GB1511681A - Hydraulic ram mechanism - Google Patents

Hydraulic ram mechanism

Info

Publication number
GB1511681A
GB1511681A GB1861175A GB1861175A GB1511681A GB 1511681 A GB1511681 A GB 1511681A GB 1861175 A GB1861175 A GB 1861175A GB 1861175 A GB1861175 A GB 1861175A GB 1511681 A GB1511681 A GB 1511681A
Authority
GB
United Kingdom
Prior art keywords
valve
ram
lines
pump
changeover
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
GB1861175A
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.)
BRITISH LELY Ltd
Original Assignee
BRITISH LELY 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 BRITISH LELY Ltd filed Critical BRITISH LELY Ltd
Priority to GB1861175A priority Critical patent/GB1511681A/en
Publication of GB1511681A publication Critical patent/GB1511681A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D85/00—Arrangements for making or setting stacks
    • A01D85/005—Forming groups of bales, e.g. bale sledges
    • 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
    • F01L25/063—Arrangements with main and auxiliary valves, at least one of them being fluid-driven the auxiliary valve being actuated by the working motor-piston or piston-rod
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • F15B11/15—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor with special provision for automatic return

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

1511681 Hydraulic reciprocating motors BRITISH LELY Ltd 23 May 1975 [3 May 1975] 18611/75 Heading F1A An hydraulic ram mechanism comprises a doubleacting ram 1, a reversing valve 5 for directing the output of a pump 7 alternately to lines 3, 4 connected, respectively, to the lower and upper ram chambers, and a pressure relief valve 14 arranged to open when the pump delivery pressure rises at the end of the ram's downward stroke and thereby direct the output of the pump 7 through lines 13, 16 to a piston and cylinder actuator 17, the operation of the latter causing changeover of the valve 5. Reciprocation is initiated by withdrawing a catch 18 so that a spring 22 moves the valve 5 from its neutral position to its downward position. The resulting downward stroke of the ram 1 allows a spring 23 to changeover a valve 11 and thereby disconnect the pump delivery lines 6, 13, 15 from a tank 9. After subsequent changeover of the valve 5 as previously described, the ram 1 performs an upward stroke until a piston-rod 1 A thereof returns the valve 11 and thus connects the lines 15, 16 downstream of the relief valve 14 to the tank 9. This de-actuates the actuator 17 whereby the valve 5 changes over and the cycle is repeated. Reengagement of the catch 18 causes the ram 1 to stop in its upper position. A manually operable cam 20 is arranged to co-operate with the valve 11 to enable the ram 1 to be stopped elsewhere in its cycle.
GB1861175A 1975-05-23 1975-05-23 Hydraulic ram mechanism Expired GB1511681A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1861175A GB1511681A (en) 1975-05-23 1975-05-23 Hydraulic ram mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1861175A GB1511681A (en) 1975-05-23 1975-05-23 Hydraulic ram mechanism

Publications (1)

Publication Number Publication Date
GB1511681A true GB1511681A (en) 1978-05-24

Family

ID=10115425

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1861175A Expired GB1511681A (en) 1975-05-23 1975-05-23 Hydraulic ram mechanism

Country Status (1)

Country Link
GB (1) GB1511681A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998012406A1 (en) * 1996-09-20 1998-03-26 Trearc Ltd. Fluid actuators
CN117948310A (en) * 2024-03-25 2024-04-30 四平市顺邦农机制造有限公司 Hydraulic system, hydraulic method and switching method of straw feed bundling machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998012406A1 (en) * 1996-09-20 1998-03-26 Trearc Ltd. Fluid actuators
AU718315B2 (en) * 1996-09-20 2000-04-13 Trearc Ltd Fluid actuators
CN117948310A (en) * 2024-03-25 2024-04-30 四平市顺邦农机制造有限公司 Hydraulic system, hydraulic method and switching method of straw feed bundling machine
CN117948310B (en) * 2024-03-25 2024-05-31 四平市顺邦农机制造有限公司 Hydraulic system, hydraulic method and switching method of straw feed bundling machine

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Legal Events

Date Code Title Description
PS Patent sealed