GB1015380A - A device for use in percussion mechanisms - Google Patents

A device for use in percussion mechanisms

Info

Publication number
GB1015380A
GB1015380A GB32901/64A GB3290164A GB1015380A GB 1015380 A GB1015380 A GB 1015380A GB 32901/64 A GB32901/64 A GB 32901/64A GB 3290164 A GB3290164 A GB 3290164A GB 1015380 A GB1015380 A GB 1015380A
Authority
GB
United Kingdom
Prior art keywords
piston
liquid
port
chamber
working
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
GB32901/64A
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 GB1015380A publication Critical patent/GB1015380A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D11/00—Portable percussive tools with electromotor or other motor drive
    • B25D11/06—Means for driving the impulse member
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/24—Damping the reaction force
    • B25D17/245—Damping the reaction force using a fluid

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)

Abstract

1,015,380. Percussive drills. K. E. A. JOELSON. Aug. 12, 1964 [Aug. 21, 1963], No. 32901/64. Heading B4C. A percussive drill comprises a working piston 8 movable in a cylinder 6 and an elastic damping means 28 to absorb the kinetic energy of the piston at the end of its working stroke if the piston is not stopped by contact with the object to be struck. The damping means is in the form of a light casing member 25 slidable on enlarged portions 26, 26 of the piston 8 so as to define a chamber 28, the member being retained on the piston by means of a split ring 30. In operation, the working piston is moved downwardly by means of a column of liquid trapped between a drive piston 4 and the working piston, the drive piston being moved downwardly by means of an eccentric 2 rotated via an hydraulic motor 2a; the motor is driven, via liquid fed from a tank 11, by a pump 14, the pump also feeding liquid via pipes 21, 22, the interior of a housing 1 and a check valve 5, into the space between the pistons. Liquid is also fed via a port 29 in the piston 8 into the chamber 28 so that if the piston for some reason does not strike the end of the tool 24 and overruns, the member 25 strikes a shoulder 31 on the housing 1 and such impact is cushioned as the liquid in the chamber 28 is forced through port 29 into a channel 19 via a port 9; the area of the port 29 may be adjustable. The drive piston is returned by means of a spring 7 and the piston 8 by means of suction drawn through a pipe 16, connected, via a valve 17, with the low-pressure side of an ejector 18 in the liquid feed pipe 21, 22.
GB32901/64A 1963-08-21 1964-08-12 A device for use in percussion mechanisms Expired GB1015380A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE914663 1963-08-21

Publications (1)

Publication Number Publication Date
GB1015380A true GB1015380A (en) 1965-12-31

Family

ID=20275949

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32901/64A Expired GB1015380A (en) 1963-08-21 1964-08-12 A device for use in percussion mechanisms

Country Status (5)

Country Link
US (1) US3250335A (en)
AT (1) AT262177B (en)
BE (1) BE652171A (en)
GB (1) GB1015380A (en)
NL (1) NL6409565A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111648431A (en) * 2020-05-29 2020-09-11 中国一冶集团有限公司 Crushing pickaxe

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3439755A (en) * 1965-02-11 1969-04-22 Inst Gornogo Dela Imeni Skochi Power percussion tool
US3791149A (en) * 1972-07-11 1974-02-12 Gardner Denver Co Rotary eccentric fluid motor
US3948051A (en) * 1974-08-01 1976-04-06 Marshall Don J Fluid pressure amplifier
US4187917A (en) * 1977-11-30 1980-02-12 Hydroacoustics, Inc. Pile driver
US4166507A (en) * 1978-03-06 1979-09-04 Hydroacoustics, Inc. Percussive drilling apparatus
US4248045A (en) * 1978-04-04 1981-02-03 Turner David L Means for selectively transmitting drive
DE4028304A1 (en) * 1990-09-06 1992-03-12 Krupp Maschinentechnik HYDRAULICALLY OPERATED IMPACT DRILLING DEVICE, ESPECIALLY FOR ANCHOR HOLE DRILLING

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1572019A (en) * 1917-12-28 1926-02-09 Ryan Car Company Fluid-pressure hammer
US2024684A (en) * 1934-07-23 1935-12-17 Erfass Karl Axel Ragnar Motor-driven hammer
FR1083751A (en) * 1953-08-24 1955-01-12 Renault Improvements to vehicle suspension systems

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111648431A (en) * 2020-05-29 2020-09-11 中国一冶集团有限公司 Crushing pickaxe

Also Published As

Publication number Publication date
AT262177B (en) 1968-06-10
NL6409565A (en) 1965-02-22
BE652171A (en)
US3250335A (en) 1966-05-10

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