US3868062A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tire shredding machine
Assignee: Coats Co Inc
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Filing: 1974-03-25
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Granted: 1975-02-25
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Expires: 1994-03-25
Abstract
Abstract A shredding machine for tires or the like including a head having generally parralel, rotatable shafts each bearing feeding and cutting elements thereon for coaction with the feeding and cutting elements on the other shaft. Bidirectional, hydraulic motors are operable to rotate the shafts in opposite directions and are included in a closed loop hydraulic circuit with a hydraulic pump. The circuit is also provided with a device for reversing the direction of fluid flow in the line to reverse the direction of the motors in response to an increase in pressure in the line in excess of a predetermined amount. The circuit also includes a flow control valve for limiting volumetric flow of hydraulic fluid to one of the motors so that the same will, when in a no-load condition, rotate at a lesser rate than the other. The circuit also includes a bidirectional pressure relief valve.
Inventors
- 👤 Charles L Cunningham
- 👤 Jimmie L Holladay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:11
CPC Classifications
B; B02; B02C; B02C18/00; B02C18/06; B02C18/16; B02C18/24; B02C2018/164; Y; Y10; Y10S; Y10S241/00; Y10S241/31; Y10S60/00; Y10S60/911
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
130 words
A shredding machine comprising: a cutting head including a pair of generally parallel, rotatable shafts each having cutting and feeding means thereon; a pair of bidirectional, rotational output, hydraulic motors, one for each shaft, for rotating the shafts in opposite directions; a hydraulic pump; means for driving said pump; conduit means connecting said pump to said motors in parallel and defining a closed loop; means associated with one of said pump and said conduit means operable to reverse the direction of flow of hydraulic fluid in said conduit means to thereby reverse the direction of rotation of said hydraulic motors; and pressure responsive means associated with said conduit means for sensing when the pressure therein exceeds a predetermined value for operating said reversing means for a predetermined period of time.
Claim 2
Dependent Claim
130 words
A shredding machine comprising: a cutting head including a pair of generally parallel, rotatable shafts each having cutting and feeding means thereon; a pair of bidirectional, rotational output, hydraulic motors, one for each shaft, for rotating the shafts in opposite directions; a hydraulic pump; means for driving said pump; conduit means connecting said pump to said motors in parallel and defining a closed loop; means associated with one of said pump and said conduit means operable to reverse the direction of flow of hydraulic fluid in said conduit means to thereby reverse the direction of rotation of said hydraulic motors; and pressure responsive means associated with said conduit means for sensing when the pressure therein exceeds a predetermined value for operating said reversing means for a predetermined period of time.
Claim 3
Dependent Claim
162 words
A shredding machine comprising: a cutting head including a pair of generally parallel, rotatable shafts each having cutting and feeding means thereon; a pair of bidirectional, rotational output, hydraulic motors, one for each shaft, for rotating the shafts in opposite directions; a hydraulic pump; means for driving said pump; conduit means connecting said pump to said motors in parallel and defining a closed loop; means associated with one of said pump and said conduit means operable to reverse the direction of flow of hydraulic fluid in said conduit means to thereby reverse the direction of rotation of said hydraulic motors; pressure responsive means associated with said conduit means for sensing when the pressure therein exceeds a predetermined value for operating said reversing means for a predetermined period of time; and flow control means in said conduit means between said motors for limiting the volumetric flow rate to one of said hydraulic motors for one direction of fluid flow in said conduit means.
Claim 4
Dependent Claim
162 words
A shredding machine comprising: a cutting head including a pair of generally parallel, rotatable shafts each having cutting and feeding means thereon; a pair of bidirectional, rotational output, hydraulic motors, one for each shaft, for rotating the shafts in opposite directions; a hydraulic pump; means for driving said pump; conduit means connecting said pump to said motors in parallel and defining a closed loop; means associated with one of said pump and said conduit means operable to reverse the direction of flow of hydraulic fluid in said conduit means to thereby reverse the direction of rotation of said hydraulic motors; pressure responsive means associated with said conduit means for sensing when the pressure therein exceeds a predetermined value for operating said reversing means for a predetermined period of time; and flow control means in said conduit means between said motors for limiting the volumetric flow rate to one of said hydraulic motors for one direction of fluid flow in said conduit means.
Claim 5
Dependent Claim
160 words
A shredding machine comprising: a cutting head including a pair of generally parallel, rotatable shafts each having cutting and feeding means thereon; a pair of bidirectional, rotational output, hydraulic motors, one for each shaft, for rotating the shafts in opposite directions; a hydraulic pump; means for driving said pump; conduit means connecting said pump to said motors in parallel and defining a closed loop; means associated with one of said pump and said conduit means operable to reverse the direction of flow of hydraulic fluid in said conduit means to thereby reverse the direction of rotation of said hydraulic motors; pressure responsive means associated with said conduit means for sensing when the pressure therein exceeds a predetermined value for operating said reversing means for a predetermined period of time; and a bidirectional pressure relief valve connected to said conduit means across said pump and operable to establish a bypass for fluid flow when a predetermined pressure develops across said pump.
Claim 6
Dependent Claim
160 words
A shredding machine comprising: a cutting head including a pair of generally parallel, rotatable shafts each having cutting and feeding means thereon; a pair of bidirectional, rotational output, hydraulic motors, one for each shaft, for rotating the shafts in opposite directions; a hydraulic pump; means for driving said pump; conduit means connecting said pump to said motors in parallel and defining a closed loop; means associated with one of said pump and said conduit means operable to reverse the direction of flow of hydraulic fluid in said conduit means to thereby reverse the direction of rotation of said hydraulic motors; pressure responsive means associated with said conduit means for sensing when the pressure therein exceeds a predetermined value for operating said reversing means for a predetermined period of time; and a bidirectional pressure relief valve connected to said conduit means across said pump and operable to establish a bypass for fluid flow when a predetermined pressure develops across said pump.
Claim 7
Dependent Claim
43 words
A shredding apparatus according to claim 3 further including a unidirectional volumetric fluid flow control valve in said conduit means between said motors for limiting the volumetric flow rate of hydraulic fluid to one of said motors for one direction of rotation thereof.
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) | 1978-02-24 | 1978-08-26 | 1979-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-24 | 1982-08-26 | 1983-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-24 | 1986-08-26 | 1987-02-25 | $7700.00 | Window Closed / Lapsed |