Patent US4498820A successfully refreshed from Google Patents.
US3899263A
Expired / Lapsed
US
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Compactor
Assignee: ARROW MASTER INCORPORATED A CORP OF ILLINOIS
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Filing: 1974-11-07
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Granted: 1975-08-12
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Expires: 1994-11-07
Abstract
Abstract A self-contained engine driven vibratory plate compactor having features which lend it great maneuverability and maximal compacting capabilities under adverse conditions. It features a control system enabling an immediate and effective reversing of its direction of movement over a work surface. In preferred embodiment it includes a vibratory base plate assembly mounting a pair of transversely disposing longitudinally spaced apart exciter means to which hydraulic motors are directly connected. Rising above the plate assembly and isolated from shock resulting from its compacting movements is a superstructure which includes a prime mover, a hydraulic pump driven thereby and a selector valve immediately accessible to the operator of the compactor. A hydraulic circuit provided enables the included selector valve to function to direct fluid under pressure to one or the other of the hydraulic motors. The arrangement provides for independent rotation of the exciter means and for drive of the exciter means in opposite directions or in directions one of which is counter to the direction of drive of the other. By the means provided one can instantaneously energize an exciter means and the direction of rotation thereof will determine the direction of movement of the compactor, which will be instantaneously initiated without interference from the other.
Inventors
- 👤 Eugene C Briggs
- 👤 Lee E Reichel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:13
CPC Classifications
E; E02; E02D; E02D3/00; E02D3/02; E02D3/046
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
126 words
A vibratory plate compactor including a work engaging vibratory base plate, a pair of exciter means, means mounting said exciter means in a closely adjacent connected relation to and for rotation on said base plate, said exciter means being positioned in a longitudinally spaced relation and having their axes of rotation extended in a sense transversely of said base plate, a separate motor connected with each exciter means having in connection therewith means for a separate and independent drive thereof, said motors being operable independently of one another and connected to drive the associated exciter means in respectively opposite directions, and Control means associated with said motor drive means providing that one motor which is operating may be deenergized and the other motor energized substantially simultaneously.
Claim 2
Dependent Claim
126 words
A vibratory plate compactor including a work engaging vibratory base plate, a pair of exciter means, means mounting said exciter means in a closely adjacent connected relation to and for rotation on said base plate, said exciter means being positioned in a longitudinally spaced relation and having their axes of rotation extended in a sense transversely of said base plate, a separate motor connected with each exciter means having in connection therewith means for a separate and independent drive thereof, said motors being operable independently of one another and connected to drive the associated exciter means in respectively opposite directions, and Control means associated with said motor drive means providing that one motor which is operating may be deenergized and the other motor energized substantially simultaneously.
Claim 3
Dependent Claim
81 words
A vibratory plate compactor according to claim 1 characterized by the respective exciter means being respectively disposed adjacent an opposite end of said base plate and one said exciter means being arranged to rotate in a direction counterclockwise to the direction of rotation of the other and the drive of either of said exciter means by its related motor being effective to move the compactor in the direction determined by the direction of the most adjacent end of said base plate.
Claim 4
Dependent Claim
38 words
Apparatus as in claim 2 characterized by said exciter means including a coupling portion eccentric to one end thereof and means providing a direct axial connection between said coupling portion and the drive shaft of its related motor.
Claim 5
Dependent Claim
89 words
A vibratory plate compactor as in claim 1 characterized by said motors being hydraulic motors and said drive means for said motors including means mounted in a spaced elevated relation to said base plate and in spaced relation to said motors by resilient shock absorbing supports and arranged to commonly furnish motive power to drive said motors and said control means being incorporated in said drive means to provide for a substantially instantaneous switch of the motive power from one to the other of said motors, as needs require.
Claim 6
Dependent Claim
60 words
Apparatus as in claim 4 characterized by said drive means including a hydraulic pump connected to deliver fluid under pressure to drive said motors and said control means comprising a selector valve interposed between said pump and said motors and operable to simultaneously switch the direction of flow of fluid under pressure from one to the other of said motors.
Claim 7
Dependent Claim
59 words
Apparatus as in claim 5 characterized by means in connection with said base plate providing a substantially sealed compartment for said exciter means and mounting said motors in an adjacent end spaced relation to the related exciter means, there being means providing an eccentric driving connection between said motors and the respectively related exciter means interiorly of said compartment.
Claim 8
Dependent Claim
66 words
Apparatus as in claim 6 characterized by said vibratory base plate being provided with a substantially flat planar portion intermediate its ends serving as a base for the compactor and the opposite ends of said base plate being bent upward in a configuration that either end may act as the leading end of the compactor in respect to its continuing operation in forward and reverse sense.
Claim 9
Dependent Claim
35 words
Apparatus as in claim 6 characterized by said drive means interconnecting a drive motor with its associated exciter means including coaxial telescoping parts having an interconnection through the medium of a transversely inserted coupling pin.
Claim 10
Dependent Claim
112 words
Apparatus as in claim 1 wherein said motors are hydraulic motors and said compactor is characterized by a superstructure rising above said exciter means and said motors in a superposed spaced relation thereto, resilient supports mounting said superstructure in connection with said base plate and said superstructure mounting a prime mover, a hydraulic pump operated thereby, and a selector valve receiving fluid under pressure from said pump and operable to provide said control means, and flexible lines for conducting fluid under pressure leading from said valve to the respective motors, said valve being operable to substantially instantaneously change the direction of flow of said fluid under pressure from one line to another.
Claim 11
Dependent Claim
172 words
A vibratory plate compactor according to claim 1 characterized by each said motor being a hydraulic motor coupled directly to and in line with means eccentrically positioned in connection with one end of a weight constituting the associated exciter means, said drive means for said motors being provided by an engine driven hydraulic pump, a base mounting said pump having a platelike form and being mounted in turn in an intercoNnected spaced elevated relation to said base plate, said exciter means and said motors by resilient supporting elements, said base mounting said pump mounting thereon a reservoir of hydraulic fluid connected in a hydraulic circuit for supplying fluid to said pump for delivery thereby under pressure to said motors, and said control means including a selector valve interposed between said pump and said motors and said reservoir and providing a single device through the medium of which fluid under pressure may be selectively directed to determine the operating condition and the direction of or lack of direction of movement of said compactor.
Claim 12
Dependent Claim
131 words
Apparatus as in claim 1 characterized by means in connection with and extending longitudinally of the uppermost surface of said vibratory base plate, in intersecting relation to a transverse mid portion thereof, defining a housing for said exciter means, said exciter means being in the form of eccentrically mounted weights including to one end thereof, in eccentric position to its longitudinal axis, a coupling portion, said motors being hydraulic motors respectively positioned on reverse sides of said housing and in line with the eccentrically positioned coupling portion of its associated exciter means, each said motor having a drive shaft extending therefrom to project inwardly of said housing and being coupled within said housing by telescopically related means in association with the adjacent coupling portion of the eccentric weight in line therewith.
Claim 13
Dependent Claim
87 words
A vibratory plate compactor as in claim 11 characterized by said drive means including means for delivering fluid under pressure to the respective motors supported on a plate mounted in spaced elevated relation to said vibratory base plate by resilient supports, said control means comprising a selector valve for directing fluid under pressure to one of said motors while preventing the flow of fluid under pressure to the other said motors and said elevated plate including wing-like portions extending in an overlapping protective relation to said motors.
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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) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |