US3854836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling machine for plaster casts or models
Assignee: IPCO Corp
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Filing: 1973-01-02
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Granted: 1974-12-17
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Expires: 1993-01-02
Abstract
Abstract A drilling machine for drilling holes in plaster casts or models has a frame which supports a stationary drilling platform having an opening therethrough. A motor housing is positoned below the drilling platform and is vertically movable between a rest and a drilling position on two laterally disposed top guide shafts and a centrally disposed bottom guide pin. A motor is mounted in the housing and supports a drill chuck and drill bit which penetrates through the opening to drill a hole in a cast or model on the drilling platform when the housing is moved upwardly to its drilling position. A U-shaped handle pivotally mounted on the frame and engageable with the housing permits manual raising of the housing. Alternately, a pneumatic system is described which includes a piston arrangement for raising the housing to the drilling position independently of the position of the handle. During pneumatic operation, the handle may be locked in its rest position. In each case, the handle is disposed in the region of the drilling platform so that the handle and the cast or model may be simultaneously gripped to secure the model during drilling. An overhanging locating light assembly is spaced over the opening of the drilling platform and vertically aligned therewith so that an indication- a lit portin where the light beam impinges on the model - is provided where the hole will be drilled. The beam of light from the locating light assembly can also be used for purposes of dental surveying.
Inventors
- 👤 B Weissman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:17
CPC Classifications
B; B23; B23B; B23B39/00; B23B39/003; B23B49/00; B23Q; B23Q17/00; B23Q17/24; Y; Y10; Y10T; Y10T408/00; Y10T408/18; Y10T408/21; Y10T408/55; Y10T408/564; Y10T408/5647; Y10T408/65; Y10T408/675; Y10T408/6757; Y10T408/6786
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
225 words
A drilling machine for drilling holes in a plaster cast comprising a frame having a stationary horizontal drilling platform, said drilling platform having an opening therethrough and a top surface adapted to support a cast which is positionable over said opening; drilling means mounted on said frame and positioned below said drilling platform and vertically movable between two spaced vertical positions, said drilling means being adapted to receive and support a drill bit, said drill means being arranged to maintain the drill bit below said top surface in one of said positions while passing the drill bit through said opening and above said top surface in the other of said spaced positions to thereby drill a hole in the plaster cast positioned on said top surface covering said opening; and actuating means for moving said drilling means from one of said positions to the other of said positions, said actuating means comprising a handle pivotally connected to said frame and engageable with said drilling means, said handle extending adjacent to and substantially along the length of the peripherY of said drilling platform, whereby both said handle and the plaster cast to be drilled can be simultaneously manually gripped with both hands and said drilling means can be moved by moving said handle while securing the position of the plaster cast during drilling of the latter.
Claim 2
Dependent Claim
225 words
A drilling machine for drilling holes in a plaster cast comprising a frame having a stationary horizontal drilling platform, said drilling platform having an opening therethrough and a top surface adapted to support a cast which is positionable over said opening; drilling means mounted on said frame and positioned below said drilling platform and vertically movable between two spaced vertical positions, said drilling means being adapted to receive and support a drill bit, said drill means being arranged to maintain the drill bit below said top surface in one of said positions while passing the drill bit through said opening and above said top surface in the other of said spaced positions to thereby drill a hole in the plaster cast positioned on said top surface covering said opening; and actuating means for moving said drilling means from one of said positions to the other of said positions, said actuating means comprising a handle pivotally connected to said frame and engageable with said drilling means, said handle extending adjacent to and substantially along the length of the peripherY of said drilling platform, whereby both said handle and the plaster cast to be drilled can be simultaneously manually gripped with both hands and said drilling means can be moved by moving said handle while securing the position of the plaster cast during drilling of the latter.
Claim 3
Dependent Claim
24 words
A drilling machine as defined in claim 1, wherein said handle extends adjacent at least one half of the periphery of said drilling platform.
Claim 4
Dependent Claim
116 words
A drilling machine as defined in claim 1, wherein said handle is generally U-shaped and has two parallel members and one transverse member joining said two parallel members, each parallel member having a pivot arm portion and a moment arm portion, each pivot arm portion including first pivoting means for pivotally connecting said pivot arm portions to said frames, second pivoting means being provided intermediate said pivot arm and moment arm portions, said second pivoting means cooperating with said drilling means, whereby pivoting of said handle about said first pivoting means causes engagement of said handle with said second pivoting means and the latter pivots relative to the former as said drilling means are raised upwardly.
