 1961-03-03 1961-03-03 Improvements in reciprocating hydraulic motors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB777461A GB1004692A (en) 1961-03-03 1961-03-03 Improvements in reciprocating hydraulic motors

Publications (1)

Publication Number Publication Date
GB1004692A true GB1004692A (en) 1965-09-15

Family

ID=9839457

Family Applications (1)

Application Number Title Priority Date Filing Date
GB777461A Expired GB1004692A (en) 1961-03-03 1961-03-03 Improvements in reciprocating hydraulic motors

Country Status (1)

Country Link
GB (1) GB1004692A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2433660A1 (en) * 1978-07-29 1980-03-14 Kawasaki Heavy Ind Ltd HYDRAULIC CYLINDER, WITH INCREASED LOAD AT THE END OF STROKE

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2433660A1 (en) * 1978-07-29 1980-03-14 Kawasaki Heavy Ind Ltd HYDRAULIC CYLINDER, WITH INCREASED LOAD AT THE END OF STROKE

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