Controllable high volume positive displacement pump
First Claim
1. A controllable, positive displacement pump comprising, in combination,a drive motor, a pair of cylinders each having a sidewall and a head, a pair of pistons received in a respective one of said pair of cylinders, a crankshaft driven by said drive motor and having a respective pair of cranks for driving said pair of pistons, a pair of reciprocating inlet valves defining a pair of adjacent gratings disposed adjacent a respective one of said pair of cylinder sidewalls, and a pair of rotary outlet valves disposed adjacent a respective one of said pair of cylinder heads.
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Accused Products
Abstract
A controllable positive displacement pump for liquids and gases which may contain dispersed phase particles includes a pair of pistons operating out of phase. Each of the pistons is associated with an inlet valve which includes a fixed grating defining slots which extend parallel to piston travel and a complementarily configured grating which reciprocates transversely in timed relationship with the piston to control the influx of fluid. A rotary outlet valve is also associated with each piston and includes a rotating member disposed transversely across the cylinder head and which rotates in synchronism to open a through, radial port in the member in timed relationship to the piston travel. The positive displacement pump finds particular application to transport powder paint.
17 Citations
20 Claims
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1. A controllable, positive displacement pump comprising, in combination,
a drive motor, a pair of cylinders each having a sidewall and a head, a pair of pistons received in a respective one of said pair of cylinders, a crankshaft driven by said drive motor and having a respective pair of cranks for driving said pair of pistons, a pair of reciprocating inlet valves defining a pair of adjacent gratings disposed adjacent a respective one of said pair of cylinder sidewalls, and a pair of rotary outlet valves disposed adjacent a respective one of said pair of cylinder heads.
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11. A controllable, positive displacement pump comprising, in combination,
a drive motor, a pair of cylinders each having a sidewall and an end, a piston received in each of said pair of cylinders, a crankshaft driven by said drive motor and having a pair of cranks for driving a respective one of said pair of pistons, an inlet valve having a reciprocating grating associated with each of said pair of cylinder sidewalls, and a rotary outlet valve disposed adjacent each of said pair of cylinder heads.
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16. A controllable, positive displacement pump, comprising, in combination,
a housing defining a pair of cylinders having sidewalls and ends, a piston received in each of said cylinders, a crankshaft defining a pair of diametrically opposed cranks, one of said cranks operably coupled to a respective one of said pistons, a reciprocating inlet valve having a pair of gratings disposed adjacent said cylinder sidewall and said cylinder and, a rotary outlet valve associated with each of said cylinders and disposed adjacent said cylinder end, and a drive assembly for providing energy to said crankshaft and said reciprocating inlet valves and said rotary outlet valves.
Specification