GB1293394A - Impact devices - Google Patents

Impact devices

Info

Publication number
GB1293394A
GB1293394A GB54316/69A GB5431669A GB1293394A GB 1293394 A GB1293394 A GB 1293394A GB 54316/69 A GB54316/69 A GB 54316/69A GB 5431669 A GB5431669 A GB 5431669A GB 1293394 A GB1293394 A GB 1293394A
Authority
GB
United Kingdom
Prior art keywords
hammer
spring
drill
stiffness
nov
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
GB54316/69A
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.)
General Dynamics Corp
Original Assignee
General Dynamics Corp
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 General Dynamics Corp filed Critical General Dynamics Corp
Publication of GB1293394A publication Critical patent/GB1293394A/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
    • B25D9/06—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
    • 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
    • B25D17/06—Hammer pistons; Anvils ; Guide-sleeves for pistons
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/10—Connecting leads to windings

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Earth Drilling (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)

Abstract

1293394 Percussive drills GENERAL DYNAMICS CORP 5 Nov 1969 [14 Nov 1968] 54316/69 Heading B4C [Also in Division E1] A vibratory percussive drill has a hammer 18 (Fig. 1) which is reciprocated, e.g. pneumatically, to apply impulses to an anvil connected to a drill bit 48. The anvil includes a relatively resilient member in the form of a shaft 44 of titanium alloy, and a drill steel 34 extending from the shaft 44 to the bit 48, and the stiffness of the spring and the mass of the hammer are chosen to maximize the energy transferred into the material being drilled. The system is arranged so that Q=ecS#Cs>0À7 and preferably >1À5, where e, c and S are respectively the density, sonic velocity and cross-sectional area of the drill steel, #=2# x impact frequency, and Cs is the compliance (the inverse of the stiffness) of the spring. In another embodiment (Fig. 3), the spring is mounted on the tip of the hammer 60 and comprises concentric tubes 62a, 62b joined together.
GB54316/69A 1968-11-14 1969-11-05 Impact devices Expired GB1293394A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US77576268A 1968-11-14 1968-11-14

Publications (1)

Publication Number Publication Date
GB1293394A true GB1293394A (en) 1972-10-18

Family

ID=25105419

Family Applications (2)

Application Number Title Priority Date Filing Date
GB0641/72A Expired GB1293395A (en) 1968-11-14 1969-11-05 Impact devices
GB54316/69A Expired GB1293394A (en) 1968-11-14 1969-11-05 Impact devices

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB0641/72A Expired GB1293395A (en) 1968-11-14 1969-11-05 Impact devices

Country Status (6)

Country Link
US (1) US3570609A (en)
JP (1) JPS5340739B1 (en)
DE (1) DE1957296C3 (en)
FR (1) FR2023299A1 (en)
GB (2) GB1293395A (en)
SE (2) SE390615B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0706604A1 (en) * 1993-07-01 1996-04-17 Reedrill, Inc. Impact hammer

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3640351A (en) * 1970-05-18 1972-02-08 Gardner Denver Co Force pulse shaping member for percussion tool
US4051906A (en) * 1976-03-03 1977-10-04 Trw Canada Limited Extension rods used in percussive drilling
US4187917A (en) * 1977-11-30 1980-02-12 Hydroacoustics, Inc. Pile driver
SE424830B (en) * 1978-01-12 1982-08-16 Goran Alfred Nilsson DEVICE FOR THE EXTENSION OF THE PULSE PULSE PROCEDURE OF THE IMPACT OF ME BATTERY WORKING TOOLS
US4166507A (en) * 1978-03-06 1979-09-04 Hydroacoustics, Inc. Percussive drilling apparatus
SE412778B (en) * 1978-09-05 1980-03-17 Lund Hydromaskin Ab HEJARE, FOR CLOSING PALS AND SIMILAR IN THE MARKET
JPS58500074A (en) * 1981-02-17 1983-01-13 キヤタピラ−　トラツクタ−　カンパニイ Ripper with a different impact device and a slotted shank
US4379595A (en) * 1981-02-17 1983-04-12 Caterpillar Tractor Co. Ripper with offset impacting means and slotted shank
JPS5972023U (en) * 1982-11-08 1984-05-16 クラリオン株式会社 Pop noise removal circuit
JPS6148296A (en) * 1984-08-16 1986-03-08 Mitsubishi Electric Corp Acoustic device
SE504828C2 (en) * 1990-04-11 1997-05-12 Sandvik Ab Hammer device where piston and drill bit have reverse design relative to each other in terms of impedance
SE505422C2 (en) * 1996-05-09 1997-08-25 Sandvik Ab Impedance and length / time parameter range for hammer device and associated drill bit and piston
FI116125B (en) * 2001-07-02 2005-09-30 Sandvik Tamrock Oy Type of device
CA2366030A1 (en) * 2001-12-20 2003-06-20 Global E Bang Inc. Profiling system
US20070121423A1 (en) * 2001-12-20 2007-05-31 Daniel Rioux Head-mounted display apparatus for profiling system
SE528654C2 (en) * 2005-05-23 2007-01-09 Atlas Copco Rock Drills Ab Impulse generator for rock drill, comprises impulse piston housed inside chamber containing compressible liquid

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1559709A (en) * 1925-11-03 Rock drill
US1178143A (en) * 1915-03-22 1916-04-04 Martin E Evans Driving-cap.
US3086600A (en) * 1959-04-30 1963-04-23 Kerley Engineering Inc Mechanical impulse filter type shock mount
US3371726A (en) * 1965-05-24 1968-03-05 Gen Dynamics Corp Acoustic apparatus
US3382932A (en) * 1965-05-24 1968-05-14 Gen Dynamics Corp Acoustic impact drilling apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0706604A1 (en) * 1993-07-01 1996-04-17 Reedrill, Inc. Impact hammer
EP0706604A4 (en) * 1993-07-01 1996-09-11 Reedrill Inc Impact hammer

Also Published As

Publication number Publication date
DE1957296C3 (en) 1979-05-03
JPS5340739B1 (en) 1978-10-28
FR2023299A1 (en) 1970-08-07
SE7407805A (en) 1974-06-13
DE1957296B2 (en) 1978-09-07
US3570609A (en) 1971-03-16
SE390615B (en) 1977-01-03
GB1293395A (en) 1972-10-18
SE397788B (en) 1977-11-21
DE1957296A1 (en) 1970-07-09

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee