High speed medical ventilator
First Claim
Patent Images
1. Apparatus for converting rotary motion about a rotary axis to reciprocatory motion along a fixed reciprocation axis inclined to said rotary axis comprising:
- a support means defining a longitudinally extending reciprocating axis,a motor having an output shaft rotatable about a longitudinally extending rotary axis, a swash plate mounted on said output shaft, said swash plate being mounted normally to said output shaft,a reciprocatible element mounted on said support means to reciprocate along said reciprocating axis, linkage means for interconnecting said swash plate with said reciprocating element and having opposite ends, said swash plate having first connector means eccentrically mounted thereto and rotatable in a plane parallel to said swash plate, one end of said linkage means being connected to said first connector means, said reciprocating element having second connector means mounted centrally thereof, the opposite end of said linkage means being connected to said second connector means, said first and second connector means permitting universal movement of said opposite ends therewith whereby a component of reciprocating motion developed at said swash plate is transferred to said reciprocating element, andsaid motor being pivotally mounted to said support means about a pivot located at the intersection of said reciprocating axis and the plane in which said first connector rotates such that pivoting said motor pivots said swash plate and shaft as a unit and varies the angle of inclination of the rotary axis to the reciprocating axis.
2 Assignments
0 Petitions
Accused Products
Abstract
A swash plate assembly converts rotary motion to reciprocatory motion to reciprocate a diaphragm in a high frequency medical ventilator; the motor which drives the assembly is pivotally mounted for variation of the stroke of reciprocation thereby varying the tidal volume displaced by the diaphragm.
53 Citations
15 Claims
-
1. Apparatus for converting rotary motion about a rotary axis to reciprocatory motion along a fixed reciprocation axis inclined to said rotary axis comprising:
-
a support means defining a longitudinally extending reciprocating axis, a motor having an output shaft rotatable about a longitudinally extending rotary axis, a swash plate mounted on said output shaft, said swash plate being mounted normally to said output shaft, a reciprocatible element mounted on said support means to reciprocate along said reciprocating axis, linkage means for interconnecting said swash plate with said reciprocating element and having opposite ends, said swash plate having first connector means eccentrically mounted thereto and rotatable in a plane parallel to said swash plate, one end of said linkage means being connected to said first connector means, said reciprocating element having second connector means mounted centrally thereof, the opposite end of said linkage means being connected to said second connector means, said first and second connector means permitting universal movement of said opposite ends therewith whereby a component of reciprocating motion developed at said swash plate is transferred to said reciprocating element, and said motor being pivotally mounted to said support means about a pivot located at the intersection of said reciprocating axis and the plane in which said first connector rotates such that pivoting said motor pivots said swash plate and shaft as a unit and varies the angle of inclination of the rotary axis to the reciprocating axis. - View Dependent Claims (2, 3, 4, 5, 8)
-
-
6. A high frequency medical ventilator for converting rotary motion about a rotary axis to reciprocatory motion along a fixed reciprocation axis inclined to said rotary axis comprising:
-
a support frame defining a longitudinally extending reciprocating axis, a motor having an output shaft rotatable about a longitudinally extending rotary axis, a swash plate mounted on said output shaft, said swash plate being mounted normally to said output shaft, a chamber mounted on said support frame having an open end and outlet means adapted to be connected to patient breathing circuitry, a reciprocating diaphragm for establishing ventilation mounted on said open end, said chamber being oriented such that said diaphragm reciprocates along said reciprocating axis, linkage means for interconnecting said swash plate with said reciprocating diaphragm and having opposite ends, said swash plate having first connector means eccentrically mounted thereto and rotatable in a plane parallel to said swash plate, one end of said linkage means being connected to said first connector means, said reciprocating diaphragm having second connector means mounted centrally thereof, the opposite end of said linkage means being connected to said second connector means, said first and second connector means permitting universal movement of said opposite ends therewith whereby a component of reciprocating motion developed at said swash plate is transferred to said reciprocating diaphragm, and said motor being pivotally mounted to said support means about a pivot located at the intersection of said reciprocating axis and the plane in which said first connector rotates such that pivoting said motor pivots said swash plate and shaft as a unit and varies the angle of inclination of the rotary axis to the reciprocating axis, said linkage means comprising ball joint means including a first bearing housing connected to said swash plate for rotation therewith, and a second bearing housing connected to said diaphragm for reciprocatory motion therewith and first and second spherical bearings being connected by a rod, said first spherical bearing being bearingly mounted in said first bearing housing, and said second spherical bearing being bearingly mounted in said second bearing housing. - View Dependent Claims (7, 9, 11, 12)
-
-
10. A medical ventilation system for converting rotary motion about a rotary axis to reciprocatory motion along a fixed reciprocation axis inclined to said rotary axis comprising:
-
a support frame defining a longitudinally extending reciprocating axis, a motor having an output shaft rotatable about a longitudinally extending rotary axis, a swash plate mounted on said output shaft, said swash plate being mounted normally to said output shaft, a chamber mounted on said support frame having an open end and outlet means adapted to be connected to patient breathing circuitry, a reciprocating diaphragm for establishing ventilation mounted on said open end, said chamber being oriented such that said diaphragm reciprocates along said reciprocating axis, ball joint bearing linkage means for interconnecting said swash plate with said reciprocating diaphragm and having opposite ends, said swash plate having first connector means eccentrically mounted thereto and rotatable in a plane parallel to said swash plate, one end of said linkage means being connected to said first connector means, said reciprocating diaphragm having second connector means mounted centrally thereof, the opposite end of said linkage means being connected to said second connector means, said first and second connector means permitting universal movement of said opposite ends therewith whereby a component of reciprocating motion developed at said swash plate is transferred to said reciprocating diaphragm, and said motor being pivotally mounted to said support means about a pivot located at the intersection of said reciprocating axis and the plane in which said first connector rotates such that pivoting said motor pivots said swash plate and shaft as a unit and varies the angle of inclination of the rotary axis to the reciprocating axis, tube means adapted to communicate said chamber with a body to be ventilated and gas inlet means for introducing a ventilating gas into said tube means. - View Dependent Claims (13, 14, 15)
-
Specification