Method of making valve guide by powder metallurgy process

Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Consolidation of powder prior to sintering

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C075S230000

Reexamination Certificate

active

07897102

ABSTRACT:
A powder metallurgy method for making valve guides for use in internal combustion engines advantageously utilizes uniaxial side pressing to form compacts. Such compacts are subsequently sintered, formed into a cylindrical shape, and then hollowed to form a valve guide. The valve guides exhibit improved uniformity and density and hardness from end to end of the valve guide when contrasted to powder metal valve guides formed with uniaxial end pressing.

REFERENCES:
patent: 3689964 (1972-09-01), Reen
patent: 4050143 (1977-09-01), Aslund
patent: 4976915 (1990-12-01), Kuroki
patent: 5654106 (1997-08-01), Purnell et al.
patent: 6080358 (2000-06-01), Oba et al.
patent: 6221813 (2001-04-01), Riedel et al.
patent: 6599345 (2003-07-01), Wang et al.
patent: 2 012 654 (1979-08-01), None
patent: 05078710 (1993-03-01), None
patent: 10061417 (1998-03-01), None
European Search Report, dated Nov. 25, 2005 issued for European patent application counterpart of above application.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Method of making valve guide by powder metallurgy process does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of making valve guide by powder metallurgy process, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of making valve guide by powder metallurgy process will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2697379

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.