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GB1124526A - Improvements in or relating to percussive tools and machines - Google Patents

Improvements in or relating to percussive tools and machines

Info

Publication number
GB1124526A
GB1124526A GB2229666A GB2229666A GB1124526A GB 1124526 A GB1124526 A GB 1124526A GB 2229666 A GB2229666 A GB 2229666A GB 2229666 A GB2229666 A GB 2229666A GB 1124526 A GB1124526 A GB 1124526A
Authority
GB
United Kingdom
Prior art keywords
chamber
piston
spring
pressure
liquid
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
GB2229666A
Inventor
David Richard James
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.)
Sonomotive Engineers Ltd
Original Assignee
Sonomotive Engineers 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 Sonomotive Engineers Ltd filed Critical Sonomotive Engineers Ltd
Priority to GB2229666A priority Critical patent/GB1124526A/en
Publication of GB1124526A publication Critical patent/GB1124526A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/14—Control devices for the reciprocating piston
    • B25D9/145—Control devices for the reciprocating piston for hydraulically actuated hammers having an accumulator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/06—Means for driving the impulse member
    • B25D9/12—Means for driving the impulse member comprising a built-in liquid motor, i.e. the tool being driven by hydraulic pressure

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)

Abstract

1,124,526. Percussive tools. SONOMOTIVE ENGS. Ltd. 5 July, 1967 [19 May, 1966], No. 22296/66. Heading B4C. A percussive tool such as a road breaker, comprises a striker piston 2 reciprocable in a pressure chamber 4 which, in use, is connected to a source 9 of fluid-pressure pulses, the piston being formed with a step 7 to provide a differential area on which the fluid pressure acts in the opposite sense to the power stroke, and a return spring 11 which provides the power strokes. The spring 11 may be, as shown in Fig. 1, a mechanical spring located in a chamber or, as shown in Fig. 3, a fluid-pressure spring. In the latter case, compressed air is fed into a chamber 5 to load a diaphragm 35 instead of the diaphragm housing 32 being located on top of the tool, it may be positioned on the side (Fig. 5). A chamber 36 is provided which is filled with liquid in order to transmit the force of the spring to the piston on the working stroke. The liquid in the chamber 36 is supplied from the pressure chamber 4 via a valve more fully disclosed in Specification 1,124,529. In order to prevent the piston striking the casing during idle running a portion of the liquid is trapped in a chamber 44 to cushion the piston, this arrangement is more fully disclosed in Specification 1,124,528.
GB2229666A 1966-05-19 1966-05-19 Improvements in or relating to percussive tools and machines Expired GB1124526A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2229666A GB1124526A (en) 1966-05-19 1966-05-19 Improvements in or relating to percussive tools and machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2229666A GB1124526A (en) 1966-05-19 1966-05-19 Improvements in or relating to percussive tools and machines

Publications (1)

Publication Number Publication Date
GB1124526A true GB1124526A (en) 1968-08-21

Family

ID=10177084

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2229666A Expired GB1124526A (en) 1966-05-19 1966-05-19 Improvements in or relating to percussive tools and machines

Country Status (1)

Country Link
GB (1) GB1124526A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998031509A1 (en) * 1997-01-20 1998-07-23 Francesco Verardi Fluid operated hammer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998031509A1 (en) * 1997-01-20 1998-07-23 Francesco Verardi Fluid operated hammer

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