GB937206A - Control system for a hydraulically operated percussion device - Google Patents

Control system for a hydraulically operated percussion device

Info

Publication number
GB937206A
GB937206A GB3898459A GB3898459A GB937206A GB 937206 A GB937206 A GB 937206A GB 3898459 A GB3898459 A GB 3898459A GB 3898459 A GB3898459 A GB 3898459A GB 937206 A GB937206 A GB 937206A
Authority
GB
United Kingdom
Prior art keywords
piston
tool
valve
pipe
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
GB3898459A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB937206A publication Critical patent/GB937206A/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
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/18—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency wherein the vibrator is actuated by pressure fluid
    • B06B1/183—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency wherein the vibrator is actuated by pressure fluid operating with reciprocating masses

Landscapes

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

Abstract

937,206. Percussive tools. F. H. FLOTTMANN, [trading as INGENIEURBURO DIPL.-ING. FRIEDRICH HEINRICH FLOTTMANN]. Nov. 17, 1959 [Nov. 17, 1958], No. 38984/59. Class 124. A control for a hydraulically operated percussive tool comprises a control slide valve responsive to hydraulic pressure in the cylinder and effecting initiation of the return stroke only when the hydraulic pressure at the rear of the piston rises momentarily as a result of the impact of the piston on the tool. As shown, a hydraulic piston 5 is acted upon by pressure liquid from an annular space 2 in a control valve to produce an impact on a tool 16, the pressure liquid also acting, through an annular chamber 17a in an auxiliary valve 25 integral with the piston, and a pipe 10, on one end of the piston 6 of a control valve. A spring 9 also acts to urge the piston 6 against a stop 7. As the piston 5 moves towards the tool 16, the pipe 10 is shut off from the space 17a and connected to a vent 18. On the piston 5 striking the tool 16 a momentary rise in pressure in the chamber 4 causes the valve 6 to lift off the stop 7 and allows the full hydraulic pressure to act on the whole of the face 19 of the valve and move it, against the spring 9, to the position shown in Fig. 2. The pressure liquid now acts on both upper and lower faces of the piston 5 but, since the lower face has a greater area than the upper face the piston moves towards its initial position. When the pipe 10 is again in communication with the space 17a pressure liquid again acts on the valve 6 to move it towards the seat 7 and the cycle may be repeated. If the tool 16 is not in position the piston will cover the pipe 13 preventing pressure liquid acting on the lower face of the piston 5 and the tool will come to rest. The exhaust liquid may be used to rotate the tool.
GB3898459A 1958-11-17 1959-11-17 Control system for a hydraulically operated percussion device Expired GB937206A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEI0015643 1958-11-17

Publications (1)

Publication Number Publication Date
GB937206A true GB937206A (en) 1963-09-18

Family

ID=7185815

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3898459A Expired GB937206A (en) 1958-11-17 1959-11-17 Control system for a hydraulically operated percussion device

Country Status (2)

Country Link
CH (1) CH376866A (en)
GB (1) GB937206A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3800664A (en) * 1971-02-10 1974-04-02 Dobson Park Ind Impact tools or apparatus
EP0345484A2 (en) * 1988-06-04 1989-12-13 Netter Gmbh Knocker with self-control

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3800664A (en) * 1971-02-10 1974-04-02 Dobson Park Ind Impact tools or apparatus
EP0345484A2 (en) * 1988-06-04 1989-12-13 Netter Gmbh Knocker with self-control
EP0345484A3 (en) * 1988-06-04 1990-12-05 Netter Gmbh Knocker with self-control

Also Published As

Publication number Publication date
CH376866A (en) 1964-04-15

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