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US3926057A Expired / Lapsed US ⏱️ 0.0 years remaining

Spiral manometer

Assignee: United States Department of Agriculture
•
Filing: 1974-09-26
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Granted: 1975-12-16
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Expires: 1994-09-26
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Abstract

Abstract A new apparatus for measuring fluid (liquid and gas) pressure is disclosed. Specifically, this apparatus consists of a uniquely constructed manometer wherein the inclined leg member comprises a transparent tubing spirally wound around a vertical cylinder which is mounted on a flat round horizontal base plate. The vertical cylinder contains an internally affixed fluid reservoir. The flat round horizontal base plate comprises a system of vertical leveling screws and a leveling bubble for alignment.

Inventors

  • 👤 Roy V Baker

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-31 13:53
CPC Classifications
G; G01; G01L; G01L7/00; G01L7/18; G01L7/182

Claims Analysis

Total Claims: 30
Claim 1
Independent Claim 406 words
An apparatus for measuring pressure comprising: a. a vertical cylindrical support tube comprising: 1. a spiral groove circumscribing the outer surface of the vertical cylinder from the top to the bottom in equidistant spirals, 2. a plurality of equidistant vertical lines for indexing, inscribed on the outer surface of the vertical cylinder substantially the full length thereof, 3. a plurality of equidistant horizontal rings inscribed around the circumference of the outer surface and spaced and numbered from the top to the bottom of the vertical cylinder for indicating vertical distance measurements, 4. an access hole located near the lower end of the vertical support cylinder to allow for access of b. a transparent spiral tubing substantially of size and length to fit the spiral groove and attaching to c. a fluid reservoir member, designed and located to fit inside the upper top section of the vertical support cylinder and comprising: 1. a standard connecting means for connecting the lower and upper of the spiral tubing, 2. an access opening for adding fluid to the reservoir, 3. a standard connecting means utilized as a low pressure port, located on the top of the fluid reservoir to allow for pressure differential measurement, 4. a yoke member affixed to the outer top circumference of the vertical support cylinder and used to support a standard connection fitting which is installed through the yoke in such a manner that the top end of the transparent spiral tubing can be connected to the bottom of the fitting and the top of the standard connection forms the high pressure port as well as a connecting device for pressure differential measurement, 5. a means of attaching the reservoir to a 6. top ring designed to fit and substantially form the top of the vertical cylinder, said top ring also having two holes for guide pins which function for alignment of the reservoir with the top ring, d. a base member for supPort of the vertical cylinder comprising: 1. a round flat horizontal base piece with a male threaded center insert portion designed to fit the inside diameter of the female threaded vertical cylinder which is threaded on the inside diameter of the vertical cylinder thereby allowing the base to screw into the vertical support cylinder, 2. a level bubble attached to the upper surface of the round flat horizontal base piece to allow for visual leveling of the entire device, 3. a leveling means.
Claim 2
Independent Claim 406 words
An apparatus for measuring pressure comprising: a. a vertical cylindrical support tube comprising: 1. a spiral groove circumscribing the outer surface of the vertical cylinder from the top to the bottom in equidistant spirals, 2. a plurality of equidistant vertical lines for indexing, inscribed on the outer surface of the vertical cylinder substantially the full length thereof, 3. a plurality of equidistant horizontal rings inscribed around the circumference of the outer surface and spaced and numbered from the top to the bottom of the vertical cylinder for indicating vertical distance measurements, 4. an access hole located near the lower end of the vertical support cylinder to allow for access of b. a transparent spiral tubing substantially of size and length to fit the spiral groove and attaching to c. a fluid reservoir member, designed and located to fit inside the upper top section of the vertical support cylinder and comprising: 1. a standard connecting means for connecting the lower and upper of the spiral tubing, 2. an access opening for adding fluid to the reservoir, 3. a standard connecting means utilized as a low pressure port, located on the top of the fluid reservoir to allow for pressure differential measurement, 4. a yoke member affixed to the outer top circumference of the vertical support cylinder and used to support a standard connection fitting which is installed through the yoke in such a manner that the top end of the transparent spiral tubing can be connected to the bottom of the fitting and the top of the standard connection forms the high pressure port as well as a connecting device for pressure differential measurement, 5. a means of attaching the reservoir to a 6. top ring designed to fit and substantially form the top of the vertical cylinder, said top ring also having two holes for guide pins which function for alignment of the reservoir with the top ring, d. a base member for supPort of the vertical cylinder comprising: 1. a round flat horizontal base piece with a male threaded center insert portion designed to fit the inside diameter of the female threaded vertical cylinder which is threaded on the inside diameter of the vertical cylinder thereby allowing the base to screw into the vertical support cylinder, 2. a level bubble attached to the upper surface of the round flat horizontal base piece to allow for visual leveling of the entire device, 3. a leveling means.
