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Title:
PISTON CARTRIDGE FOR PISTON PUMP
Document Type and Number:
WIPO Patent Application WO/2018/160234
Kind Code:
A3
Abstract:
A hydraulic piston pump (100) includes a piston (128) disposed in a blind housing bore (150) of a piston housing (124) and that reciprocates to generate a pumping action. To accommodate the piston (128), a piston cartridge (170) is installed in each of the housing bores (150). The piston cartridge (170) includes a piston sleeve (172) having an inner sleeve periphery (184), a first outer sleeve periphery (190), and a second outer sleeve periphery (192). The inner sleeve periphery (184) is configured to establish sliding contact with the piston (128). The first outer sleeve periphery (190) has a first outer sleeve diameter (194) that is larger than a second outer sleeve diameter (196) associated with the second outer sleeve periphery (192). To seal against the blind housing bore (150), a liner cap (174) having a cylindrical liner wall (210) and an axial liner cover (212) is disposed over the first outer sleeve periphery (190). The axial liner cover (212) abuts a housing bore ceiling (160) of the blind housing bore (150) and can receive hydraulic fluid there through.

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Inventors:
BEAN, Sunil, J. (8229 Deerwood Court, Woodridge, IL, 60517, US)
BROWN, Cory, A. (2401 W. Carriage Lane, Peoria, IL, 61614, US)
Application Number:
US2017/059895
Publication Date:
November 01, 2018
Filing Date:
November 03, 2017
Export Citation:
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Assignee:
CATERPILLAR INC. (100 N.E. Adams Street, Peoria, IL, 61629-9510, US)
International Classes:
F04B53/16; F04B1/12; F04B9/109; F04B15/08; F04B23/02; F04B53/14
Foreign References:
US4893738A1990-01-16
US20080020136A12008-01-24
US20160281690A12016-09-29
US20150217745A12015-08-06
KR20010082069A2001-08-29
Attorney, Agent or Firm:
CARTER, Janda, M. et al. (Caterpillar Inc, 100 NE Adams Street-AH9510Peoria, IL, 61629-9510, US)
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