Railroad FROG
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 25, 1989
Grant Date -
N/A
app pub date -
Feb 2, 1987
filing date -
Feb 2, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An improved railroad FROG of nearly shrink free casting and method of forming is disclosed. The FROG is comprised of a triangular shaped top area with an actual FROG point at the center of the casting, widening at one end to a heel and heel extension with flangeways adjacent each side to allow the passage of wheels. A throat is located ahead of the actual FROG point and extends forwardly to a toe end of the casting. The throat is bound by wings of the casting. The casting has a solid arched, ribbed supporting structure below the running surface of the casting.
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