US4291701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure transducing and methods and apparatus for filling a cavity
Assignee: VHC Inc FORMERLY KNOWN AS VARO Inc
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Filing: 1978-07-11
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Granted: 1981-09-29
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Expires: 1998-07-11
Abstract
Abstract Methods and apparatus for filling a cavity with a liquid from a hypodermic needle through a port provide the port with a straight passage leading to the cavity either directly or through a laterally offset further passage. The needle is partially inserted into the straight passage of the port. The partially inserted needle is stopped by engagement inside the port short of the cavity while an overflow and gas escape path is provided through the straight passage along the outside of the stopped partially inserted needle.
Inventors
- 👤 Ronald Bowman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:37
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/02; A61B5/021; A61B5/0215
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
137 words
A method of filling a cavity and a port extending for a distance from said cavity with a liquid through a hypodermic needle longer than said distance, while permitting gas and excess liquid to escape, comprising in combination the steps of: providing said port with a straight passage leading to said cavity; partially inserting said needle into said straight passage of said port; stopping said partially inserted needle by engagement inside said port short of said cavity while providing an overflow and gas escape path throughout said straight passage along the outside of said stopped partially inserted needle; injecting liquid through said needle into said cavity while preserving said overflow and gas escape path; and withdrawing said needle from said port while continuing to inject liquid through said needle until said port is filled with said liquid.
Claim 2
Independent Claim
137 words
A method of filling a cavity and a port extending for a distance from said cavity with a liquid through a hypodermic needle longer than said distance, while permitting gas and excess liquid to escape, comprising in combination the steps of: providing said port with a straight passage leading to said cavity; partially inserting said needle into said straight passage of said port; stopping said partially inserted needle by engagement inside said port short of said cavity while providing an overflow and gas escape path throughout said straight passage along the outside of said stopped partially inserted needle; injecting liquid through said needle into said cavity while preserving said overflow and gas escape path; and withdrawing said needle from said port while continuing to inject liquid through said needle until said port is filled with said liquid.
Claim 3
Dependent Claim
72 words
A method as claimed in claim 1, wherein: said straight passage is provided with a taper extending in the direction of said cavity and having a minor diameter smaller than the outside diameter of said hypodermic needle and with a straight path extending along said taper passage; said partially inserted needle is stopped by engagement with a wall portion of said straight passage due to said taper short of said minor diameter.
Claim 4
Dependent Claim
55 words
A method as claimed in claim 1, wherein: said straight passage is provided with a fluted taper having a minor diameter smaller than the outside diameter of said hypodermic needle; and said partially inserted needle is stopped by engagement with wall portions of said straight passage due to said taper short of said minor diameter.
Claim 5
Dependent Claim
37 words
A method as claimed in claim 1, wherein: said straight passage is provided with a partial obstruction permitting passage of liquid from said port to said cavity but stopping said partially inserted needle short of said cavity.
Claim 6
Independent Claim
165 words
A method of filling a cavity and a port extending for a distance from said cavity with a liquid through a hypodermic needle longer than said distance, while permitting gas and excess liquid to escape, comprising in combination the steps of: providing said port with a straight first passage having a larger diameter than said needle and a bottom portion spaced from said cavity, and with a second passage extending between said first passage and said cavity in the same direction as said first passage; partially inserting said needle into said first passage; stopping said partially inserted needle with said bottom portion while providing an overflow and gas escape path through said first passage along the outside of said stopped partially inserted needle; injecting liquid through said needle and second passage into said cavity while preserving said overflow and gas escape path; and withdrawing said needle from said port while continuing to inject liquid through said needle until said port is filled with said liquid.
Claim 7
Independent Claim
165 words
A method of filling a cavity and a port extending for a distance from said cavity with a liquid through a hypodermic needle longer than said distance, while permitting gas and excess liquid to escape, comprising in combination the steps of: providing said port with a straight first passage having a larger diameter than said needle and a bottom portion spaced from said cavity, and with a second passage extending between said first passage and said cavity in the same direction as said first passage; partially inserting said needle into said first passage; stopping said partially inserted needle with said bottom portion while providing an overflow and gas escape path through said first passage along the outside of said stopped partially inserted needle; injecting liquid through said needle and second passage into said cavity while preserving said overflow and gas escape path; and withdrawing said needle from said port while continuing to inject liquid through said needle until said port is filled with said liquid.
Claim 8
Dependent Claim
18 words
A method as claimed in claim 5, wherein: said second passage is laterally offset from said first passage.
