Cartridge vane pump with dual side fluid feed and single side inlet
First Claim
1. A vane pump comprising:
- a top section, a bottom section, and a middle section disposed between said top section and said bottom section;
a vane rotor assembly positioned in a bore located in said middle section, said middle section bore having a top opening and a bottom opening;
at least one bypass chamber formed in said middle section;
at least one fluid feed chamber formed in said top section, said fluid feed chamber being partially aligned with said bore to allow fluid to flow into said top opening of said bore, and being partially aligned with said at least one bypass chamber to allow fluid to flow into said at least one bypass chamber;
at least one fluid pocket formed in said bottom section for receiving fluid from said at least one bypass chamber, said fluid pocket being partially aligned with said at least one bypass chamber and being partially aligned with said bottom opening of said bore to allow fluid to flow into said bottom opening of said bore from said at least one bypass chamber;
at least one fluid outlet chamber formed in said bottom section and being at least partially aligned with said bore to allow fluid to flow into said at least one fluid outlet chamber from said bore and out the bottom section;
wherein said at least one fluid feed chamber is positioned to allow fluid to flow into said top opening of said bore and simultaneously into said at least one bypass chamber continuing though to said at least one fluid pocket and said bottom opening of said bore; and
wherein fluid is supplied to said vane rotor assembly through both said top opening and said bottom opening of said bore whereby cavitation is reduced.
4 Assignments
0 Petitions
Accused Products
Abstract
A hydraulic vane pump (10), including a top section (12), a middle section (14), a vane rotor assembly (16) and a bottom section (18) secured together to form a single assembly. The vane pump (10) has a fluid feed chamber (20) to supply fluid directly to the top of a bore (32) formed in the middle section (14). Fluid from the feed chamber (20) also passes through a bypass chamber (28) into a fluid pocket (24) in the bottom section (18) and into the bottom of the bore (32). A vane rotor assembly (16) is used to force fluid from the bore (32) out the outlet chamber (26). By supplying fluid to both the top and bottom of the bore (32) cavitation is reduced. By feeding fluid from a single side of the hydraulic vane pump (10), packaging requirements are minimized.
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Citations
18 Claims
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1. A vane pump comprising:
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a top section, a bottom section, and a middle section disposed between said top section and said bottom section; a vane rotor assembly positioned in a bore located in said middle section, said middle section bore having a top opening and a bottom opening; at least one bypass chamber formed in said middle section; at least one fluid feed chamber formed in said top section, said fluid feed chamber being partially aligned with said bore to allow fluid to flow into said top opening of said bore, and being partially aligned with said at least one bypass chamber to allow fluid to flow into said at least one bypass chamber; at least one fluid pocket formed in said bottom section for receiving fluid from said at least one bypass chamber, said fluid pocket being partially aligned with said at least one bypass chamber and being partially aligned with said bottom opening of said bore to allow fluid to flow into said bottom opening of said bore from said at least one bypass chamber; at least one fluid outlet chamber formed in said bottom section and being at least partially aligned with said bore to allow fluid to flow into said at least one fluid outlet chamber from said bore and out the bottom section; wherein said at least one fluid feed chamber is positioned to allow fluid to flow into said top opening of said bore and simultaneously into said at least one bypass chamber continuing though to said at least one fluid pocket and said bottom opening of said bore; and wherein fluid is supplied to said vane rotor assembly through both said top opening and said bottom opening of said bore whereby cavitation is reduced. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A vane pump comprising:
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a top section, a bottom section, and a middle section disposed between said top section and said bottom section; a vane rotor assembly positioned in a bore located in said middle section, said middle section bore having a top opening and a bottom opening; at least one bypass chamber formed in said middle section; at least one fluid feed chamber formed in said top section, said fluid feed chamber in fluid communication with both said bore and said at least one bypass chamber to allow fluid to flow simultaneously into said top opening of said bore and said at least one bypass chamber; at least one fluid pocket formed in said bottom section and in fluid communication with both said at least one bypass chamber and said bottom opening of said bore to allow fluid to flow into said bottom opening of said bore from said at least one bypass chamber; at least one fluid outlet chamber formed in said top section and being at least partially aligned with said bore to allow fluid to flow into said at least one fluid outlet chamber from said bore and out said top section; wherein said at least one fluid feed chamber is positioned to allow fluid to flow into said top opening of said bore and simultaneously into said at least one bypass chamber continuing though to said at least one fluid pocket and said bottom opening of said bore; and wherein fluid is supplied to said vane rotor assembly through both said top opening and said bottom opening of said bore whereby cavitation is reduced. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification