Expansible chamber devices – Piston with rigid axially extending hollow stem – Relatively movable elongated part within stem
Reexamination Certificate
2007-06-26
2007-06-26
Leslie, Michael (Department: 3745)
Expansible chamber devices
Piston with rigid axially extending hollow stem
Relatively movable elongated part within stem
C092S00500L, C092S052000
Reexamination Certificate
active
11213269
ABSTRACT:
A hydraulic actuator for an active of semi-active vehicle suspension system has a cylinder with a piston therein. A piston rod is attached to the piston and extends out of the cylinder. First and second chambers are formed on opposites sides of the piston enabling the piston to be driven in a manner that counteracts vibrations in the vehicle, A third chamber is provided in the cylinder for connection to a load leveling apparatus. A novel structure reduces the overall length of the hydraulic actuator. A displacement sensor is incorporated into the hydraulic actuator to provide an electrical signal that indicated how far the piston rod extends from the cylinder.
REFERENCES:
patent: 3592108 (1971-07-01), Rosaen et al.
patent: 3701499 (1972-10-01), Schubert et al.
patent: 3779135 (1973-12-01), Sugimura
patent: 4053865 (1977-10-01), Brown, Jr.
patent: 4656457 (1987-04-01), Brausfeld et al.
patent: 4879440 (1989-11-01), Lymburner
patent: 4887699 (1989-12-01), Ivers et al.
patent: 4953089 (1990-08-01), Wolfe
patent: 5044455 (1991-09-01), Tecco et al.
patent: 5255764 (1993-10-01), Kurabayashi et al.
patent: 5348338 (1994-09-01), Kuriki et al.
patent: 5362094 (1994-11-01), Jensen
patent: 5555501 (1996-09-01), Furihata et al.
patent: 5603387 (1997-02-01), Beard et al.
patent: 5642282 (1997-06-01), Sonehara
patent: 5725066 (1998-03-01), Beard et al.
patent: 5899288 (1999-05-01), Schubert et al.
patent: 6249728 (2001-06-01), Streiter
patent: 6321887 (2001-11-01), Kurusu et al.
patent: 6394238 (2002-05-01), Rogala
patent: 6405750 (2002-06-01), Rogala
patent: 6575484 (2003-06-01), Rogala et al.
patent: 6612375 (2003-09-01), Rogala
patent: 6834736 (2004-12-01), Kramer et al.
patent: WO 2004/060702 (2004-07-01), None
patent: WO 2004/080734 (2004-09-01), None
Karolek Michael J.
Schedgick David James
Haas George E.
HUSCO International Inc.
Leslie Michael
Quarles & Brady LLP
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