Patent Application
20110204101
This invention relates to nozzles, more particularly to nozzles of the fire fighting type.
Conventionally, a nozzle is connected to an end portion of a fire hose and is used to direct fluids discharged from the hose. The nozzle is sometimes provided with an on/off mechanism for selectably controlling the discharge of fluids from the nozzle. Some nozzles also provide means for varying the flow rate of the fluids and/or the pattern in which fluids are discharged.
Many nozzles that are used in conjunction with firefighting apparatus are highly sophisticated pieces of equipment, containing a number of complex interconnected components. The more components involved, the more labor is required to produce the nozzles, adding to the expense. Consequently, many cost-constrained firefighting organizations have fewer nozzles in their inventory than is desirable. This is particularly true for developing nations where funds to purchase firefighting equipment are limited.
A nozzle assembly is disclosed according to several embodiments of the present invention. The nozzle assembly is made from fewer components than current nozzles. Previously separate components are consolidated together and made as a unit, reducing overall component cost. A reduced parts count also reduces the amount of labor required to assemble and repair the nozzles. The combination of reduced material cost and reduced labor results in a nozzle having a lower cost than present nozzles, without sacrificing reliability or performance.
In one embodiment of the present invention an adjustable flow nozzle assembly has a generally hollow shutoff body comprising a unitary member. The shutoff body further includes an inlet portion, an outlet portion, a shutoff body portion, a nozzle body adapter portion, and a nozzle body portion.
In another embodiment of the present invention a fixed flow nozzle assembly has a generally hollow shutoff body comprising a unitary member. The shutoff body further includes an inlet portion, an outlet portion, a shutoff body portion, a throat portion, and a nozzle body portion.
Further features of the inventive embodiments will become apparent to those skilled in the art to which the embodiments relate from reading the specification and claims with reference to the accompanying drawings, in which:
and
The general arrangement of a nozzle assembly 70 is shown in
A shutoff handle 16 is pivotably coupled to a unitary shutoff body 11. Shutoff handle 16 is further coupled to a flow-controlling ball 8 by a pair of trunnions 17 such that pivoting the shutoff handle causes the ball to move rotatably in an inlet portion 62 of unitary shutoff body 11. Ball 8 is generally solid and has a bore disposed therethrough, forming ports at opposing ends of a closed wall. In operation, moving handle 16 such that the bore of the ball is generally aligned with inlet 62 allows pressurized fluid supplied to a swivel 1 of nozzle assembly 70 to flow through the inlet and an outlet 64 of the unitary shutoff body 11, exiting the nozzle assembly. Moving handle 16 such that the bore of ball 8 is less aligned with inlet portion 62 (i.e., at an angle to the inlet portion) reduces the flow of fluid through nozzle assembly 70. Nozzle assembly 70 is in an “Off” condition with essentially no fluid flowing therethrough when the bore of ball 8 is rotated forward and completely out of alignment with inlet portion 62, thus leaving only the closed wall of the ball to confront fluid entering the inlet portion.
The spray pattern of fluids discharged from nozzle assembly 70 is selectably set by rotatably adjusting a pattern sleeve 38 with respect to unitary shutoff body 11. The pattern of fluid emitted from outlet portion 64 of nozzle assembly 70 is adjustable from a narrowly-focused stream to a widely-focused “fog.”
In one embodiment of the present invention a cam insert 60 may be coupled to unitary shutoff body 11. Cam insert 60 is preferably made from a durable material, such as steel, to deter wear in a cam slot 66 of the insert due to movement of a cam screw 29 in the cam slot when rotating pattern sleeve 38 to adjust the pattern of fluid exiting outlet portion 64 of the nozzle assembly 70.
The flow rate of fluids through nozzle assembly 70 is variable and is adjusted by varying the position of a control ring 26. Actuating control ring 26 varies the position of a discharge tube 27 with respect to a baffle head 35, thereby controlling the size of an aperture delimited by the discharge tube and the baffle head. Increasing the size of the aperture increases the rate of fluid flow through nozzle assembly 70, while decreasing the size of the aperture decreases the rate of fluid flow through the nozzle assembly.
Table 1, below, is a parts list of an exemplary nozzle assembly 70. It will be understood that the various components listed in Table 1 are for reference only and may be substituted with similar components within the scope of the invention.
