Global Patent Index - EP 1238757 A2

EP 1238757 A2 2002-09-11 - Pneumatic screwdriver with screwing depth limitation

Title (en)

Pneumatic screwdriver with screwing depth limitation

Title (de)

Pneumatischer Schrauber mit Begrenzung der Einschraubtiefe

Title (fr)

Outil pneumatique de vissage avec limitation de la profondeur de vissage

Publication

EP 1238757 A2 (EN)

Application

EP 02004959 A

Priority

JP 2001060812 A

Abstract (en)

An automatic stop device for a screwdriver stops the rotation of the air motor of the screwdriver if the desired screwing depht is reached. A screw feed device (15) of the screwdriver comprises a pneumatic cylinder (3). In an air passage (41) formed in the pneumatic cylinder, a valve chamber (47) is formed in order to operate an air exhaust valve (35) to communicate the pilot air chamber (23a) with the open air. An air exhaust hole (46) for exhausting compressed air from the air passage (41) is formed in the valve chamber (47). A timer chamber (50) is formed in the upstream of the valve chamber (47) in the air passage (41). A pressure within the valve chamber (47) increases and the air exhaust valve (35) operates upon the pressure increase and the stop valve (22) is actuated to close by discharging the compressed air from the pilot air chamber (23a) of the stop valve (22), when the piston reaches a position near the lower dead point and the compressed air flows from the air passage (41) to the valve chamber (47) via the timer chamber (50) and the air exhaust hole (46) is closed in synchronism with the operation of the contact arm (18). <IMAGE>

IPC 1-7 (main, further and additional classification)

B25B 23/00; B25B 21/02

IPC 8 full level (invention and additional information)

B25B 23/145 (2006.01); B25B 21/02 (2006.01); B25B 23/00 (2006.01); B25B 23/02 (2006.01); B25C 7/00 (2006.01)

CPC (invention and additional information)

B25B 23/0064 (2013.01); B25B 21/023 (2013.01)

Designated contracting state (EPC)

DE FR GB

EPO simple patent family

EP 1238757 A2 20020911; EP 1238757 A3 20050316; EP 1238757 B1 20080723; DE 60227734 D1 20080904; JP 2002264032 A 20020918; JP 4457509 B2 20100428; KR 100558495 B1 20060307; KR 20020071468 A 20020912

INPADOC legal status


2018-04-30 [PGFP DE] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: DE

- Payment date: 20180220

- Year of fee payment: 17

2011-03-31 [PG25 GB] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: GB

- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20100305

2011-01-31 [PG25 FR] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: FR

- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20100331

2010-12-24 [REG FR ST] NOTIFICATION OF LAPSE

- Effective date: 20101130

2010-11-24 [GBPC] GB: EUROPEAN PATENT CEASED THROUGH NON-PAYMENT OF RENEWAL FEE

- Effective date: 20100305

2009-10-30 [PGFP FR] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: FR

- Payment date: 20090324

- Year of fee payment: 8

2009-07-01 [26N] NO OPPOSITION FILED

- Effective date: 20090424

2009-06-30 [PGFP GB] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: GB

- Payment date: 20090304

- Year of fee payment: 8

2008-09-04 [REF] CORRESPONDS TO:

- Document: DE 60227734 P 20080904

2008-07-23 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: B1

- Designated State(s): DE FR GB

2008-07-23 [REG GB FG4D] EUROPEAN PATENT GRANTED

2005-12-07 [AKX] PAYMENT OF DESIGNATION FEES

- Designated State(s): DE FR GB

2005-06-08 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20050412

2005-03-16 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A3

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

2005-03-16 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO:

- Countries: AL LT LV MK RO SI

2005-03-16 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: 7B 25B 23/00 A

2005-03-16 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: 7B 25B 21/02 B

2002-09-11 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A2

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

2002-09-11 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO:

- Free text: AL;LT;LV;MK;RO;SI