Claim 5
Dependent Claim
90 words
A drilling machine as defined in claim 3, further including stop means connected to said frame and disposed adjacent said handle, said stop means being movable between free and locking positions, said handle being pivotable about said first pivoting means in said free position of said stop means, said stop means being in abutment against at least a portion of said handle in said locking position to thereby prevent pivoting of said handle about said first pivoting means and drilling of the plaster cast by manual movement of said handle.
Claim 6
Dependent Claim
59 words
A drilling machine as defined in claim 4, wherein said stop means comprises first and second stops each respectively disposed adjacent another pivot arm portion of said handle, and link means cooperating with said first and second stops for moving one stop into either one of said free and locking positions simultaneously with such movement of said other stop.
Claim 7
Dependent Claim
147 words
A drilling machine as defined in claim 3, wherein said drilling means comprises a motor housing, and a motor mounted in said housing, guide means cooperating with said frame and said housing for limiting the movement of the latter in vertical directions between said two positions, said first pivoting means comprising an aperture at the free end of each pivot arm and pin means fixed in said frame and passing through said apertures, said second pivoting means comprising depressions on inward surfaces of each parallel member facing the other respective member, and pivot standoffs projecting from said housing and arranged to extend into said depressions, said depressions each defining abutting surfaces adapted to engage said pivot standoffs when said handle is pivoted about said first pivoting means and thereby urge said housing to move in a vertical direction corresponding to the vertical movement of said pivot standoffs.
Claim 8
Dependent Claim
93 words
A drilling machine as defined in claim 1, whereby said drilling means comprises a motor housing, and a motor mounted in said housing, said housing having pivots standoffs on opposite sides of said housing adjacent said handle, said handle having recesses adapted to receive said respective pivot standoffs, said recesses having dimensions greater than those of said pivot standoffs and having abutting surfaces which define the extent of said recesses, whereby said pivot standoffs and said housing can move limited vertical distances prior to said standoffs coming into abutment with said abutting surfaces.
Claim 9
Dependent Claim
43 words
A drilling machine as defined in claim 7, whereby said recesses have dimensions which permit said housing to move vertically to the other of said spaced positions without movement of said handle and without abutment of said pivot standoffs against said abutting surfaces.
Claim 10
Dependent Claim
29 words
A drilling machine as defined in claim 8, further including hydraulic means for moving said housing to the other of saId positions independently of the movement of said handle.
Claim 11
Dependent Claim
61 words
A drilling machine as defined in claim 1, wherein said drilling means comprises a motor housing, and further comprising adjustable depth limiting means cooperating with said housing and said drilling platform for adjustably limiting the movement of said housing in the direction towards said drilling platform, whereby the depth of the holes drilled in the plaster cast can be closely controlled.
Claim 12
Dependent Claim
66 words
A drilling machine as defined in claim 10, wherein said depth limiting means comprises a screw-threaded stop meshingly mounted on a portion of said housing facing said drilling platform and having an extended portion which is engageable with the said drilling platform and projects from said housing portion variable distances in dependence on the extent of meshing engagement of said depth limiting means and said housing.
Claim 13
Dependent Claim
84 words
A drilling machine as defined in claim 1, further comprising a locating light spaced from and vertically aligned with said opening, said locating light having means to generate a beam of light directed normally to said top surface and through the center of said opening, whereby said beam of light impinging on a portion of the cast provides an indication that a hole will be drilled in the lit portion when said drilling means moves from one to the other of said spaced positions.
Claim 14
Dependent Claim
89 words
A drilling machine as defined in claim 1, wherein said drilling means comprises a housing, and further comprising guide means for vertically guiding said housing, said guide means comprising two downwardly extending guide shafts extending from said drilling platform to each side of said opening, said corresponding holes in the top of said housing adapted to receive respective ones of said guide shafts, and an upwardly extending guide pin extending from said frame and a corresponding hole in the bottom of said housing adapted to receive said guide pin.
References Cited (Backward Citations)
US1148640A
Cited
US3120136A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |