초록 ▼

A hand held massage unit used for therapeutic purposes such as to loosen and mobilize bronchial secretions in patients, to improve blood circulation, and to relax muscles. The massage unit includes a vibration-free motor unit having a rotating output shaft directly connected to a vibratory head asse

A hand held massage unit used for therapeutic purposes such as to loosen and mobilize bronchial secretions in patients, to improve blood circulation, and to relax muscles. The massage unit includes a vibration-free motor unit having a rotating output shaft directly connected to a vibratory head assembly. The rotational motion of the output shaft is transformed into oscillating orbital motion about the shaft centerline in the adapter portion of the vibratory head assembly through an offset cam integrally formed as part of a counterbalanced eccentric. Counterweights within the eccentric reduce the vibrations transmitted to the user's hand and isolate the oscillating vibration of the vibratory head assembly. Undesired rotation of the vibratory head assembly is prevented by a mounting construction between the oscillating adapter components and a stationary portion of the vibratory head assembly secured to the motor unit.

대표청구항 ▼

1. A portable, self-contained, hand-held massage apparatus for use in the therapeutic application of repetitive force to a patient, comprising:a housing suitable for gripping by a human, the housing having a longitudinal axis; a motor having a output shaft, the motor being mounted axially within the

1. A portable, self-contained, hand-held massage apparatus for use in the therapeutic application of repetitive force to a patient, comprising:a housing suitable for gripping by a human, the housing having a longitudinal axis; a motor having a output shaft, the motor being mounted axially within the housing, the output shaft extending forward along the direction of the longitudinal axis of the housing; an oscillating member mounted within the housing directly attached to the output shaft of said motor, said oscillating member translating rotary motion of the output shaft into orbital oscillations, said oscillating member being vibrationally isolated from said housing, said oscillating member including an axial drive shaft, said oscillating member including; a back support in said housing and mounted about said axial drive shaft, said back support supporting said drive shaft on at least one bearing structure; a counter balance eccentric axially secured to said drive shaft forward of said back support, said eccentric having a forward surface and a rear surface, and an integral offset cam protruding from said forward surface, said eccentric surrounding a portion of said drive shaft; and an oscillating plate, said oscillating plate being mounted about said offset cam axially outwardly thereof, said oscillating plate oscillating in an orbital motion upon rotation of said drive shaft.