Parker-hannifin Corporation

Erwin L Schaub

Frank J Viola

Lawrence H Burke

Bernard C Sharp

Raymond J Evans

A clamping band for hoses and other cylindrical objects consists of a flat metal strap having a repetitive pattern configuration to provide desired amounts of elastic and plastic stretch capability and a pawl and tooth connection for adjustably joining the ends of the strap. In all embodiments the strap includes apertures evenly distributed throughout the circumference of the band to achieve desired stress/strain characteristics. In certain embodiments the apertures comprise circular punched holes and the strap may further include transverse or circumferentially extending slits to form the desired pattern, suitable for high volume manufacturing techniques.

Spring band clamp

A windshield wiper assembly includes a flexible wiper element and a semi-rigid backing strip, the wiper element having a curved roller back configuration to maintain the point of contact with the backing strip substantially directly above the wiper lip to reduce the force necessary to flip the wiper element upon reversal of wiping motion. The wiper element includes an involute tooth and head to retain the wiper element in the backing strip and to allow relatively unrestricted floating movement therein.

Roller back wiper

A blade fuse includes parallel blades (12 and 14) secured in a body (16). A fusible link (42) welded to the blades is located in a cavity (20) of the body that is covered by a window (61). The blade fuses are assembled by blanking the fusible element from a ribbon (90) and translating it into a fuse subassembly (64). Tabs (50 and 52) secure the fusible element in the subassembly (64) until it is spot welded to blades 12 and 14. The window (61) is then blanked and translated to cover cavity (20) and secured by ultrasonic welding. A connector strip (76) is then blanked from between blades (12 and 14) to provide the blade fuse.

Blade fuse manufacturing method

An electric motor driven portable air compressor consists of a reciprocating piston and cylinder arrangement with an intake throttling valve operative to unload the compressor above a predetermined pressure level. The throttling valve is a spring loaded plunger responsive to compressor output to close one of two inlet openings to reduce the charge of air in the cylinder. A stainless steel intake leaf spring is disposed between the cylinder and a two part die cast housing and is responsive to cylinder suction for control of the compressor.

Dual stage air compressor

Blade fuse and manufacturing method

A pipe restraint device that will prevent pressure-induced separation of cast iron soil pipes or the like joined by a sealing coupling comprises at least one stiff yet forceably springable rod having lengths thereof curved to substantially the outside curvature of the pipe and forming two coils spaced apart for encircling respective pipe surfaces at opposite sides of the sealing coupling, with end portions of the rod or rods arranged in oppositely directed first and second pairs defining a contractable region of the coils; and structures including at least one rigid strut bracket formed to bridge the sealing coupling axially are engaged with the pairs of rod end portions for displacing them relative to one another substantially tangentially under great tension and holding them so displaced in immovably tight engagement upon the pipe surfaces. The coils can be formed by curved lengths of a single rod, or of two separate rods; or by two or more rods each prebent to a U shape or a closed loop form providing two curved lengths, with a rigid strut plate joining portions of these rods away from the strut bracket. Portions of the curved lengths away from the strut bracket are restrained axially by one or more tying members that bridge a sealing coupling and have edge channels underlying the rods. Such tying members in some forms serve also as the gasket confining shield of a pipe joint sealing coupling.

Growing community of inventors

Manhasset, NY, United States of America

Erwin L Schaub