Patent US3880047A successfully refreshed from Google Patents.
US3880047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chip removal and hold-down device for lateral movement routers
Assignee: DOSIER PAUL ASS Inc
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Filing: 1973-03-22
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Granted: 1975-04-29
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Expires: 1993-03-22
Abstract
Abstract A hold-down and chip removal device for attachment to router machines. The device has a vacuum housing which attaches around the spindle housing of a router and surrounds the cutter locked in the spindle. The housing has an aperture in its lower surface through which the cutter extends. Attached around the periphery of this aperture is a hold-down and sealing brush. The vacuum housing is connected to a vacuum source so that, when the cutter is in the operational mode, the brush contacts the workpiece and establishes a vacuum chamber within the housing to promote chip removal. The brush also holds down the workpiece which is only laterally registered on the working surface of the machine.
Inventors
- 👤 Paul A Dosier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:49
CPC Classifications
B; B23; B23Q; B23Q3/00; B23Q3/02; B23Q3/06; B23Q3/069; B23Q11/00; B23Q11/0042; B23Q11/0046; Y; Y10; Y10T; Y10T408/00; Y10T408/44; Y10T408/45; Y10T408/453; Y10T409/00; Y10T409/30; Y10T409/30392; Y10T409/304088; Y10T83/00; Y10T83/202; Y10T83/2066; Y10T83/207; Y10T83/606; Y10T83/748
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
209 words
A chip removal and hold-down attachment for use with a lateral movement router machine adapted for routing lightweight workpieces such as printed circuit boards, said machine having a spindle for mounting a cutting tool, said spindle rotatably mounted on a spindle housing, said spindle housing mounted for reciprocation on said router machine, said machine including a work surface for supporting said lightweight workpieces and registration means for locating said workpieces on said work surface, said attachment comprising: a vacuum housing mounted on said router machine for reciprocation with said spindle housing and surrounding said cutting tool, said vacuum housing connected to a vacuum source for removal of chips produced by the router operation on a workpiece; means located adjacent the lower surface of said vacuum housing for holding down said workpiece during said lateral movement router operation and for partially sealing said vacuum housing against said workpiece to provide a partial vacuum within said vacuum housing for the evacuation of said chips, said holding down means being the sole means for holding said workpiece down on said work surface during routing; and means for prohibiting said vacuum source from lifting said lightweight workpieces from said registration means prior to contact of said means for holding down with said workpiece.
Claim 2
Dependent Claim
209 words
A chip removal and hold-down attachment for use with a lateral movement router machine adapted for routing lightweight workpieces such as printed circuit boards, said machine having a spindle for mounting a cutting tool, said spindle rotatably mounted on a spindle housing, said spindle housing mounted for reciprocation on said router machine, said machine including a work surface for supporting said lightweight workpieces and registration means for locating said workpieces on said work surface, said attachment comprising: a vacuum housing mounted on said router machine for reciprocation with said spindle housing and surrounding said cutting tool, said vacuum housing connected to a vacuum source for removal of chips produced by the router operation on a workpiece; means located adjacent the lower surface of said vacuum housing for holding down said workpiece during said lateral movement router operation and for partially sealing said vacuum housing against said workpiece to provide a partial vacuum within said vacuum housing for the evacuation of said chips, said holding down means being the sole means for holding said workpiece down on said work surface during routing; and means for prohibiting said vacuum source from lifting said lightweight workpieces from said registration means prior to contact of said means for holding down with said workpiece.
Claim 3
Dependent Claim
50 words
A chip removal and hold-down attachment as defined in claim 1 wherein said means for holding down said workpiece and for partially sealing said vacuum housing against said workpiece comprises a set of bristles having one end secured to said vacuum housing and the other end extending toward said workpiece.
Claim 4
Dependent Claim
44 words
A chip removal and hold-down attachment as defined in claim 2 wherein said set of bristles has the other end attached to a brush head removably connected to said vacuum housing and extending around the periphery of said lower surface of said vacuum housing.
Claim 5
Dependent Claim
50 words
A chip removal and hold-down attachment as defined in claim 2 wherein said set of bristles are flexible, so that when said cutting tool is in contact with said workpiece and when said cutting tool moves laterally, said brush will maintain said partial seal between said housing and said workpiece.
Claim 6
Dependent Claim
50 words
A chip removal and hold-down attachment as defined in claim 1 wherein said means for holding down and for partially sealing is sufficiently flexible and non-abrasive to avoid surface damage to said workpiece when said cutting tool is in contact with said workpiece and when said cutting tool moves laterally.
Claim 7
Dependent Claim
46 words
A chip removal and hold-down attachment as defined in claim 1 wherein said means for holding down and for partially sealing is sufficiently flexible to allow the distance between said vacuum housing and said workpiece to vary during said routing operation without destroying said partial seal.