Claim 9
Independent Claim
74 words
An apparatus having a port and a cavity for receiving a liquid from a hypodermic needle through said port, comprising in combination: a straight passage in said port leading to said cavity for receiving part of said needle; means in said port for engaging said needle inside said port and stopping said needle short of said cavity; and means in said port for providing an overflow and gas escape path throughout said straight passage.
Claim 10
Independent Claim
74 words
An apparatus having a port and a cavity for receiving a liquid from a hypodermic needle through said port, comprising in combination: a straight passage in said port leading to said cavity for receiving part of said needle; means in said port for engaging said needle inside said port and stopping said needle short of said cavity; and means in said port for providing an overflow and gas escape path throughout said straight passage.
Claim 11
Dependent Claim
38 words
An apparatus as claimed in claim 7, wherein: said needle engaging means include a partial obstruction in said port permitting passage of said liquid from said port to said cavity but stopping said needle short of said cavity.
Claim 12
Independent Claim
66 words
An apparatus having a port and a cavity for receiving a liquid from a hypodermic needle through said port, comprising: a tapered passage in said port extending in the direction of said cavity, having a minor diameter smaller than the outside diameter of said hypodermic needle whereby said needle is stopped short of said cavity, and having an overflow and gas escape path throughout said port.
Claim 13
Independent Claim
66 words
An apparatus having a port and a cavity for receiving a liquid from a hypodermic needle through said port, comprising: a tapered passage in said port extending in the direction of said cavity, having a minor diameter smaller than the outside diameter of said hypodermic needle whereby said needle is stopped short of said cavity, and having an overflow and gas escape path throughout said port.
Claim 14
Dependent Claim
13 words
An apparatus as claimed in claim 9, wherein: said tapered passage is fluted.
Claim 15
Independent Claim
72 words
An apparatus having a port and a cavity for receiving a liquid from a hypodermic needle through said port, comprising in combination: a straight first passage in said port having a larger diameter than said needle and a bottom portion spaced from said cavity for stopping said needle short of said cavity; and a second passage extending between said first passage and said cavity in the same direction as said first passage.
Claim 16
Independent Claim
72 words
An apparatus having a port and a cavity for receiving a liquid from a hypodermic needle through said port, comprising in combination: a straight first passage in said port having a larger diameter than said needle and a bottom portion spaced from said cavity for stopping said needle short of said cavity; and a second passage extending between said first passage and said cavity in the same direction as said first passage.
Claim 17
Dependent Claim
18 words
An apparatus as claimed in claim 11, wherein: said second passage is laterally offset from said first passage.
Claim 18
Dependent Claim
99 words
A dome for a pressure transducer having a port, a cavity for receiving a liquid from a hypodermic needle through said port, and an opening for a transduction of pressure variations relative to said cavity, comprising in combination: an isolation membrane closing said opening for said liquid; a straight passage in said port leading to said cavity for receiving part of said needle; means in said port for engaging said needle inside said port and stopping said needle short of said cavity; and means in said port for providing an overflow and gas escape path throughout said straight passage.
Claim 19
Dependent Claim
99 words
A dome for a pressure transducer having a port, a cavity for receiving a liquid from a hypodermic needle through said port, and an opening for a transduction of pressure variations relative to said cavity, comprising in combination: an isolation membrane closing said opening for said liquid; a straight passage in said port leading to said cavity for receiving part of said needle; means in said port for engaging said needle inside said port and stopping said needle short of said cavity; and means in said port for providing an overflow and gas escape path throughout said straight passage.
Claim 20
Dependent Claim
38 words
An apparatus as claimed in claim 13, wherein: said needle engaging means include a partial obstruction in said port permitting passage of said liquid from said port to said cavity but stopping said needle short of said cavity.
Claim 21
Dependent Claim
93 words
A dome for a pressure transducer having a port, a cavity for receiving a liquid from a hypodermic needle through said port, and an opening for a transduction of pressure variations relative to said cavity, comprising in combination: an isolation membrane closing said opening for said liquid; a tapered passage in said port extending in the direction of said cavity, having a minor diameter smaller than the outside diameter of said hypodermic needle whereby said needle is stopped short of said cavity, and having an overflow and gas escape path throughout said port.
Claim 22
Dependent Claim
93 words
A dome for a pressure transducer having a port, a cavity for receiving a liquid from a hypodermic needle through said port, and an opening for a transduction of pressure variations relative to said cavity, comprising in combination: an isolation membrane closing said opening for said liquid; a tapered passage in said port extending in the direction of said cavity, having a minor diameter smaller than the outside diameter of said hypodermic needle whereby said needle is stopped short of said cavity, and having an overflow and gas escape path throughout said port.
