Title:
ELECTROMAGNETIC IMPACT DEVICE
Document Type and Number:
Japanese Patent JPS532769
Kind Code:
A
Abstract:
An electromagnetic hammer has a coil coacting with an axially reciprocable armature including a ferromagnetic core traversed by an elongate nonmagnetic ram which carries at one end a spring-loaded piston head forming part of a pneumatic damping device, its other end co-operating with a working tool. The coil is intermittently energizable by a control system including a capacitor chargeable from an electric power supply by way of a first thyristor and dischargeable through the coil by way of a second thyristor, the two thyristors being sequentially triggered in response to a control pulse applied to a transformer with two secondaries generating staggered firing pulses with the aid of a delay network in the output circuit of one of these secondaries.
More Like This:
| WO/2022/074394 | IMPACTOR |
| WO/2020/135184 | ELECTRIC TOOL |
| WO/2009/015924 | HAND-HELD POWER TOOL COMPRISING A SPRING UNIT |
Inventors:
JIYORUJIYU JIYATSUKUMAN
Application Number:
JP7623877A
Publication Date:
January 11, 1978
Filing Date:
June 28, 1977
Export Citation:
Assignee:
JACQUEMET GEORGES
International Classes:
B25D11/06; B25D13/00; E21B1/22; H01F7/06; H01F7/08; H02K33/04; (IPC1-7): B25D13/00; H02K33/00
Next Patent: JPH0532770