Spring devices – Vehicle – Mechanical spring and nonresilient retarder
Reexamination Certificate
2003-06-06
2008-09-02
Schwartz, Christopher P (Department: 3683)
Spring devices
Vehicle
Mechanical spring and nonresilient retarder
C267S141000, C213S03200A
Reexamination Certificate
active
07419145
ABSTRACT:
A friction damper comprises a channel member including at least one friction channel and a wedge member including at least one friction wedge received by a corresponding friction channel for sliding motion along the channel relative to the channel member. Each friction channel has a pair of internal sidewalls connected by an internal transverse wall, wherein at least one of the pair of sidewalls forms an obtuse angle with the transverse wall. In a preferred construction, the sidewalls are symmetrically convergent as they approach the connecting transverse wall. Each friction wedge includes a pair of external sidewalls parallel to the internal sidewalls of the channel, wherein the external sidewalls of the friction wedge are movable into surface-to-surface engagement with the internal sidewalls of the friction channel by adjusting the depth of receipt of the friction wedge in the friction channel. The friction damper of the present invention makes it possible to increase the equivalent friction coefficient by a factor of up to ten to twenty times.
REFERENCES:
patent: 1169862 (1916-02-01), Peycke
patent: 1503192 (1924-07-01), Langton
patent: 1637150 (1927-07-01), Haseltine
patent: 1884594 (1932-10-01), Davis
patent: 2534137 (1950-12-01), Lewis
patent: 3796288 (1974-03-01), Hollnagel
patent: 3984125 (1976-10-01), Paton et al.
patent: 4002315 (1977-01-01), Van Goubergen
patent: 4025063 (1977-05-01), Willison
patent: 4093042 (1978-06-01), Pradon
patent: 4177884 (1979-12-01), Vinten
patent: 4262887 (1981-04-01), Jansen
patent: 4358096 (1982-11-01), Paton et al.
patent: 4644714 (1987-02-01), Zayas
patent: 4674725 (1987-06-01), Popper
patent: 4674729 (1987-06-01), Wallace
patent: 4766706 (1988-08-01), Caspe
patent: 4934493 (1990-06-01), Bauer et al.
patent: 5205384 (1993-04-01), Heshmat
patent: 5330165 (1994-07-01), van Goubergen
patent: 5357723 (1994-10-01), Sasaki et al.
patent: 5456047 (1995-10-01), Dorka
patent: 5655632 (1997-08-01), Valembois
patent: 5765322 (1998-06-01), Kubo et al.
patent: 5819484 (1998-10-01), Kar
patent: 5884440 (1999-03-01), Kubo et al.
patent: 6269752 (2001-08-01), Taillon
patent: WO 02/090681 (2002-11-01), None
Lee George C.
Liang Zach
Hodgson & Russ LLP
Schwartz Christopher P
LandOfFree
Friction damper does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Friction damper, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Friction damper will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3972846