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US 9,067,220 B2Granted
Self regulating fluid bearing high pressure rotary nozzle
AssigneeStoneage, Inc.
InventorDouglas E. Wright
Life of this patent
Estimating the term…
Abstract
A fluid bearing nozzle assembly is disclosed that has a hollow cylindrical body, an inlet nut fastened to the cylindrical body, and a hollow tubular shaft member coaxially carried within the housing body and captured between the inlet nut and the body. The inlet nut has a stem portion extending into a central bore through the shaft member forming an inlet bearing area rotatably carrying the shaft member thereon. The shaft member has a spray head fastened thereto for rotation of the head with the shaft member. An inner wall of the housing body and an outer portion of the shaft have complementary shapes forming a regulating passage therebetween. The shaft has helical grooves that spiral around the shaft to one or both ends to impart rotation to the shaft and spray head.
Claims20
A fluid bearing nozzle assembly for spraying high pressure fluid comprising:
- an inlet nut;
- a hollow cylindrical body;
- and
- a hollow tubular shaft member coaxially carried within the hollow cylindrical body and captured between the inlet nut and the body, the inlet nut having a stem portion extending into a central bore, the stem portion forming an inlet bearing area rotatably carrying the shaft member thereon, the shaft member having an outlet end near an outlet end of the housing body, the outlet end of the shaft member receiving a spray head fastened thereto for rotation of the head with the shaft member, said inlet nut having a central passage to conduct fluid through the inlet nut to said outlet end of the shaft member;
- an inner wall of the hollow cylindrical body and an outer portion of the shaft having complementary surface shapes together forming a regulating passage therebetween, said shaft member having one or more bores communicating between the inlet bearing area and the regulating passage, wherein pressure of fluid within the regulating passage acts axially upon the shaft to counter axial force on the shaft resulting from fluid pressure acting upon an inlet end of the shaft, and wherein the outer portion of the shaft has a helical groove there-around extending from the one or more bores along a substantial portion of the outer portion of the shaft and wherein fluid flow through the regulating passage and the helical groove imparts a rotational torque on the shaft to cause rotation of the shaft on the stem portion of the inlet nut.
2 more elements
A nozzle assembly for spraying high pressure fluid against an object comprising:
- a hollow cylindrical body;
- an inlet nut;
- a hollow tubular shaft member coaxially carried within the housing body and captured between the inlet nut and the body, the inlet nut having a stem portion extending into a central bore through the shaft member, the stem portion forming an inlet bearing area rotatably carrying the shaft member thereon, the shaft member having an outlet end near an outlet end of the hollow cylindrical body, the outlet end of the shaft member receiving a spray head fastened thereto for rotation of the head with the shaft member, said inlet nut having a central passage to conduct fluid through the inlet nut to said outlet end of the shaft member;
- and
- a tubular shroud around the hollow body and the shaft member, the shroud fastened to a portion of the hollow body;
- an inner wall of the housing body and an outer portion of the shaft having complementary surface shapes together forming a regulating passage therebetween, said shaft member having one or more bores communicating between the inlet bearing area and the regulating passage, wherein pressure of fluid within the regulating passage acts axially upon the shaft to counter axial force on the shaft resulting from fluid pressure acting upon an inlet end of the shaft, and wherein the outer portion of the shaft has a helical groove there-around extending from the one or more bores along a substantial portion of the outer portion of the shaft and wherein fluid flow through the regulating passage and the helical groove imparts a rotational torque on the shaft to cause rotation of the shaft on the stem portion of the inlet nut.
3 more elements
A nozzle assembly for spraying high pressure fluid against an object comprising:
- a hollow cylindrical body;
- an inlet nut;
- a hollow tubular shaft member coaxially carried within the housing body and captured between the inlet nut and the body, the inlet nut having a stem portion extending into a central bore through the shaft member, the stem portion forming an inlet bearing area rotatably carrying the shaft member thereon, the shaft member having an outlet end near an outlet end of the hollow cylindrical body, the outlet end of the shaft member receiving a spray head fastened thereto for rotation of the head with the shaft member, said inlet nut having a central passage to conduct fluid through the inlet nut to said outlet end of the shaft member;
- and
- a tubular shroud around the hollow body, the shroud fastened to a portion of the hollow body;
- an inner wall of the housing body and an outer portion of the shaft having complementary surface shapes together forming a regulating passage therebetween, said shaft member having one or more bores communicating between the inlet bearing area and the regulating passage, wherein pressure of fluid within the regulating passage acts axially upon the shaft to counter axial force on the shaft resulting from fluid pressure acting upon an inlet end of the shaft, and wherein the outer portion of the shaft has a helical groove there-around extending from the one or more bores along a substantial portion of the outer portion of the shaft and wherein fluid flow through the regulating passage and the helical groove imparts a rotational torque on the shaft to cause rotation of the shaft on the stem portion of the inlet nut, and wherein a portion of fluid flow through the regulating passage passes through one or more weep holes through the housing body to a gap formed between the housing body and the shroud, wherein a rear face of the shaft and the inlet nut form therebetween a balancing chamber communicating with the one or more weep holes for relieving fluid from within the balancing chamber.
3 more elements
Dependencies are inferred from the claim text.