SEPARATE CLUTCH-BRAKE CONTROLS FOR BACKHOE

• US 3,656,595 A
• Filed: 09/22/1970
• Issued: 04/18/1972
• Est. Priority Date: 07/15/1968
• Status: Expired due to Term

• Current Assignee: Kenneth W. Gethmann, Russell J. Dye
• Original Assignee: Kenneth W. Gethmann, Russell J. Dye
• Inventors: Gethmann, Kenneth W., Dye, Russell J.
• Primary Examiner(s): Wyche, Benjamin W.
• Application Number:
  US05/074,460
• Time in Patent Office: 574 Days
• Field of Search: 192/13A,13,83,4A,4R
• US Class Current: 192/13.00R
• CPC Class Codes: B60T 1/06 acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels
• CPC Class Codes: B60T 11/103 in combination with other control devices conjoint control of brake system and at least another sub-unit B60W10/188
• CPC Class Codes: B60T 13/50 Brakes applied by springs or weights and released by vacuum

Abstract

A clutch and brake means for a backhoe adapted to permit the operator to disengage the clutch while simultaneously applying the backhoe brakes. The backhoe intake manifold is connected to a vacuum operated control means by means of a vacuum line in which is interposed a valve means. The vacuum operated control means includes a vacuum chamber having a diaphragm movably mounted therein which is connected to a rod extending therefrom. The rod has a spring means connected thereto which resists the movement of the rod in one direction when the valve is operated to apply a vacuum on the diaphragm. The rod is connected to a linkage which is connected to the clutch-brake pedal so that when a vacuum is applied to the diaphragm, the clutch is engaged while the brake is disengaged. When the vacuum is removed from the diaphragm, the spring means on the rod causes the rod to move the linkage so that the pedal is depressed thereby disengaging the clutch and applying the brakes on the backhoe.

Claims

1. In combination, a vehicle having an engine, a brake means, and a brake pedal which engages the brake means when depressed, a first valve means operatively connected to the intake manifold vacuum of the engine, a manual actuator connected to said first valve means and having no operative connection with said pedal, a vacuum housing having a diaphragm movably mounted therein, said housing being operatively connected to said first valve means whereby said valve can be operated by said actuator to create a vacuum in said housing thereby moving said diaphragm in one direction in said housing, a rod means extending into said housing and being secured at one end to said diaphragm and being movable therewith, a spring means connected to said rod means and yieldably resisting the movement of said rod means and diaphragm in said one direction, the other end of said rod means being pivotally connected to a pivotal linkage means, said pivotal linkage means being connected to a link means which is connected to the brake pedal, said spring means moving said rod means in a direction opposite to said one direction when said first valve means is manually operated to release the vacuum in said housing, the movement of said rod means in said opposite direction causing the pivotal movement of said linkage means and causing said link means to depress said brake pedal to engage the brake means, the operation of said first valve means causing said brake pedal to be depressed by said spring means without the operator physically moving the pedal so that the operator can cause said brake pedal to be depressed from a position remote therefrom, said link means being comprised of a first link arm connected at one end to said pivotal linkage means and pivotally connected at its other end to a pivotal cam plate and a second link arm pivotally connecting said cam plate and said brake pedal, said cam plate being operatively connected to the vehicle clutch whereby the depressing of said brake pedal engages said brake means and disengages the vehicle clutch, said first link arm having an elongated slot formed therein whicH slidably receives a pin means extending from said pivotal linkage whereby said pedal can be depressed without pivotally moving said pivotal linkage means.

2. The combination of claim 1 wherein said pivotal linkage means is comprised of a substantially inverted V-shaped member pivotally movable about its upper end, said rod means being pivotally connected to one of the legs of the V-shaped member at the lower end thereof, said pin means extending from the lower end of the other leg of the V-shaped member.

3. The combination of claim 1 wherein said first link arm is length adjustable.

4. In combination, a vehicle having an engine, a clutch means, a brake means, and a clutch-brake pedal which causes the engagement of the brake means and the disengagement of the clutch means when depressed, a first valve means operatively connected to the intake manifold vacuum of the engine, a manual actuator connected to the said first valve means and having no operative connection with said clutch-brake pedal, a vacuum housing having a diaphragm movably mounted therein, said housing being operatively connected to said first valve means whereby said valve can be operated by said actuator to create a vacuum in said housing thereby moving said diaphragm in one direction in said housing, a rod means extending into said housing and being secured at one end to said diaphragm and being movable therewith, a spring means connected to said rod means and yieldably resisting the movement of said rod means and diaphragm in said one direction, linkage means operatively connecting the other end of said rod means and said clutch-brake pedal, said spring means moving said rod means in a direction opposite to said one direction when said first valve means is manually operated to release the vacuum in said housing, the movement of said rod means in said opposite direction causing said linkage means to depress said clutch-brake pedal to engage the brake means and disengage the clutch means, the manual operation of said first valve means by said actuator causing said clutch-brake pedal to be depressed by said spring means without the operator physically moving the pedal so that the operator can cause said pedal to be depressed from a position remote therefrom.

5. The combination of claim 4 wherein said vehicle includes an operator'"'"''"'"'s station which faces forwardly with respect to the vehicle and includes a backhoe operator'"'"''"'"'s station which faces rearwardly with respect to the vehicle, said clutch-brake pedal being positioned at said operator'"'"''"'"'s station, said actuator being positioned at said backhoe operator'"'"''"'"'s station so that said clutch-brake pedal can be controlled by said first valve means from said backhoe operator'"'"''"'"'s station.