Bizarre Patents
Pet Toilet-Like Water Disk and Food Storage
One pet-friendly inventor patented "a device for watering pets, e.g., a dog or cat." The device, he helpfully noted, "has the general shape of a toilet."
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| Number | Title | Issue Date |
| 7357177 | Restriction tolerant packer cup The present invention relates to a packer cup 5 having a deformable leading edge 20 which moves away from well bore or casing obstructions as the packer cup 5 is moved into a well bore. The anaxisymmetric deformable leading edge 20 can be... | 04/15/2008 |
| 7261153 | Packer cups A packer cup for use in sealing the interior of a pipe under pressure is described. The cup uses a bell-shaped end which has a lip of softer material which is integral with the body of the cup which is harder material. Under pressure the lip expands against the side... | 08/28/2007 |
| 7246491 | Actuator An actuator includes a hollow cylinder which has a first portion and a second portion. The inner diameter of the first portion is larger than that of the second portion. A piston is inserted in the cylinder. The actuator has a gas generator which supplies a gas into... | 07/24/2007 |
| 7096949 | Wiper plug with packer A self-retaining cementing wiper plug with a packer element has two or more steel or carbide tipped holddown fingers or slips extending radially outward from the plug for engaging the inner surface of the casing and preventing the plug from moving uphole over time a... | 08/29/2006 |
| 7040474 | Bonded clutch piston A clutch assembly is provided including a first member and a second member rotatable relative to the first member. A clutch pack is provided for frictionally engaging the first and second members. A piston chamber is provided adjacent to the clutch pack, and a pisto... | 05/09/2006 |
| 6349630 | Wobble piston and seal assembly for oil free compressor The present invention is directed to a wobble piston and seal assembly for an oil free compressor. An upwardly directed curvature is provided on a piston surface which supports the seal. The curvature is located adjacent the perimeter of the surface to im... | 02/26/2002 |
| 6213000 | Wobble piston and seal assembly for oil free compressor An improved wobble piston and seal assembly for an oil free air compressor. The piston has a seal support surface which is provided with an upwardly directed curve adjacent its perimeter. A flat annular seal is secured to the piston to be supported by the... | 04/10/2001 |
| 5974910 | Accumulator piston An accumulator piston for an automatic transmission. The piston comprises two components, the first and second being cup elements welded together with their closed ends in abutting relation. The lower cup includes a curled back portion with a radial flang... | 11/02/1999 |
| 5492053 | Bonded piston and seal assembly A piston and seal assembly that has a rigid core with an elastomeric seal bonded thereto. The core has an annular outer cylindrical edge, a forwardly facing surface and a rearwardly facing surface. The elastomeric member is bonded to the core so as to enc... | 02/20/1996 |
| 5407332 | High suction intake wiper In a priming piston loading double acting pump for high viscosity materials, the shovel plate assembly is formed of a flexible, abrasion resistant disk or cup. The disk may be made from silicon rubber and the cup may be made from a glass filled Teflon pol... | 04/18/1995 |
| 5347915 | Piston compressor for the oilfree compression of gases The piston (6) guided in a cylinder (1) has at least one split so-called trapped piston ring (10) disposed in an annular groove on the piston. The circumferential face (12) of the ring remote from the inner face (11) of the cylinder bounds in the annular ... | 09/20/1994 |
| 5284084 | Light weight piston A lightweight mud pump piston assembly for reciprocating inside of a cylinder. The piston has decreased weight because light weight materials are used to form the majority of the hub which is the heaviest part of the piston. The piston maintains its compr... | 02/08/1994 |
| 5235900 | Rotary actuator device having an annular piston rod A rotary actuator device having an annular piston rod, the device comprising at least one piston held provided with sealing means and co-operating with an annular piston rod mounted so as to be capable of moving in an annular chamber, together with means ... | 08/17/1993 |
| 5174192 | Piston, method of making the piston and piston and cylinder unit comprising the piston A piston for a door closer comprises metal cups on opposite ends of a stem. A plastics ring is a snap-fit in one of the cups and protrudes from that cup to seal against the wall of a cylinder. A groove in the side wall of the cup for receiving a rib on th... | 12/29/1992 |
| 5064359 | Annular support for a seal for a tilt piston An apparatus includes a tilt piston having a piston head. The piston head is reciprocally disposed within a cylindrical bore formed in a housing, the bore being oriented along an axis. A seal is mounted circumferentially about the piston head. The seal ha... | 11/12/1991 |
| 4866938 | Master cylinder piston with floating sealing ring recuperation valve A hydraulic master cylinder piston carries a circumferential seal ring which allows recuperation flow valving. The floating seal has a reinforcing metal girdle which prevents radial expansion and axial crushing. The seal material resists extrusion and has... | 09/19/1989 |
| 4638726 | Load bearing swab cup An improved reinforcement cage assembly for use in the manufacture of a load lifting swab cup wherein the swab cup includes an elastomeric material bonded to the reinforcement cage assembly. The reinforcement cage assembly includes a metal base assembly a... | 01/27/1987 |
| 4441551 | Modified rotating head assembly for rotating blowout preventors Improvements in the rotating head assembly of a rotating blowout preventor. The rotating head assembly includes a stripper rubber which has an upper annular area attached to the lower annular end of a metal support member. The support member extends upwar... | 04/10/1984 |
| 4319518 | Well swab cups A swab cup for oil wells is provided which comprises means by which the elastic side walls of the cups can be radially expanded almost throughout their entire length. The oil well swab cup has a substantially cylindrical uniform wall thickness resilient a... | 03/16/1982 |
| 4317408 | Wear resistant pump packing cup A packing is provided with a multilayered construction and a cup-like shape. The packing is configured to be carried in a packing holder for reciprocating motion within a pump cylinder. Some of the layers in the packing terminate on the convex face of the... | 03/02/1982 |
| 4317407 | Swab cup having an internal reinforcing member A well swab cup has an annular bushing for supporting a plurality of longitudinally extending wire reinforcing members within an elastomeric cup-like body. The reinforcing members are supported by a base cup around the lower portion of the bushing and ext... | 03/02/1982 |
| 4265459 | Swab cup reinforcing member support A well swab cup has an annular bushing for supporting a plurality of longitudinally extending reinforcing members within an elastomeric cup like body. The reinforcing members are supported around the periphery of the bushing and extend upward to a mid-por... | 05/05/1981 |
| 4254962 | Swab cup having long and short reinforcing members A well swab cup has an annular bushing for supporting a plurality of longitudinally extending wire reinforcing members within an elastomeric cup like body. The reinforcing members are supported in a base cup around the lower portion of the bushing and ext... | 03/10/1981 |
| 4165084 | Reciprocating pump packing A packing for a reciprocating pump comprises a resilient body of elastomeric material with a cup-like shape and includes a plurality of flat cantilevered spring members embedded within the annular wall of the body. The spring members provide support for t... | 08/21/1979 |
| 4106182 | Method of manufacturing an oilwell swab cup An oilwell swab cup is formed by clamping a plurality of vertical wire members in a circular U-shaped cup and molding an elastomeric material around the wires and cup.... | 08/15/1978 |
| 4099451 | Oilwell swab cup An oilwell swab cup is formed by clamping a plurality of vertical wire members in a circular U-shaped cup and molding an elastomeric material around the wires and cup.... | 07/11/1978 |
| 4081185 | Oil well swab cup An oil well swab cup with improved wear characteristics utilizes a single integral reinforcing structure featuring a wear surface forming a substantial portion of the external surface of the cup.... | 03/28/1978 |