Claim 3
Dependent Claim 22 words
a plurality of equidistant vertical lines for indexing, inscribed on the outer surface of the vertical cylinder substantially the full length thereof,
Claim 4
Dependent Claim 22 words
a plurality of equidistant vertical lines for indexing, inscribed on the outer surface of the vertical cylinder substantially the full length thereof,
Claim 5
Dependent Claim 29 words
The apparatus as defined in claim 1 wherein the vertical cylinder is thirty inches long with a four inch outside diameter and a three and one-half inch inside diameter.
Claim 6
Dependent Claim 24 words
a level bubble attached to the upper surface of the round flat horizontal base piece to allow for visual leveling of the entire device,
Claim 7
Dependent Claim 24 words
a level bubble attached to the upper surface of the round flat horizontal base piece to allow for visual leveling of the entire device,
Claim 8
Dependent Claim 9 words
an access opening for adding fluid to the reservoir,
Claim 9
Dependent Claim 9 words
an access opening for adding fluid to the reservoir,
Claim 10
Dependent Claim 32 words
The apparatus as defined in claim 1 wherein the equidistant spirals are spaced 0.978 inches apart and start 2 1/2 inches from the bottom and end 2 1/2 inches from the top.
Claim 11
Dependent Claim 24 words
a standard connecting means utilized as a low pressure port, located on the top of the fluid reservoir to allow for pressure differential measurement,
Claim 12
Dependent Claim 24 words
a standard connecting means utilized as a low pressure port, located on the top of the fluid reservoir to allow for pressure differential measurement,
Claim 13
Dependent Claim 3 words
a leveling means.
Claim 14
Dependent Claim 3 words
a leveling means.
Claim 15
Dependent Claim 33 words
a plurality of equidistant horizontal rings inscribed around the circumference of the outer surface and spaced and numbered from the top to the bottom of the vertical cylinder for indicating vertical distance measurements,
Claim 16
Dependent Claim 33 words
a plurality of equidistant horizontal rings inscribed around the circumference of the outer surface and spaced and numbered from the top to the bottom of the vertical cylinder for indicating vertical distance measurements,
Claim 17
Dependent Claim 72 words
a yoke member affixed to the outer top circumference of the vertical support cylinder and used to support a standard connection fitting which is installed through the yoke in such a manner that the top end of the transparent spiral tubing can be connected to the bottom of the fitting and the top of the standard connection forms the high pressure port as well as a connecting device for pressure differential measurement,
Claim 18
Dependent Claim 72 words
a yoke member affixed to the outer top circumference of the vertical support cylinder and used to support a standard connection fitting which is installed through the yoke in such a manner that the top end of the transparent spiral tubing can be connected to the bottom of the fitting and the top of the standard connection forms the high pressure port as well as a connecting device for pressure differential measurement,
Claim 19
Dependent Claim 58 words
an access hole located near the lower end of the vertical support cylinder to allow for access of b. a transparent spiral tubing substantially of size and length to fit the spiral groove and attaching to c. a fluid reservoir member, designed and located to fit inside the upper top section of the vertical support cylinder and comprising:
Claim 20
Dependent Claim 58 words
an access hole located near the lower end of the vertical support cylinder to allow for access of b. a transparent spiral tubing substantially of size and length to fit the spiral groove and attaching to c. a fluid reservoir member, designed and located to fit inside the upper top section of the vertical support cylinder and comprising:
Claim 21
Dependent Claim 29 words
The apparatus as defined in claim 1 wherein there are 100 equally spaced vertical inscribed lines with each tenth division color coded for distinguishing the tenths of an inch.
Claim 22
Dependent Claim 17 words
The apparatus as defined in claim 1 wherein the horizontal inscribed rings are spaced 0.978 inches apart.
Claim 23
Dependent Claim 8 words
a means of attaching the reservoir to a
Claim 24
Dependent Claim 8 words
a means of attaching the reservoir to a
Claim 25
Dependent Claim 23 words
The apparatus as defined in claim 1 wherein the means of attaching the reservoir to the top ring is a threaded screw fitting.
Claim 26
Dependent Claim 46 words
top ring designed to fit and substantially form the top of the vertical cylinder, said top ring also having two holes for guide pins which function for alignment of the reservoir with the top ring, d. a base member for supPort of the vertical cylinder comprising:
Claim 27
Dependent Claim 46 words
top ring designed to fit and substantially form the top of the vertical cylinder, said top ring also having two holes for guide pins which function for alignment of the reservoir with the top ring, d. a base member for supPort of the vertical cylinder comprising:
Claim 28
Dependent Claim 21 words
The apparatus as defined in claim 1 wherein the leveling means consists of three leveling screws in the horizontal base member.
Claim 29
Dependent Claim 15 words
The apparatus as defined in claim 1 wherein the fluid in the reservoir is water.
Claim 30
Dependent Claim 20 words
The apparatus as defined in claim 1 wherein the transparent spiral tubing functions as the inclined leg of a manometer.

References Cited (Backward Citations)

US841454A Cited
US3209597A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-12-15 1979-06-16 1979-12-16 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-12-15 1983-06-16 1983-12-16 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-12-15 1987-06-16 1987-12-16 $7700.00 Window Closed / Lapsed

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