GB2018904A - A pneumatic paving breaker control valve assembly - Google Patents

A pneumatic paving breaker control valve assembly

Info

Publication number
GB2018904A
GB2018904A GB7911485A GB7911485A GB2018904A GB 2018904 A GB2018904 A GB 2018904A GB 7911485 A GB7911485 A GB 7911485A GB 7911485 A GB7911485 A GB 7911485A GB 2018904 A GB2018904 A GB 2018904A
Authority
GB
United Kingdom
Prior art keywords
control valve
valve assembly
breaker control
slug
outlet
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.)
Granted
Application number
GB7911485A
Other versions
GB2018904B (en
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.)
Macdonald & Co Ltd John
Original Assignee
Macdonald & Co Ltd John
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 Macdonald & Co Ltd John filed Critical Macdonald & Co Ltd John
Priority to GB7911485A priority Critical patent/GB2018904B/en
Publication of GB2018904A publication Critical patent/GB2018904A/en
Application granted granted Critical
Publication of GB2018904B publication Critical patent/GB2018904B/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
    • B25D9/16—Valve arrangements therefor
    • B25D9/18—Valve arrangements therefor involving a piston-type slide valve

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Road Paving Machines (AREA)

Abstract

The control valve assembly 19 has a reciprocating slug 23 which allows alternate communication between inlet 25 and outlet 26 or between inlet 25 and outlet 27, the flow to outlet 27 being restricted by the radial clearance between slug 23 and bush 20. The slug is displaced by the pressure build up in front of the main piston 3. <IMAGE>
GB7911485A 1978-04-07 1979-04-02 Pneumatic breaker control valve assembly Expired GB2018904B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7911485A GB2018904B (en) 1978-04-07 1979-04-02 Pneumatic breaker control valve assembly

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1365878 1978-04-07
GB7911485A GB2018904B (en) 1978-04-07 1979-04-02 Pneumatic breaker control valve assembly

Publications (2)

Publication Number Publication Date
GB2018904A true GB2018904A (en) 1979-10-24
GB2018904B GB2018904B (en) 1982-08-11

Family

ID=26249906

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7911485A Expired GB2018904B (en) 1978-04-07 1979-04-02 Pneumatic breaker control valve assembly

Country Status (1)

Country Link
GB (1) GB2018904B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5775196A (en) * 1994-02-28 1998-07-07 Atlas Copco Berema Ab Valve arrangement in compressed air driven motors

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5775196A (en) * 1994-02-28 1998-07-07 Atlas Copco Berema Ab Valve arrangement in compressed air driven motors

Also Published As

Publication number Publication date
GB2018904B (en) 1982-08-11

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee