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A quick disconnect hub which is secured to the motor drive shaft receives a high pitch threaded pad driver disk to which a burnishing pad is mounted. The hub includes a conically tapered surface, as does the driver disk for centering. A spring-loaded locking pin extends between the burnishing motor

A quick disconnect hub which is secured to the motor drive shaft receives a high pitch threaded pad driver disk to which a burnishing pad is mounted. The hub includes a conically tapered surface, as does the driver disk for centering. A spring-loaded locking pin extends between the burnishing motor and selectively locks the drive hub against rotation for removal of the driver disk by rotating approximately one or two times, thus allowing the removal of the pad driver from the motor and allowing the centered mounting of the burnishing pad to the driver remote from the machine. In a preferred embodiment of the invention, an interlock switch is coupled to the spring-loaded locking pin such that, when the hub is locked against rotation for removal of the driver disk, the switch prevents inadvertent activation of the motor when the hub is locked.

대표청구항 ▼

A quick disconnect hub which is secured to the motor drive shaft receives a high pitch threaded pad driver disk to which a burnishing pad is mounted. The hub includes a conically tapered surface, as does the driver disk for centering. A spring-loaded locking pin extends between the burnishing motor

A quick disconnect hub which is secured to the motor drive shaft receives a high pitch threaded pad driver disk to which a burnishing pad is mounted. The hub includes a conically tapered surface, as does the driver disk for centering. A spring-loaded locking pin extends between the burnishing motor and selectively locks the drive hub against rotation for removal of the driver disk by rotating approximately one or two times, thus allowing the removal of the pad driver from the motor and allowing the centered mounting of the burnishing pad to the driver remote from the machine. In a preferred embodiment of the invention, an interlock switch is coupled to the spring-loaded locking pin such that, when the hub is locked against rotation for removal of the driver disk, the switch prevents inadvertent activation of the motor when the hub is locked. he support frame by at least one of screwing to the frame and using a system of hook and loop fasteners. 8. A bed assembly according to claim 1 wherein the cradle further includes a mattress placed thereon. 9. A bed assembly according to claim 1 wherein the cradle support engaging means is a frame structure disposed beneath and extending across said support frame. 10. A bed assembly according to claim 9, wherein the frame structure includes a set of raising arms adapted to be extendable and retractable when said first actuator mechanism acts upon said engaging means. 11. A bed assembly according to claim 10 wherein the raising arms are cantilevered to adopt a first folded position adjacent longitudinal sides of the support frame when retracted and a second perpendicular position with respect to the support surface when extended. 12. A bed assembly according to claim 10 wherein the frame structure further includes a pair of engagement transmission bars positioned on either side of the support frame and coupled to the raising arms to be raised and lowered with extended and retracted movement of the raising arms respectively. 13. A bed assembly according to claim 11 wherein the raising arms and transmission bars are moveable in unison. 14. A bed assembly according to claim 1 wherein the support frame is divided into a plurality of sections or plates. 15. A bed assembly according to claim 14 wherein the support frame has at least two sections adapted to be independently slidably or pivotally movable to be capable of adopting any number of conventional positions. 16. A bed assembly according to claim 1 wherein the support frame can be pivotally adjusted about an imaginary vertical plane passing through its centrally located longitudinal axis. 17. A bed assembly according to claim 1 wherein the base support can be at least one of raised, lowered, and tilted about a vertical axis. 18. A bed assembly for altering the position of a person supported thereon including: a longitudinal support frame having a support surface for receiving a person thereon, a base support on which the support frame is centrally pivotally mounted; a longitudinal cradle extending over the support surface, the cradle being attached to the support surface substantially along a central axis in the longitudinal direction thereof, the cradle further incorporating a recess extending along each side portion of the cradle in the longitudinal direction adapted for receiving and engaging an engaging means; a cradle support engaging means extendably mounted to the support frame in close relation to said recess adapted to be extendable and retractable in engaged relation within said recess along said side portions to promote change in configuration of said cradle; a first actuator mechanism disposed beneath the support frame in physical coupling relation to the engaging means for extending or retracting the engaging means; a second actuator mechanism coupled between the base support and longitudinal support frame for promoting independent pivot movement of the support frame about its longitudinal central axis; wherein, in a first condition, the first actuator mechanism causes the engaging means to extend towards and be received by said recess extending along said side portions, thereafter causing the cradle to move in positive engagement with the engaging means, with extending movement of the engaging means between a position of rest and a substantially concave configuration about the central longitudinal axis of the support surface, and, in a second condition, the first actuator mechanism causes the engaging means to retract to correspondingly promote movement of the cradle from said substantially concave configuration to said resting position conforming with the support surface, the change in configuration of the cradle between said first and second condition being controllably continuous, staggered or cyclical; and the second actuator mechanism is able to act