Adjustable dry pendant sprinkler head assembly
AssigneeCentral Sprinkler Corporation
InventorJames R. Anderson
Life of this patent
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Abstract
An adjustable drop nipple is disclosed for installing fire protection sprinkler systems which comprise sprinkler head assemblies of the dry, pendant type. The downwardly extending length of a drop nipple having a sprinkler head thereon is adjusted by sliding the nipple axially in a collet having an externally tapered section that engages an internally tapered section of a stationary collet holder. When a selected drop length has been established, the collet is then compressed axially against the collet holder with tightening means whereby the nipple is firmly gripped by the collet so that axial sliding thereof is prevented, thereby maintaining the nipple at the selected drop length.
Claims20
A vertically adjustable drop nipple comprising:
- a. a nipple,
- b. a collet through which said nipple is inserted axially and which has an externally tapered section thereon,
- c. a collet holder having an internally tapered section therein and into which said collet is inserted, said externally and internally tapered sections being in confronting abutment against each other, and
- d. tightening means whereby said collet is thrust axially within said holder and is thereby compressed for gripping said nipple and securing it from axial movement within said holder.
Dependencies are inferred from the claim text.