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US 7,458,613 B2Granted
Rotatable fire sprinkler fitting
AssigneeSpears Manufacturing Co.
InventorWayne Spears
Life of this patent
Estimating the term…
Abstract
A fire sprinkler fitting has a cylindrical body and an insert. The insert has an inner end which is disposed within a proximal portion of the bore, such that the outer end protrudes beyond the open bore end by a distance D. The outer end has internal threads which are sized and dimensioned to accept and retain a fire sprinkler therein. The insert is rotatable within the body without effecting the distance D.
Claims19
A fire sprinkler fitting comprising:
- (a) a cylindrical polymeric body defining a bore with a center line, an open bore end, the bore having a distal portion adjacent to the open bore end and a proximal portion spaced apart from the open bore end, the proximal portion defining a shoulder disposed in a plane perpendicular to the center line;
- (b) an insert having an outer end and an inner end, the inner end being disposed within the proximal portion of the bore such that the outer end protrudes beyond the open bore end, the outer end having internal threads which are sized and dimensioned to accept and retain a fire sprinkler therein, the inner end having a circumferential flange which abuts and is retained by the shoulder defined within the proximal portion of the bore in the cylindrical body, the insert having a melting point greater than that of the polymeric body;
- and
- (c) a metal collar disposed tightly around the polymeric body such that the collar extends around the distal bore portion, but not around the proximal bore portion;
- whereby the insert is rotatable within the polymeric body.
2 more elements
A fire sprinkler fitting comprising:
- (a) a cylindrical polymeric body defining a bore with a center line, an open bore end, the bore having a distal portion adjacent to the open bore end and a proximal portion spaced apart from the open bore end, the proximal portion defining a shoulder disposed in a plane perpendicular to the center line;
- (b) a metallic insert having an outer end and an inner end, the inner end being disposed a distance L within the proximal portion of the bore such that the outer end protrudes beyond the open bore end, the outer end having internal threads which are sized and dimensioned to accept and retain a fire sprinkler therein, the inner end having a circumferential flange which abuts and is retained by the shoulder defined within the proximal portion of the bore in the cylindrical body, the metallic insert further comprising a wrench head defined around the outer end;
- and
- (c) a metal collar disposed tightly around the polymeric body such that the collar extends around the distal bore portion, but not around the proximal bore portion;
- whereby the metallic insert is rotatable within the polymeric body.
2 more elements
A fire sprinkler fitting comprising:
- (a) a cylindrical polymeric body defining a bore with a center line, an open bore end, the bore having a distal portion adjacent to the open bore end and a proximal portion spaced apart from the open bore end, the proximal portion defining a shoulder disposed in a plane perpendicular to the center line;
- (b) a metallic insert having an outer end and an inner end, the inner end being disposed a distance L within the proximal portion of the bore such that the outer end protrudes beyond the open bore end, the outer end having internal threads which are sized and dimensioned to accept and retain a fire sprinkler therein, the inner end having a circumferential flange which abuts and is retained by the shoulder defined within the proximal portion of the bore in the cylindrical body, the metallic insert further comprising a wrench head defined around the outer end;
- (c) an elastomeric seal disposed within the metallic insert, at the base of the metallic insert, for sealing a fire sprinkler to the metallic insert;
- and
- (d) a metal collar disposed tightly around the polymeric body such that the collar extends around the distal bore portion, but not around the proximal bore portion;
- whereby the metallic insert is rotatable within the polymeric body but only upon application of a torque to the metal insert greater than about 2.5 ft-lbs.
3 more elements
A fire sprinkler fitting comprising:
- (a) a cylindrical body defining a bore with a center line, an open bore end, the bore having a distal portion adjacent to the open bore end and a proximal portion spaced apart from the open bore end, the proximal portion defining a shoulder disposed in a plane perpendicular to the center line;
- and
- (b) an insert having an outer end and an inner end, the inner end being disposed within the proximal portion of the bore such that the outer end protrudes beyond the open bore end by a distance D, the outer end having internal threads which are sized and dimensioned to accept and retain a fire sprinkler therein, the inner end having a circumferential flange which abuts and is retained by the shoulder defined within the proximal portion of the bore in the cylindrical body;
- wherein the insert is rotatable within the body without affecting the distance D.
1 more element
Dependencies are inferred from the claim text.