Oscillator apparatus for imparting axial oscillations to a roller
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United States of America Patent
Stats
-
Jun 30, 1992
Grant Date -
N/A
app pub date -
Sep 21, 1990
filing date -
Sep 21, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An oscillator apparatus for imparting axial oscillations to a roller (10). The roller (10) has at least a cylindrical outer core (12) rotatable about a stationary shaft (14), that is, the shaft (14) is stationary relative to the outer core (12) of the roller (10). The oscillator apparatus is connected to a supply (46) for providing a pressurized medium. The oscillator apparatus has at least one reciprocating assembly (30, 32) having a substantially stationary portion attached to the stationary shaft (14) and a moveable portion attached to the outer core (12), the reciprocating assembly (30, 32) also having at least first and second ports (52, 54) connected to the supply (46). The supply (46) alternately provides the pressurized medium to the first and second ports (52, 54) to activate the reciprocating assembly (30, 32). The reciprocating assembly (30, 32) is a piston assembly having a piston (30) moveable within a housing (32) between a first area (34) connected to the first port (52) and a second area (36) connected to the second port (54). Either, the housing (32) can be the substantially stationary portion and the piston (30) can be the moveable portion, or the housing (32) can be the moveable portion and the piston (30) can be the substantially stationary portion. The oscillator apparatus further has an anti-rotation pin (56) on the stationary shaft (14) for engaging the moveable portion of the reciprocating assembly (30, 32) to prevent the moveable portion of the reciprocating assembly (30, 32) from rotating about the shaft (14). Furthermore, the oscillator apparatus can have at least first and second passages (84, 86) in the stationary shaft (14) extending from substantially an end (18) of the shaft (14) to the location of the reciprocating assembly (70, 72) on the shaft and interfacing with the first and second ports (74, 76), respectively, thereat, the supply (46) being connected to the first and second ports (74, 76) via the first and second passages (84,86), respectively.
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