# US 8,770,502 B1 · Demolition machine retrofit method and apparatus and demolition method

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- Number: US 8,770,502 B1
- Document ID: US8770502B1
- Status: Granted
- Kind: B1
- Application number: 13/158,888
- Filed: 2011-06-13
- Granted: 2014-07-08
- Earliest claimed: 2010-06-14
- Assignees: Company Wrench, Ltd.
- Applicants: Brad Hutchinson
- Inventors: Brad Hutchinson
- Web page: https://patentgrep.com/patent/US8770502B1

## CPC

- B02C 21/026: {self-propelled}
- E02F 3/38: Cantilever beams {, i.e. booms;, e.g. manufacturing processes, forms, geometry or materials used for booms (for booms with cable suspension arrangements E02F9/14 takes precedence)}; Dipper-arms {, e.g. manufacturing processes, forms, geometry or materials used for dipper-arms}; Bucket-arms {(E02F3/34 takes precedence)}
- E02F 3/965: {of metal-cutting or concrete-crushing implements (shearing devices B23D17/00; wrecking of buildings, e.g. tools therefor, E04G23/08)}
- Y10T 29/49716: Converting
- B02C: CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN ({household tools and machines for pulverising foodstuffs, e.g. coffee and spice mills A47J42/00; pharmaceutical mortars A61J3/02; mechanical processing of refuse and garbage B03B9/06; dressing mould materials by grinding B22C5/04}; obtaining metallic powder by crushing, grinding or milling B22F9/04; {recovery of plastics by disintegrating B29B17/00; crushing raw materials in starch making C08B30/02; beaters for papermaking D21D1/02; crushing devices specially for transport in mines E21F13/002; slag crushing devices F23J1/00; fuel milling devices in combustion apparatus F23K1/00; household devices for crushing coal F24B15/02; ice disintegrating devices F25C5/02})
- E02F: DREDGING; SOIL-SHIFTING (winning peat E21C49/00)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

The invention may be described as a shear tool or concrete pulverizer retrofit method, a hybrid demolition machine, such as one resulting from such a method, and a demolition method that may be carried out using such a demolition machine.

## Claims

### Claim 1

A demolition method comprising bringing onto a demolition site a retrofitted shearing demolition machine, said retrofitted shearing demolition machine being a relatively lighter shearing demolition machine having a weight less than 50,000 pounds retrofitted with a shearing head that is adapted to be attached to a relatively heavier shearing demolition machine having a weight greater than 80,000 pounds; and operating said retrofitted shearing demolition machine at said demolition site so as to cut and remove scrap therefrom.

### Claim 2 (depends on 1)

The demolition method according to claim 1, wherein said shearing head weighs less than about 3,000 pounds and is replaced with a shearing head weighing more than about 3,000 pounds.

### Claim 3 (depends on 1)

The demolition method according to claim 1, further comprising
a. obtaining (1) a relatively heavier shearing demolition machine having a relatively heavier machine boom, a relatively heavier machine arm, and a relatively larger shearing head and (2) a relatively lighter shearing demolition machine having a relatively lighter machine boom and relatively lighter machine arm, and a relatively smaller shearing head; and, without respect to order,
b. removing said relatively heavier machine arm, and relatively larger shearing head from said relatively heavier shearing demolition machine; followed by
c. reconfiguring said relatively heavier machine arm and relatively larger shearing head and attaching said relatively heavier machine arm and relatively larger shearing head to said relatively lighter machine boom of said relatively smaller shearing demolition machine, so as to make operative said relatively heavier machine arm and relatively larger shearing head on said relatively lighter shearing demolition machine.

### Claim 4 (depends on 1)

The demolition method according to claim 1, wherein said relatively heavier shearing demolition machine is at least 85,000 pounds.