US 7,546,723 B2
Mower drive wheel biasing member being a non-metal biasing member
Mark J. Melone, Rome, N.Y. (US); James F. Marshall, Munnsville, N.Y. (US); and Robert S. Lauren, Durhamville, N.Y. (US)
Assigned to Briggs and Stratton Corporation, Wauwatosa, Wis. (US)
Filed on Dec. 26, 2006, as Appl. No. 11/645,783.
Application 11/645783 is a continuation of application No. 11/062901, filed on Feb. 22, 2005, granted, now 7,152,389.
Application 11/062901 is a continuation of application No. 10/285350, filed on Oct. 31, 2002, granted, now 6,857,254.
Application 10/285350 is a continuation in part of application No. 09/879800, filed on Jun. 12, 2001, granted, now 6,510,678.
Application 09/879800 is a continuation of application No. 09/384534, filed on Aug. 27, 1999, granted, now 6,244,025.
Application 09/384534 is a continuation in part of application No. 09/359537, filed on Jul. 22, 1999, granted, now 6,460,318.
Application 09/359537 is a continuation in part of application No. 09/144499, filed on Aug. 31, 1998, granted, now 5,946,893.
Application 09/144499 is a continuation in part of application No. 09/119818, filed on Jul. 21, 1998, granted, now 6,170,242.
Application 09/119818 is a continuation in part of application No. 08/898801, filed on Jul. 23, 1997, granted, now 6,062,333.
Claims priority of provisional application 60/063362, filed on Oct. 28, 1997.
Claims priority of provisional application 60/053403, filed on Jul. 22, 1997.
Claims priority of provisional application 60/022865, filed on Jul. 26, 1996.
Prior Publication US 2007/0180805 A1, Aug. 09, 2007
Int. Cl. A01D 34/63 (2006.01); A01D 34/64 (2006.01)
U.S. Cl. 56—15.8 12 Claims
OG exemplary drawing
 
1. A mower, comprising:
a chassis having a front portion and a rear portion;
a prime mover mounted on the chassis;
a cutter deck supported by the chassis;
front wheels attached to the front portion of the chassis;
two drive wheel assemblies on different sides of the rear portion of the chassis, each drive wheel assembly connected to the chassis by at least one link pivotable with respect to the chassis;
at least one biasing member associated with the drive wheel assemblies and positioned to bias the drive wheel assemblies in a downward direction, the biasing member being constructed of a non-metal material;
wherein the drive wheels and front wheels support the chassis for movement over a surface;
each drive wheel assembly comprising a drive wheel powered for rotation by the prime mover; and
wherein each drive wheel assembly moves up and down relative to the chassis, respectively against and with force exerted by the at least one biasing member, independently of movement of the other drive wheel assembly.