Accident prevention apparatus for power takeoffs

• US 4,337,841 A
• Filed: 03/07/1980
• Issued: 07/06/1982
• Est. Priority Date: 03/07/1979
• Status: Expired due to Term

• Current Assignee: Gerald S. Law
• Original Assignee: Gerald S. Law
• Inventors: Law, Gerald S.
• Primary Examiner(s): Peters, Jr., Joseph F.
• Assistant Examiner(s): Smith, Milton L.
• Application Number:
  US06/128,372
• Time in Patent Office: 851 Days
• Field of Search: 180/271, 180/274, 180/279, 180/53 R, 180/53 D, 180/14.5, 180/285, 180/284, 180/282, 180/283, 123/198 D, 123/198 DB, 200/61.41, 200/61.44, 172/3, 172/2, 172/6, 56/10.5, 56/DIG. 15, 192/129 A, 361/179
• US Class Current: 180/271
• CPC Class Codes: A01B 71/00 Construction or arrangement of setting or adjusting mechanisms, of implement or tool drive or of power take-off; Means for protecting parts against dust, or the like; Adapting machine elements to or for agricultural purposes adjusting mechanisms in general G05G
• CPC Class Codes: F16P 3/12 with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine F16P3/08 takes precedence

Abstract

Accident prevention apparatus for mounting on a machine, tractor or other apparatus having at least one moving part driven by a power source. The accident prevention apparatus comprises, in electrical circuit, an elongate contact-sensitive antenna, movement-sensitive means and means including a solenoid to cut off power from the power source.

The movement-sensitive means includes a mounting and a plate spaced apart and insulated from each other, the antenna being rooted to the mounting to extend therefrom through a hole in the plate and therebeyond to extend in the vicinity of the moving part. Contact with the antenna by the operator'"'"'s clothing causes it to touch the plate which actuates the solenoid to cut off the power to the machine or to the moving part of the machine.

Claims

1. An apparatus having at least one moving part driven through a gear box by an internal combustion engine, accident prevention apparatus comprising in electrical circuit, cut-off means to cut off transmission of power from the internal combustion engine driving the moving part so as to stop the moving part, elongated contact-sensitive means extending in the vicinity of the moving part having a portion positioned adjacent a movement-sensitive means, the cut-off means being activated when the elongated contact-sensitive means is deflected so as to cause it to touch the movement-sensitive means, the transmission cut-off means comprising at least one solenoid which on being energized in response to contact of the movement-sensitive means and the elongated contact-sensitive means mechanically moves a gear lever of the gear box to a neutral position immediately causing power from the engine to cease to be transmitted to the moving part.

2. Accident prevention apparatus according to claim 1, wherein the elongated contact-sensitive means is an antenna which is length adjustable to extend along and in the vicinity of an elongated moving part.

3. Accident prevention apparatus according to claim 2, wherein the movement-sensitive means comprises at least a mounting and a plate, the plate being spaced and insulated from the mounting and having therein defined a hole, the antenna being attached on one end mounting to extend through and beyond the hole in the plate, the plate and antenna being connected in circuit with electric current supply whereby, when the antenna is moved by contact therewith it touches the plate surrounding the hole to activate the power cut-off means to stop movement of the moving part.

4. Accident prevention apparatus according to claim 1, wherein a waterproof socket is provided in said electrical circuit to enable a second antenna and a second movement-sensitive means to be fitted longitudinally in the vicinity of the other elongated moving part.

5. Accident prevention apparatus according to claim 1, wherein the cut-off means includes a second solenoid adapted on deflection of contact-sensitive means to actuate choke means for the engine, and further including manually-resettable choke means and locking means to automatically lock the choke means in locking position.

6. Accident prevention apparatus according to claims 1, 2, 3, 4, and 5, wherein the engine is mounted on a tractor.