Title (en)

GASKET JOINT TIGHTENING

Publication

EP 0291215 A3 19900110 (EN)

Application

EP 88303962 A 19880429

Priority

US 4844287 A 19870511

Abstract (en)

[origin: EP0291215A2] An electric drive system applies rotational force to and threadably advances a fastener in a fastener and gasket assembly. A micro processor unit continuously compares the applied torque to a torque control limit value. When the torque control limit is reached the drive system power is reduced. After a preselected time pause the drive system applies at least one retorque pulse. When a predetermined quantity of retorque pulses have been applied, the tensioning operation is terminated.

IPC 1-7

B25B 23/147; B25B 23/151

IPC 8 full level

B25B 23/14 (2006.01); B25B 23/147 (2006.01); B25B 23/151 (2006.01); F16J 15/00 (2006.01)

CPC (source: EP)

B25B 23/147 (2013.01)

Citation (search report)

• [X] DE 3230642 A1 19840223 - VOLKSWAGENWERK AG [DE]
• [A] DE 3212038 A1 19821111 - INT HARVESTER CO [US]
• [A] DE 3010044 A1 19810924 - BAYERISCHE MOTOREN WERKE AG [DE]

Designated contracting state (EPC)

DE FR GB IT SE

DOCDB simple family (publication)

EP 0291215 A2 19881117; EP 0291215 A3 19900110; JP S6420978 A 19890124

DOCDB simple family (application)

EP 88303962 A 19880429; JP 11268888 A 19880511