Patent USRE28649E successfully refreshed from Google Patents.
USRE28649E
Expired / Lapsed
US
⏱️ 0.0 years remaining
ental handpiece control
Assignee: —
•
Filing: 1974-09-27
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Granted: 1975-12-16
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Expires: 1994-09-27
Abstract
Abstract A plurality of module control block assemblies individually control to a plurality of dental handpieces the supplies of drive air to the handpiece motors, and air and water coolants, and also supply drive air pressure to a gauge. The control block assemblies are clamped in series between distributing end blocks. A hanger assembly normally adapted to actuate a control block assembly when a handpiece is lifted from the hanger assembly has a manually operable lockout lever which prevents such actuation to permit changing of burrs of the handpiece or to inactivate that control block assembly.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:26
CPC Classifications
A; A61; A61C; A61C1/00; A61C1/0007
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
405 words
In a dental handpiece control, a solid control block having a drive air passage therethrough having an inlet and an outlet and a cooling fluid passage extending therethrough having an inlet and an outlet, a diaphragm sheet positioned on a first face of the control block, cover means secured to the outer face of the diaphragm sheet and the first face of the control block and having a pair of diaphragm actuating chambers therein, the drive air passage having a pair of ports intermediate the inlet and outlet thereof and opening into a portion of said first face opposite one of the diaphragm chambers and adapted to be closed by the diaphragm sheet, the cooling fluid passage having a pair of ports intermediate the inlet and outlet thereof and opening into (the other of) a portion of said first face opposite the diaphragm chambers and adapted to be closed by the diaphragm sheet, an air driven dental handpiece, air supply means supplying drive air under pressure to the inlet of the drive air passage, cooling fluid supply means supplying a cooling fluid under pressure to the inlet of the cooling fluid passage, air conduit means connecting the outlet of the drive air passage to the handpiece, cooling fluid conduit means connecting the outlet of the cooling fluid passage to the handpiece, second fluid supply means for supplying fluid under pressure to the diaphragm chambers, valve means in said second fluid supply means for controlling the supply of fluid to said diaphragm chambers, and hanger means serving to releasably support the handpiece and operatively connected to and controlling the valve means and operable by the weight of the handpiece (to close the valves and operable) when the handpiece is positioned on the hanGer means to open the (valves) valve means to permit fluid under pressure to flow to the diaphragm chambers thus to cause said diaphragm sheet to be pressed against said first face and prevent flow of air and cooling fluid through the respective passages therefor and operable when the handpiece is lifted therefrom (,) to close the valve means to shut off flow of fluid under pressure to the diaphragm chambers thus to permit movement of said diaphragm sheet away from said first face and permit flow of air cooling fluid through the respective passages therefor. (and means under the control of the hanger means for supplying fluid under pressure to the diaphragm chambers.)
Claim 2
Dependent Claim
405 words
In a dental handpiece control, a solid control block having a drive air passage therethrough having an inlet and an outlet and a cooling fluid passage extending therethrough having an inlet and an outlet, a diaphragm sheet positioned on a first face of the control block, cover means secured to the outer face of the diaphragm sheet and the first face of the control block and having a pair of diaphragm actuating chambers therein, the drive air passage having a pair of ports intermediate the inlet and outlet thereof and opening into a portion of said first face opposite one of the diaphragm chambers and adapted to be closed by the diaphragm sheet, the cooling fluid passage having a pair of ports intermediate the inlet and outlet thereof and opening into (the other of) a portion of said first face opposite the diaphragm chambers and adapted to be closed by the diaphragm sheet, an air driven dental handpiece, air supply means supplying drive air under pressure to the inlet of the drive air passage, cooling fluid supply means supplying a cooling fluid under pressure to the inlet of the cooling fluid passage, air conduit means connecting the outlet of the drive air passage to the handpiece, cooling fluid conduit means connecting the outlet of the cooling fluid passage to the handpiece, second fluid supply means for supplying fluid under pressure to the diaphragm chambers, valve means in said second fluid supply means for controlling the supply of fluid to said diaphragm chambers, and hanger means serving to releasably support the handpiece and operatively connected to and controlling the valve means and operable by the weight of the handpiece (to close the valves and operable) when the handpiece is positioned on the hanGer means to open the (valves) valve means to permit fluid under pressure to flow to the diaphragm chambers thus to cause said diaphragm sheet to be pressed against said first face and prevent flow of air and cooling fluid through the respective passages therefor and operable when the handpiece is lifted therefrom (,) to close the valve means to shut off flow of fluid under pressure to the diaphragm chambers thus to permit movement of said diaphragm sheet away from said first face and permit flow of air cooling fluid through the respective passages therefor. (and means under the control of the hanger means for supplying fluid under pressure to the diaphragm chambers.)
Claim 3
Dependent Claim
29 words
The dental handpiece control of claim 1 wherein the inlets open on a second face of the block and the outlets open on a third face of the block.
Claim 4
Dependent Claim
55 words
The dental handpiece control of claim 2 wherein the portions of the inlet passages on the inlet sides of the diaphragm sheet each is T-shaped with the stem of the T leading to the diaphragm sheet and the other portion leading from the second face of the block to a fourth face of the block.
Claim 5
Dependent Claim
98 words
The dental handpiece control of claim 1 wherein the hanger means includes a pivotal hanger adapted to hold the handpiece and pivotal downwardly to a storage position from the weight of the handpiece, means urging the hanger to an upper released position when the handpiece is out of the hanger, the valve means being operable by the hanger when in its storage position for supplying fluid under pressure to the diaphragm chambers and to exhaust the diaphragm chambers when the hanger is in its released position, and manually operable means for locking the hanger in its storage position.
Claim 6
Dependent Claim
28 words
The handpiece control of claim 4 wherein the manually operable means is a lockout lever having a cam portion adapted to hold the hanger in its storage position.
Claim 7
Dependent Claim
46 words
The dental handpiece of claim 5 wherein the hanger means includes a mounting bracket, a mounting block mounting the hanger pivotally and a screw securing the mounting block to the bracket and pivotally mounting the lockout lever, the mounting block serving to support the valve means.
Claim 8
Dependent Claim
95 words
In a dental handpiece control, a plurality of dental handpieces, a plurality of valving assemblies one for each handpiece, means mounting the valving assemblies together in a stack, the valving assemblies each including a plurality of fluid supply passages connected in series to corresponding fluid supply passages in the valving assemblies stacked adjacent thereto for supplying fluid to the valving assemblies, means for supplying a plurality of fluids to each of the valving assemblies, and a plurality of conduit means connecting each valving assembly to one of the handpieces for supplying fluids to the handpieces.
Claim 9
Dependent Claim
95 words
In a dental handpiece control, a plurality of dental handpieces, a plurality of valving assemblies one for each handpiece, means mounting the valving assemblies together in a stack, the valving assemblies each including a plurality of fluid supply passages connected in series to corresponding fluid supply passages in the valving assemblies stacked adjacent thereto for supplying fluid to the valving assemblies, means for supplying a plurality of fluids to each of the valving assemblies, and a plurality of conduit means connecting each valving assembly to one of the handpieces for supplying fluids to the handpieces.
Claim 10
Dependent Claim
42 words
The dental handpiece control of claim 7 wherein each valving assembly includes a block in which the supply passages are straight bores aligned with the bores in the immediately adjacent blocks, the blocks being mounted in face-to-face relationship with the bores aligned.
Claim 11
Dependent Claim
29 words
The dental handpiece of claim 8 wherein the blocks have shallow counterbores at the ends of the supply passages, and O-ring seals mounted in and compressed in the counterbores.
Claim 12
Dependent Claim
20 words
The dental handpiece of claim 8 including plug means positioned in the adjacent ends of two of the supply passages.
Claim 13
Dependent Claim
33 words
The dental handpiece control of claim 7 including an end block having L-shaped fluid passages therein having one end of each connected to the supply passages of the control blocks immediately adjacent thereto.
Claim 14
Dependent Claim
247 words
In a control, a control block having a first fluid passage having a bore extending from a first face to a port at a second face and a branch extending from the bore to a third face, the control block also having a second fluid passage having a drive air bore extending from tHe first face to the second face and a second fluid branch extending from the drive air bore to a port at the third face, the control block also including a first fluid outlet passage leading from a port at the third face near the port of the branch of the first fluid passage, the control block also including a second fluid outlet passage leading from a port at the third face near the port of the branch of the second fluid passage, flexible diaphragm means covering the ports in the third face and movable under pressure away from the ports, diaphragm chamber means defining a first diaphragm chamber opposite the ports of the fluid branch and the first fluid outlet passage and covering a first portion of the flexible diaphragm means and also defining a second diaphragm chamber opposite the ports of the branch of the second fluid passage and the second fluid outlet passage and covering a second portion of the flexible diaphragm means, and selectively operable means for supplying fluid under pressure to the diaphragm chambers to press the diaphragm means against the ports and close the ports from each other.
Claim 15
Dependent Claim
247 words
In a control, a control block having a first fluid passage having a bore extending from a first face to a port at a second face and a branch extending from the bore to a third face, the control block also having a second fluid passage having a drive air bore extending from tHe first face to the second face and a second fluid branch extending from the drive air bore to a port at the third face, the control block also including a first fluid outlet passage leading from a port at the third face near the port of the branch of the first fluid passage, the control block also including a second fluid outlet passage leading from a port at the third face near the port of the branch of the second fluid passage, flexible diaphragm means covering the ports in the third face and movable under pressure away from the ports, diaphragm chamber means defining a first diaphragm chamber opposite the ports of the fluid branch and the first fluid outlet passage and covering a first portion of the flexible diaphragm means and also defining a second diaphragm chamber opposite the ports of the branch of the second fluid passage and the second fluid outlet passage and covering a second portion of the flexible diaphragm means, and selectively operable means for supplying fluid under pressure to the diaphragm chambers to press the diaphragm means against the ports and close the ports from each other.
Claim 16
Dependent Claim
20 words
The control of claim 12 wherein the first face and the second face are at opposite sides of the block.
Claim 17
Dependent Claim
38 words
The control of claim 12 wherein the diaphragm chamber means is a cover adapted to cover the third face of the block and having recesses in the face thereof adjacent the diaphragm means and defining the diaphragm chambers.
Claim 18
Dependent Claim
27 words
The control of claim 14 wherein the cover is a block member having blind bores defining the recesses and including control fluid passage means to the bores.
Claim 19
Dependent Claim
35 words
The control of claim 15 wherein the control fluid passage means includes a main passage leading from one face of the block member and branch passages leading from the main passage to the blind bores.
Claim 20
Dependent Claim
133 words
In a control, a plurality of solid control blocks secured together in face-to-face relationship, each of the control blocks having first passages opening into passages in an immediately adjacent one of the control blocks, gasket means between the blocks sealing the areas around the junctures of the passages, a plurality of diaphragm means mounted on the blocks, the first passages having laterally extending branches having ports opening to the diaphragm means, and a plurality of additional passages in the blocks having ports adjacent the ports of the first passages and opening to the diaphragm means, each diaphragm means being adapted when in one position to press against the adjacent ports and close them from each other and wherein a second position to permit flow from one of the last-mentioned ports to the other.
Claim 21
Dependent Claim
133 words
In a control, a plurality of solid control blocks secured together in face-to-face relationship, each of the control blocks having first passages opening into passages in an immediately adjacent one of the control blocks, gasket means between the blocks sealing the areas around the junctures of the passages, a plurality of diaphragm means mounted on the blocks, the first passages having laterally extending branches having ports opening to the diaphragm means, and a plurality of additional passages in the blocks having ports adjacent the ports of the first passages and opening to the diaphragm means, each diaphragm means being adapted when in one position to press against the adjacent ports and close them from each other and wherein a second position to permit flow from one of the last-mentioned ports to the other.
Claim 22
Dependent Claim
21 words
The control of claim 20 including end blocks secured to the control blocks and including passages communicating with the first passages.
References Cited (Backward Citations)
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 |