Claim 23
Dependent Claim
13 words
An apparatus as claimed in claim 15, wherein: said tapered passage is fluted.
Claim 24
Dependent Claim
97 words
A dome for a pressure transducer having a port, a cavity for receiving a liquid from a hypodermic needle through said port, and an opening for a transduction of pressure variations relative to said cavity, comprising in combination: an isolation membrane closing said opening for said liquid; a straight first passage in said port having a larger diameter than said needle and a bottom portion spaced from said cavity for stopping said needle short of said cavity; and a second passage extending between said first passage and said cavity in the same direction as said first passage.
Claim 25
Dependent Claim
97 words
A dome for a pressure transducer having a port, a cavity for receiving a liquid from a hypodermic needle through said port, and an opening for a transduction of pressure variations relative to said cavity, comprising in combination: an isolation membrane closing said opening for said liquid; a straight first passage in said port having a larger diameter than said needle and a bottom portion spaced from said cavity for stopping said needle short of said cavity; and a second passage extending between said first passage and said cavity in the same direction as said first passage.
Claim 26
Dependent Claim
18 words
An apparatus as claimed in claim 17, wherein: said second passage is laterally offset from said first passage.
Claim 27
Dependent Claim
28 words
A method as claimed in claim 4, wherein: said partial obstruction is centered by ribs leaving apertures for said passage of liquid from said port to said cavity.
Claim 28
Dependent Claim
33 words
An apparatus as claimed in claim 13, wherein: said overflow and gas escape path providing means include means for providing said overflow and gas escape path along the outside of said stopped needle.
Claim 29
Dependent Claim
31 words
An apparatus as claimed in claim 14, including: a second passage extending between said straight passage and said cavity past said partial obstruction in the same direction as said straight passage.
Claim 30
Dependent Claim
23 words
An apparatus as claimed in claim 14, wherein: said partial obstruction is centered by ribs leaving passages for said liquid to said cavity.
Claim 31
Dependent Claim
31 words
An apparatus as claimed in claim 15, wherein: said tapered passage has projecting ribs providing corresponding overflow and gas escape passages throughout said port along an outside of said stopped needle.
Claim 32
Independent Claim
92 words
An apparatus having a port and a cavity for receiving a liquid through said port from a hypodermic needle having an outside, comprising in combination: a straight passage in said port leading to said cavity for receiving part of said needle; means in said port for engaging said needle inside said port and stopping said needle short of said cavity upon partial insertion of said needle; and means in said port for providing an overflow and gas escape path throughout said straight passage along the outside of the stopped, partially inserted needle.
Claim 33
Independent Claim
92 words
An apparatus having a port and a cavity for receiving a liquid through said port from a hypodermic needle having an outside, comprising in combination: a straight passage in said port leading to said cavity for receiving part of said needle; means in said port for engaging said needle inside said port and stopping said needle short of said cavity upon partial insertion of said needle; and means in said port for providing an overflow and gas escape path throughout said straight passage along the outside of the stopped, partially inserted needle.
Claim 34
Dependent Claim
38 words
An apparatus as claimed in claim 24, wherein: said needle engaging means include a partial obstruction in said port permitting passage of said liquid from said port to said cavity but stopping said needle short of said cavity.
Claim 35
Dependent Claim
31 words
An apparatus as claimed in claim 25, including: a second passage extending between said straight passage and said cavity past said partial obstruction in the same direction as said straight passage.
Claim 36
Dependent Claim
24 words
An apparatus as claimed in claim 24, wherein: said partial obstruction is centered by radial ribs leaving passages for said liquid to said cavity.
Claim 37
Independent Claim
81 words
An apparatus having a port and a cavity for receiving a liquid from a hypodermic needle through said port, comprising: a tapered passage in said port extending in the direction of said cavity, having a minor diameter smaller than the outside diameter of said hypodermic needle whereby said needle is stopped short of said cavity, and having projecting ribs parallel to said tapered passage providing corresponding overflow and gas escape passages throughout said port along the outside of said stopped needle.
Claim 38
Independent Claim
81 words
An apparatus having a port and a cavity for receiving a liquid from a hypodermic needle through said port, comprising: a tapered passage in said port extending in the direction of said cavity, having a minor diameter smaller than the outside diameter of said hypodermic needle whereby said needle is stopped short of said cavity, and having projecting ribs parallel to said tapered passage providing corresponding overflow and gas escape passages throughout said port along the outside of said stopped needle.
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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) | 1984-09-28 | 1985-03-30 | 1985-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-28 | 1989-03-30 | 1989-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-28 | 1993-03-30 | 1993-09-29 | $7700.00 | Window Closed / Lapsed |