US3969936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inflation valve gauge
Assignee: Circor Aerospace Inc
•
Filing: 1975-05-14
•
Granted: 1976-07-20
•
Expires: 1995-05-14
Abstract
Abstract An inflation valve gauge including a tubular stem having an inner end connected to a pressurized chamber such as formed by a tire, and an outer end provided with an inflation valve; the stem being surrounded by a special, helically wound Bourdon type pressure gauge tube, having an axially inner end penetrating a wall of the tubular stem and an outer end having a pointer overlying an axially directed scale plate; the gauge tube being surrounded by a sleeve which supports the scale plate and is joined to the stem axially inward from the gauge tube; the convolutions of the gauge tube being disposed in close proximity, the confronting wall surfaces of the stem and sleeve being in close proximity to the convolutions of the gauge tube to restrain the gauge tube against extreme mechanical forces tending to damage the gauge tube.
Inventors
- 👤 James E. Lindsay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:06
CPC Classifications
B; B60; B60C; B60C23/00; B60C23/02; B60C23/04; B60C23/0491; B60C23/0496
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
211 words
An inflation valve gauge for connection to a pressurized means subject to high mechanical stress, said gauge comprising: a. a tubular stem connected to the pressurized means; b. an inflation valve sealing the tubular stem; c. a pressure gauge tube wrapped about the stem in the form of a cylindrical helix in close proximity thereto but normally spaced therefrom a distance of the order of 0.005 to 0.010 inches and with the coils thereof normally spaced apart about 0.003 inches; d. the gauge tube including a fixed end penetrating the stem to permit entrance of a pressure fluid into the gauge tube and a free end movable in response to pressure of the pressure fluid in the gauge tube to monitor the pressure thereof; e. and a sleeve surrounding the gauge tube in close proximity thereto but normally spaced therefrom a distance of the order of 0.015 to 0.020 inches; whereby the spacing between said gauge tube and said stem and sleeve is such that said gauge tube is elastically movable under mechanical stress into supported contact with the confronting surfaces of the tube and sleeve whereby, upon release of the mechanical stress, the gauge tube returns to its initial state to again monitor the pressure of the pressure fluid therein.
Claim 2
Dependent Claim
211 words
An inflation valve gauge for connection to a pressurized means subject to high mechanical stress, said gauge comprising: a. a tubular stem connected to the pressurized means; b. an inflation valve sealing the tubular stem; c. a pressure gauge tube wrapped about the stem in the form of a cylindrical helix in close proximity thereto but normally spaced therefrom a distance of the order of 0.005 to 0.010 inches and with the coils thereof normally spaced apart about 0.003 inches; d. the gauge tube including a fixed end penetrating the stem to permit entrance of a pressure fluid into the gauge tube and a free end movable in response to pressure of the pressure fluid in the gauge tube to monitor the pressure thereof; e. and a sleeve surrounding the gauge tube in close proximity thereto but normally spaced therefrom a distance of the order of 0.015 to 0.020 inches; whereby the spacing between said gauge tube and said stem and sleeve is such that said gauge tube is elastically movable under mechanical stress into supported contact with the confronting surfaces of the tube and sleeve whereby, upon release of the mechanical stress, the gauge tube returns to its initial state to again monitor the pressure of the pressure fluid therein.
Claim 3
Dependent Claim
48 words
An inflation valve gauge, as defined in claim 1, wherein: a. the fixed end of the gauge tube protrudes into the bore of the tubular stem and is shaped to produce a reduce fluid pressure in the gauge tube during flow of pressure fluid into the pressurized means.
Claim 4
Dependent Claim
49 words
An inflation valve gauge, as defined in claim 1, wherein: a. the gauge tube includes a fixed end of circular cross section having increased wall thickness to provide axial support therefore and confined between the confronting walls to withstand high axial force to a direction toward the fixed end.
Claim 5
Dependent Claim
184 words
An inflation valve gauge for connection to a pressurized means subject to high mechanical stress, said gauge comprising: a. a body member having a cylindrical bore and a flanged end; b. a tubular stem within the bore forming with the body member an annular chamber extending from the flanged end, the tubular stem protruding from the flanged end; c. means for connecting the end of the body member opposite from the flanged end to the pressurized means; d. means in said flanged end forming a disk chamber receiving an axially directed scale disk and a transparent cover through which the tubular stem protrudes; e. an inflation valve within the protruding end of the tubular stem; f. a sealing cap enclosing the protruding end of the tubular stem; g. a gauge tube coiled in the annular chamber in the form of a cylindrical helix spaced from said stem a distance of the order of from 0.005 to 0.010 inches and with its coils normally spaced axially about 0.003 inches and spaced from said body member a distance of the order of 0.015 to 0.020 inches.
Claim 6
Dependent Claim
184 words
An inflation valve gauge for connection to a pressurized means subject to high mechanical stress, said gauge comprising: a. a body member having a cylindrical bore and a flanged end; b. a tubular stem within the bore forming with the body member an annular chamber extending from the flanged end, the tubular stem protruding from the flanged end; c. means for connecting the end of the body member opposite from the flanged end to the pressurized means; d. means in said flanged end forming a disk chamber receiving an axially directed scale disk and a transparent cover through which the tubular stem protrudes; e. an inflation valve within the protruding end of the tubular stem; f. a sealing cap enclosing the protruding end of the tubular stem; g. a gauge tube coiled in the annular chamber in the form of a cylindrical helix spaced from said stem a distance of the order of from 0.005 to 0.010 inches and with its coils normally spaced axially about 0.003 inches and spaced from said body member a distance of the order of 0.015 to 0.020 inches.
Claim 7
Dependent Claim
59 words
An inflation valve gauge as defined in claim 4, wherein a. the fixed end of the gauge tube is provided with walls of increased thickness and a bore of reduced diameter to increase the strength of the gauge tube at the fixed end and to minimize the bleed off rate through the gauge tube in the event of breakage.
References Cited (Backward Citations)
US1061472A
Cited
US1893222A
Cited
US1855088A
Cited
US1894153A
Cited
US3213688A
Cited
US3810390A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-20 | 1980-01-19 | 1980-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-20 | 1984-01-19 | 1984-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-20 | 1988-01-19 | 1988-07-20 | $7700.00 | Window Closed / Lapsed |