U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Icon_funbox Quotables

"Everyone acquainted with the subject will recognize it as a conspicuous failure."

Henry Morton, president of the Stevens Institute of Technology ; Said in 1880 about the light bulb

Newsletter  PatentStorm News

Make the Most of Our Site

See this month's Top Inventors and Most Cited Patents.

Stay on top of the latest innovations by subscribing to an RSS feed.

Registered users: Manage your profile.

 

Class 74/425.5 - Variable speed


Subclass of Class 74 - Machine element or mechanism
Definition: Gearing, the worm gearing being of a structure to impart
No. of patents: 9
Last issue date: 12/06/2005


NumberTitleIssue Date
6971277Gear drive casing apparatus for enclosing a gear drive
A gear drive casing apparatus is disclosed for enclosing a gear drive used in a hygienic and sanitary environment. The gear drive casing apparatus includes a member having an external contoured surface, the member enclosing the gear drive. A further member has a fur...
12/06/2005
6645112On-demand transfer case
A torque transfer system is disclosed which is particularly well-suited for use in four-wheel drive transfer cases to establish distinct two-wheel and four-wheel drive modes as well as providing an automatic ("on-demand") four-wheel drive mode. The torque...
11/11/2003
6609440Structure of a variable transmission device
A structure of a variable transmission device includes an input shaft driven by a motor to perform alternate rotation having a gear on a middle portion, an output shaft having a pair of gears secured to the upper and lower ends respectively and a speed ch...
08/26/2003
6257086Toy gear box and a gear case therefor
A toy gear box having a gear case in which a worm wheel and a gear wheel having axes of rotation transversely to each other are in operative engagement with each other with a specific gear ratio. The gear wheel is replaceable, and at least one second gear...
07/10/2001
4852479Postage meter having a worm gear drive
This invention relates to a postage meter having a plurality of worm gears for adjusting the rotational position of postage print wheels. Each worm gear selectively moves a rack which is an engagement with a postage print wheel so as to provide rotational...
08/01/1989
4831889Conical worm gear for a multi-speed bicycle drive mechanism
A multi-speed chainless drive mechanism for a cycle-type vehicle comprises a drive shaft rotatably driven by a pedal actuated gear train. The drive shaft, which includes a universal joint, extends away from the gear train. The drive mechanism also compris...
05/23/1989
4567783Multi-angle pinion and gear power transmission
A power transmission is disclosed, including a single input pinion or worm and multiple gears and output shafts associated therewith such that two of the latter shafts are at right angles to one another, or any other angle other than parallel. In an alter...
02/04/1986
4255980Variable ratio steering gear
The tops of the teeth of a sector gear with respect to a plane of rotation of the sector gear are located on an addendum circle which is a single circular arc having a center which is located on a neutral line and which is spaced from the center of rotati...
03/17/1981
4217793Rack and pinion type steering gear
This invention pertains to a rack and pinion type steering gear for an automobile comprising a housing; a pinion rotatably supported in said housing to receive turning effect from a steering wheel of the automobile; and a rack meshed with the pinion and s...
08/19/1980
 
Sign InRegister
Username  
Password   
forgot password?