GB1180771A - Improved power-operated impact wrench or screwdriver. - Google Patents

Improved power-operated impact wrench or screwdriver.

Info

Publication number
GB1180771A
GB1180771A GB3364867A GB3364867A GB1180771A GB 1180771 A GB1180771 A GB 1180771A GB 3364867 A GB3364867 A GB 3364867A GB 3364867 A GB3364867 A GB 3364867A GB 1180771 A GB1180771 A GB 1180771A
Authority
GB
United Kingdom
Prior art keywords
hammer
cylinder
splines
anvil
inertia
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
GB3364867A
Inventor
Ronald Frederick States
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.)
Air Compressors and Tools Ltd
Original Assignee
Desoutter Brothers 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 Desoutter Brothers Ltd filed Critical Desoutter Brothers Ltd
Priority to GB3364867A priority Critical patent/GB1180771A/en
Publication of GB1180771A publication Critical patent/GB1180771A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/14Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
    • B25B23/145Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for fluid operated wrenches or screwdrivers
    • B25B23/1453Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for fluid operated wrenches or screwdrivers for impact wrenches or screwdrivers

Abstract

1,180,771. Screwing-up and unscrewing nuts, &C. DESOUTTER BROS. Ltd. 28 June, 1968 [21 July, 1967], No. 33648/67. Heading B3N. In a power-operated impact wrench or screwdriver including automatic means for causing cyclic engagement and disengagement of a rotary hammer 67 and anvil 65 an inertia cylinder 66 is coupled to the hammer 67 by a torsionally resilient cylinder 75 which constrains the inertia cylinder from moving relative to the hammer 67 until the impact torque delivered to the anvil 65 reaches a predetermined value whereupon the inertia cylinder 66 moves in relation to the hammer and so acts on the automatic means as to increase the amount of disengagement of the hammer from the anvil and thereby operate control means for interrupting the supply of power to the tool. The hammer 67 comprises inner and outer parts 68, 69 rigidly connected by balls 70 and splines 71. A spring 73 and balls 72 which are disposed in inclined grooves in the inner hammer part 69 and in a drive spindle 11 engage and disengage the hammer 67 and anvil 65 as the spindle 11 is driven by a vane type air motor 6 through planetary gearing 10. The inertia cylinder 66 is connected with provision for limited relative rotation to the outer hammer part 68 by loose splines 74, and has splines 78 engaging helical splines 77 on the resilient cylinder 75. The resilient cylinder 75 is integral with the inner hammer part 69 and has longitudinal slits cut therein. An adjusting worm 80 accessible through an opening in the tool casing engages the helical splines 77 and rotates a sleeve 79 in threaded engagement with the inertia cylinder 66 to displace the splines 78 along the helical splines 77 and thereby twist the cylinder 75 to variably preload the splines 74. In operation the splines 74 remain in engagement so that the inertia cylinder 66 and hammer 67 move in unison until the resistance to movement of the anvil 65 under the impact of the hammer reaches a predetermined value whereupon the cylinder 66 continues to move when the hammer strikes the anvil and further twists the resilient cylinder 75. Rebound of the inertia cylinder 66 transmits the energy stored in the resilient cylinder 75 to the hammer 67 through the splines 74 to increase the disengagement of the hammer from the anvil 65 so that the end of the resilient cylinder 75 displaces a ring 18 connected by a transverse rod 16 and spring-loaded head member 15 to a rod 13 which unseats a ball-valve 20 to pressurize a piston valve 25 for cutting off the air supply to the motor 6. The piston valve 25 is retained in the closed position by air supplied through a bore 31 until the air supply to the tool is cut-off by release of a press-button control valve 34. A reversing valve 44 provides for operation of the motor 6 in either direction but automatic torque control is effective only when the tool is used for screwing-up.
GB3364867A 1967-07-21 1967-07-21 Improved power-operated impact wrench or screwdriver. Expired GB1180771A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3364867A GB1180771A (en) 1967-07-21 1967-07-21 Improved power-operated impact wrench or screwdriver.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB3364867A GB1180771A (en) 1967-07-21 1967-07-21 Improved power-operated impact wrench or screwdriver.
US3515225D US3515225A (en) 1967-07-21 1968-07-08 Rotary impact tool having torque responsive disengagement and power control
DE19681703846 DE1703846B2 (en) 1967-07-21 1968-07-18 Motor shut-off device on an impact wrench
FR1575045D FR1575045A (en) 1967-07-21 1968-07-22

Publications (1)

Publication Number Publication Date
GB1180771A true GB1180771A (en) 1970-02-11

Family

ID=10355637

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3364867A Expired GB1180771A (en) 1967-07-21 1967-07-21 Improved power-operated impact wrench or screwdriver.

Country Status (4)

Country Link
US (1) US3515225A (en)
DE (1) DE1703846B2 (en)
FR (1) FR1575045A (en)
GB (1) GB1180771A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2128916A (en) * 1982-10-19 1984-05-10 Black & Decker Inc Impact mechanism for power driven wrench

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1226978A (en) * 1968-11-29 1971-03-31
GB1282300A (en) * 1969-12-08 1972-07-19 Desoutter Brothers Ltd Improved impact wrench or screwdriver
US3989113A (en) * 1975-08-25 1976-11-02 Chicago Pneumatic Tool Company Pneumatic tool having a reverse air control valve with an integral regulator
US4016940A (en) * 1975-10-21 1977-04-12 Chicago Pneumatic Tool Company Pneumatic nut runner having a directional valve and an air regulator
US4576270A (en) * 1983-02-28 1986-03-18 The Aro Corporation Torque control and fluid shutoff mechanism for a fluid operated tool
US6105595A (en) * 1997-03-07 2000-08-22 Cooper Technologies Co. Method, system, and apparatus for automatically preventing or allowing flow of a fluid
US5890848A (en) * 1997-08-05 1999-04-06 Cooper Technologies Company Method and apparatus for simultaneously lubricating a cutting point of a tool and controlling the application rate of the tool to a work piece
EP2140978B1 (en) * 2008-07-01 2012-11-28 Metabowerke GmbH Impact wrench
US9339925B2 (en) * 2010-07-01 2016-05-17 Stanley Fastening Systems, L.P. Fastener driving device with dust blower
CN108428518B (en) * 2018-04-09 2020-02-11 合肥和旭继电科技有限公司 Device for stranding relay wires

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2814277A (en) * 1955-12-27 1957-11-26 Ingersoll Rand Co Shut-down mechanism for pneumatic tools
US3318390A (en) * 1964-10-28 1967-05-09 Reed Roller Bit Co Mechanism for controlling tension in fasteners

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2128916A (en) * 1982-10-19 1984-05-10 Black & Decker Inc Impact mechanism for power driven wrench

Also Published As

Publication number Publication date
DE1703846B2 (en) 1973-02-01
US3515225A (en) 1970-06-02
DE1703846A1 (en) 1971-02-25
FR1575045A (en) 1969-07-18

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