US3911627A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Belt grinding machine adapted to grind a flat or curved surface
Assignee: Individual
•
Filing: 1974-04-15
•
Granted: 1975-10-14
•
Expires: 1994-04-15
Abstract
Abstract The invention concerns a belt grinding machine or finisher, adapted to grind a flat or curved surface. The belt is driven and endless and passes over a conveyor on which workpieces each having a face to be ground, are located. The belt runs over a flexible beam which can be bent by one or more of a plurality of piston and cylinder units some of which are fixed to and some mounted displaceably on the frame of the machine, each cylinder having a feeler-actuator which during the passage of a workpiece past the belt, comes into contact with the surface to be ground, or a template, and follows the curvature thereof. Each feeler operates a valve to admit pressure fluid to or drain it from its cylinder so that the various cylinder actuations cause the beam and hence the belt to follow a path the curvature of which is that desired on the workpiece surface.
Inventors
- 👤 Karl Heesemann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:38
CPC Classifications
B; B24; B24B; B24B21/00; B24B21/04; B24B21/06; B24B21/08; B24B21/16
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
206 words
A belt grinding machine comprising a frame, conveying means on said frame for conveying workpieces to be ground along a first path, endless grinding belt means operably overlying said first path, a flexible pressure member overlying a portion of said belt means and extending transversely entirely across said first path, a support member fixedly mounted on said frame overlying said pressure member, a plurality of motor means having cylinders supported upon said support member and plunger means displaceable within said cylinders and engageable with spaced portions of said pressure member for pressing said pressure member against said belt means to press said belt means against workpieces conveyed along said first path, mounting means mounting at least some of said cylinders on said support member for movement toward and away from said pressure member, a plurality of first control means respectively coupled to each of said motors for independently displacing the plunger means of each motor to provide grinding pressure, and a plurality of second control means respectively coupled to each of said at least some of said cylinders for independently shifting the individual last mentioned cylinders toward and away from said pressure member in accordance with the curvature of a workpiece longitudinally of said first path.
Claim 2
Dependent Claim
206 words
A belt grinding machine comprising a frame, conveying means on said frame for conveying workpieces to be ground along a first path, endless grinding belt means operably overlying said first path, a flexible pressure member overlying a portion of said belt means and extending transversely entirely across said first path, a support member fixedly mounted on said frame overlying said pressure member, a plurality of motor means having cylinders supported upon said support member and plunger means displaceable within said cylinders and engageable with spaced portions of said pressure member for pressing said pressure member against said belt means to press said belt means against workpieces conveyed along said first path, mounting means mounting at least some of said cylinders on said support member for movement toward and away from said pressure member, a plurality of first control means respectively coupled to each of said motors for independently displacing the plunger means of each motor to provide grinding pressure, and a plurality of second control means respectively coupled to each of said at least some of said cylinders for independently shifting the individual last mentioned cylinders toward and away from said pressure member in accordance with the curvature of a workpiece longitudinally of said first path.
Claim 3
Dependent Claim
73 words
The invention defined in claim 1 wherein each of said second control means comprises scanning means engageable with a scanning surface on said workpiece having a curvature variable longitudinally of the direction of movement of said workpiece along said first path, pressure means for pressing said scanning means against said scanning surface, and motion transmitting means for transmitting displacement of said scanning means to one of said at least some of said cylinders.
Claim 4
Dependent Claim
15 words
The invention defined in claim 2 wherein said motion transmitting means comprises a Bowden wire.
Claim 5
Dependent Claim
65 words
The invention defined in claim 2 wherein said scanning means comprises an arm pivotably mounted at one end on said frame, and a scanning roller rotatably mounted at the opposite end of said arm, said pressure means being engaged between said frame and an intermediate portion of said arm and said motion transmitting means being coupled between said arm and said one of said cylinders.
Claim 6
Dependent Claim
45 words
The invention defined in claim 1 wherein said mounting means comprises a guide member fixedly secured to each of said at least some of said cylinders and a ball guide mounted upon said support member for slideably guiding said guide member in non-rotary reciprocating movement.
Claim 7
Dependent Claim
85 words
The invention defined in claim 1 where said at least some of said cylinders comprise a second group of cylinders and additional ones of said cylinders comprise a first group of cylinders, said first group of cylinders being equally divided into two similar groups fixedly secured to said support member to overlie the opposite outer side edge portions of a workpiece moving along said first path and said second group of cylinders being disposed between the two similar groups of said first group of cylindrs.
Claim 8
Dependent Claim
42 words
The invention defined in claim 6 wherein said first control means comprises first scanning roller means engageable with the upper surface of a workpiece and said second control means comprises second scanning roller means engageable with the lower siDe of a workpiece.
Claim 9
Dependent Claim
89 words
The invention defined in claim 7 wherein said first scanning roller means comprises a first scanning roller for each of said cylinders of both of said first and said second groups, each first scanning roller means being operable to control the displacement of its plunger means in accordance with the position of its first spanning roller, and said second scanning means comprises a second scanning roller for each of said second group of cylinders only, and means for transmitting displacement of each second scanning roller to its associated cylinder.
Claim 10
Dependent Claim
16 words
The invention defined in claim 8 wherein said means for transmitting displacement comprises a Bowden wire.
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) | 1978-10-13 | 1979-04-14 | 1979-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-13 | 1983-04-14 | 1983-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-13 | 1987-04-14 | 1987-10-14 | $7700.00 | Window Closed / Lapsed |