US3908843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brake system
Assignee: Massey Ferguson Inc
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Filing: 1974-02-21
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Granted: 1975-09-30
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Expires: 1994-02-21
Abstract
Abstract A vehicle mounted boom for supporting working implements and having side swing movement is provided with a brake which is operative alternately with the boom swing motor to prevent the boom from swinging whenever it isn''t being moved by the motor.
Inventors
- 👤 Fred W Noller
- 👤 James Leroy Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:04
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/36; E02F3/38; E02F3/382; E02F3/384
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
183 words
In a vehicle having a boom swingable to the side of the vehicle for supporting working implements, a brake system including a base mounted on the vehicle, a swingable boom support mounted on the base, an actuator interconnecting the base and the support for providing relative movement therebetween, means for stopping the relative movement including a selective engaging member mounted on the base and an engageable member selectively engageable by the engaging member and mounted on the support, means for controlling said engaging member comprising: a directional valve for directing flow to said actuator, an energy source, and conduits interconnecting all the above for directing flow to said actuator to swing the boom, a second valve and an orifice, a conduit, containing said second valve and orifice, interconnecting said directional valve with said stopping means, said second valve preventing flow from said stopping means and said orifice restricting return flow to create a pressure difFerential to prevent sudden actuation of said stopping means when said directional valve is operated and to activate said stopping means when said directional valve is not in operation.
Claim 2
Dependent Claim
183 words
In a vehicle having a boom swingable to the side of the vehicle for supporting working implements, a brake system including a base mounted on the vehicle, a swingable boom support mounted on the base, an actuator interconnecting the base and the support for providing relative movement therebetween, means for stopping the relative movement including a selective engaging member mounted on the base and an engageable member selectively engageable by the engaging member and mounted on the support, means for controlling said engaging member comprising: a directional valve for directing flow to said actuator, an energy source, and conduits interconnecting all the above for directing flow to said actuator to swing the boom, a second valve and an orifice, a conduit, containing said second valve and orifice, interconnecting said directional valve with said stopping means, said second valve preventing flow from said stopping means and said orifice restricting return flow to create a pressure difFerential to prevent sudden actuation of said stopping means when said directional valve is operated and to activate said stopping means when said directional valve is not in operation.
Claim 3
Dependent Claim
128 words
The brake system defined in claim 1 wherein said directional valve is bidirectional for directing flow to said actuator in two directions enabling the boom to swing to either side of the vehicle, and including biasing means for maintaining said stopping means normally engaged, including: a third valve and second orifice; conduits, one pair of a valve and orifice in each, connecting each of the directional flows of said bidirectional valve with said stopping means to restrict reverse flow through one conduit when said other conduit is receiving the directional flow from said bidirectional valve to create a pressure differential sufficient to overcome said biasing means to release said stopping means when operating said actuator and to apply said stopping means when said actuator is not being operated.
Claim 4
Dependent Claim
40 words
The brake system defined in claim 2 wherein said first and second pairs of a valve and an orifice are replaced by an orifice plate capable of permitting free flow in one direction and metered flow in the opposite direction.
References Cited (Backward Citations)
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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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |