ISOLATOR OVERTRAVEL PROTECTION FOR WALK-BEHIND FLOOR SCRAPER
First Claim
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1. A walk-behind floor stripping machine comprising:
- (a) a main body plate;
(b) a cutting head adapted for oscillatory movement relative to the main body plate and affixed to the bottom surface of the main body plate via a plurality of isolators, each isolator comprising a top plate and a bottom plate held in spaced apart relation by an elastomeric member made of a blend comprising at least 70% natural rubber and at least 20% ethylene propylene diene monomer; and
(c) a plurality of stops, each of said stops having a body portion comprising a base, a neck extending from the base, and a removable washer adapted to be attached to the end of the neck opposite the body portion, wherein the body portion is affixed to one of said main body plate and cutting head and said neck is adapted to extend through an opening in the other of said main body plate and cutting head, and wherein the base and the washer are each broader than the opening such that the base, neck and washer cooperate with surfaces surrounding the opening to permit oscillatory motion of the cutting head assembly, and limit flex and shear movement of the cutting head assembly damaging to the isolators.
1 Assignment
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Accused Products
Abstract
An improved walk-behind floor scraper incorporates a plurality of isolators between a main plate and cutting head to reduce vibration and a plurality of stops to prevent damage to the isolators.
0 Citations
15 Claims
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1. A walk-behind floor stripping machine comprising:
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(a) a main body plate; (b) a cutting head adapted for oscillatory movement relative to the main body plate and affixed to the bottom surface of the main body plate via a plurality of isolators, each isolator comprising a top plate and a bottom plate held in spaced apart relation by an elastomeric member made of a blend comprising at least 70% natural rubber and at least 20% ethylene propylene diene monomer; and (c) a plurality of stops, each of said stops having a body portion comprising a base, a neck extending from the base, and a removable washer adapted to be attached to the end of the neck opposite the body portion, wherein the body portion is affixed to one of said main body plate and cutting head and said neck is adapted to extend through an opening in the other of said main body plate and cutting head, and wherein the base and the washer are each broader than the opening such that the base, neck and washer cooperate with surfaces surrounding the opening to permit oscillatory motion of the cutting head assembly, and limit flex and shear movement of the cutting head assembly damaging to the isolators. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A walk-behind floor stripping machine comprising:
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(a) a main body plate; (b) a cutting head adapted for oscillatory movement relative to the main body plate and affixed to the bottom surface of the main body plate via a plurality of isolators, each isolator comprising a top plate and a bottom plate held in spaced apart relation by an elastomeric member made of a blend comprising at least 70% natural rubber and at least 20% ethylene propylene diene monomer; and (c) a plurality of stops, each of said stops having a body portion affixed to the bottom surface of the main body plate, said body portion having base, and a neck extending from the base through an opening in the cutting head, each of said stops further comprising a washer and a low friction plain bearing having a flange adapted to be attached to the end of the neck opposite the body portion, wherein the body portion is affixed to said main body plate and said neck is adapted to extend through an opening in the cutting head, and wherein the base, the washer and the flange are each broader than the opening such that the base, neck, washer and flange cooperate with surfaces of the cutting head surrounding the opening to permit oscillatory motion of the cutting head, and limit flex and shear movement of the cutting head damaging to the isolators, and excessive tensile displacement of the isolators. - View Dependent Claims (15)
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Specification