US3640304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insertable valve assembly
Assignee: Individual
•
Filing: 1970-05-01
•
Granted: 1972-02-08
•
Expires: 1990-05-01
Abstract
Abstract A valve assembly, is shown and described, as operatively disposed in a dental syringe. Resilient ring means are disposed about the assembly to frictionally engage the adjacent structure housing the valve assembly. A sleeve of the valve assembly defines an inner chamber for reception of the pressurized media being controlled with a valve core being moveable within the sleeve for release of the pressurized fluid or air for ultimate discharge.
Inventors
- 👤 Marvin L Fox
- 👤 James R Parry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:16
CPC Classifications
A; A61; A61C; A61C17/00; A61C17/02; A61C17/0217; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/6011; Y10T137/7504
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
197 words
A valve assembly for placement into and extraction from a bore within supporting structure without the aid of tools, the bore in communication with passageways in the supporting structure serving said valve assembly, the valve assembly comprising, a sleeve for inserted placement into the bore within the supporting structure, said sleeve defining an internal chamber and having air passage means admitting pressure into said chamber, resilient means disposed about said sleeve and in compression against the wall of the bore in the supporting structure to frictionally retain said sleeve in an operative position within the bore and while additionally serving to restrict the escapement of pressure therepast lengthwise of the sleeve exterior, a valve core normally sealing the ends of said chamber and adapted for reciprocal movement within the sleeve whereupon core movement in one direction will put said chamber in communication with one of the passageways in the supporting structure, said valve core extending outwardly of the sleeve and supporting structure for finger actuation, and means carried by said valve core engageable with said sleeve permitting outward extraction of the sleeve and extraction of the entire valve assembly from the supporting structure by fingertip effort alone.
Claim 2
Dependent Claim
197 words
A valve assembly for placement into and extraction from a bore within supporting structure without the aid of tools, the bore in communication with passageways in the supporting structure serving said valve assembly, the valve assembly comprising, a sleeve for inserted placement into the bore within the supporting structure, said sleeve defining an internal chamber and having air passage means admitting pressure into said chamber, resilient means disposed about said sleeve and in compression against the wall of the bore in the supporting structure to frictionally retain said sleeve in an operative position within the bore and while additionally serving to restrict the escapement of pressure therepast lengthwise of the sleeve exterior, a valve core normally sealing the ends of said chamber and adapted for reciprocal movement within the sleeve whereupon core movement in one direction will put said chamber in communication with one of the passageways in the supporting structure, said valve core extending outwardly of the sleeve and supporting structure for finger actuation, and means carried by said valve core engageable with said sleeve permitting outward extraction of the sleeve and extraction of the entire valve assembly from the supporting structure by fingertip effort alone.
Claim 3
Dependent Claim
42 words
The valve assembly claimed in claim 1 wherein said resilient means comprises a pair of O-rings oppositely disposed adjacent ends of the sleeve to define a sealed area about said sleeve in communication with one of the passageways in the supporting structure.
Claim 4
Dependent Claim
25 words
The valve assembly as claimed in claim 2 wherein said O-rings are retained in place on said sleeve by annular means integral with the sleeve.
Claim 5
Dependent Claim
32 words
A valve assembly as claimed in claim 1 wherein the last mentioned means comprises a ring contactable with the innermost end of the sleeve to limit valve core travel during valve operation.
Claim 6
Dependent Claim
52 words
A valve assembly as claimed in claim 1 wherein said valve core carries first and second O-rings slidable within the internal chamber defined by said sleeve with said chamber normally being closed thereby, one of said last mentioned O-rings being positionable outwardly of the innermost end of the sleeve during valve actuation.
Claim 7
Dependent Claim
65 words
A valve assembly as claimed in claim 5 wherein the other of said O-rings is adapted for independent sliding movement relative to both said valve core and said sleeve whereby upon return movement of the valve core drag exerted on the valve core by the last mentioned O-ring is lessened allowing the valve core to return to a normal close position in an unimpeded manner.
References Cited (Backward Citations)
US1827528A
Cited
US2764324A
Cited
US2922432A
Cited
US3148700A
Cited
US3239192A
Cited
US3380081A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |