Cutting – Processes
Reexamination Certificate
2005-08-09
2005-08-09
Ashley, Boyer (Department: 3724)
Cutting
Processes
C083S076700, C083S543000, C083S639500, C083S684000, C083SDIG001
Reexamination Certificate
active
06925916
ABSTRACT:
A press for forming a workpiece with a tooling set includes an actuator assembly carrying a movable half or punch of the tooling set and having a two phase operation. In the first phase the actuator provides relatively low force in moving the punch to an intermediate position in close proximity to the workpiece. A sensor detects the position of the punch, and when the punch reaches the intermediate position provides a continue signal. The second phase of actuator operation is conditioned on occurrence of the continue signal, and uses normal high force to press the movable tooling half against the workpiece to complete the operation. The low force first phase allows obstructions of any kind to stop movement of the punch during the first phase before high force applied to the actuator may cause damage or injury to the obstruction. In a preferred embodiment the actuator assembly has hydraulic operation.
REFERENCES:
patent: 1960548 (1934-05-01), Pfeiffer
patent: 2030966 (1936-02-01), Crane et al.
patent: 2494018 (1950-01-01), Urquhart
patent: 2587571 (1952-02-01), Lombard
patent: 2821251 (1958-01-01), Borke
patent: 3186173 (1965-06-01), Hogg
patent: 3786976 (1974-01-01), Murphy, II
patent: 3951025 (1976-04-01), White
patent: 4116122 (1978-09-01), Linder et al.
patent: 4166415 (1979-09-01), Spanke et al.
patent: 4426177 (1984-01-01), Perry
patent: 4466317 (1984-08-01), Ikeda
patent: 4484119 (1984-11-01), Kerr
patent: 4696227 (1987-09-01), Van Buskirk
patent: 4823658 (1989-04-01), Spicer
patent: 4844114 (1989-07-01), Moberg et al.
patent: 4864914 (1989-09-01), LeMoine
patent: 4977804 (1990-12-01), Naito
patent: 4982638 (1991-01-01), Brussel
patent: 5038598 (1991-08-01), Pitzer
patent: 5042336 (1991-08-01), Capps
patent: 5303641 (1994-04-01), Gallandere
patent: 5588344 (1996-12-01), Chun
patent: 5706711 (1998-01-01), Ito
patent: 5931070 (1999-08-01), Miyajima et al.
patent: 5983761 (1999-11-01), Sasaki et al.
patent: 6000311 (1999-12-01), Katoh et al.
patent: 6012370 (2000-01-01), Kobayashi
patent: 6041683 (2000-03-01), Timperi et al.
patent: 6125834 (2000-10-01), Ciccarelli et al.
patent: 6128987 (2000-10-01), Nakagawa et al.
patent: 6279370 (2001-08-01), Awad
patent: 05104298 (1993-04-01), None
Duggins Terrence P.
Hughes Robert L.
Schwarz Edward L.
Ashley Boyer
Hamilton Isaac
PCPS Limited Partnership
Posz Law Group , PLC
LandOfFree
Two stage punch press actuator with output drive shaft... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Two stage punch press actuator with output drive shaft..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Two stage punch press actuator with output drive shaft... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3468629