Multi-pressure control system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 16, 1991
Grant Date -
N/A
app pub date -
Aug 22, 1990
filing date -
Aug 22, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A multi-purpose control system for a backup type welding gun and similar apparatuses including a positioning directional control valve for controlling the extension and retraction of the positioning or backup cylinder. A multi-pressure air sequence circuit and a time delay means operatively connected to the air sequence circuit for controlling the admission of a predetermined low pressure into the retract port of a backup type welding gun positioning cylinder to speed up the extension movement of the position piston carrying a weld cylinder, and then to control the admission of a predetermined higher retraction pressure higher retraction into said retract port, after a predetermined time delay interval. A welding pressure four-way directional control valve operatively connects a multi-pressure selector air circuit to the weld cylinder operating port to provide a plurality of pre-set pressures to the weld cylinder operating port for carrying out welding operations at selective pressures and in selected sequences.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully