Patent US5785303A successfully refreshed from Google Patents.
US5785303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring core for mattress or seat cushion
Assignee: Individual
•
Filing: 1996-08-09
•
Granted: 1998-07-28
•
Expires: 2016-08-09
Abstract
Abstract This invention relates to a spring core of leaf springs for mattresses and seat cushions. According to the invention, the spring core comprises at least two plates opposite each other, having a multiplicity of spring elements broken out of holes. Preferably, the spring elements of the opposite plates are mirror-images.
Inventors
- 👤 Franz Kutschi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:12
CPC Classifications
A; A47; A47C; A47C23/00; A47C23/02; F; F16; F16F; F16F1/00; F16F1/02; F16F1/18
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
40 words
A spring core for a mattress or seat-cushion consisting of: two plates, each of said plates having spring elements bent out of a multiplicity of openings, wherein the spring elements of one plate oppose spring elements of an opposite plate.
Claim 2
Dependent Claim
40 words
A spring core for a mattress or seat-cushion consisting of: two plates, each of said plates having spring elements bent out of a multiplicity of openings, wherein the spring elements of one plate oppose spring elements of an opposite plate.
Claim 3
Dependent Claim
24 words
The spring core according to claim 1 wherein spring elements of one plate are bent as mirror-images of spring elements of an opposite plate.
Claim 4
Dependent Claim
29 words
The spring core according to claim 2 wherein ends of spring elements of one plate are shaped as sockets with edges formed so as to center an opposite plate.
Claim 5
Dependent Claim
16 words
The spring core according to claim 3 wherein the plates are made of a fiber-reinforced plastic.
Claim 6
Dependent Claim
26 words
The spring core according to claim 4 wherein the spring core is reinforced in places subject to especially heavy wear by insertion of reinforcement spring elements.
Claim 7
Dependent Claim
16 words
The spring core according to claim 2 wherein the plates are made of a fiber-reinforced plastic.
Claim 8
Dependent Claim
26 words
The spring core according to claim 6 wherein the spring core is reinforced in places subject to especially heavy wear by insertion of reinforcement spring elements.
Claim 9
Dependent Claim
26 words
The spring core according to claim 2 wherein the spring core is reinforced in places subject to especially heavy wear by insertion of reinforcement spring elements.
Claim 10
Dependent Claim
43 words
A spring core for a mattress or seat-cushion comprising: at least two plates, each plate having rows and columns of spring elements bent out of a multiplicity of openings, wherein the spring elements of one plate oppose spring elements of an opposite plate.
Claim 11
Dependent Claim
43 words
A spring core for a mattress or seat-cushion comprising: at least two plates, each plate having rows and columns of spring elements bent out of a multiplicity of openings, wherein the spring elements of one plate oppose spring elements of an opposite plate.
Claim 12
Dependent Claim
24 words
The spring core according to claim 9 wherein spring elements of one plate are bent as mirror-images of spring elements of an opposite plate.
Claim 13
Dependent Claim
29 words
The spring core according to claim 10 wherein ends of spring elements of one plate are shaped as sockets with edges formed so as to center an opposite plate.
Claim 14
Dependent Claim
16 words
The spring core according to claim 11 wherein the plates are made of a fiber-reinforced plastic.
Claim 15
Dependent Claim
26 words
The spring core according to claim 12 wherein the spring core is reinforced in places subject to especially heavy wear by insertion of reinforcement spring elements.
Claim 16
Dependent Claim
16 words
The spring core according to claim 10 wherein the plates are made of a fiber-reinforced plastic.
Claim 17
Dependent Claim
26 words
The spring core according to claim 14 wherein the spring core is reinforced in places subject to especially heavy wear by insertion of reinforcement spring elements.
Claim 18
Dependent Claim
26 words
The spring core according to claim 10 wherein the spring core is reinforced in places subject to especially heavy wear by insertion of reinforcement spring elements.
Claim 19
Dependent Claim
76 words
A spring core for a mattress or seat-cushion comprising: at least two plates, each of said plates having spring elements bent out of a multiplicity of openings, wherein the spring elements of one plate oppose spring elements of an opposite plate, and are bent as mirror-images of spring elements of an opposite plate and wherein ends of spring elements of one plate are shaped as sockets with edges formed so as to center an opposite plate.
Claim 20
Dependent Claim
76 words
A spring core for a mattress or seat-cushion comprising: at least two plates, each of said plates having spring elements bent out of a multiplicity of openings, wherein the spring elements of one plate oppose spring elements of an opposite plate, and are bent as mirror-images of spring elements of an opposite plate and wherein ends of spring elements of one plate are shaped as sockets with edges formed so as to center an opposite plate.
Claim 21
Dependent Claim
16 words
The spring core according to claim 17 wherein the plates are made of a fiber-reinforced plastic.
Claim 22
Dependent Claim
26 words
The spring core according to claim 18 wherein the spring core is reinforced in places subject to especially heavy wear by insertion of reinforcement spring elements.
Claim 23
Dependent Claim
16 words
The spring core according to claim 17 wherein the plates are made of a fiber-reinforced plastic.
Claim 24
Dependent Claim
26 words
The spring core according to claim 20 wherein the spring core is reinforced in places subject to especially heavy wear by insertion of reinforcement spring elements.
Claim 25
Dependent Claim
26 words
The spring core according to claim 17 wherein the spring core is reinforced in places subject to especially heavy wear by insertion of reinforcement spring elements.
References Cited (Backward Citations)
US1630459A
Cited
US2277853A
Cited
US2313171A
Cited
US3879025A
Cited
US3974532A
Cited
US4713854A
Cited
US4682378A
Cited
US4935977A
Cited
US5409200A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-07-27 | 2002-01-26 | 2002-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-07-27 | 2006-01-26 | 2006-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-07-27 | 2010-01-26 | 2010-07-28 | $7700.00 | Window Closed / Lapsed |