US3907474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compacting apparatus including steady and vibratory force means
Assignee: Von Roll AG
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Filing: 1973-07-19
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Granted: 1975-09-23
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Expires: 1993-07-19
Abstract
Abstract To improve the accuracy of manufacturing processes, and to prevent damage to equipment, the actual compaction pressure applied to a compaction piston subjected to vibratory and steady state forces is measured, and the actual pressure compared with a command pressure to derive an error signal controlling application of steady force pressure. Steady force pressure, and vibratory energy can be separately applied to a single piston, by guiding a vibrating piston rod in a sleeve, which sleeve is subjected to steady state pressure forces, the reaction pressure force of which is measured and utilized to control application of feed power to the sleeve.
Inventors
- 👤 Harry Blaser
- 👤 Franz Stelzmuller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:23
CPC Classifications
B; B30; B30B; B30B11/00; B30B11/02; B30B11/022; B30B11/14; B30B15/00; B30B15/30; B30B15/302
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
237 words
Compacting apparatus to manufacture blocks by compacting a mixture of a granulate and a binder, comprising a compacting cylinder (2) in which the granulate to be compacted is placed; bottom and top pistons (3, 4) closing said cylinder and movable to compact granulate within the cylinder; a piston support means (62) connected to and supporting at least one of the pistons (3, 4); means (6, 7, 12) moving at least one piston (3, 4) in compaction direction, comprising a spindle drive, the support means (62) forming the spindle element of the spindle drive and a spindle nut (64) forming the nut element of the spindle drive; a housing (124) for the spindle drive, and means (10, 11) supporting the housing, the spindle element (62) being journalled in the housing and the spindle nut elements (64, 129) being supported in the housing; and motor means (70) in rotating engagement with one of the elements of the spindle drive (20); wherein the piston support means comprises a piston guide rod (60) connected to each of the pistons (3, 4); a sleeve (62) surrounding each of the piston guide rods (60), the sleeve forming said spindle element; and wherein separate force means (12) are provided, secured to the sleeve (62) and to the piston guide rod (60) respectively, to impart a force to the piston guide rod (60) and hence to the pistons (3, 4) with respect to the sleeve.
Claim 2
Dependent Claim
237 words
Compacting apparatus to manufacture blocks by compacting a mixture of a granulate and a binder, comprising a compacting cylinder (2) in which the granulate to be compacted is placed; bottom and top pistons (3, 4) closing said cylinder and movable to compact granulate within the cylinder; a piston support means (62) connected to and supporting at least one of the pistons (3, 4); means (6, 7, 12) moving at least one piston (3, 4) in compaction direction, comprising a spindle drive, the support means (62) forming the spindle element of the spindle drive and a spindle nut (64) forming the nut element of the spindle drive; a housing (124) for the spindle drive, and means (10, 11) supporting the housing, the spindle element (62) being journalled in the housing and the spindle nut elements (64, 129) being supported in the housing; and motor means (70) in rotating engagement with one of the elements of the spindle drive (20); wherein the piston support means comprises a piston guide rod (60) connected to each of the pistons (3, 4); a sleeve (62) surrounding each of the piston guide rods (60), the sleeve forming said spindle element; and wherein separate force means (12) are provided, secured to the sleeve (62) and to the piston guide rod (60) respectively, to impart a force to the piston guide rod (60) and hence to the pistons (3, 4) with respect to the sleeve.
Claim 3
Dependent Claim
42 words
Apparatus according to claim 1, wherein the element of the spindle drive being rotated is the spindle nut element (64); and means rotating the said element comprises a worm drive (28, 67) engaging the spindle nut element (64) to impart rotation thereto.
Claim 4
Dependent Claim
41 words
Apparatus according to claim 1 wherein the spindle nut element (64) is formed with an inner thread engaging the spindle element (62) and with an outer gearing (66), said outer gearing being engaged by the worm (67) of the worm drive.
Claim 5
Dependent Claim
14 words
Apparatus according to claim 1, wherein the motor means comprises a hydraulic motor (70).
Claim 6
Dependent Claim
27 words
Apparatus according to claim 1, wherein the sleeve (62) is threaded at least in part on the outside and forming the spindle element for the spindle drive.
Claim 7
Dependent Claim
43 words
Apparatus according to claim 5 including motor control means (20, 21; 150) connected to the motor means (70) and controlling the motor means to apply a steady force on the sleeve (62) in the direction to compact granulate within the compaction cylinder (2).
Claim 8
Dependent Claim
61 words
Apparatus according to claim 6 wherein the motor means comprises a hydraulic motor; electrohydraulic valve means (13) are provided controlling flow of hydraulic pressure fluid to the motor; and pressure-sensing means (25) are provided to sense reaction pressure of said at least one piston, the pressure-sensing means being connected to at least one of: said piston rod (60); said sleeve (62).
Claim 9
Dependent Claim
47 words
Apparatus according to claim 1 further comprising pressure sensing means (25) connected through said at least one piston (3, 4) having pressure applied thereto and providing a pressure signal representative of actual pressure applied to the granulate, said signal controlling the pressure applied by said motor means.
Claim 10
Dependent Claim
52 words
Apparatus according to claim 8 wherein the motor means is a hydraulic motor (70); an electrohydraulic valve (12) is provided and means (45) supplying hydraulic fluid under pressure to said valve; and wherein the pressure signal is connected to said valve (12) to control the application of hydraulic pressure by said valve.
Claim 11
Dependent Claim
18 words
Apparatus according to claim 1, wherein the spindle drive comprises play, or backlash elimination means (126, 127, 128).
Claim 12
Dependent Claim
29 words
Apparatus according to claim 10 wherein the spindle nut element is formed in two parts (64, 129) and means (163) resiliently biassing said parts with respect to each other.
Claim 13
Dependent Claim
39 words
Apparatus according to claim 11, wherein the means biassing said parts with respect to each other comprises spring means (163) located to spread said parts to provide play-free engagement of one of said parts (64) with the spindle (62).
Claim 14
Dependent Claim
79 words
Apparatus according to claim 11, wherein the means biassing said parts with respect to each other comprises a cavity formed in one of said parts, facing the other; and projecting means extending in said cavity and towards the other part to provide a cylinder-piston arrangement; and means introducing pressure fluid in said cavity, to project said projecting means and hence spread said parts to provide for play-free engagement of one of said parts (64) with respect to the spindle.
Claim 15
Dependent Claim
12 words
Apparatus according to claim 1, wherein said cylinder (2) is laterally moveable.
Claim 16
Dependent Claim
40 words
Apparatus according to claim 14, wherein two cylinders (2) are provided, coupled to each other, and both conjointly laterally shiftable; and means are provided to charge one of said cylinders while the other cylinder is subjected to said compaction forces.
Claim 17
Dependent Claim
40 words
Apparatus according to claim 1, wherein the apparatus further comprises a suction box housing (131) fitting against the upper portion of the cylinder (2), and means removing gases and vapors arising during compaction of the granulate in the cylinder (2).
Claim 18
Dependent Claim
46 words
Apparatus according to claim 1, further comprising a hydraulic ram (137) acting between the housing (124) and at least one of said pistons (2, 3) to subject the respective piston to compaction pressure separately from the force capable of being exerted by the motor means (70).
Claim 19
Dependent Claim
30 words
Apparatus according to claim 1 wherein the separate force means comprises vibrating means (20-24; 150) to impart vibratory movement to the piston rod (60) with respect to the sleeve (62).
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |