US3608878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame cutting machine
Assignee: R H DRESHMAN AND SONS Inc
•
Filing: 1968-08-01
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Granted: 1971-09-28
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Expires: 1988-08-01
Abstract
Abstract Flame cutting machine for cutting iron or steel plates, bars, structural shapes, castings, etc. characterized in the provision of a variable speed positive drive means for the rail mounted torch carriage or gantry thereof by which the carriage is driven in smooth, uniform manner at any cutting speed between zero and maximum, said drive means being mounted on the carriage for floating movement to accommodate misalignment of the carriage guide rails. Machine further characterized in the provision of floating positive drive means for rapid traverse of the carriage.
Inventors
- 👤 Roy H Dreshman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:00
CPC Classifications
B; B23; B23K; B23K7/00; B23K7/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
157 words
A flame cutting machine comprising a carriage supported on parallel rails for movement therealong; said carriage comprising a beam extending transversely over said rails and having opposite longitudinally extending portions which are provided with rollers adjacent their ends engaging said rails; drive means on said beam having oppositely extending drive shafts which terminate in downturned shaft portions adjacent the ends of said beam; drive gears on said shaft portions meshing with gear racks on the respective rails to propel said carriage along said rails; a cutting torch on said beam operative to cut stock therebeneath and between said rails as said carriage travels on said rails; a support means engaging at least one of said downturned shaft portions movably connected to the carriage for lateral movement of the support means relative the carriage, the support means thereby maintaining the gears in meshing engagement with the respective racks despite deviation of the rails and racks from true parallelism.
Claim 2
Dependent Claim
157 words
A flame cutting machine comprising a carriage supported on parallel rails for movement therealong; said carriage comprising a beam extending transversely over said rails and having opposite longitudinally extending portions which are provided with rollers adjacent their ends engaging said rails; drive means on said beam having oppositely extending drive shafts which terminate in downturned shaft portions adjacent the ends of said beam; drive gears on said shaft portions meshing with gear racks on the respective rails to propel said carriage along said rails; a cutting torch on said beam operative to cut stock therebeneath and between said rails as said carriage travels on said rails; a support means engaging at least one of said downturned shaft portions movably connected to the carriage for lateral movement of the support means relative the carriage, the support means thereby maintaining the gears in meshing engagement with the respective racks despite deviation of the rails and racks from true parallelism.
Claim 3
Dependent Claim
45 words
The machine of claim 1 wherein the downturned shaft portion engaged by said support means includes a universal joint therein dividing the downturned shaft portion into upper and lower sections, the lower section being engaged by the support means and movable laterally relative the carriage.
Claim 4
Dependent Claim
33 words
The machine of claim 1 wherein one of said rails and the carriage rollers engaged therewith are arranged to guide said carriage for movement in a straight path parallel to said one rail.
Claim 5
Dependent Claim
72 words
The machine of claim 3 wherein the other of said rails and the carriage rollers engaged therewith are arranged to support that side of said carriage without disturbing the straight path of movement of said carriage despite slight departure of said other rail from straightness and/or nonparallelism with respect to said one rail, said support means being on the same side of the carriage as the carriage rollers engaging said other rail.
Claim 6
Dependent Claim
38 words
The machine of claim 4 wherein said one rail has beveled upper edges with which correspondingly inclined cylindrical rollers are engaged; and wherein said other rail has a substantially planar top surface with which cylindrical rollers are engaged.
Claim 7
Dependent Claim
31 words
The machine of claim 1 wherein said torch is supported on said beam for movement therealong for transverse cutting of stock at various longitudinal positions of said carriage on said rails.
Claim 8
Dependent Claim
49 words
The machine of claim 1 wherein said torch is mounted on a riding device which is pivotally mounted on said beam, said riding device engaging the top surface of the stock to be cut thus to maintain said torch a predetermined distance above said stock during the cutting operation.
Claim 9
Dependent Claim
20 words
The machine of claim 7 wherein said riding device has a transverse bar to which said torch is adjustably clamped.
Claim 10
Dependent Claim
24 words
The machine of claim 8 wherein said transverse bar is of length to accommodate another torch in adjustable spaced relation to the first-mentioned torch.
References Cited (Backward Citations)
US2297343A
Cited
GB620016A
Cited
US2534958A
Cited
US2665900A
Cited
US3368803A
Cited
US3467263A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |