Patent US4230302A successfully refreshed from Google Patents.
US4230302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carpet stretcher
Assignee: Crain Cutter Co Inc
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Filing: 1979-07-19
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Granted: 1980-10-28
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Expires: 1999-07-19
Abstract
Abstract A carpet stretcher comprising a pin head. Extending from the pin head in a rearward direction is a sliding bar having a square cross-sectional area. Tubular telescoping extension members freely receive the sliding bar which extends in the axial direction thereof. At the free end of the tubular members is pivotally mounted a wall engaging member. At the opposite end of the tubular members is pivotally mounted a locking lever. A handle is pivotally mounted on the pin head and extends toward the tubular members. Intermediate the ends of the handle is linkage that pivotally connects the handle to the tubular members. Initially, the handle is depressed to apply an axial stretching force to a portion of a carpet. Stretched carpeting produces an axial reactive force within the carpet stretcher. After the portion of the carpet is stretched to the desired extent, the operator actuates the locking lever, which engages the sliding bar through a pivotal movement to retain the sliding bar in the extended position relative to the tubular members against the axial reactive force resulting from the stretched portion of the carpet. Subsequently, the operator again depresses the handle to release the axial reactive force and to enable the locking lever to assume a position for the sliding bar to move freely relative thereto.
Inventors
- 👤 Millard Crain, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:43
CPC Classifications
A; A47; A47G; A47G27/00; A47G27/04; A47G27/0487; A47G27/0493
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
180 words
A carpet stretcher comprising: (a) a pin head; (b) a sliding bar fixed to said pin head and extending rearwardly therefrom; (c) a tubular assembly freely receiving said sliding bar in the axial direction thereof; (d) a wall engaging member mounted on the rearward end of said tubular assembly; (e) a sliding bar locking mechanism fixed to the forward end of said tubular assembly, said sliding bar locking mechanism including a movable locking lever extending transversely relative to said sliding bar and formed with an aperture to receive said sliding bar, said locking lever being movable to retain said sliding bar in a fixed position relative to said tubular assembly and being movable to release said sliding bar for enabling said sliding bar to be freely movable relative to said tubular assembly; (f) a handle pivotally connected to said pin head and projecting in the general direction of said tubular assembly; and (g) linkage interconnecting said handle and said tubular assembly, the movement of said handle enables said locking lever to be released from locking engagement with said sliding bar.
Claim 2
Dependent Claim
180 words
A carpet stretcher comprising: (a) a pin head; (b) a sliding bar fixed to said pin head and extending rearwardly therefrom; (c) a tubular assembly freely receiving said sliding bar in the axial direction thereof; (d) a wall engaging member mounted on the rearward end of said tubular assembly; (e) a sliding bar locking mechanism fixed to the forward end of said tubular assembly, said sliding bar locking mechanism including a movable locking lever extending transversely relative to said sliding bar and formed with an aperture to receive said sliding bar, said locking lever being movable to retain said sliding bar in a fixed position relative to said tubular assembly and being movable to release said sliding bar for enabling said sliding bar to be freely movable relative to said tubular assembly; (f) a handle pivotally connected to said pin head and projecting in the general direction of said tubular assembly; and (g) linkage interconnecting said handle and said tubular assembly, the movement of said handle enables said locking lever to be released from locking engagement with said sliding bar.
Claim 3
Dependent Claim
106 words
A carpet stretcher as claimed in claim 1 wherein said sliding bar locking mechanism comprises means for supporting said locking lever for pivotal movement about a vertically disposed axis, said locking lever being movable in a generally fore and aft direction relative to said sliding bar for engaging said sliding bar to lock said sliding bar in a fixed position relative to said tubular assembly and for releasing said sliding bar to enable said sliding bar to be moved relative to said tubular assembly, the movement of said handle enables said locking lever to move in a direction to release said sliding bar from locking engagement.
Claim 4
Dependent Claim
37 words
A carpet stretcher as claimed in claim 1 wherein said aperture formed in said sliding bar locking lever is shaped to conform to the configuration of the cross-sectional area of said sliding bar but greater in dimension.
Claim 5
Dependent Claim
17 words
A carpet stretcher as claimed in claim 3 wherein said sliding bar has a rectangular cross-sectional area.
Claim 6
Dependent Claim
37 words
A carpet stretcher as claimed in claim 2 wherein said aperture formed in said sliding bar locking lever is shaped to conform to the configuration of the cross-sectional area of said sliding bar but greater in dimension.
Claim 7
Dependent Claim
17 words
A carpet stretcher as claimed in claim 5 wherein said sliding bar has a rectangular cross-sectional area.
Claim 8
Dependent Claim
363 words
A carpet stretcher comprising: (a) a pin head; (b) a sliding bar fixed to said pin head and extending rearwardly therefrom; (c) a tubular assembly freely receiving said sliding bar in the axial direction thereof; (d) a wall engaging member mounted on the rearward end of said tubular assembly; (e) a sliding bar locking mechanism fixed to the forward end of said tubular assembly, said sliding bar locking mechanism including a movable locking lever extending transversely relative to said sliding bar and formed with an aperture to receive said sliding bar, said locking lever being movable to retain said sliding bar in a fixed position relative to said tubular assembly and being movable to release said sliding bar for enabling said sliding bar to be freely movable relative to said tubular assembly; (f) a handle pivotally connected to said pin head and projecting in the general direction of said tubular assembly; and (g) linkage interconnecting said handle and said tubular assembly, the movement of said handle enables said locking lever to be released from locking engagement with said sliding bar, (h) said sliding bar locking mechanism further comprising: a right angular bracket fixed to the forward end of said tubular assembly, said right angular bracket being formed with a first plate extending transversely relative to said sliding bar, a second plate extending in the general direction of said sliding bar along a side of said sliding bar, and a third plate spaced from said second plate, said first plate being apertured to freely receive said sliding bar, and a vertically disposed pin mounted on said second plate, said locking lever being disposed between said third plate and said pin for pivotal movement about a vertically disposed axis, said locking lever being movable in a generally forward aft direction relative to said sliding bar for engaging said sliding bar to retain said sliding bar in a fixed position relative to said tubular assembly and for releasing said sliding bar to enable said sliding bar to be moved relative to said tubular assembly, the movement of said handle enables said locking lever to move in a direction to release said sliding bar from locking engagement.
Claim 9
Dependent Claim
363 words
A carpet stretcher comprising: (a) a pin head; (b) a sliding bar fixed to said pin head and extending rearwardly therefrom; (c) a tubular assembly freely receiving said sliding bar in the axial direction thereof; (d) a wall engaging member mounted on the rearward end of said tubular assembly; (e) a sliding bar locking mechanism fixed to the forward end of said tubular assembly, said sliding bar locking mechanism including a movable locking lever extending transversely relative to said sliding bar and formed with an aperture to receive said sliding bar, said locking lever being movable to retain said sliding bar in a fixed position relative to said tubular assembly and being movable to release said sliding bar for enabling said sliding bar to be freely movable relative to said tubular assembly; (f) a handle pivotally connected to said pin head and projecting in the general direction of said tubular assembly; and (g) linkage interconnecting said handle and said tubular assembly, the movement of said handle enables said locking lever to be released from locking engagement with said sliding bar, (h) said sliding bar locking mechanism further comprising: a right angular bracket fixed to the forward end of said tubular assembly, said right angular bracket being formed with a first plate extending transversely relative to said sliding bar, a second plate extending in the general direction of said sliding bar along a side of said sliding bar, and a third plate spaced from said second plate, said first plate being apertured to freely receive said sliding bar, and a vertically disposed pin mounted on said second plate, said locking lever being disposed between said third plate and said pin for pivotal movement about a vertically disposed axis, said locking lever being movable in a generally forward aft direction relative to said sliding bar for engaging said sliding bar to retain said sliding bar in a fixed position relative to said tubular assembly and for releasing said sliding bar to enable said sliding bar to be moved relative to said tubular assembly, the movement of said handle enables said locking lever to move in a direction to release said sliding bar from locking engagement.
Claim 10
Dependent Claim
37 words
A carpet stretcher as claimed in claim 7 wherein said aperture formed in said sliding bar locking lever is shaped to conform to the configuration of the cross-sectional area of said sliding bar but greater in dimension.
Claim 11
Dependent Claim
35 words
A carpet stretcher as claimed in claim 8 wherein said aperture formed in said first plate is shaped to conform to the configuration of the cross-sectional area of said sliding bar but greater in dimension.
Claim 12
Dependent Claim
17 words
A carpet stretcher as claimed in claim 9 wherein said sliding bar has a rectangular cross-sectional area.
Claim 13
Dependent Claim
33 words
A carpet stretcher as claimed in claim 7 wherein said right angular bracket includes a bottom plate disposed below said lever to inhibit tufts of carpet from entering said sliding bar locking mechanism.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-10-28 | 1984-04-28 | 1984-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-28 | 1988-04-28 | 1988-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-28 | 1992-04-28 | 1992-10-28 | $7700.00 | Window Closed / Lapsed |