# US 5,347,717 A · Chuck assembly for a disposable razor

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- Number: US 5,347,717 A
- Document ID: US5347717A
- Status: Granted
- Kind: A
- Application number: 08/147,313
- Filed: 1993-11-05
- Granted: 1994-09-20
- Earliest claimed: 1993-11-05
- Inventors: Tse-Jen Ts'ai
- Web page: https://patentgrep.com/patent/US5347717A

## CPC

- B26B 21/225: {the changeable unit being resiliently mounted on the handle}
- B26B 21/521: {Connection details, e.g. connection to razor heads}
- B26B: HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR (for harvesting A01D; for horticulture, for forestry A01G; for butchering or meat treatment A22; for manufactering or repairing footwear A43D; nail clippers or cutters A45D29/02; kitchen equipment A47J; {vegetable slicers, julienne cutters and similar devices and holders therefor, B26D3/28}; for surgical purposes A61B; for metal B23D; cutting by abrasive fluid jets B24C5/02; plier-like tools with cutting edges B25B7/22; pincers B25C11/02; handles for hand implements, in general B25G; guillotine-type cutters B26D; {perforating by non-mechanical means, e.g. by fluid jet, B26F1/26}; for erasing B43L19/00; for textile materials D06H)

## Abstract

The chuck assembly includes a chucking device having two pawls controlled by a press rod to move toward each other for loading a blade cartridge, a spring worked to return the pawl to its former position after the loading of the blade cartridge permitting the blade cartridge to be retained to the pawls, and a spring-supported balance rod on which the loaded blade cartridge is balanced.

## Claims

### Claim 1

A chuck assembly fastened to a handle to hold a blade cartridge, comprising:
a housing formed of a bottom shell and a top shell covered on said bottom shell, said bottom shell comprising two mounting holes; said top shell comprising a button hole on the rear end, a front opening on a front wall thereof, a substantially U-shaped frame on the inside defining a first chamber inside said U-shaped frame and a second chamber outside said U-shaped frame, two posts disposed within said second chamber and respectively fitted into said mounting holes on said bottom shell;
a chucking device retained inside said housing to hold a blade cartridge outside said housing, said chucking device comprising a press rod extended out of said button hole, a U-shaped rod connected to said press rod and disposed inside said second chamber around said U-shaped frame, two symmetrical pawls disposed on two opposite ends of said U-shaped rod and extended out of said housing through said front opening, two bevel blocks projected from said U-shaped rod on two opposite sides and respectively stopped at said front wall of said top shell inside said housing;
first spring means fastened inside said housing to retain said chucking device in position; and
wherein when said press rod is pressed, said bevel blocks are moved forwards and rubbed against said front wall, causing said pawls moved toward each other for loading said blade cartridge on said pawls permitting said blade cartridge to be retained to said pawls after said press rod is released from the pressure and said chucking device is moved back to its former position by said first spring means.

### Claim 2 (depends on 1)

The chucking assembly of claim 1 wherein said blade cartridge comprises two hooks spaced on a back wall thereof and respectively engaged with said pawls when loaded.

### Claim 3 (depends on 1)

The chuck assembly of claim 1 further comprising second spring means fastened inside said first chamber, and a balance rod supported on said second spring means to balance the blade cartridge being loaded on said pawls.

### Claim 4 (depends on 1)

The chuck assembly of claim 1 wherein said first spring means is a compression spring retained between the U-shaped rod of said chucking device and the U-shaped frame of said top shell.

### Claim 5 (depends on 1)

The chuck assembly of claim 1 wherein said first spring means comprises two curved plate springs bilaterally disposed inside said second chamber and retained between the U-shaped rod of said chucking device and two opposite lateral walls of said top shell.