Bizarre Patents
Pillow with retractable umbrella
A pillow assembly having a supporting assembly and a retractable umbrella assembly that is easily transportable and allows a user to support his/her head while covering their face from sunlight.
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| Number | Title | Issue Date |
| 5158008 | Light plunger piston for internal combustion engines A piston having a head with ring grooves, a skirt having hub bores, and a pin, with the following dimensions: L/D=0.45-0.8 H/D=0.25-0.5 A/D=0.3-0.5 T/D=0.45-0.8 where L=maxium length of the piston D=maximum diameter of the piston H=compression height A=maximum skir... | 10/27/1992 |
| 4730549 | Light-metal reciprocating piston A piston made of cast aluminum base alloy is provided with gudgeon pin bosses which are connected to the piston skirt by means of a frusto-conical strut which has recesses in the skirt and are specially dimensioned to leave large unsupported skirt areas t... | 03/15/1988 |
| 4228727 | Pistons A cast light metal piston has a plurality of longitudinally extending reinforcing members. These reinforcing members may be disposed at predetermined positions in the piston as cast and are designed to impart a compressive stress to the material of the pi... | 10/21/1980 |
