Ram boring machine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 17, 1999
Grant Date -
N/A
app pub date -
Dec 6, 1996
filing date -
Dec 8, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A ram-boring machine with forward and reverse motion control which comprises a percussion piston that can be axially displaced in a tubular housing, a control tube that is arranged in the housing and controls the forward and reverse motion of the percussion piston by passing over radial control openings in the percussion piston, control edges on the control tube which are guided in the percussion piston in sealed fashion, a compressed air bore that runs into the front end of the control tube, a compressed air bore or compressed air line that runs into an annular chamber between a first control edge and a second control edge, an outlet bore or outlet line that originates in the region between the second control edge and a third control edge and leads to the rear end of the control tube, and control means for selectively charging the compressed air bore or compressed air line or ventilating the outlet bore or outlet line.
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