Claim 8
Dependent Claim
177 words
A protective shield attachment for use with lateral movement printed circuit board router machines having a spindle housing for mounting a rotating, cutting tool supporting spindle, said attachment comprising: a vacuum source; a vacuum housing connected to the lower end of said spindle housing of said router and surrounding said cutting tool in said spindle, said vacuum housing connected to said vacuum source and having an aperture in its lower surface through which said cutting tool extends for contact with the printed circuit board, said contact between said cutting tool and said printed circuit board producing chips wHich are contained by said vacuum housing; means located around said aperture for holding down said printed circuit board during said lateral movement and for partially sealing said aperture against said workpiece to establish a vacuum chamber within said vacuum housing for removal of said chips; and means for prohibiting operation of said vacuum source exceptt when said holding down means is in contact with said printed circuit board to prohibit said vacuum source from lifting said printed circuit board.
Claim 9
Dependent Claim
177 words
A protective shield attachment for use with lateral movement printed circuit board router machines having a spindle housing for mounting a rotating, cutting tool supporting spindle, said attachment comprising: a vacuum source; a vacuum housing connected to the lower end of said spindle housing of said router and surrounding said cutting tool in said spindle, said vacuum housing connected to said vacuum source and having an aperture in its lower surface through which said cutting tool extends for contact with the printed circuit board, said contact between said cutting tool and said printed circuit board producing chips wHich are contained by said vacuum housing; means located around said aperture for holding down said printed circuit board during said lateral movement and for partially sealing said aperture against said workpiece to establish a vacuum chamber within said vacuum housing for removal of said chips; and means for prohibiting operation of said vacuum source exceptt when said holding down means is in contact with said printed circuit board to prohibit said vacuum source from lifting said printed circuit board.
Claim 10
Dependent Claim
61 words
A protective shield attachment as defined in claim 7 wherein said means for holding down said printed circuit board and for partially sealing said aperture against said printed circuit board comprises a set of bristles having one end attached to said vacuum housing and the other end in contact with said printed circuit board when said cutting tool is in operation.
Claim 11
Dependent Claim
32 words
A protective shield attachment as defined in claim 8 wherein said one end of said set of bristles are received in a circular rib removably connected to the periphery of said aperture.
Claim 12
Dependent Claim
29 words
A protective shield attachment as defined in claim 8 wherein said bristles are flexible, so that said attachment can accommodate variable numbers of printed circuit boards in stacked relation.
Claim 13
Dependent Claim
209 words
An attachment for a lateral movement router tool, having a spindle mounted within a spindle housing and a working surface with lightweight workpieces laterally registered but not affixed thereon, said attachment comprising: a vacuum housing having an inner chamber, with an aperture in the upper and lower surfaces of said vacuum housing; means located adjacent said aperture in said upper surface of said vacuum housing for connecting said vacuum housing to said spindle housing; means attached to said vacuum housing for providing a peripheral partial seal for said inner chamber when said vacuum housing is connected to said spindle housing and said aperture in said lower surface of said vacuum housing is adjacent said workpiece, said means for providing said partial seal being a hold-down device for holding said workpiece to said working surface during said lateral movement of said router tool operation; a vacuum source connected to said vacuum housing, so that, when said vacuum housing is adjacent said workpiece during said operation, loose particles produced by said operation are removed; and means for controlling operation of said vacuum source to prohibit said vacuum source from lifting said lightweight workpieces from said lateral registration when said means for providing a partial seal is not adjacent said lightweight workpiece.
Claim 14
Dependent Claim
209 words
An attachment for a lateral movement router tool, having a spindle mounted within a spindle housing and a working surface with lightweight workpieces laterally registered but not affixed thereon, said attachment comprising: a vacuum housing having an inner chamber, with an aperture in the upper and lower surfaces of said vacuum housing; means located adjacent said aperture in said upper surface of said vacuum housing for connecting said vacuum housing to said spindle housing; means attached to said vacuum housing for providing a peripheral partial seal for said inner chamber when said vacuum housing is connected to said spindle housing and said aperture in said lower surface of said vacuum housing is adjacent said workpiece, said means for providing said partial seal being a hold-down device for holding said workpiece to said working surface during said lateral movement of said router tool operation; a vacuum source connected to said vacuum housing, so that, when said vacuum housing is adjacent said workpiece during said operation, loose particles produced by said operation are removed; and means for controlling operation of said vacuum source to prohibit said vacuum source from lifting said lightweight workpieces from said lateral registration when said means for providing a partial seal is not adjacent said lightweight workpiece.
Claim 15
Dependent Claim
45 words
An attachment for a router tool as defined in claim 11 wherein said means for providing a peripheral partial seal comprises a brush circumscribing the periphery of said aperture in said lower surface of said vacuum housing, said brush having a set of flexible bristles.
