Patent US3989301A successfully refreshed from Google Patents.
US3989301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for adjusting rotating angle of vessel of dump truck
Assignee: Komatsu Ltd
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Filing: 1975-03-10
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Granted: 1976-11-02
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Expires: 1995-03-10
Abstract
Abstract A device for adjusting the rotating angle of a vessel of a dump truck which includes a detent having a guide recess, which is pivotally connected to the vehicle body said detent being connected to a spool of a control valve operated by an operating lever. An arm is pivotally connected to the vehicle body and has a cam follower journaled therein, and another arm is secured to the rod of a cylinder and has a bolt which is secured to said another arm and is adjustable in height. Thus, the shock is absorbed when the vessel is travelling upwards and is stopped.
Inventors
- 👤 Haruhiko Umeda
- 👤 Hiroshi Ito
- 👤 Tadatoshi Mizuno
- 👤 Yoshiaki Harita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:25
CPC Classifications
B; B60; B60P; B60P1/00; B60P1/04; B60P1/16; B60P1/20; B60P1/28; B60P1/283
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
158 words
A device for adjusting the rotating angle of a vessel of a dump truck, comprising a detent means having a cam portion with a guide recess therein, said detent means being pivotally connected to the vehicle body; a control valve, said detent being connected to a valve spool of said control valve, said control valve being operated by an operating lever connected to said valve spool; a first arm pivotally connected to the vehicle body and having a cam follower thereon, said first arm being urged by a spring to engage said cam follower with the cam portion of said detent means; a second arm fixedly secured to a piston rod of a cylinder for rotating said vessel; and lifting means secured to said second arm for raising said first arm when said cylinder is extended to release the guide recess from the cam follower and allow the cam follower to again engage with the said cam portion.
Claim 2
Independent Claim
158 words
A device for adjusting the rotating angle of a vessel of a dump truck, comprising a detent means having a cam portion with a guide recess therein, said detent means being pivotally connected to the vehicle body; a control valve, said detent being connected to a valve spool of said control valve, said control valve being operated by an operating lever connected to said valve spool; a first arm pivotally connected to the vehicle body and having a cam follower thereon, said first arm being urged by a spring to engage said cam follower with the cam portion of said detent means; a second arm fixedly secured to a piston rod of a cylinder for rotating said vessel; and lifting means secured to said second arm for raising said first arm when said cylinder is extended to release the guide recess from the cam follower and allow the cam follower to again engage with the said cam portion.
Claim 3
Dependent Claim
28 words
The device of claim 1 wherein said lifting means is adjustable in height whereby said first arm is raised at a predetermined angle of rotation of said vessel.
Claim 4
Dependent Claim
18 words
The device of claim 2 wherein said lifting means comprises a bolt screw threaded into said second arm.
Claim 5
Dependent Claim
25 words
The device of claim 2 wherein said lifting means comprises a plate member with a slot therein secured with a bolt to said second arm.
Claim 6
Dependent Claim
22 words
The device of claim 2 wherein said lifting means comprises a disk member eccentrically secured with a bolt to said second arm.
Claim 7
Independent Claim
186 words
A device for adjusting the rotating angle of a vessel of a dump truck, comprising a first arm pivotally connected to the vehicle body and having a detent means composed of a cam portion with a guide recess formed therein; a second arm fixedly secured to a piston rod of a cylinder for rotating said vessel; a control valve operated by an operating lever connected to one end of a valve spool of said control valve; a member directly connected to the other end of said valve spool and having a cam follower thereon; a spring means provided between the vehicle body and one end of said first arm for urging said first arm to engage said cam follower with the cam portion of said detent means formed in said first arm; and lifting means secured to said second arm for raising the end of said first arm opposite to said one end thereof connected to said spring means when said cylinder is extended to release the guide recess from the cam follower and allow the cam follower to again engage with the said cam portion.
Claim 8
Independent Claim
186 words
A device for adjusting the rotating angle of a vessel of a dump truck, comprising a first arm pivotally connected to the vehicle body and having a detent means composed of a cam portion with a guide recess formed therein; a second arm fixedly secured to a piston rod of a cylinder for rotating said vessel; a control valve operated by an operating lever connected to one end of a valve spool of said control valve; a member directly connected to the other end of said valve spool and having a cam follower thereon; a spring means provided between the vehicle body and one end of said first arm for urging said first arm to engage said cam follower with the cam portion of said detent means formed in said first arm; and lifting means secured to said second arm for raising the end of said first arm opposite to said one end thereof connected to said spring means when said cylinder is extended to release the guide recess from the cam follower and allow the cam follower to again engage with the said cam portion.
Claim 9
Dependent Claim
28 words
The device of claim 6 wherein said lifting means is adjustable in height whereby said first arm is raised at a predetermined angle of rotation of said vessel.
Claim 10
Dependent Claim
18 words
The device of claim 7 wherein said lifting means comprises a bolt screw threaded into said second arm.
Claim 11
Dependent Claim
25 words
The device of claim 7 wherein said lifting means comprises a plate member with a slot therein secured with a bolt to said second arm.
Claim 12
Dependent Claim
22 words
The device of claim 7 wherein said lifting means comprises a disk member eccentrically secured with a bolt to said second arm.
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) | 1979-11-02 | 1980-05-03 | 1980-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-02 | 1984-05-03 | 1984-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-02 | 1988-05-03 | 1988-11-02 | $7700.00 | Window Closed / Lapsed |