US4330491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling tower water distribution pipe and suspension system therefor
Assignee: Zurn Industries LLC
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Filing: 1980-10-08
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Granted: 1982-05-18
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Expires: 2000-10-08
Abstract
Abstract The distribution pipe which is horizontally mounted includes longitudinal reinforcement ribs formed of an increased wall thickness and extending substantially the length of the pipe preferably along the interior surface thereof. One such rib extends along the top of the pipe and preferably two ribs extend in parallel and spaced relationship along the bottom of the pipe. The pipe is formed of a polyester resin having fiberglass reinforcement extending longitudinally throughout the wall and ribs. External stiffener rings are positioned on the pipe at spaced intervals defined by support locations and the pipe is suspended from concrete beams by cable extending about the pipe and beams. The cable is connected above the beams and forms loops below the beam, which loops extend about the external ring stiffeners.
Inventors
- 👤 Mahendra F. Doshi
- 👤 Martin V. Gruber
- 👤 Frederick R. Steinlein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:41
CPC Classifications
F; F28; F28F; F28F25/00; F28F25/02; Y; Y10; Y10S; Y10S261/00; Y10S261/11
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
183 words
In a counterflow cooling tower including structural supports for a water distribution pipe, the improvement comprising: A. a plurality of spaced horizontal concrete beam structural supports; B. a distribution pipe formed of fiberglass reinforced polyester resin having longitudinal reinforcing integral ribs formed of an increased wall thickness extending along an interior surface of the pipe throughout the length thereof, one such rib positioned along the pipe top and at least one such rib positioned along the pipe bottom; C. external ring stiffeners positioned about the pipe and spaced at the same intervals as the structural supports; and D. a suspension system extending about the supports and the external ring stiffeners to suspend the pipe transverse of and below the supports, said suspension system including groups of two lengths of stainless steel cable extending about the pipe, each cable connected above the supports and forming loops below the support, each loop extending about a ring stiffener, and bearing pads positioned between the beams and pipes, said pipe having an end cap at one end and secured within a water trough at its opposite end.
Claim 2
Dependent Claim
183 words
In a counterflow cooling tower including structural supports for a water distribution pipe, the improvement comprising: A. a plurality of spaced horizontal concrete beam structural supports; B. a distribution pipe formed of fiberglass reinforced polyester resin having longitudinal reinforcing integral ribs formed of an increased wall thickness extending along an interior surface of the pipe throughout the length thereof, one such rib positioned along the pipe top and at least one such rib positioned along the pipe bottom; C. external ring stiffeners positioned about the pipe and spaced at the same intervals as the structural supports; and D. a suspension system extending about the supports and the external ring stiffeners to suspend the pipe transverse of and below the supports, said suspension system including groups of two lengths of stainless steel cable extending about the pipe, each cable connected above the supports and forming loops below the support, each loop extending about a ring stiffener, and bearing pads positioned between the beams and pipes, said pipe having an end cap at one end and secured within a water trough at its opposite end.
Claim 3
Dependent Claim
32 words
The improvement of claim 1, including two ribs extending along the bottom of the pipe, said two ribs positioned in parallel and spaced relationship on opposite sides of the vertical center line.
Claim 4
Dependent Claim
44 words
The improvement of claim 1, each of said ribs having approximately twice the amount of glass fibers in the rib as the wall and a flexure modulus at least two and preferably two and one-half times the remainder of the wall of the pipe.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-17 | 1985-11-16 | 1986-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-17 | 1989-11-16 | 1990-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-17 | 1993-11-16 | 1994-05-18 | $7700.00 | Window Closed / Lapsed |