Patent US2812284A successfully refreshed from Google Patents.
Patent US3776041A successfully refreshed from Google Patents.
US3776041A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil filled pressure gauge
Assignee: Dresser Industries Inc
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Filing: 1971-06-18
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Granted: 1973-12-04
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Expires: 1991-06-18
Abstract
Abstract An oil receptive casing of a pressure gauge affording improvements for oil fill. Improvements include complete oil coverage over the dial face for undistorted readability and uninterrupted pointer dampening. A gasket seal construction at the casing and Bourdon tube socket joint maintains leak-tight reliability of the casing. An air cushion of controlled volume readily trapped behind the dial face, receives a removably secured safety plug enabling atmospheric venting in event of excessive internal overpressure.
Inventors
- 👤 R Wetterhorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:22
CPC Classifications
G; G01; G01L; G01L7/00; G01L7/02; G01L7/04; G01L7/041; Y; Y10; Y10S; Y10S277/00; Y10S277/91; Y10S285/00; Y10S285/917
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
218 words
A pressure gauge comprising in combination: a. a pressure sensitive element operably responsive to changes in pressure to which it is exposed; b. a sealed housing containing said pressure sensitive element and comprising components supported in leak-tight relation to each other including: 1. a cup-shaped casing having a back wall and a laterally extending shell wall enclosure peripherally connected thereto; and 2. a crystal secured to internally of said casing; c. plate means secured to internally of said casing at a location laterally intermediate said crystal and said back casing wall to substantially define a front compartment space disposed thereat extending toward said crystal and a rear compartment space disposed thereat extending toward said casing backwall; d. inlet port means extending through an outer wall of said casing defining an external to internal access to one of said compartments through which to receive oil internally of said housing for fill to a predetermined level at which to insure a controlled size air cushion openly exposed in contact with the oil fill within the housing; and e. trap means defined by said plate means and operatively effective to enable trapped position transfer of the air cushion from the space in said front compartment to substantially totally within said rear compartment space for the intended operable orientation of said housing.
Claim 2
Dependent Claim
218 words
A pressure gauge comprising in combination: a. a pressure sensitive element operably responsive to changes in pressure to which it is exposed; b. a sealed housing containing said pressure sensitive element and comprising components supported in leak-tight relation to each other including: 1. a cup-shaped casing having a back wall and a laterally extending shell wall enclosure peripherally connected thereto; and 2. a crystal secured to internally of said casing; c. plate means secured to internally of said casing at a location laterally intermediate said crystal and said back casing wall to substantially define a front compartment space disposed thereat extending toward said crystal and a rear compartment space disposed thereat extending toward said casing backwall; d. inlet port means extending through an outer wall of said casing defining an external to internal access to one of said compartments through which to receive oil internally of said housing for fill to a predetermined level at which to insure a controlled size air cushion openly exposed in contact with the oil fill within the housing; and e. trap means defined by said plate means and operatively effective to enable trapped position transfer of the air cushion from the space in said front compartment to substantially totally within said rear compartment space for the intended operable orientation of said housing.
Claim 3
Dependent Claim
156 words
a crystal secured to internally of said casing; c. plate means secured to internally of said casing at a location laterally intermediate said crystal and said back casing wall to substantially define a front compartment space disposed thereat extending toward said crystal and a rear compartment space disposed thereat extending toward said casing backwall; d. inlet port means extending through an outer wall of said casing defining an external to internal access to one of said compartments through which to receive oil internally of said housing for fill to a predetermined level at which to insure a controlled size air cushion openly exposed in contact with the oil fill within the housing; and e. trap means defined by said plate means and operatively effective to enable trapped position transfer of the air cushion from the space in said front compartment to substantially totally within said rear compartment space for the intended operable orientation of said housing.
Claim 4
Dependent Claim
156 words
a crystal secured to internally of said casing; c. plate means secured to internally of said casing at a location laterally intermediate said crystal and said back casing wall to substantially define a front compartment space disposed thereat extending toward said crystal and a rear compartment space disposed thereat extending toward said casing backwall; d. inlet port means extending through an outer wall of said casing defining an external to internal access to one of said compartments through which to receive oil internally of said housing for fill to a predetermined level at which to insure a controlled size air cushion openly exposed in contact with the oil fill within the housing; and e. trap means defined by said plate means and operatively effective to enable trapped position transfer of the air cushion from the space in said front compartment to substantially totally within said rear compartment space for the intended operable orientation of said housing.
Claim 5
Dependent Claim
61 words
A pressure gauge according to claim 1 in which said plate means includes a defined oil passage interconnecting said front and rear space compartments at predetermined radial locations thereon comprising said trap means, said oil passage being effective in response to a tilting orientation of said housing to enable air to be transferred from said front to said rear space compartment.
Claim 6
Dependent Claim
22 words
a chamfer on the housing wall thereat cooperating with said collar to define an encircling pocket therebetween containing said gasket means; and
Claim 7
Dependent Claim
22 words
a chamfer on the housing wall thereat cooperating with said collar to define an encircling pocket therebetween containing said gasket means; and
Claim 8
Dependent Claim
23 words
means to secure said collar and said chamfer in a relatively compression fit for maintaining said gasket means in compressed sealing relation thereat.
Claim 9
Dependent Claim
23 words
means to secure said collar and said chamfer in a relatively compression fit for maintaining said gasket means in compressed sealing relation thereat.
Claim 10
Dependent Claim
19 words
A pressure gauge according to claim 2 in which said plate means comprises the dial plate for said gauge.
Claim 11
Dependent Claim
20 words
A pressure gauge according to claim 2 in which said plate means is dish shaped peripherally diverging toward said crystal.
Claim 12
Dependent Claim
74 words
A pressure gauge according to claim 1 in which said pressure sensitive element comprises a Bourdon tube secured in said rear space compartment and said housing includes a leak-tight joint between said casing and the socket of said Bourdon tube, said joint being comprised of: a. resilient gasket means supported intervening between said socket and said casing thereat; and b. compression means acting to maintain said gasket means under compression for effecting said joint.
Claim 13
Dependent Claim
75 words
A pressure gauge according to claim 5 in which said compression means comprises: a. a collar on said socket angled outwardly therefrom in a direction facing the casing wall thereat; b. a chamfer on the casing wall thereat cooperating with said collar to define an encircling pocket therebetween containing said gasket; and c. means to secure said collar and said chamfer in a relatively compression fit for maintaining said gasket in compressed sealing relation thereat.
Claim 14
Dependent Claim
20 words
A pressure gauge according to claim 6 in which said collar is supported on said socket internally of said housing.
Claim 15
Dependent Claim
49 words
A pressure gauge according to claim 1 including a safety plug secured extending inward of said casing in operable communication with said air cushion, said safety plug being effective to vent said air cushion to atmosphere in the event of internal housing pressure in excess of a predetermined minimum.
Claim 16
Dependent Claim
22 words
A pressure gauge according to claim 8 in which said safety plug operably cooperates with the inlet port means of said casing.
Claim 17
Dependent Claim
33 words
A pressure gauge according to claim 8 in which said safety plug comprises a pliable air sealed bulbous member deformable in response to excess pressure for exposing said inlet port means to atmosphere.
Claim 18
Dependent Claim
164 words
A pressure gauge comprising in combination: a. a pressure sensitive element operably responsive to changes in pressure to which it is exposed; b. a sealed housing containing said pressure sensitive element and comprising components supported in leak-tight relation to each other; c. inlet port means in said housing in which to receive oil internally thereof for fill to a predetermined level at which to insure a controlled size air cushion openly exposed in contact with the oil fill within the housing; and d. a deformable safety plug comprised of an air sealed bulbous member secured within an opening defined in an outer wall of said housing and extending inwardly thereof in communication with said air cushion, said safety plug being operably effective to seal said opening at internal housing pressure less than a predetermined minimum and to deform from the sealing of said opening for venting said air cushion to atmosphere in the event of internal housing pressure in excess of said predetermined minimum.
Claim 19
Dependent Claim
164 words
A pressure gauge comprising in combination: a. a pressure sensitive element operably responsive to changes in pressure to which it is exposed; b. a sealed housing containing said pressure sensitive element and comprising components supported in leak-tight relation to each other; c. inlet port means in said housing in which to receive oil internally thereof for fill to a predetermined level at which to insure a controlled size air cushion openly exposed in contact with the oil fill within the housing; and d. a deformable safety plug comprised of an air sealed bulbous member secured within an opening defined in an outer wall of said housing and extending inwardly thereof in communication with said air cushion, said safety plug being operably effective to seal said opening at internal housing pressure less than a predetermined minimum and to deform from the sealing of said opening for venting said air cushion to atmosphere in the event of internal housing pressure in excess of said predetermined minimum.
Claim 20
Dependent Claim
30 words
A pressure gauge according to claim 11 in which said opening comprises said inlet port means and said safety plug cooperates with the inlet port means for operable effectiveness thereof.
Claim 21
Dependent Claim
135 words
A pressure gauge comprising in combination: a. a housing comprising components supported in leak-tight relation to each other; b. inlet port means in said housing in which to receive oil internally thereof for fill to a predetermined level at which to insure a controlled size air cushion openly exposed in contact with the oil fill within the housing; c. a Bourdon tube within said housing supported with its inlet socket extending outward of said housing through an opening defined in a wall thereof; and d. means forming a leak-tight joint between said housing and the socket of said Bourdon tube, said joint including resilient gasket means supported intervening between said socket and the housing thereat; and compression means acting to maintain said gasket means under compression for effecting said joint wherein said compression means comprises:
Claim 22
Dependent Claim
135 words
A pressure gauge comprising in combination: a. a housing comprising components supported in leak-tight relation to each other; b. inlet port means in said housing in which to receive oil internally thereof for fill to a predetermined level at which to insure a controlled size air cushion openly exposed in contact with the oil fill within the housing; c. a Bourdon tube within said housing supported with its inlet socket extending outward of said housing through an opening defined in a wall thereof; and d. means forming a leak-tight joint between said housing and the socket of said Bourdon tube, said joint including resilient gasket means supported intervening between said socket and the housing thereat; and compression means acting to maintain said gasket means under compression for effecting said joint wherein said compression means comprises:
Claim 23
Dependent Claim
20 words
A pressure gauge according to claim 13 in which said collar is supported on said socket internally of said housing.
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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) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |