US4567634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tool for compressing valve springs
Assignee: Individual
•
Filing: 1984-07-18
•
Granted: 1986-02-04
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Expires: 2004-07-18
Abstract
Abstract A tool for compressing valve springs including: a lever which has a spring engaging portion, a fulcrum portion spaced from the spring engaging portion and an axis which extends generally from the fulcrum portion to the spring engaging portion. A torque transmitting element is fitted to the lever and includes a torquing axis which extends transversely to the axis of the lever. The torque transmitting element is releasably engageable with an elongate shaft in order to establish axial alignment between the shaft and the torque transmitting element and enable the shaft and the torque transmitting element to rotate together. The torque transmitting element transmits to the lever rotational torque applied to the shaft, thereby pivoting the lever about the fulcrum portion to force the spring engaging portion to compress the valve spring.
Inventors
- 👤 William H. Landry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:50
CPC Classifications
B; B25; B25B; B25B27/00; B25B27/14; B25B27/24; B25B27/26; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53552; Y10T29/53561; Y10T29/53578; Y10T29/53583; Y10T29/53796; Y10T29/53896
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
134 words
A valve spring compressing tool comprising: lever means including a spring engaging portion, a fulcrum portion spaced from said spring engaging portion, and an axis which extends generally from said fulcrum portion to said spring engaging portion; and torque transmitting means fixed to said lever means and including a rotational axis which extends transversely to said axis of said lever means, and means releasably engageable with complementary means at the end of an elongate shaft for establishing axial alignment between said shaft and said rotational axis and enabling said shaft and said torque transmitting means to axially rotate together; said torque transmitting means transmitting, to said lever means, rotational torque applied to the shaft to pivot said lever means about said fulcrum portion and force said spring engaging portion to compress the valve spring.
Claim 2
Dependent Claim
134 words
A valve spring compressing tool comprising: lever means including a spring engaging portion, a fulcrum portion spaced from said spring engaging portion, and an axis which extends generally from said fulcrum portion to said spring engaging portion; and torque transmitting means fixed to said lever means and including a rotational axis which extends transversely to said axis of said lever means, and means releasably engageable with complementary means at the end of an elongate shaft for establishing axial alignment between said shaft and said rotational axis and enabling said shaft and said torque transmitting means to axially rotate together; said torque transmitting means transmitting, to said lever means, rotational torque applied to the shaft to pivot said lever means about said fulcrum portion and force said spring engaging portion to compress the valve spring.
Claim 3
Dependent Claim
32 words
The tool of claim 1 in which said lever means includes a bifurcated element having a pair of prongs which include said spring engaging portion, and recess means disposed between said prongs.
Claim 4
Dependent Claim
20 words
The tool of claim 2 in which said recess means receives a rocker arm stud mounted proximate the valve spring.
Claim 5
Dependent Claim
19 words
The tool of claim 3 in which said fulcrum portion pivots about means attached to the rocker arm stud.
Claim 6
Dependent Claim
18 words
The tool of claim 4 in which the means attached to the rocker arm stud includes a nut.
Claim 7
Dependent Claim
15 words
The tool of claim 1 in which said torque transmitting means includes a cylindrical element.
Claim 8
Dependent Claim
44 words
The tool of claim 1 in which said releasably engageable means includes an axial bore disposed in said torque transmitting means and said complementary means includes an insertion member receivable by said bore, said insertion member and said bore having complementary cross sectional shapes.
Claim 9
Dependent Claim
18 words
The tool of claim 7 in which said bore and said insertion member include complementary square cross sections.
Claim 10
Dependent Claim
20 words
The tool of claim 1 in which said fulcrum portion pivots about an elongate bar mounted proxiamte the valve spring.
Claim 11
Dependent Claim
22 words
The tool of claim 1 in which said fulcrum means is disposed between said spring engaging means and said torque transmitting means.
Claim 12
Dependent Claim
138 words
A valve spring compressing tool comprising: lever means including a spring engaging portion, a fulcrum portion spaced from said spring engaging portion, and an axis which extends generally from said fulcrum portion to said spring engaging portion; torque transmitting means, fixed to said lever means and including a rotational axis which extends transversely to said axis of said lever means; and an elongate shaft connected at one end to said torque transmitting means and having a longitudinal axis which is alinged with said rotational axis of said torque transmitting means to enable said torque transmitting means and said shaft to axially rotate together; said torque transmitting means transmitting, to said lever means, rotational torque applied to said shaft to pivot said lever means about said fulcrum portion and force said spring engaging portion to compress the valve spring.
Claim 13
Dependent Claim
138 words
A valve spring compressing tool comprising: lever means including a spring engaging portion, a fulcrum portion spaced from said spring engaging portion, and an axis which extends generally from said fulcrum portion to said spring engaging portion; torque transmitting means, fixed to said lever means and including a rotational axis which extends transversely to said axis of said lever means; and an elongate shaft connected at one end to said torque transmitting means and having a longitudinal axis which is alinged with said rotational axis of said torque transmitting means to enable said torque transmitting means and said shaft to axially rotate together; said torque transmitting means transmitting, to said lever means, rotational torque applied to said shaft to pivot said lever means about said fulcrum portion and force said spring engaging portion to compress the valve spring.
Claim 14
Dependent Claim
15 words
The tool of claim 11 further including means for applying rotational torque to said shaft.
Claim 15
Dependent Claim
32 words
The tool of claim 11 in which said lever means includes a bifurcated element having a pair of prongs, which include said spring engaging portion, and recess means disposed between said prongs.
Claim 16
Dependent Claim
15 words
The tool of claim 11 in which said torque transmitting means includes a cylindrical element.
Claim 17
Dependent Claim
18 words
The tool of claim 11 further including means for releasably connecting said torque transmitting means with said shaft.
Claim 18
Dependent Claim
49 words
The tool of claim 15 in which said means for releasably connecting includes an axial bore disposed in said torque transmitting means and an insertion member carried at one end of said shaft and receivable by said bore, said insertion member and said bore having complementary cross sectional shapes.
Claim 19
Dependent Claim
18 words
The tool of claim 16 in which said bore and said insertion member include complementary square cross sections.
References Cited (Backward Citations)
US486300A
Cited
FR353135A
Cited
US1370397A
Cited
US1438791A
Cited
US1516712A
Cited
US2311956A
Cited
US3295193A
Cited
US3873067A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-02-03 | 1989-08-05 | 1990-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-03 | 1993-08-05 | 1994-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-03 | 1997-08-05 | 1998-02-04 | $7700.00 | Window Closed / Lapsed |