Radial gear driven piston pump
US5046931A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 9, 1990 |
| Grant date | Sep 10, 1991 |
| Priority date | — |
| Expiry date | Jul 9, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B1/1071
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The radial gear driven piston pump (10) comprises a stationary pintle or pin (40) having a rotatable rotor (30) mounted thereon. The rotor (30) and pintle (40) are disposed within a pumping bore (18) that is eccentrically aligned relative to bore extensions (28) receiving the pintle (40). The rotor (30) is driven by an offset motor (12) which engages a periphery of the rotor (30). The pintle (40) has therein two pairs of longitudinal passages comprising supply (46, 53) and discharge (47, 54) channels which communicate with respective intake (41, 43) and exhaust (42, 44) ports within the pump housing (16). The rotor (30) has sets of axially offset pistons (90, 100) received within piston cavities (93, 93'). Each set of piston (90, 100) comprises a metal piston cap (95) having a central opening (90) which receives a longitudinal extension (97) of a piston sealing ring (98). Each piston sealing ring (98) has an opening (111) extending into the longitudinal extension (97) in order to house a spring which engages a recess (34) of the piston cavity (93) to bias the piston outwardly into engagement with a bearing mechanism (70) disposed within the pumping bore (18). Each piston cavity (93…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.