Claim 16
Dependent Claim
33 words
An attachment for a router tool as defined in claim 12 wherein said set of flexible bristles are attached to a removable connector ring for connection to said aperture of said vacuum housing.
Claim 17
Dependent Claim
57 words
An attachment for a router tool as defined in claim 11 wherein said means for connecting said vacuum housing to said spindle housing allows said vacuum housing to override said connection between said vacuum housing and said spindle housing to avoid damage to said workpiece if said vacuum housing introduces too great a force on said workpiece.
Claim 18
Dependent Claim
54 words
An attachment for a router tool as defined in claim 11 wherein said means for connecting said vacuum housing to said spindle housing comprises a detent mechanism adjacent said aperture in said upper surface of said vacuum housing, said spindle housing having means for cooperating with said detent mechanism for holding said vacuum housing.
Claim 19
Dependent Claim
31 words
An attachment for a router tool as defined in claim 15 wherein said means for cooperating with said detent mechanism comprises a groove in the outer surface of said spindle housing.
Claim 20
Dependent Claim
50 words
An attachment for a router tool as defined in claim 16 additionally comprising: means for allowing override of said detent mechanism in response to excess force on said vacuum housing during router operation to allow said vacuum housing to reciprocate away from said workpiece to avoid damage to said workpiece.
Claim 21
Dependent Claim
125 words
A router machine comprising: a mounting bracket; a spindle attached to said mounting bracket; a cutter connected to said spindle; a working surface connected to said mounting bracket for lateral movement relative to said spindle and located below said cutter, said working surface maintaining a workpiece; tooling pins extending up from said work surface to provide lateral registration for said workpiece; a vacuum housing attached to the spindle housing and surrounding said cutter, said vacuum housing connected to a vacuum source; means located around the lower periphery of said vacuum housing for holding down said workpiece during the routing operation; and means for prohibiting said vacuum source from lifting said workpiece from said tooling pins when said holding down means is displaced from said workpiece.
Claim 22
Dependent Claim
125 words
A router machine comprising: a mounting bracket; a spindle attached to said mounting bracket; a cutter connected to said spindle; a working surface connected to said mounting bracket for lateral movement relative to said spindle and located below said cutter, said working surface maintaining a workpiece; tooling pins extending up from said work surface to provide lateral registration for said workpiece; a vacuum housing attached to the spindle housing and surrounding said cutter, said vacuum housing connected to a vacuum source; means located around the lower periphery of said vacuum housing for holding down said workpiece during the routing operation; and means for prohibiting said vacuum source from lifting said workpiece from said tooling pins when said holding down means is displaced from said workpiece.
Claim 23
Dependent Claim
50 words
A router machine as defined in claim 18 wherein said means for holding down said workpiece additionally comprises means for sealing the interior of said vacuum housing against said workpiece, when said cutter is positioned for said routing operation, in order to establish a vacuum chamber within said vacuum housing.
Claim 24
Dependent Claim
150 words
A vacuum attachment for a router machine having a reciprocating spindle housing, mounting a rotating, tool carrying spindle, said attachment comprising: a vacuum housing mounted on said router machine for reciprocation with said spindle housing of said router and surrounding the tool in said spindle, said vacuum housing connected to a vacuum source and having an aperture in its lower surface; means located adjacent said aperture and mounted on said housing for holding down the workpiece and for partially sealing said vacuum housing against said workpiece during the routing operation to provide a vacuum chamber within said vacuum housing for chip removal, said means being the sole means for holding down said workpiece during routing; and means for automatically commencing and terminating the operation of the vacuum in response to reciprocation of said vacuum housing to prohibit said vacuum source from lifting said workpiece during reciprocation of said vacuum housing.
Claim 25
Dependent Claim
150 words
A vacuum attachment for a router machine having a reciprocating spindle housing, mounting a rotating, tool carrying spindle, said attachment comprising: a vacuum housing mounted on said router machine for reciprocation with said spindle housing of said router and surrounding the tool in said spindle, said vacuum housing connected to a vacuum source and having an aperture in its lower surface; means located adjacent said aperture and mounted on said housing for holding down the workpiece and for partially sealing said vacuum housing against said workpiece during the routing operation to provide a vacuum chamber within said vacuum housing for chip removal, said means being the sole means for holding down said workpiece during routing; and means for automatically commencing and terminating the operation of the vacuum in response to reciprocation of said vacuum housing to prohibit said vacuum source from lifting said workpiece during reciprocation of said vacuum housing.
Claim 26
Dependent Claim
48 words
A vacuum attachment as defined in claim 20 wherein said means for holding down the workpiece and for partially sealing said housing against said workpiece comprises a brush attached around the periphery of said aperture, said brush having a set of flexible bristles extending down from said periphery.
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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) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |