US4022182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust and water confinement unit for portable circular saw
Assignee: Individual
•
Filing: 1976-01-12
•
Granted: 1977-05-10
•
Expires: 1996-01-12
Abstract
Abstract A housing unit is disclosed for use with portable circular saws. The housing unit comprises a rigid structure which completely encloses the cutting blade of the saw and which confines water and dust particles so as to permit their removal by suction means whereby the operator and the surrounding atmosphere are protected from the debris which accompanies a sawing operation.
Inventors
- 👤 Steve T. Lenkevich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:40
CPC Classifications
B; B23; B23D; B23D59/00; B23D59/001; B23D59/002; B23Q; B23Q11/00; B23Q11/0042; B23Q11/0046; B23Q11/08; B23Q11/10; B27; B27B; B27B9/00; B27B9/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
183 words
A dust and water confinement unit for a conventional circular saw, said saw having a handle portion and a circular cutting blade, said confinement unit comprising a rigid integral housing member having a generally circular configuration for receiving and substantially enclosing said cutting blade, a base plate secured to said housing member generally at right angles thereto, pivot means on said base plate for receiving said handle portion of the circular saw at a point remote from said cutting blade whereby the saw and housing member are capable of pivotal movement relative to each other, slot means in said housing member for receiving an arbor of the circular saw and cover means for covering said slot during cutting movement of the saw, liquid fluid inlet means disposed in an end surface of said housing member located nearest said pivot means and adjacent said base plate, spring biasing means for biasing said saw into said housing member away from said base plate, and a discharge tube extending from said housing member at a point adjacent said base plate and distant from said fluid means.
Claim 2
Dependent Claim
183 words
A dust and water confinement unit for a conventional circular saw, said saw having a handle portion and a circular cutting blade, said confinement unit comprising a rigid integral housing member having a generally circular configuration for receiving and substantially enclosing said cutting blade, a base plate secured to said housing member generally at right angles thereto, pivot means on said base plate for receiving said handle portion of the circular saw at a point remote from said cutting blade whereby the saw and housing member are capable of pivotal movement relative to each other, slot means in said housing member for receiving an arbor of the circular saw and cover means for covering said slot during cutting movement of the saw, liquid fluid inlet means disposed in an end surface of said housing member located nearest said pivot means and adjacent said base plate, spring biasing means for biasing said saw into said housing member away from said base plate, and a discharge tube extending from said housing member at a point adjacent said base plate and distant from said fluid means.
Claim 3
Dependent Claim
33 words
A confinement unit as set forth in claim 1, further comprising air inlet apertures disposed along a lower surface of said housing member adjacent said end surface and remote from said discharge tube.
Claim 4
Dependent Claim
28 words
A confinement unit as set forth in claim 2 wherein said biasing means comprises an adjustable spring unit for pivotal connection between said saw and said base plate.
Claim 5
Dependent Claim
55 words
A confinement unit as set forth in claim 2 wherein said fluid inlet means is substantially U-shaped and has fluid discharge apertures for directing fluid against the edge and side faces of the cutting blade and wherein one of said air inlet apertures is located in said housing end surface below said fluid inlet means.
Claim 6
Dependent Claim
35 words
A confinement unit as set forth in claim 1 wherein said discharge tube extends from a side surface of said housing member at an acute angle to said housing member and to said base plate.
Claim 7
Dependent Claim
18 words
A confinement unit as set forth in claim 1 wherein said cover means is carried by said arbor.
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) | 1980-05-09 | 1980-11-08 | 1981-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-09 | 1984-11-08 | 1985-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-09 | 1988-11-08 | 1989-05-10 | $7700.00 | Window Closed / Lapsed |