Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 7281627 | Forged chain link assembly The forged chain link assembly comprises a forged chain link having a male end and a female end which cooperates with an opposite end of an adjacent link to form a chain, each end having a bore therein which cooperates with a bore in the opposite end of an adjacent ... | 10/16/2007 |
| 6390943 | Retainer subassembly for and in combination with a master link for a chain A retainer subassembly for a master link of a chain includes a cover plate, a pair of snap rings and a strap plate. The cover plate includes a pair of stepped recesses terminating in openings adjacent the outer face of the cover plate for receiving the sp... | 05/21/2002 |
| 6387001 | Rollerless chain having sprocket-engaging pins A chain is provided for use with a pair or a series of sprockets which is generally of the roller variety. In one embodiment, inner and outer links are rotatably mounted to spaced apart pins having a large diameter and held in position on the pins by pres... | 05/14/2002 |
| 5918730 | Sludge collector chain with snap-lock pins There is provided a non-metallic sludge collector chain comprising at least one center block link comprising a first bore at a first end of the center block link and a second bore at a second end of the center block link, at least one insert sidebar compr... | 07/06/1999 |
| 5305594 | Chain structure A chain structure is provided which includes a base plate having a pair of integral cylinders extending from one side. A connecting plate has a pair of elliptically contoured apertures at respective ends adapted to receive the corresponding cylinders. Eac... | 04/26/1994 |
| 5299416 | Chain connector A link for connecting a chain. The link has a first outer chain plate, a first pin, a second pin, and a second outer chain plate. The first outer chain plate has two circular holes. The pin has, at a first end, an enlarged flat head and, at a second end, ... | 04/05/1994 |
| 5201171 | Method and apparatus for retaining a track chain joint A method and apparatus of assembling a joint of an endless track chain for track-type vehicles to prevent end play in the joint is disclosed. The joint includes a pair of links and a cylindrical pin. Each link includes a laterally outwardly offset outboar... | 04/13/1993 |
| 5151066 | Streamline chain A chain comprises a plurality of pairs of outer and inner chain plates linked by rollers and pins, each chain plate being configured as a rectangle which has a protuberant arched portion on each transverse end thereof, and each chain plate having blade po... | 09/29/1992 |
| 4863418 | Non-metallic chain including wound composite chain links and molded pins A link assembly for a lightweight, non-metallic, conveyor or load transmission chain having significantly greater strength and other performance improvements compared to previous non-metallic chain links is disclosed. Each link assembly includes a pair of... | 09/05/1989 |
| 4838623 | Connector with spring retention device An end connector for double-pin track shoes or the like receives a pair of pins having arcuate grooves therein. The connector includes pin receiving openings having small diameter pin engaging arcuate surfaces, and large diameter arcuate grooves therebetw... | 06/13/1989 |
| 4717206 | Endless chains comprised of interdigitated link elements having a Y-shaped configuration An endless chain in which there is one row of a plurality of Y-shaped link elements across the width of the chain and an adjacent row of similar elements, the spaced parallel legs of the Ys of one row having the centrally located stem of a Y-shaped link e... | 01/05/1988 |
| 4709807 | Link conveyor with inserted rods A conveyor belt formed of links, in which the links each carry on a pair of opposite parallel sides, sleeve-shaped, mutually spaced ears which are each fitted into the spaces between the ears of adjoining links, such that the interfitted ears may be artic... | 12/01/1987 |
| 4674803 | Endless chains comprised of interdigitated link elements having an H-shaped configuration An endless chain in which there is one row of a plurality of H-shaped link elements across the width of the chain and an adjacent row of similar elements, the legs of the Hs of adjacent rows being interdigitated and provided with aligned openings which re... | 06/23/1987 |
| 4618190 | Track joint retaining apparatus Apparatus for retaining a joint of an endless track for a crawler-type vehicle is provided which includes a metal preform which is pressed into a retainer cavity surrounding and located at each of the ends of the joint of the track. The cavities are coope... | 10/21/1986 |
| 4610647 | Chain link connection A connection for use with chain links includes a main body portion which has at least one and preferably two support bars extending outwardly from each side of the main body portion, a recess or groove in the support bar adjacent its distal end spaced fro... | 09/09/1986 |
| 4272952 | Plastic chain and tubular link pin A plastic chain has a link which includes two sections formed of molded thermoplastic material. One end of each link section includes a first opening and is shaped so that when the link sections are joined, the ends will be spaced apart and the first open... | 06/16/1981 |
| 4265084 | Method and apparatus for assembly of a track chain with minimum end play PCT No. PCT/US79/00504 Sec. 371 Date July 16, 1979 Sec. 102(e) Date July 16, 1979 PCT Filed July 16, 1979 A method and apparatus for assembling an articulated track chain (10) affording controlled minimum end play, the chain (10) comprising a plurality of... | 05/05/1981 |
| 4262971 | Track chain assembly with integral pin and link A track chain construction (10) wherein a pair of link chains (11 and 12) are maintained in spaced parallel relationship by shoes (13) secured to the respective links (16,17) of the link chains. The shoes define central lugs (18) for engagement by the dri... | 04/21/1981 |
| 4227425 | Single rocker joint drive chain An inverted tooth type chain has groups of toothed links interconnected by a round rocker joint pin member extending through substantially round apertures at overlapping ends of the links. The apertures are larger in diameter than the pins to provide clea... | 10/14/1980 |
| 4202219 | Chain pin assembly with captive securing means A protective pivot pin assembly for chains, and especially conveyor chains, and a chain assembly incorporating that pin assembly. The pin includes a collar telescoped over one end and retained by a retaining ring or other securing member. The collar has a... | 05/13/1980 |
| 4163589 | Hinge joint for track link assemblies A track link assembly including two meshed track links, one having a narrow end received in a notch in an enlarged end in the other, aligned bores in the links, a hinge pin received in the bore for pivoting the links together, annular grooves at opposite ... | 08/07/1979 |
| 4099424 | Chain drive A chain drive wherein a chain is formed from a plurality of one-piece roller links each having an enlarged diameter central roller with angularly upwardly and outwardly extending flanges at the opposed ends thereof. A reduced diameter journal projects out... | 07/11/1978 |
| 4060006 | Device for and method of affixing the ends of a substantially plastic ladder chain to make a continuous ladder chain thereof A substantially plastic ladder chain is made continuous by affixing the exposed metallic cable ends thereof to a master coupling link of stainless steel or like material. The exposed metallic cable ends of the plastic ladder chain comprising plural braide... | 11/29/1977 |