The general arrangement of a nozzle assembly 170 is shown in
A shutoff handle 116 is pivotably coupled to a unitary shutoff body 111. Shutoff handle 116 is further coupled to a flow-controlling ball 108 by a pair of trunnions 117 such that pivoting the shutoff handle causes the ball to move rotatably in an inlet portion 162 of unitary shutoff body 111. Ball 108 is generally solid and has a bore disposed therethrough, forming ports at opposing ends of a closed wall. In operation, moving handle 116 such that the bore of the ball is generally aligned with inlet 162 allows pressurized fluid supplied to a swivel 101 of nozzle assembly 170 to flow through the inlet and an outlet 164 of the unitary shutoff body 111, exiting the nozzle assembly. Moving handle 116 such that the bore of ball 108 is less aligned with inlet portion 162 (i.e., at an angle to the inlet portion) reduces the flow of fluid through nozzle assembly 170. Nozzle assembly 170 is in an “Off” condition with essentially no fluid flowing therethrough when the bore of ball 108 is rotated forward and completely out of alignment with inlet portion 162, thus leaving only the closed wall of the ball to confront fluid entering the inlet portion.
The spray pattern of fluids discharged from nozzle assembly 170 is selectably set by rotatably adjusting a pattern sleeve 120 with respect to unitary shutoff body 111. The pattern of fluid emitted from outlet portion 164 of nozzle assembly 170 is adjustable from a narrowly-focused stream to a widely-focused “fog.”
In one embodiment of the present invention a cam insert 160 may be coupled to unitary shutoff body 111. Cam insert 160 is preferably made from a durable material, such as stainless steel, to deter wear in a cam slot 166 of the insert due to movement of a cam screw 121 in the cam slot when rotating pattern sleeve 120 to adjust the pattern of fluid exiting outlet portion 164 of the nozzle assembly 170.
The flow rate of fluids through nozzle assembly 170 is fixed by the size of an aperture delimited by a baffle head 123 and outlet portion 164. The size of the aperture may be increased, thus increasing the flow of fluid through nozzle assembly 170, by increasing the overall thickness of spacer 126 between baffle head 123 and a baffle stem 127. Conversely, size of the aperture may be decreased, thus decreasing the flow of fluid through nozzle assembly 170, by reducing the overall thickness of spacer 126 between baffle head 123 and a baffle stem 127.
Table 2, below, is a parts list of an exemplary nozzle assembly 170. It will be understood that the various components listed in Table 2 are for reference only and may be substituted with similar components within the scope of the invention.
Unitary shutoff body 11, 111 reduces the cost and labor associated with production, assembly and repair as compared with nozzle assemblies having a plurality of shutoff body components. With reference to
In addition, the features of inlet portion 62, 162 are preferably machined or otherwise formed with a single tooling or machining set-up. Likewise, the features of outlet portion 64, 164 are preferably machined or otherwise formed with a single tooling or machining set-up. An advantage of a unitary shutoff body 11, 111 and machining inlet portions 62, 162 and outlet portions 64, 164 in this manner is improved tolerances of the machined features of the inlet and outlet portion with respect to a centerline “CL” of nozzle 70, 170, resulting in a fluid spray pattern discharge from the nozzle assembly having high uniformity using a fixed baffle. In contrast, prior nozzle assemblies typically include shutoff bodies comprising plural components and a number of machining set-ups, introducing small but cumulative errors in the locations of the features of the shutoff body. If off by even the slightest degree, the spray pattern discharged from the nozzle can be non-uniform, an undesirable characteristic and generally required the use of a more complex, “floating” baffle assembly.
It should be further noted that other components of the nozzles of the present invention may be consolidated in order to reduce the cost of the nozzles, within the scope of the invention. As a non-limiting example, swivel 1, 101 and swivel adapter 5, 105 may be made as a single piece having a swivel portion and an adapter portion. In addition, nozzle assemblies 70, 170 may utilize either a fixed baffle assembly or a floating baffle assembly.
While this invention has been shown and described with respect to a detailed embodiment thereof, it will be understood by those skilled in the art that changes in form and detail thereof may be made without departing from the scope of the claims of the invention.
This application claims priority to U.S. provisional patent application No. 61/307,067, filed Feb. 23, 2010, the contents of which are hereby incorporated by reference.
| Number | Date | Country | |
|---|---|---|---|
| 61307067 | Feb 2010 | US |
