IP Library Granted Patent US 10,493,643
Granted Patent B1
US 10,493,643 · App. 15/156,901 · Granted Dec 3, 2019

Leveled back shaver

Inventor: Matthew James Dryfhout (Frankfort, IL)
Assignee: Dryfhout Properties, LLC
B26B21/4031B26B21/4081B26B21/443B26B21/523
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Quick Facts
Patent No.
US 10,493,643
App. No.
15/156,901
Granted
Dec 3, 2019
Kind
B1
Abstract

A safety razor shaves back hair. A substrate structure at a blade end of an elongated back shaver handle opposite a grip end end holds both a blade group and a support. The blade group has a sharp blade and a guard parallel thereto. The support can be either a blunt protrusion or another blade group. The blade group and the support are spaced a tactile leverage feedback distance sufficiently wide enough to provide leverage feedback felt through the elongated back shaver handle for the user to maintain a consistent angle of the sharp blade relative to the skin surface when an arm of the user reaches the elongated back shaver handle to the user's backside during shaving movement over a shoulder blade peak or a spine depression.

Claims (28)

1. A safety razor for shaving back hair on backside skin of a user, comprising:

an elongated back shaver handle comprising a grip at a handle end of the elongated back shaver handle and a blade attachment at a blade cartridge end of the elongated back shaver handle, the blade cartridge end of the elongated back shaver handle located opposite the handle end;

a blade group comprising a sharp blade having a planar side and a guard having a planar body parallel to the planar side of the sharp blade;

a blunt protrusion; and

a substrate structure having a back surface operatively coupled to the blade cartridge end of the elongated back shaver handle, wherein the substrate structure has a front surface that is attached to the blade group and the blunt protrusion on the front surface of the substrate structure with the blade group and the blunt protrusion consecutively spaced a tactile feedback distance of at least about 25.4 millimeters measured between an edge of the guard and an apex of the blunt protrusion both the edge of the guard of the blade group and the apex of the blunt protrusion configured to engage the skin.

2. A safety razor according to claim 1 , wherein a height respectively from the edge of the guard of the blade group and the apex of the blunt protrusion to the front surface of the substrate structure is at least 0.381 centimeters.

3. A safety razor according to claim 1 , wherein the guard of the blade group comprises an outer comb parallel to the sharp blade on a leading side of the sharp blade.

4. A safety razor according to claim 3 , wherein the guard of the blade group further comprises an inner guard parallel to the sharp blade on a trailing side of the sharp blade opposite the outer comb.

5. A safety razor according to claim 1 , wherein the front surface of the substrate structure is adapted to removably connect to at least the blade group.

6. A safety razor according to claim 5 , wherein the front surface of the substrate structure is adapted to removably connect to the blunt protrusion.

7. A safety razor according to claim 6 , wherein the front surface of the substrate structure is adapted to removably connect to another blade group.

8. A safety razor according to claim 5 , wherein the front surface of the substrate structure comprises a first groove adapted to removably connect to at least the blade group.

9. A safety razor according to claim 8 , wherein the front surface of the substrate structure further comprises a second groove adapted to removably connect the blunt protrusion inserted therein and configured parallel to the first groove spaced the tactile feedback distance.

10. A safety razor according to claim 8 , wherein the substrate structure comprises lock and release attachments at each of the first and second grooves adapted to removably connect to at least the blade group in the substrate structure.

11. A safety razor according to claim 1 , wherein the back surface of the substrate structure comprising an attachment for the operative coupling to the blade cartridge end of the elongated back shaver handle.

12. A safety razor according to claim 1 , wherein the tactile feedback distance is greater than about 35 millimeters.

13. A safety razor according to claim 12 , wherein the tactile feedback distance is greater than about 39 millimeters.

14. A safety razor according to claim 1 , wherein the blunt protrusion comprises a disposable lubrication strip.

15. A safety razor according to claim 1 , wherein the blunt protrusion comprises soap.

16. A safety razor according to claim 1 , wherein the blunt protrusion is attached by being integral with the substrate structure.

17. A safety razor for shaving hair on skin of a user, comprising:

a handle;

a blade group comprising a sharp blade having a planar side and a guard having a body parallel to the planar side of the sharp blade;

a blunt protrusion; and

a substrate structure having a back surface operatively coupled to an end of the handle, wherein the substrate structure has a front surface that is attached to the blade group and the blunt protrusion on the front surface of the substrate structure with the blade group and the blunt protrusion consecutively spaced apart a tactile discrimination distance of at least about 25.4 millimeters measured between an edge of the guard and an apex of the blunt protrusion both the edge of the guard of the blade group and the apex of the blunt protrusion configured to engage the skin.

18. A safety razor according to claim 17 , wherein the tactile discrimination distance is greater than about 35 millimeters.

19. A safety razor according to claim 18 , wherein the tactile discrimination distance is greater than about 39 millimeters.

20. A safety razor according to claim 17 , wherein the blunt protrusion is attached by being integral with the substrate structure.

Assignments (8)
COURT ORDER Recorded Jul 29, 2025
From: BAKBLADE LIMITED
To: DRYFHOUT ENTERPRISES, LLC; DRYFHOUT PROPERTIES, LLC; DRYFHOUT, MATTHEW, MR.; DRYFHOUT, ANGELINA, MRS.
Reel/Frame 071897/0182 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 29, 2025
From: DRYFHOUT ENTERPRISES, LLC; DRYFHOUT, MATTHEW, MR.; DRYFHOUT, ANGELINA
To: DRYFHOUT PROPERTIES, LLC
Reel/Frame 071947/0085 →
LIEN Recorded May 22, 2025
From: BAKBLADE LIMITED
To: DRYFHOUT ENTERPRISES, LLC; DRYFHOUT PROPERTIES, LLC; DRYFHOUT, MATTHEW, MR.; DRYFHOUT, ANGELINA, MRS.
Reel/Frame 071355/0338 →
LIEN Recorded Feb 6, 2025
From: BAKBLADE LIMITED
To: DRYFHOUT ENTERPRISES, LLC; DRYFHOUT PROPERTIES, LLC; DRYFHOUT, MATTHEW, MR.; DRYFHOUT, ANGELINA, MRS.
Reel/Frame 070140/0887 →
LIEN Recorded Oct 7, 2024
From: BAKBLADE LIMITED
To: DRYFHOUT ENTERPRISES, LLC; DRYFHOUT PROPERTIES, LLC; DRYFHOUT, MATTHEW, MR.; DRYFHOUT, ANGELINA, MRS.
Reel/Frame 068818/0343 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 23, 2022
From: DRYFHOUT, MATTHEW; DRYFHOUT, ANGELINA; DRYFHOUT ENTERPRISES LLC; DRYFHOUT PROPERTIES LLC
To: BAKBLADE LIMITED
Reel/Frame 061864/0258 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 12, 2019
From: DRYFHOUT ENTERPRISES, LLC; DRYFHOUT, MATTHEW JAMES
To: DRYFHOUT PROPERTIES, LLC
Reel/Frame 048583/0526 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 17, 2016
From: DRYFHOUT, MATTHEW JAMES
To: DRYFHOUT ENTERPRISES, LLC
Reel/Frame 038621/0217 →
Cited By (4)
US 1,126,483 US 12,202,156 US 12,280,512 US 12,491,649