Patent US3722497A successfully refreshed from Google Patents.
US3722497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wall saw
Assignee: CONTINENTAL DRILLING CO
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Filing: 1971-04-08
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Granted: 1973-03-27
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Expires: 1991-04-08
Abstract
Abstract A saw for cutting openings in walls and other flat surfaces is disclosed. The saw is mounted on a trolley which rides on a track attached to the flat surface, and is moved along the track by means of a gear driving device. The saw blade is mounted at one end of an arm. The arm is pivotable about its other end, which is attached to a cylindrical housing around the output shaft of the motor. When the housing is rotated, the end of the arm holding the saw blade is moved up and down for adjusting the depth of cut.
Inventors
- 👤 J Hiestand
- 👤 R Theis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:06
CPC Classifications
B; B23; B23Q; B23Q5/00; B23Q5/22; B23Q5/34; B23Q5/38; B23Q5/385; B23D; B23D47/00; B23D47/02; B23Q1/00; B23Q1/25; B23Q1/44; B23Q1/48; B23Q1/4804; B23Q9/00; B23Q9/0014; B28; B28D; B28D1/00; B28D1/02; B28D1/04; B28D1/045
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
218 words
A saw assembly comprising: a motor having a rotatable shaft, an outer housing about the output shaft of the motor, A MOVABLE TROLLEY TO WHICH THE OUTER HOUSING IS ATTACHED: a track having a longitudinal axis along which the trolley moves and brackets by which the track is mounted to a surface, a cylindrical housing disposed around the output shaft within the outer housing such that the longitudinal axis of the cylindrical housing is substantially coincident with the longitudinal axis of the output shaft. means connecting the cylindrical housing to the outer housing such that the cylindrical housing is selectably rotatable about its longitudinal axis, means for adjusting the position of a saw blade and its depth of cut in a plane parallel to the axis of said track, said saw blade being adjustably positioned so as to cut said surface along said track on either side of said intersection of the plane of the longitudinal axis of said cylindrical housing and said track axis comprising an arm having a first end rigidly attached to the cylindrical housing and rotatable therewith, said saw blade being attached to the arm, at a second end opposite the first end of said arm, and drive means connecting the saw blade to the output shaft whereby the motor drives the saw blade.
Claim 2
Dependent Claim
218 words
A saw assembly comprising: a motor having a rotatable shaft, an outer housing about the output shaft of the motor, A MOVABLE TROLLEY TO WHICH THE OUTER HOUSING IS ATTACHED: a track having a longitudinal axis along which the trolley moves and brackets by which the track is mounted to a surface, a cylindrical housing disposed around the output shaft within the outer housing such that the longitudinal axis of the cylindrical housing is substantially coincident with the longitudinal axis of the output shaft. means connecting the cylindrical housing to the outer housing such that the cylindrical housing is selectably rotatable about its longitudinal axis, means for adjusting the position of a saw blade and its depth of cut in a plane parallel to the axis of said track, said saw blade being adjustably positioned so as to cut said surface along said track on either side of said intersection of the plane of the longitudinal axis of said cylindrical housing and said track axis comprising an arm having a first end rigidly attached to the cylindrical housing and rotatable therewith, said saw blade being attached to the arm, at a second end opposite the first end of said arm, and drive means connecting the saw blade to the output shaft whereby the motor drives the saw blade.
Claim 3
Dependent Claim
100 words
A device as recited in claim 1 wherein the end of the output shaft opposite the motor is formed as a pinion gear and wherein the drive means comprises: a spindle rigidly attached to the saw blade and rotatably attached to the second end of the arm, and multiple circular gears disposed along the length of the arm and connected in a continuous series to form a drive train, said drive train connected to the pinion gear at one end and to the spindle at the other end such that rotation of the pinion gear causes rotation of the spindle.
Claim 4
Dependent Claim
29 words
A device as recited in claim 1 wherein the track is tubular and comprises a series of track sections positioned end to end to form a substantially continuous track.
Claim 5
Dependent Claim
31 words
A device as recited in claim 3 and additionally comprising wheels connected to the trolley and adapted to rest on the track and facilitate travel of the trolley along the track.
Claim 6
Dependent Claim
32 words
A device as recited in claim 4 wherein the tubular track has a substantially rectangular cross-section and wherein the wheels are adapted to rest on all four sides of the tubular track.
Claim 7
Dependent Claim
40 words
A device as recited in claim 3 and additionally comprising rack teeth disposed along the length of the tubular track and gear driving means connecting the rack teeth with the trolley by which the trolley is propelled along the track.
Claim 8
Dependent Claim
60 words
A device as recited in claim 6 wherein the gear driving means comprises: a circular gear rotatably attached to the trolley and adapted to mesh with the rack teeth, a drive worm wheel rigidly attached to the circular gear and rotatable therewith, a drive worm adapted to mesh with the drive worm wheel, and means for driving the drive worm.
Claim 9
Dependent Claim
186 words
A device as recited in claim 7 wherein the means for driving the drive worm comprises: a rotatable drive shaft rigidly attached to the drive worm and rotatable therewith, said drive shaft having a head formed in the shape of a polygon, a handle having one end adapted to mate with the head of the drive shaft in abutting relationship to the polygon sides such that rotation of said handle causes rotation of said drive shaft, and wherein the means connecting the cylindrical housing to the outer housing comprises: an adjustment worm wheel disposed around the cylindrical housing and adapted to rotate about the longitudinal axis of said cylindrical housing, said adjustment worm wheel fixed to said cylindrical housing and rotatable therewith, an adjustment worm adapted to mesh with the adjustment worm wheel, and a rotatable adjustment shaft rigidly attached to the adjustment worm and rotatable therewith, said adjustment shaft having a head formed in the shape of polygon similar to the head of the drive shaft such that the handle mates with the head of the adjustment shaft in abutting relationship to the polygon sides.
Claim 10
Dependent Claim
70 words
A device as recited in claim 1 wherein the means connecting the cylindrical housing to the outer housing comprises: an adjustment worm wheel disposed around the cylindrical housing and adapted to rotate about the longitudinal axis of the cylindrical housing, said adjustment worm wheel fixed to said cylindrical housing and rotatable therewith, an adjustment worm adapted to mesh with the adjustment worm wheel, and means for rotating the adjustment worm.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |