Patent US3795473A successfully refreshed from Google Patents.
US3795473A
Expired / Lapsed
US
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Apparatus for the automatic production of brake shoes and linings
Assignee: AUTOMATISATIONSANLAGENPROJEKTI
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Filing: 1972-06-26
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Granted: 1974-03-05
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Expires: 1992-06-26
Abstract
Abstract Apparatus for the automatic production of brake shoes and linings comprising an intermittently rotatable table that carries a plurality of hot presses. Brake lining compound is masticated, preheated, comminuted and fed to a pelletizing press, a pellet being fed from the pelletizing press to each hot press on the table during a dwell in the rotary indexing movement of the table. A backing plate for the lining is also fed to each press beneath the pellet. Each hot press is so constructed to apply first a relatively low closing pressure and then a relatively high operating pressure. A vertically movable mold above a heating plate encompasses the die held by a vertically movable die holding plate; but the relative vertical movement is limited so that the die cannot escape the mold during operation.
Inventors
- 👤 K Holik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:46
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/32; B29C43/36; B29B; B29B11/00; B29B11/06; B29B11/12; B29C43/006; B29C43/02; B29C43/04; B29C43/06; B29C43/08; B29C43/18; B30; B30B; B30B11/00; B30B11/02; B30B11/08; B30B11/10; B29C35/00; B29C35/02; B29C2035/0283; B29C43/34; B29C2043/3405; B29C2043/3411; B29C2043/3427; B29C2043/3433; B29C2043/3466; B29C2043/3472; B29C2043/3676; B29C2043/3689; B29C43/14; B29C43/52; B29K; B29K2105/00; B29K2105/0058; B29K2105/007; B29K2105/25; B29K2105/253; B29K2105/255; B29L; B29L2031/00; B29L2031/16; B29L2031/748; B29L2031/7482
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
117 words
Apparatus for the automatic production of brake shoes and linings, comprising a rotary table, a plurality of hot presses carried by the rotary table, a pelletizing press for forming brake lining compound into pellets, means for feeding brake lining compound to the pelletizing press, means for feeding pellets from the pelletizing press to the hot presses on the table, means for heating the brake lining compound prior to the feeding of the pellets to the presses, means for rotating the table about an upright axis with intermittent rotary motion thereby successively to bring the hot Presses into registry with the pellet feeding means, and means for removing brake linings comprising hot pressed pellets from the hot presses.
Claim 2
Dependent Claim
117 words
Apparatus for the automatic production of brake shoes and linings, comprising a rotary table, a plurality of hot presses carried by the rotary table, a pelletizing press for forming brake lining compound into pellets, means for feeding brake lining compound to the pelletizing press, means for feeding pellets from the pelletizing press to the hot presses on the table, means for heating the brake lining compound prior to the feeding of the pellets to the presses, means for rotating the table about an upright axis with intermittent rotary motion thereby successively to bring the hot Presses into registry with the pellet feeding means, and means for removing brake linings comprising hot pressed pellets from the hot presses.
Claim 3
Dependent Claim
21 words
Apparatus as claimed in claim 1, and means for feeding brake shoe backing plates to the hot presses below the pellets.
Claim 4
Dependent Claim
25 words
Apparatus as claimed in claim 2, and means for heating the backing plates prior to the feeding of the backing plates to the hot presses.
Claim 5
Dependent Claim
26 words
Apparatus as claimed in claim 2, and means for applying bonding agent to the backing plates before introduction of the backing plates into the hot presses.
Claim 6
Dependent Claim
104 words
Apparatus as claimed in claim 1, said brake lining compound feeding means comprising a pair of coaxial and axially coextensive open screw conveyors of opposite pitch, a discharge conduit for brake lining compound which has been agitated by said open screw conveyors, a further screw conveyor in said conduit, heating means for brake lining compound passing through said conduit, comminuting means for comminuting brake lining compound discharged from said conduit, weighing means for weighing predetermined quantities of brake lining compound discharged from said comminuting means, and means for transferring weighed charges of comminuted brake lining compound from said weighing means to said pelletizing press.
Claim 7
Dependent Claim
18 words
Apparatus as claimed in claim 5, the helices of said coaxial screw conveyors having a polygonal cross section.
Claim 8
Dependent Claim
168 words
Apparatus as claimed in claim 1, each hot press comprising a press yoke secured to said table, a main press cylinder carried by said press yoke, a pilot cylinder, a heating plate carried by said press yoke between said cylinders, vertical tie rods carried by the press yoke and vertically slidable relative to the heating plate and carrying at their lower ends a cross beam, a pilot piston bearing on said yoke and disposed in said pilot cylinder, a mold shaped to encompass a brake lining and carried by said tie rods, a die holding plate vertically slidable relative to said tie rods, a main press piston vertically slidable in said main press cylinder and bearing against said die holding plate, means limiting relative vertical movement of said mold and die holding plate so that a die disposed in said mold and carried by said die holding plate cannot escape the mold during a pressing operation, and means supplying fluid under pressure to said main and pilot cylinders.
Claim 9
Dependent Claim
30 words
Apparatus as claimed in claim 7, and guide and locking pins disposed between said heating plate and said mold to guide said mold and heating plate relative to each other.
Claim 10
Dependent Claim
16 words
Apparatus as claimed in claim 7, and return spring means urging said main press piston upwardly.
Claim 11
Dependent Claim
19 words
Apparatus as claimed in claim 7, and a mold cover plate disposed between said mold and said heating plate.
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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) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |