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Radial Multipiston Air Pump

IP.com Disclosure Number: IPCOM000073620D
Original Publication Date: 1971-Jan-01
Included in the Prior Art Database: 2005-Feb-22
Document File: 2 page(s) / 48K

Publishing Venue

IBM

Related People

Block, EE: AUTHOR [+2]

Abstract

The pump comprises three or more equally spaced pistons 10, disposed radially about cam drive shaft 14 and actuated by an eccentric cam 12 to discharge at different rotative positions of the shaft to provide a nearly constant pressure in tank 16. Each of pistons 10 is disposed in a cylinder 18 fixed on mounting plate 20. A spring 22 in each chamber holds the pistons in contact with cam 12. A valve 24 is disposed in each cylinder and provides an air connection from the associated piston to outlets 26. Similar valves 28 are provided on the outer end of each piston to provide air inlets into the associated cylinders. Valves 24 and 28 each include a piece of shim stock 30 yieldably closing associated air port.

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Radial Multipiston Air Pump

The pump comprises three or more equally spaced pistons 10, disposed radially about cam drive shaft 14 and actuated by an eccentric cam 12 to discharge at different rotative positions of the shaft to provide a nearly constant pressure in tank 16. Each of pistons 10 is disposed in a cylinder 18 fixed on mounting plate 20.

A spring 22 in each chamber holds the pistons in contact with cam 12. A valve 24 is disposed in each cylinder and provides an air connection from the associated piston to outlets 26. Similar valves 28 are provided on the outer end of each piston to provide air inlets into the associated cylinders. Valves 24 and 28 each include a piece of shim stock 30 yieldably closing associated air port. Each of pistons when moved outwardly by cam 12 pumps air through valve 24 into outlet 26 and tank 16 and, on the return stroke, allows air to enter through valves 28 into the associated cylinder. The pump is a low-cost, low-noise, and low-vibration device providing a substantially constant supply of air under pressure.

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