US3884280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wall outlet and switch box hole cutter
Assignee: Individual
•
Filing: 1974-04-18
•
Granted: 1975-05-20
•
Expires: 1994-04-18
Abstract
Abstract A cutter accessory adapted to be used with portable power tools for cutting holes in sheet material such as wallboard and panelling. The device includes a housing; an endless chain disposed in the housing for rotation therein, and a plurality of cutting edges carried by the chain and extending forwardly from the housing. A drive member located in the housing is adapted for coupling to a rotary power source such as a drill for driving the chain. Improvements are described which permit the hole to have any desired shape (e.g. rectangular), to be stable against motion in the plane of the workpiece and to facilitate centering of the cutter on a desired location.
Inventors
- 👤 John D Chailer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:27
CPC Classifications
B; B23; B23B; B23B45/00; B23B45/003; B23B51/00; B27; B27F; B27F5/00; B27F5/02; B27F5/06; Y; Y10; Y10S; Y10S33/00; Y10S33/10; Y10T; Y10T408/00; Y10T408/34
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
102 words
A cutting device adapted for use with a source of rotary power for cutting shaped openings in sheet material comprising a housing; an endless driven member mounted for movement within said housing, said member being provided with cutting means extending forwardly of said housing; rotatable drive means for causing movement of said member; a sight opening formed through said housing at a location corresponding to the center of the shaped opening to be cut by said device; and a plurality of idler means mounted within said housing and positioned so that said member is constrained to move along a desired closed path.
Claim 2
Dependent Claim
102 words
A cutting device adapted for use with a source of rotary power for cutting shaped openings in sheet material comprising a housing; an endless driven member mounted for movement within said housing, said member being provided with cutting means extending forwardly of said housing; rotatable drive means for causing movement of said member; a sight opening formed through said housing at a location corresponding to the center of the shaped opening to be cut by said device; and a plurality of idler means mounted within said housing and positioned so that said member is constrained to move along a desired closed path.
Claim 3
Dependent Claim
31 words
A cutting device as claimed in claim 1 wherein said cutting means is adapted to simultaneously engage a workpiece along an outline corresponding to the path of movement of said member.
Claim 4
Dependent Claim
31 words
A cutting device as claimed in claim 1 wherein said driven member comprises a chain and wherein said cutting means comprises a plurality of individual cutting elements secured to said chain.
Claim 5
Dependent Claim
20 words
A cutting device as claimed in claim 3 wherein driving means and said idlers comprise sprockets engaged with said chain.
Claim 6
Dependent Claim
38 words
A cutting device as claimed in claim 1 wherein said shaped path includes at least two rectilinear portions intersecting at a corner and wherein one of said idlers carries said driven member along an approximation of said corner.
Claim 7
Dependent Claim
33 words
A cutting device as claimed in claim 5 wherein said path comprises a rectangle and at least one of said drive means and idlers is provided at each corner of said rectangular path.
Claim 8
Dependent Claim
20 words
A cutting device as claimed in claim 1 wherein said drive means is offset from the center of said path.
Claim 9
Dependent Claim
105 words
A cutting device adapted for use with a source of rotary power for cutting shaped openings in sheet material comprising a housing; an endless driven member mounted for movement within said housing, said member having cutting means extending forwardly from said housing, said member and said cutting means being arranged in the shape of said opening; drive means within said housing for driving said member, said drive means being located at a point offset from the center of said opening; and said housing including an aperture in the center thereof to enable an operator to center said device over the desired location of said opening.
Claim 10
Dependent Claim
105 words
A cutting device adapted for use with a source of rotary power for cutting shaped openings in sheet material comprising a housing; an endless driven member mounted for movement within said housing, said member having cutting means extending forwardly from said housing, said member and said cutting means being arranged in the shape of said opening; drive means within said housing for driving said member, said drive means being located at a point offset from the center of said opening; and said housing including an aperture in the center thereof to enable an operator to center said device over the desired location of said opening.
Claim 11
Dependent Claim
93 words
A cutter accessory adapted to be used with a portable drill for cutting rectangular holes in sheet material comprising a housing; an endless chain mounted for movement within said housing, a plurality of cutting blades carried by said chain and extending forwardly of said housing; drive means for driving said chain within said housing positioned at one corner of said rectangular shape and having a portion extending forwardly of said housing; and a plurality of idlers juxtaposed with said drive means to lead said chain around the corners of a desired rectangular shape.
Claim 12
Dependent Claim
93 words
A cutter accessory adapted to be used with a portable drill for cutting rectangular holes in sheet material comprising a housing; an endless chain mounted for movement within said housing, a plurality of cutting blades carried by said chain and extending forwardly of said housing; drive means for driving said chain within said housing positioned at one corner of said rectangular shape and having a portion extending forwardly of said housing; and a plurality of idlers juxtaposed with said drive means to lead said chain around the corners of a desired rectangular shape.
Claim 13
Dependent Claim
44 words
A cutter accessory as claimed in claim 9 wherein said drive means comprises a shaft, said shaft having a driving member mounted thereon and coupled to said chain; said shaft including a portion extending rearwardly of said housing for engagement with a portable drill.
Claim 14
Dependent Claim
20 words
A cutter accessory as claimed in claim 10 wherein said shaft further includes said portion extending forwardly of said housing.
Claim 15
Dependent Claim
20 words
A cutter accessory as claimed in claim 9 and including a second drive means independent of said first drive means.
Claim 16
Dependent Claim
22 words
A cutter accessory as claimed in claim 12 wherein first and second drive means are offset from the center of said rectangle.
Claim 17
Dependent Claim
27 words
A cutter accessory as claimed in claim 13 wherein said housing includes an aperture extending therethrough for sighting on the center of a location to be cut.
Claim 18
Dependent Claim
93 words
A cutter accessory adapted to be used with a portable drill for cutting rectangular holes in sheet material, said cutter comprising a housing; a plurality of blades extending from said housing and arranged in a rectangular shape; drive means within said housing for driving said blades upon engagement thereof with a portable drill; said drive means being located at a point removed from the center of said housing; and said housing further including an aperture in the center thereof to enable an operator to sight on the center of a desired hole location.
Claim 19
Dependent Claim
93 words
A cutter accessory adapted to be used with a portable drill for cutting rectangular holes in sheet material, said cutter comprising a housing; a plurality of blades extending from said housing and arranged in a rectangular shape; drive means within said housing for driving said blades upon engagement thereof with a portable drill; said drive means being located at a point removed from the center of said housing; and said housing further including an aperture in the center thereof to enable an operator to sight on the center of a desired hole location.
References Cited (Backward Citations)
US1667347A
Cited
US2536650A
Cited
US2985204A
Cited
US3499353A
Cited
US3823754A
Cited
US3833311A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |