# US 4,391,363 A · Automatic latch for unloading auger

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- Number: US 4,391,363 A
- Document ID: US4391363A
- Status: Granted
- Kind: A
- Application number: 06/235,395
- Filed: 1981-02-18
- Granted: 1983-07-05
- Earliest claimed: 1981-02-18
- Assignees: Sperry Corporation
- Inventors: T. William Waldrop
- Web page: https://patentgrep.com/patent/US4391363A

## CPC

- B65G 21/12: to allow adjustment of position of load-carrier or traction element as a whole
- B65G: TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS (packaging B65B; handling thin or filamentary materials, e.g. paper sheets or thread, B65H; cranes B66C; portable mobile or lifting or hauling appliances, e.g. hoists, B66D; devices for lifting or lowering goods for loading or unloading purposes, e.g. fork-lift trucks, B66F9/00; emptying bottles, jars, casks, barrels or similar containers, not otherwise provided for, B67C9/00; delivering or transferring liquids B67D; filling or discharging vessels for liquefied, solidified or compressed gases F17C; pipe-line systems for fluids F17D)

## Abstract

A movable unloading auger is automatically latched and unlatched with respect to a support member by connecting a lifting winch and cable to a movable latch arm attached to the auger, thus advantageously permitting hands-off latching and unlatching operations. A latch pin is extended from the latch arm and is guided to obstruct movement of the auger relative to the support member.

## Claims

### Claim 1

In combination with a container having a movable unloading auger, the improvement comprising:
means for supporting said auger, said means being a support member connected to said container and extending therefrom;
a latch arm pivotally mounted on said auger;
a latch pin connected to said latch arm;
means for guiding said latch pin to a first obstruction position relative to said support member;
means connected for raising and lowering said auger, said means including a cable operably connected to pivot said latch arm to move said latch pin between said first position, and a second obstruction free position relative to said support member;
resilient means for urging said latch pin from said second to said first position;
means for limiting movement of said latch pin to said second position;
said latch pin being moved from said first position to said second position when the tension in said cable overcomes the force of said resilient means; and
said latch pin being moved from said second position to said first position when the force of said resilient means overcomes the tension in said cable.

### Claim 2 (depends on 1)

The apparatus of claim 1 wherein said latch pin guide includes first and second spaced apart plates mounted on said auger, each plate having relatively aligned apertures formed therein.

### Claim 3 (depends on 2)

The apparatus of claim 2 wherein said resilient means is connected to said latch pin between said plates.

### Claim 4 (depends on 1)

The apparatus of claim 1 wherein said means for limiting movement is a stop member attached to said latch pin.

### Claim 5 (depends on 1)

The apparatus of claim 1 wherein said latch arm and said latch pin are interconnected by another cable.

### Claim 6 (depends on 1)

The apparatus of claim 1 wherein said latch pin guide includes first and second spaced apart plates mounted on said auger, each plate having relatively aligned apertures formed therein, said resilient means is connected to said latch pin between said plates, said means for limiting movement is a stop member attached to said latch pin adjacent said support member, and said latch arm and said latch pin are interconnected by another cable.

### Claim 7

An agricultural grinder-mixer comprising:
an unloading auger movably connected to the mixer,
means for supporting said auger, said means being a support member connected to and extending from said mixer;
a latch arm pivotally mounted on said auger;
means connected for raising and lowering said auger relative to said support, said means being a winch and cable operably connected to pivot said latch arm;
a latch pin connected to said latch arm;
means for guiding said latch pin to a first obstruction position relative to said support member, said latch pin extended through an aperture in said guide means, said latch pin including a stop means for limiting movement of said pin in response to engagement with said guide means;
resilient means connected to said pin for engagement with said guide means and for urging said pin to said first position relative to said support member; and
means connected for moving said latch pin to a second obstruction free position relative to said support member in response to movement of said winch and cable, said means including member interconnecting said latch pin with said latch arm;
said latch pin being moved from said first position to said second position when the tension in said cable overcomes the force of said resilient means; and
said latch pin being moved from said second position to said first position when the force of said resilient means overcomes the tension in said cable.