Compensated fluid flow control valve
CA 1270176 C · Owner: Caterpillar Inc. · Inventors: Budzich, Tadeusz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compensated Fluid Flow Control Valve A compensated direction flow control valve arrangement provided with a direction control spool for control of fluid flow to and from a fluid motor which, may be of a cylinder type and is subjected to positive and negative loads. During control of negative load the upstream of the outflow metering orifice positioned at the outlet of the fluid motor is, maintained at a controlled constant pressure level by a pressure reducing valve handling the fluid flow at negative load pressure. The outflow metering orifice is made independent of the direction control spool and its effective flow area is made responsive and varies with the pressure at the inlet of the …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted June 12, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 12, 2007.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.