US Patent: 2,035,465
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| Hydraulic Pump
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Patentees:
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| Malcolm E. Erskine (exact or similar names) - Racine, Racine County, WI |
| William Reinhardt (exact or similar names) - Racine, Racine County, WI |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
May 21, 1934 |
| Granted: |
Mar. 31, 1936 |
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Patent Pictures:
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Joel Havens
"Vintage Machinery" entry for Racine Tool & Machine Co.
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Description: |
| Abstract:
The invention relates to hydraulic pumps and more particularly to that type of rotary hydraulic pump wherein a rotor revolves around a stationary valve shaft provided with inlet and outlet ports that communicate during the cycle of operations with passages in the rotor which communicate with a plurality of pumping compartments formed between the body of the rotor, vanes In the rotor and a casing. One of the objects of the invention is to provide a pump of the type above described in which the pressures acting on the rotor are prevented from shifting the rotor relative to the valve and in which any chance of shearing the bolts securing the end plates to the rotor body is prevented. A further object of the invention is to prevent the pressure on the valve shaft shifting said shaft endwise and exerting an end thrust upon parts of the rotor.
Claim:
In a pump of the character described, the combination with a supporting frame, a valve shaft having a cylindrical valve portion provided with inlet and outlet ports and end portions of smaller diameter than said valve portion provided with inlet and outlet passages respectively communicating with said inlet and outlet ports, a rotor having an annular body portion mounted to rotate about said valve portion and end plates secured to said body portion, said end plates having inwardly extending ring portions abutting said valve portion and mounted to turn on the end portions of said shaft and upon which said body portion is mounted and journals in said frame for said hub portions, a shiftable ring member revolving with the rotor and defining therewith a chamber, said ring member being slidable between said end plates, reciprocating blades mounted in the body of the rotor and working between said end plate=a and defining with said rotor and ring member a plurality of pumping compartments, said rotor having passages to establish communication between said pumping compartments and said ports in said shaft as the rotor revolves, and means for shifting said ring member relative to the axis of rotation of the rotor to vary the output of the pump. A further object is to simplify and improve the rotary hydraulic pump shown and described in the patent of P. 0. Ott, No. 1,965,388, flied January 9, 1932. |
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