Bizarre Patents
A method of swing on a swing is disclosed, in which a user positioned on a standard swing suspended by two chains from a substantially horizontal tree branch induces side to side motion by pulling alternately on one chain and then the other.
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| Number | Title | Issue Date |
| 5116391 | Curved surface rubbing apparatus A polishing apparatus in which one of two workpieces to be polished or abraded which contact each other at respective arcuate or spherical surfaces, is placed on a fixed base and turned or fixed in a horizontal plane with the other workpiece held under pr... | 05/26/1992 |
| 5005654 | High torque hydraulic shoe bolt wrench A hydraulic shoe bolt wrench used to mount and remove shoe bolts which secure shoes to a track chain. The apparatus comprises a vertical cylinder stood upright on a frame moving on a work table, a main frame secured to a piston rod of the vertical cylinde... | 04/09/1991 |
| 4881365 | Assembly apparatus for truck links An apparatus for assemblying link chains of the type having paired links joined together with cross pins joining successive pairs of links longitudinally as chain links having a pitch corresponding to the distance between successive cross pins connecting ... | 11/21/1989 |
| 4869417 | Automatic build-up welding machine for track rollers An automatic build-up welding machine for repair of workpieces such as track rollers. The machine requires no operator in charge during the welding operation. The apparatus comprises a device including a pair of guides, and a switch box connected adjustab... | 09/26/1989 |
| 4805826 | Slag removing apparatus for pad-welding machine Described herein is a slag removing apparatus suitable for use on a padi-welding machine, which permits automation of the pad-welding operation and which essentially includes: a C-shaped roller holder located beneath a movable welding torch and provided w... | 02/21/1989 |
| 4718228 | Apparatus for displacing a line of track chain An apparatus for displacing a line of track chain is disclosed which is employable for the purpose of disassembling, assembling, or reassembling the chain. A guide table for guiding movement of the chain is adapted to tilt only in the upward direction tog... | 01/12/1988 |
| 4622451 | Apparatus for rebuilding worn shoe grouser for track chain An improved apparatus for rebuilding worn shoe grouser for track chain by welding operation is disclosed. The worn part of shoe is cut off and replacement lug is placed on grouser so that the welding end face of the former comes in tight contact with the ... | 11/11/1986 |
| 4621491 | Method of discriminating fitting pressure for links on a track press Method to properly discriminate fitting pressure of articulated track links. Loading pressure in the ram of a track press is compared with both the lower and upper limit pressure values which are prescribed with reference to the range of fitting pressure ... | 11/11/1986 |
| 4543818 | Seal check apparatus for lubricant-enclosure type track joints of track chains This seal check apparatus is mounted on a track press and checks the airtightness of a track joint immediately after the completion of assembly of a track chain using the track press. The apparatus comprises a base assembly mounted on the track press; a v... | 10/01/1985 |
| 4531355 | Jig for assembling a track chain A jig is disclosed for assembling a track chain which includes pin adapters and bushing adapters attached detachably to tool bars. Each adapter is provided with an outer cylinder, an inner cylinder received slidably in the outer cylinder, a biasing device... | 07/30/1985 |
| 4233487 | Metal build-up apparatus with improved cooling means A first contact joint screwed to the open end of a lubrication oil passage bore within the shaft of a track roller whose surface is to be rebuilt by welding material thereto, bears cooling medium inlet and outlet ports, bears an intake tube whose length i... | 11/11/1980 |
| 4103138 | Apparatus for build-up welding with cooling of a sealed and lubricated track link A method and apparatus for feeding coolant to the interior of a connecting pin during build-up welding of a track link assembly, for protecting the peripheral seal members of the connecting pin from the welding heat, comprising a coolant charging and disc... | 07/25/1978 |
