A motor capacity change-over actuator 10 varies a capacity of a hydraulic motor 1 in accordance with the inflow/outflow of a working fluid into/out of a drive pressure chamber 72. A motor capacity change-over valve 20 supplies the working fluid to the drive pressure chamber 72 in a supply position H and discharges the working …

Legal parties

Inventors (applicants): Satoshi Mori
Assignees (initial): Kayaba Industry Co., Ltd. (Tokyo, JP)
Agents: Rabin & Berdo, P.C. (attorney)

The application was examined by Michael Leslie (USPTO dept. 3745)


  • 1. A hydraulic motor driving device that varies a capacity of a hydraulic motor using …
  • 2. The hydraulic motor driving device as defined in claim 1 , wherein the flow …
  • 3. The hydraulic motor driving device as defined in claim 2 , wherein the flow …

International priority data

JP: 2009-240330 / Oct. 19, 2009 (national)

Cited documents


  • Matsura US 6151895 A / 92/12.2, Nov. 1, 2000
  • DE 10041435 A1, Aug. 1, 2001
  • JP 1-124404 U, Aug. 1, 1989
  • Stolzer US 6880450 B2 / 91/506, Apr. 1, 2005
  • JP 7-054757 A, Feb. 1, 1995
  • Ju US 6925799 B2 / 91/506, Aug. 1, 2005
  • JP 08-219004 A, Aug. 1, 1996
  • Tsurumi et al. US 5649468 A / 91/506, Jul. 1, 1997
  • Arai et al. US 5826488 A / 91/506, Oct. 1, 1998
  • JP 52-98041 U, Jul. 1, 1977

Brief Description of the Drawings

FIG. 1 is a hydraulic circuit diagram of a hydraulic motor driving device according to this invention. FIG. 2 is a longitudinal sectional view of a hydraulic motor …


Field of the Invention

This invention relates to a driving device for a hydraulic motor, which comprises a motor capacity change-over …

Description of the Preferred Embodiments

Referring to FIG. 1 of the drawings, a swash plate type variable capacity hydraulic motor 1 installed in a hydraulic shovel as a travel power source is operated by an oil pressure …

Industrial Field of Application

As described above, this invention brings about favorable effects in terms of alleviating a shock occurring during deceleration of a hydraulic motor used to generate travel power in a construction …

More details about Hydraulic Motor Driving Device

Miscellaneous patent data

The grant publication number is 08776666, the patent grant was extended by 463 days, the inventor's name is Satoshi Mori, the claim 1 is exemplary as chosen by the examiner, the invention description is illustrated by 8 drawings, the assignee location is Tokyo (JP); its organization is Kayaba Industry Co., Ltd., the application was examined by Michael Leslie (3745 USPTO department), the assignee is a foreign company or corporation, the recorded agent's company is Rabin & Berdo, P.C., the patent was granted on Jul. 15, 2014, the exemplary patent drawings are Longitudinal sectional view of essential, Hydraulic circuit diagram of a hydraulic, Longitudinal sectional view of a hydraulic, Hydraulic Motor Driving Device, the application number is 13/255,493 (U.S.), the invention details are shown in 10 figures, developed by Satoshi Mori, the application was published on Oct. 7, 2010, the known applicant's name is Mori Satoshi, the invention is named Hydraulic Motor Driving Device, categorized under By varying reaction plate inclination relative to cylinder axes as a primary classification, similar documents are classified under Miscellaneous, Application of Motive Fluid at Different Pressures to Opposed Working Member Faces, Working member or part carried thereby uncovers inlet port, independently operable means to lock distributor, Cylinders or cylinder covers, preventing rotation in wrong direction, acting on same main shaft, cylinders in star or fan arrangement, Speed controlled, using only connecting-rods for conversion of reciprocatory into rotary motion or vice versa, particularly claims a hydraulic motor driving device that varies a capacity of a hydraulic motor…, claims 1-7 comprise the invention scope.

Invention classification information

The invention is classified under Distribution members specially adapted for multiple-cylinder engines, Control of working-fluid admission or discharge peculiar thereto, Control specially adapted therefor, By varying reaction plate inclination relative to cylinder axes. The designated search classifications include By varying reaction plate inclination relative to cylinder axes, Stroke control, Motor operated.

Patent details
Publication number 08776666
Publication date Jul. 15, 2014
Kind code B2
Application number 13/255,493
Application date Oct. 7, 2010
Application type U
Application series code 13
Int. pub. country WO
Int. pub. number WO2011/048958
Int. publication Apr. 28, 2011
Int. filing country WO
Int. filing PCT/JP2010/067654
Filed internationally Oct. 7, 2010
National stage date Sep. 8, 2011
Extension term 463
National classification 91/505
Total number of claims 7
Exemplary claims 1
Number of drawings 8
Number of figures 10
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