	US 7,467,516 B2
	Axle driving apparatus
Kenichi Takada, Hyogo (Japan); Ryota Ohashi, Hyogo (Japan); Hironori Sumomozawa, Hyogo (Japan); and Hiroaki Shimizu, Hyogo (Japan)
Assigned to Kanzaki Kokyukoki Mfg. Co., Ltd., Hyogen-ken (Japan)
Filed on Sep. 13, 2006, as Appl. No. 11/519,842.
Application 09/085057 is a division of application No. 08/781513, filed on Jan. 09, 1997, granted, now 5,799,486, filed on Sep. 01, 1998.
Application 11/519842 is a continuation of application No. 11/028627, filed on Jan. 05, 2005, granted, now 7,114,333.
Application 11/028627 is a continuation of application No. 10/623584, filed on Jul. 22, 2003, granted, now 6,860,106, filed on Mar. 01, 2005.
Application 10/623584 is a continuation of application No. 09/923329, filed on Aug. 08, 2001, abandoned.
Application 09/923329 is a continuation of application No. 09/085057, filed on May 27, 1998, granted, now 6,314,730, filed on Nov. 13, 2001.
Claims priority of application No. 8-1391 (JP), filed on Jan. 09, 1996.
Prior Publication US 2007/0006582 A1, Jan. 11, 2007
This patent is subject to a terminal disclaimer.
Int. Cl. F16D 39/00 (2006.01)

U.S. Cl. 60—489

3 Claims

1. An axle driving apparatus comprising:

a common housing;

an axle disposed in the housing;

a fluid sump formed in the housing;

a hydraulic pump disposed in the housing;

a hydraulic motor disposed in the housing;

a center section disposed in the housing, the center section including upper and lower opposite horizontal surfaces;

a pair of arcuate ports opened on the upper horizontal surface onto which the hydraulic pump is fitted;

a pair of fluid passages formed in the center section between the upper and lower horizontal surfaces so as to fluidly connect the respective arcuate ports to the hydraulic motor;

a pair of holes opened on the lower horizontal surface, and connected to the respective fluid passages; and

a pair of check valve casings incorporating respective check valves fitted into the respective holes, wherein each of the check valves is opened to allow only a flow from the fluid sump to the corresponding fluid passage, and wherein the check valve casings are supported by an upward projection formed on a bottom portion of the housing so as to be prevented from escaping from the respective holes.